| /* |
| * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "precompiled.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "compiler/compileBroker.hpp" |
| #include "compiler/compileLog.hpp" |
| #include "oops/objArrayKlass.hpp" |
| #include "opto/addnode.hpp" |
| #include "opto/callGenerator.hpp" |
| #include "opto/cfgnode.hpp" |
| #include "opto/idealKit.hpp" |
| #include "opto/mulnode.hpp" |
| #include "opto/parse.hpp" |
| #include "opto/runtime.hpp" |
| #include "opto/subnode.hpp" |
| #include "prims/nativeLookup.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| |
| class LibraryIntrinsic : public InlineCallGenerator { |
| // Extend the set of intrinsics known to the runtime: |
| public: |
| private: |
| bool _is_virtual; |
| vmIntrinsics::ID _intrinsic_id; |
| |
| public: |
| LibraryIntrinsic(ciMethod* m, bool is_virtual, vmIntrinsics::ID id) |
| : InlineCallGenerator(m), |
| _is_virtual(is_virtual), |
| _intrinsic_id(id) |
| { |
| } |
| virtual bool is_intrinsic() const { return true; } |
| virtual bool is_virtual() const { return _is_virtual; } |
| virtual JVMState* generate(JVMState* jvms); |
| vmIntrinsics::ID intrinsic_id() const { return _intrinsic_id; } |
| }; |
| |
| |
| // Local helper class for LibraryIntrinsic: |
| class LibraryCallKit : public GraphKit { |
| private: |
| LibraryIntrinsic* _intrinsic; // the library intrinsic being called |
| |
| public: |
| LibraryCallKit(JVMState* caller, LibraryIntrinsic* intrinsic) |
| : GraphKit(caller), |
| _intrinsic(intrinsic) |
| { |
| } |
| |
| ciMethod* caller() const { return jvms()->method(); } |
| int bci() const { return jvms()->bci(); } |
| LibraryIntrinsic* intrinsic() const { return _intrinsic; } |
| vmIntrinsics::ID intrinsic_id() const { return _intrinsic->intrinsic_id(); } |
| ciMethod* callee() const { return _intrinsic->method(); } |
| ciSignature* signature() const { return callee()->signature(); } |
| int arg_size() const { return callee()->arg_size(); } |
| |
| bool try_to_inline(); |
| |
| // Helper functions to inline natives |
| void push_result(RegionNode* region, PhiNode* value); |
| Node* generate_guard(Node* test, RegionNode* region, float true_prob); |
| Node* generate_slow_guard(Node* test, RegionNode* region); |
| Node* generate_fair_guard(Node* test, RegionNode* region); |
| Node* generate_negative_guard(Node* index, RegionNode* region, |
| // resulting CastII of index: |
| Node* *pos_index = NULL); |
| Node* generate_nonpositive_guard(Node* index, bool never_negative, |
| // resulting CastII of index: |
| Node* *pos_index = NULL); |
| Node* generate_limit_guard(Node* offset, Node* subseq_length, |
| Node* array_length, |
| RegionNode* region); |
| Node* generate_current_thread(Node* &tls_output); |
| address basictype2arraycopy(BasicType t, Node *src_offset, Node *dest_offset, |
| bool disjoint_bases, const char* &name, bool dest_uninitialized); |
| Node* load_mirror_from_klass(Node* klass); |
| Node* load_klass_from_mirror_common(Node* mirror, bool never_see_null, |
| int nargs, |
| RegionNode* region, int null_path, |
| int offset); |
| Node* load_klass_from_mirror(Node* mirror, bool never_see_null, int nargs, |
| RegionNode* region, int null_path) { |
| int offset = java_lang_Class::klass_offset_in_bytes(); |
| return load_klass_from_mirror_common(mirror, never_see_null, nargs, |
| region, null_path, |
| offset); |
| } |
| Node* load_array_klass_from_mirror(Node* mirror, bool never_see_null, |
| int nargs, |
| RegionNode* region, int null_path) { |
| int offset = java_lang_Class::array_klass_offset_in_bytes(); |
| return load_klass_from_mirror_common(mirror, never_see_null, nargs, |
| region, null_path, |
| offset); |
| } |
| Node* generate_access_flags_guard(Node* kls, |
| int modifier_mask, int modifier_bits, |
| RegionNode* region); |
| Node* generate_interface_guard(Node* kls, RegionNode* region); |
| Node* generate_array_guard(Node* kls, RegionNode* region) { |
| return generate_array_guard_common(kls, region, false, false); |
| } |
| Node* generate_non_array_guard(Node* kls, RegionNode* region) { |
| return generate_array_guard_common(kls, region, false, true); |
| } |
| Node* generate_objArray_guard(Node* kls, RegionNode* region) { |
| return generate_array_guard_common(kls, region, true, false); |
| } |
| Node* generate_non_objArray_guard(Node* kls, RegionNode* region) { |
| return generate_array_guard_common(kls, region, true, true); |
| } |
| Node* generate_array_guard_common(Node* kls, RegionNode* region, |
| bool obj_array, bool not_array); |
| Node* generate_virtual_guard(Node* obj_klass, RegionNode* slow_region); |
| CallJavaNode* generate_method_call(vmIntrinsics::ID method_id, |
| bool is_virtual = false, bool is_static = false); |
| CallJavaNode* generate_method_call_static(vmIntrinsics::ID method_id) { |
| return generate_method_call(method_id, false, true); |
| } |
| CallJavaNode* generate_method_call_virtual(vmIntrinsics::ID method_id) { |
| return generate_method_call(method_id, true, false); |
| } |
| |
| Node* make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2); |
| Node* make_string_method_node(int opcode, Node* str1, Node* str2); |
| bool inline_string_compareTo(); |
| bool inline_string_indexOf(); |
| Node* string_indexOf(Node* string_object, ciTypeArray* target_array, jint offset, jint cache_i, jint md2_i); |
| bool inline_string_equals(); |
| Node* pop_math_arg(); |
| bool runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName); |
| bool inline_math_native(vmIntrinsics::ID id); |
| bool inline_trig(vmIntrinsics::ID id); |
| bool inline_trans(vmIntrinsics::ID id); |
| bool inline_abs(vmIntrinsics::ID id); |
| bool inline_sqrt(vmIntrinsics::ID id); |
| bool inline_pow(vmIntrinsics::ID id); |
| bool inline_exp(vmIntrinsics::ID id); |
| bool inline_min_max(vmIntrinsics::ID id); |
| Node* generate_min_max(vmIntrinsics::ID id, Node* x, Node* y); |
| // This returns Type::AnyPtr, RawPtr, or OopPtr. |
| int classify_unsafe_addr(Node* &base, Node* &offset); |
| Node* make_unsafe_address(Node* base, Node* offset); |
| // Helper for inline_unsafe_access. |
| // Generates the guards that check whether the result of |
| // Unsafe.getObject should be recorded in an SATB log buffer. |
| void insert_g1_pre_barrier(Node* base_oop, Node* offset, Node* pre_val); |
| bool inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile); |
| bool inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static); |
| bool inline_unsafe_allocate(); |
| bool inline_unsafe_copyMemory(); |
| bool inline_native_currentThread(); |
| #ifdef TRACE_HAVE_INTRINSICS |
| bool inline_native_classID(); |
| bool inline_native_threadID(); |
| #endif |
| bool inline_native_time_funcs(address method, const char* funcName); |
| bool inline_native_isInterrupted(); |
| bool inline_native_Class_query(vmIntrinsics::ID id); |
| bool inline_native_subtype_check(); |
| |
| bool inline_native_newArray(); |
| bool inline_native_getLength(); |
| bool inline_array_copyOf(bool is_copyOfRange); |
| bool inline_array_equals(); |
| void copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark); |
| bool inline_native_clone(bool is_virtual); |
| bool inline_native_Reflection_getCallerClass(); |
| bool inline_native_AtomicLong_get(); |
| bool inline_native_AtomicLong_attemptUpdate(); |
| bool is_method_invoke_or_aux_frame(JVMState* jvms); |
| // Helper function for inlining native object hash method |
| bool inline_native_hashcode(bool is_virtual, bool is_static); |
| bool inline_native_getClass(); |
| |
| // Helper functions for inlining arraycopy |
| bool inline_arraycopy(); |
| void generate_arraycopy(const TypePtr* adr_type, |
| BasicType basic_elem_type, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, |
| bool disjoint_bases = false, |
| bool length_never_negative = false, |
| RegionNode* slow_region = NULL); |
| AllocateArrayNode* tightly_coupled_allocation(Node* ptr, |
| RegionNode* slow_region); |
| void generate_clear_array(const TypePtr* adr_type, |
| Node* dest, |
| BasicType basic_elem_type, |
| Node* slice_off, |
| Node* slice_len, |
| Node* slice_end); |
| bool generate_block_arraycopy(const TypePtr* adr_type, |
| BasicType basic_elem_type, |
| AllocateNode* alloc, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* dest_size, bool dest_uninitialized); |
| void generate_slow_arraycopy(const TypePtr* adr_type, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, bool dest_uninitialized); |
| Node* generate_checkcast_arraycopy(const TypePtr* adr_type, |
| Node* dest_elem_klass, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, bool dest_uninitialized); |
| Node* generate_generic_arraycopy(const TypePtr* adr_type, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, bool dest_uninitialized); |
| void generate_unchecked_arraycopy(const TypePtr* adr_type, |
| BasicType basic_elem_type, |
| bool disjoint_bases, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, bool dest_uninitialized); |
| bool inline_unsafe_CAS(BasicType type); |
| bool inline_unsafe_ordered_store(BasicType type); |
| bool inline_fp_conversions(vmIntrinsics::ID id); |
| bool inline_numberOfLeadingZeros(vmIntrinsics::ID id); |
| bool inline_numberOfTrailingZeros(vmIntrinsics::ID id); |
| bool inline_bitCount(vmIntrinsics::ID id); |
| bool inline_reverseBytes(vmIntrinsics::ID id); |
| |
| bool inline_reference_get(); |
| }; |
| |
| |
| //---------------------------make_vm_intrinsic---------------------------- |
| CallGenerator* Compile::make_vm_intrinsic(ciMethod* m, bool is_virtual) { |
| vmIntrinsics::ID id = m->intrinsic_id(); |
| assert(id != vmIntrinsics::_none, "must be a VM intrinsic"); |
| |
| if (DisableIntrinsic[0] != '\0' |
| && strstr(DisableIntrinsic, vmIntrinsics::name_at(id)) != NULL) { |
| // disabled by a user request on the command line: |
| // example: -XX:DisableIntrinsic=_hashCode,_getClass |
| return NULL; |
| } |
| |
| if (!m->is_loaded()) { |
| // do not attempt to inline unloaded methods |
| return NULL; |
| } |
| |
| // Only a few intrinsics implement a virtual dispatch. |
| // They are expensive calls which are also frequently overridden. |
| if (is_virtual) { |
| switch (id) { |
| case vmIntrinsics::_hashCode: |
| case vmIntrinsics::_clone: |
| // OK, Object.hashCode and Object.clone intrinsics come in both flavors |
| break; |
| default: |
| return NULL; |
| } |
| } |
| |
| // -XX:-InlineNatives disables nearly all intrinsics: |
| if (!InlineNatives) { |
| switch (id) { |
| case vmIntrinsics::_indexOf: |
| case vmIntrinsics::_compareTo: |
| case vmIntrinsics::_equals: |
| case vmIntrinsics::_equalsC: |
| break; // InlineNatives does not control String.compareTo |
| default: |
| return NULL; |
| } |
| } |
| |
| switch (id) { |
| case vmIntrinsics::_compareTo: |
| if (!SpecialStringCompareTo) return NULL; |
| break; |
| case vmIntrinsics::_indexOf: |
| if (!SpecialStringIndexOf) return NULL; |
| break; |
| case vmIntrinsics::_equals: |
| if (!SpecialStringEquals) return NULL; |
| break; |
| case vmIntrinsics::_equalsC: |
| if (!SpecialArraysEquals) return NULL; |
| break; |
| case vmIntrinsics::_arraycopy: |
| if (!InlineArrayCopy) return NULL; |
| break; |
| case vmIntrinsics::_copyMemory: |
| if (StubRoutines::unsafe_arraycopy() == NULL) return NULL; |
| if (!InlineArrayCopy) return NULL; |
| break; |
| case vmIntrinsics::_hashCode: |
| if (!InlineObjectHash) return NULL; |
| break; |
| case vmIntrinsics::_clone: |
| case vmIntrinsics::_copyOf: |
| case vmIntrinsics::_copyOfRange: |
| if (!InlineObjectCopy) return NULL; |
| // These also use the arraycopy intrinsic mechanism: |
| if (!InlineArrayCopy) return NULL; |
| break; |
| case vmIntrinsics::_checkIndex: |
| // We do not intrinsify this. The optimizer does fine with it. |
| return NULL; |
| |
| case vmIntrinsics::_get_AtomicLong: |
| case vmIntrinsics::_attemptUpdate: |
| if (!InlineAtomicLong) return NULL; |
| break; |
| |
| case vmIntrinsics::_getCallerClass: |
| if (!UseNewReflection) return NULL; |
| if (!InlineReflectionGetCallerClass) return NULL; |
| if (!JDK_Version::is_gte_jdk14x_version()) return NULL; |
| break; |
| |
| case vmIntrinsics::_bitCount_i: |
| if (!Matcher::match_rule_supported(Op_PopCountI)) return NULL; |
| break; |
| |
| case vmIntrinsics::_bitCount_l: |
| if (!Matcher::match_rule_supported(Op_PopCountL)) return NULL; |
| break; |
| |
| case vmIntrinsics::_numberOfLeadingZeros_i: |
| if (!Matcher::match_rule_supported(Op_CountLeadingZerosI)) return NULL; |
| break; |
| |
| case vmIntrinsics::_numberOfLeadingZeros_l: |
| if (!Matcher::match_rule_supported(Op_CountLeadingZerosL)) return NULL; |
| break; |
| |
| case vmIntrinsics::_numberOfTrailingZeros_i: |
| if (!Matcher::match_rule_supported(Op_CountTrailingZerosI)) return NULL; |
| break; |
| |
| case vmIntrinsics::_numberOfTrailingZeros_l: |
| if (!Matcher::match_rule_supported(Op_CountTrailingZerosL)) return NULL; |
| break; |
| |
| case vmIntrinsics::_Reference_get: |
| // It is only when G1 is enabled that we absolutely |
| // need to use the intrinsic version of Reference.get() |
| // so that the value in the referent field, if necessary, |
| // can be registered by the pre-barrier code. |
| if (!UseG1GC) return NULL; |
| break; |
| |
| default: |
| assert(id <= vmIntrinsics::LAST_COMPILER_INLINE, "caller responsibility"); |
| assert(id != vmIntrinsics::_Object_init && id != vmIntrinsics::_invoke, "enum out of order?"); |
| break; |
| } |
| |
| // -XX:-InlineClassNatives disables natives from the Class class. |
| // The flag applies to all reflective calls, notably Array.newArray |
| // (visible to Java programmers as Array.newInstance). |
| if (m->holder()->name() == ciSymbol::java_lang_Class() || |
| m->holder()->name() == ciSymbol::java_lang_reflect_Array()) { |
| if (!InlineClassNatives) return NULL; |
| } |
| |
| // -XX:-InlineThreadNatives disables natives from the Thread class. |
| if (m->holder()->name() == ciSymbol::java_lang_Thread()) { |
| if (!InlineThreadNatives) return NULL; |
| } |
| |
| // -XX:-InlineMathNatives disables natives from the Math,Float and Double classes. |
| if (m->holder()->name() == ciSymbol::java_lang_Math() || |
| m->holder()->name() == ciSymbol::java_lang_Float() || |
| m->holder()->name() == ciSymbol::java_lang_Double()) { |
| if (!InlineMathNatives) return NULL; |
| } |
| |
| // -XX:-InlineUnsafeOps disables natives from the Unsafe class. |
| if (m->holder()->name() == ciSymbol::sun_misc_Unsafe()) { |
| if (!InlineUnsafeOps) return NULL; |
| } |
| |
| return new LibraryIntrinsic(m, is_virtual, (vmIntrinsics::ID) id); |
| } |
| |
| //----------------------register_library_intrinsics----------------------- |
| // Initialize this file's data structures, for each Compile instance. |
| void Compile::register_library_intrinsics() { |
| // Nothing to do here. |
| } |
| |
| JVMState* LibraryIntrinsic::generate(JVMState* jvms) { |
| LibraryCallKit kit(jvms, this); |
| Compile* C = kit.C; |
| int nodes = C->unique(); |
| #ifndef PRODUCT |
| if ((PrintIntrinsics || PrintInlining NOT_PRODUCT( || PrintOptoInlining) ) && Verbose) { |
| char buf[1000]; |
| const char* str = vmIntrinsics::short_name_as_C_string(intrinsic_id(), buf, sizeof(buf)); |
| tty->print_cr("Intrinsic %s", str); |
| } |
| #endif |
| |
| if (kit.try_to_inline()) { |
| if (PrintIntrinsics || PrintInlining NOT_PRODUCT( || PrintOptoInlining) ) { |
| CompileTask::print_inlining(kit.callee(), jvms->depth() - 1, kit.bci(), is_virtual() ? "(intrinsic, virtual)" : "(intrinsic)"); |
| } |
| C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_worked); |
| if (C->log()) { |
| C->log()->elem("intrinsic id='%s'%s nodes='%d'", |
| vmIntrinsics::name_at(intrinsic_id()), |
| (is_virtual() ? " virtual='1'" : ""), |
| C->unique() - nodes); |
| } |
| return kit.transfer_exceptions_into_jvms(); |
| } |
| |
| // The intrinsic bailed out |
| if (PrintIntrinsics || PrintInlining NOT_PRODUCT( || PrintOptoInlining) ) { |
| if (jvms->has_method()) { |
| // Not a root compile. |
| const char* msg = is_virtual() ? "failed to inline (intrinsic, virtual)" : "failed to inline (intrinsic)"; |
| CompileTask::print_inlining(kit.callee(), jvms->depth() - 1, kit.bci(), msg); |
| } else { |
| // Root compile |
| tty->print("Did not generate intrinsic %s%s at bci:%d in", |
| vmIntrinsics::name_at(intrinsic_id()), |
| (is_virtual() ? " (virtual)" : ""), kit.bci()); |
| } |
| } |
| C->gather_intrinsic_statistics(intrinsic_id(), is_virtual(), Compile::_intrinsic_failed); |
| return NULL; |
| } |
| |
| bool LibraryCallKit::try_to_inline() { |
| // Handle symbolic names for otherwise undistinguished boolean switches: |
| const bool is_store = true; |
| const bool is_native_ptr = true; |
| const bool is_static = true; |
| |
| if (!jvms()->has_method()) { |
| // Root JVMState has a null method. |
| assert(map()->memory()->Opcode() == Op_Parm, ""); |
| // Insert the memory aliasing node |
| set_all_memory(reset_memory()); |
| } |
| assert(merged_memory(), ""); |
| |
| switch (intrinsic_id()) { |
| case vmIntrinsics::_hashCode: |
| return inline_native_hashcode(intrinsic()->is_virtual(), !is_static); |
| case vmIntrinsics::_identityHashCode: |
| return inline_native_hashcode(/*!virtual*/ false, is_static); |
| case vmIntrinsics::_getClass: |
| return inline_native_getClass(); |
| |
| case vmIntrinsics::_dsin: |
| case vmIntrinsics::_dcos: |
| case vmIntrinsics::_dtan: |
| case vmIntrinsics::_dabs: |
| case vmIntrinsics::_datan2: |
| case vmIntrinsics::_dsqrt: |
| case vmIntrinsics::_dexp: |
| case vmIntrinsics::_dlog: |
| case vmIntrinsics::_dlog10: |
| case vmIntrinsics::_dpow: |
| return inline_math_native(intrinsic_id()); |
| |
| case vmIntrinsics::_min: |
| case vmIntrinsics::_max: |
| return inline_min_max(intrinsic_id()); |
| |
| case vmIntrinsics::_arraycopy: |
| return inline_arraycopy(); |
| |
| case vmIntrinsics::_compareTo: |
| return inline_string_compareTo(); |
| case vmIntrinsics::_indexOf: |
| return inline_string_indexOf(); |
| case vmIntrinsics::_equals: |
| return inline_string_equals(); |
| |
| case vmIntrinsics::_getObject: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, false); |
| case vmIntrinsics::_getBoolean: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, false); |
| case vmIntrinsics::_getByte: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, false); |
| case vmIntrinsics::_getShort: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, false); |
| case vmIntrinsics::_getChar: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, false); |
| case vmIntrinsics::_getInt: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, false); |
| case vmIntrinsics::_getLong: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, false); |
| case vmIntrinsics::_getFloat: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, false); |
| case vmIntrinsics::_getDouble: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, false); |
| |
| case vmIntrinsics::_putObject: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, false); |
| case vmIntrinsics::_putBoolean: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, false); |
| case vmIntrinsics::_putByte: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, false); |
| case vmIntrinsics::_putShort: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, false); |
| case vmIntrinsics::_putChar: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, false); |
| case vmIntrinsics::_putInt: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_INT, false); |
| case vmIntrinsics::_putLong: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, false); |
| case vmIntrinsics::_putFloat: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, false); |
| case vmIntrinsics::_putDouble: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, false); |
| |
| case vmIntrinsics::_getByte_raw: |
| return inline_unsafe_access(is_native_ptr, !is_store, T_BYTE, false); |
| case vmIntrinsics::_getShort_raw: |
| return inline_unsafe_access(is_native_ptr, !is_store, T_SHORT, false); |
| case vmIntrinsics::_getChar_raw: |
| return inline_unsafe_access(is_native_ptr, !is_store, T_CHAR, false); |
| case vmIntrinsics::_getInt_raw: |
| return inline_unsafe_access(is_native_ptr, !is_store, T_INT, false); |
| case vmIntrinsics::_getLong_raw: |
| return inline_unsafe_access(is_native_ptr, !is_store, T_LONG, false); |
| case vmIntrinsics::_getFloat_raw: |
| return inline_unsafe_access(is_native_ptr, !is_store, T_FLOAT, false); |
| case vmIntrinsics::_getDouble_raw: |
| return inline_unsafe_access(is_native_ptr, !is_store, T_DOUBLE, false); |
| case vmIntrinsics::_getAddress_raw: |
| return inline_unsafe_access(is_native_ptr, !is_store, T_ADDRESS, false); |
| |
| case vmIntrinsics::_putByte_raw: |
| return inline_unsafe_access(is_native_ptr, is_store, T_BYTE, false); |
| case vmIntrinsics::_putShort_raw: |
| return inline_unsafe_access(is_native_ptr, is_store, T_SHORT, false); |
| case vmIntrinsics::_putChar_raw: |
| return inline_unsafe_access(is_native_ptr, is_store, T_CHAR, false); |
| case vmIntrinsics::_putInt_raw: |
| return inline_unsafe_access(is_native_ptr, is_store, T_INT, false); |
| case vmIntrinsics::_putLong_raw: |
| return inline_unsafe_access(is_native_ptr, is_store, T_LONG, false); |
| case vmIntrinsics::_putFloat_raw: |
| return inline_unsafe_access(is_native_ptr, is_store, T_FLOAT, false); |
| case vmIntrinsics::_putDouble_raw: |
| return inline_unsafe_access(is_native_ptr, is_store, T_DOUBLE, false); |
| case vmIntrinsics::_putAddress_raw: |
| return inline_unsafe_access(is_native_ptr, is_store, T_ADDRESS, false); |
| |
| case vmIntrinsics::_getObjectVolatile: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_OBJECT, true); |
| case vmIntrinsics::_getBooleanVolatile: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_BOOLEAN, true); |
| case vmIntrinsics::_getByteVolatile: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_BYTE, true); |
| case vmIntrinsics::_getShortVolatile: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_SHORT, true); |
| case vmIntrinsics::_getCharVolatile: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_CHAR, true); |
| case vmIntrinsics::_getIntVolatile: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_INT, true); |
| case vmIntrinsics::_getLongVolatile: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_LONG, true); |
| case vmIntrinsics::_getFloatVolatile: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_FLOAT, true); |
| case vmIntrinsics::_getDoubleVolatile: |
| return inline_unsafe_access(!is_native_ptr, !is_store, T_DOUBLE, true); |
| |
| case vmIntrinsics::_putObjectVolatile: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_OBJECT, true); |
| case vmIntrinsics::_putBooleanVolatile: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_BOOLEAN, true); |
| case vmIntrinsics::_putByteVolatile: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_BYTE, true); |
| case vmIntrinsics::_putShortVolatile: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_SHORT, true); |
| case vmIntrinsics::_putCharVolatile: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_CHAR, true); |
| case vmIntrinsics::_putIntVolatile: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_INT, true); |
| case vmIntrinsics::_putLongVolatile: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_LONG, true); |
| case vmIntrinsics::_putFloatVolatile: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_FLOAT, true); |
| case vmIntrinsics::_putDoubleVolatile: |
| return inline_unsafe_access(!is_native_ptr, is_store, T_DOUBLE, true); |
| |
| case vmIntrinsics::_prefetchRead: |
| return inline_unsafe_prefetch(!is_native_ptr, !is_store, !is_static); |
| case vmIntrinsics::_prefetchWrite: |
| return inline_unsafe_prefetch(!is_native_ptr, is_store, !is_static); |
| case vmIntrinsics::_prefetchReadStatic: |
| return inline_unsafe_prefetch(!is_native_ptr, !is_store, is_static); |
| case vmIntrinsics::_prefetchWriteStatic: |
| return inline_unsafe_prefetch(!is_native_ptr, is_store, is_static); |
| |
| case vmIntrinsics::_compareAndSwapObject: |
| return inline_unsafe_CAS(T_OBJECT); |
| case vmIntrinsics::_compareAndSwapInt: |
| return inline_unsafe_CAS(T_INT); |
| case vmIntrinsics::_compareAndSwapLong: |
| return inline_unsafe_CAS(T_LONG); |
| |
| case vmIntrinsics::_putOrderedObject: |
| return inline_unsafe_ordered_store(T_OBJECT); |
| case vmIntrinsics::_putOrderedInt: |
| return inline_unsafe_ordered_store(T_INT); |
| case vmIntrinsics::_putOrderedLong: |
| return inline_unsafe_ordered_store(T_LONG); |
| |
| case vmIntrinsics::_currentThread: |
| return inline_native_currentThread(); |
| case vmIntrinsics::_isInterrupted: |
| return inline_native_isInterrupted(); |
| |
| #ifdef TRACE_HAVE_INTRINSICS |
| case vmIntrinsics::_classID: |
| return inline_native_classID(); |
| case vmIntrinsics::_threadID: |
| return inline_native_threadID(); |
| case vmIntrinsics::_counterTime: |
| return inline_native_time_funcs(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), "counterTime"); |
| #endif |
| case vmIntrinsics::_currentTimeMillis: |
| return inline_native_time_funcs(CAST_FROM_FN_PTR(address, os::javaTimeMillis), "currentTimeMillis"); |
| case vmIntrinsics::_nanoTime: |
| return inline_native_time_funcs(CAST_FROM_FN_PTR(address, os::javaTimeNanos), "nanoTime"); |
| case vmIntrinsics::_allocateInstance: |
| return inline_unsafe_allocate(); |
| case vmIntrinsics::_copyMemory: |
| return inline_unsafe_copyMemory(); |
| case vmIntrinsics::_newArray: |
| return inline_native_newArray(); |
| case vmIntrinsics::_getLength: |
| return inline_native_getLength(); |
| case vmIntrinsics::_copyOf: |
| return inline_array_copyOf(false); |
| case vmIntrinsics::_copyOfRange: |
| return inline_array_copyOf(true); |
| case vmIntrinsics::_equalsC: |
| return inline_array_equals(); |
| case vmIntrinsics::_clone: |
| return inline_native_clone(intrinsic()->is_virtual()); |
| |
| case vmIntrinsics::_isAssignableFrom: |
| return inline_native_subtype_check(); |
| |
| case vmIntrinsics::_isInstance: |
| case vmIntrinsics::_getModifiers: |
| case vmIntrinsics::_isInterface: |
| case vmIntrinsics::_isArray: |
| case vmIntrinsics::_isPrimitive: |
| case vmIntrinsics::_getSuperclass: |
| case vmIntrinsics::_getComponentType: |
| case vmIntrinsics::_getClassAccessFlags: |
| return inline_native_Class_query(intrinsic_id()); |
| |
| case vmIntrinsics::_floatToRawIntBits: |
| case vmIntrinsics::_floatToIntBits: |
| case vmIntrinsics::_intBitsToFloat: |
| case vmIntrinsics::_doubleToRawLongBits: |
| case vmIntrinsics::_doubleToLongBits: |
| case vmIntrinsics::_longBitsToDouble: |
| return inline_fp_conversions(intrinsic_id()); |
| |
| case vmIntrinsics::_numberOfLeadingZeros_i: |
| case vmIntrinsics::_numberOfLeadingZeros_l: |
| return inline_numberOfLeadingZeros(intrinsic_id()); |
| |
| case vmIntrinsics::_numberOfTrailingZeros_i: |
| case vmIntrinsics::_numberOfTrailingZeros_l: |
| return inline_numberOfTrailingZeros(intrinsic_id()); |
| |
| case vmIntrinsics::_bitCount_i: |
| case vmIntrinsics::_bitCount_l: |
| return inline_bitCount(intrinsic_id()); |
| |
| case vmIntrinsics::_reverseBytes_i: |
| case vmIntrinsics::_reverseBytes_l: |
| case vmIntrinsics::_reverseBytes_s: |
| case vmIntrinsics::_reverseBytes_c: |
| return inline_reverseBytes((vmIntrinsics::ID) intrinsic_id()); |
| |
| case vmIntrinsics::_get_AtomicLong: |
| return inline_native_AtomicLong_get(); |
| case vmIntrinsics::_attemptUpdate: |
| return inline_native_AtomicLong_attemptUpdate(); |
| |
| case vmIntrinsics::_getCallerClass: |
| return inline_native_Reflection_getCallerClass(); |
| |
| case vmIntrinsics::_Reference_get: |
| return inline_reference_get(); |
| |
| default: |
| // If you get here, it may be that someone has added a new intrinsic |
| // to the list in vmSymbols.hpp without implementing it here. |
| #ifndef PRODUCT |
| if ((PrintMiscellaneous && (Verbose || WizardMode)) || PrintOpto) { |
| tty->print_cr("*** Warning: Unimplemented intrinsic %s(%d)", |
| vmIntrinsics::name_at(intrinsic_id()), intrinsic_id()); |
| } |
| #endif |
| return false; |
| } |
| } |
| |
| //------------------------------push_result------------------------------ |
| // Helper function for finishing intrinsics. |
| void LibraryCallKit::push_result(RegionNode* region, PhiNode* value) { |
| record_for_igvn(region); |
| set_control(_gvn.transform(region)); |
| BasicType value_type = value->type()->basic_type(); |
| push_node(value_type, _gvn.transform(value)); |
| } |
| |
| //------------------------------generate_guard--------------------------- |
| // Helper function for generating guarded fast-slow graph structures. |
| // The given 'test', if true, guards a slow path. If the test fails |
| // then a fast path can be taken. (We generally hope it fails.) |
| // In all cases, GraphKit::control() is updated to the fast path. |
| // The returned value represents the control for the slow path. |
| // The return value is never 'top'; it is either a valid control |
| // or NULL if it is obvious that the slow path can never be taken. |
| // Also, if region and the slow control are not NULL, the slow edge |
| // is appended to the region. |
| Node* LibraryCallKit::generate_guard(Node* test, RegionNode* region, float true_prob) { |
| if (stopped()) { |
| // Already short circuited. |
| return NULL; |
| } |
| |
| // Build an if node and its projections. |
| // If test is true we take the slow path, which we assume is uncommon. |
| if (_gvn.type(test) == TypeInt::ZERO) { |
| // The slow branch is never taken. No need to build this guard. |
| return NULL; |
| } |
| |
| IfNode* iff = create_and_map_if(control(), test, true_prob, COUNT_UNKNOWN); |
| |
| Node* if_slow = _gvn.transform( new (C, 1) IfTrueNode(iff) ); |
| if (if_slow == top()) { |
| // The slow branch is never taken. No need to build this guard. |
| return NULL; |
| } |
| |
| if (region != NULL) |
| region->add_req(if_slow); |
| |
| Node* if_fast = _gvn.transform( new (C, 1) IfFalseNode(iff) ); |
| set_control(if_fast); |
| |
| return if_slow; |
| } |
| |
| inline Node* LibraryCallKit::generate_slow_guard(Node* test, RegionNode* region) { |
| return generate_guard(test, region, PROB_UNLIKELY_MAG(3)); |
| } |
| inline Node* LibraryCallKit::generate_fair_guard(Node* test, RegionNode* region) { |
| return generate_guard(test, region, PROB_FAIR); |
| } |
| |
| inline Node* LibraryCallKit::generate_negative_guard(Node* index, RegionNode* region, |
| Node* *pos_index) { |
| if (stopped()) |
| return NULL; // already stopped |
| if (_gvn.type(index)->higher_equal(TypeInt::POS)) // [0,maxint] |
| return NULL; // index is already adequately typed |
| Node* cmp_lt = _gvn.transform( new (C, 3) CmpINode(index, intcon(0)) ); |
| Node* bol_lt = _gvn.transform( new (C, 2) BoolNode(cmp_lt, BoolTest::lt) ); |
| Node* is_neg = generate_guard(bol_lt, region, PROB_MIN); |
| if (is_neg != NULL && pos_index != NULL) { |
| // Emulate effect of Parse::adjust_map_after_if. |
| Node* ccast = new (C, 2) CastIINode(index, TypeInt::POS); |
| ccast->set_req(0, control()); |
| (*pos_index) = _gvn.transform(ccast); |
| } |
| return is_neg; |
| } |
| |
| inline Node* LibraryCallKit::generate_nonpositive_guard(Node* index, bool never_negative, |
| Node* *pos_index) { |
| if (stopped()) |
| return NULL; // already stopped |
| if (_gvn.type(index)->higher_equal(TypeInt::POS1)) // [1,maxint] |
| return NULL; // index is already adequately typed |
| Node* cmp_le = _gvn.transform( new (C, 3) CmpINode(index, intcon(0)) ); |
| BoolTest::mask le_or_eq = (never_negative ? BoolTest::eq : BoolTest::le); |
| Node* bol_le = _gvn.transform( new (C, 2) BoolNode(cmp_le, le_or_eq) ); |
| Node* is_notp = generate_guard(bol_le, NULL, PROB_MIN); |
| if (is_notp != NULL && pos_index != NULL) { |
| // Emulate effect of Parse::adjust_map_after_if. |
| Node* ccast = new (C, 2) CastIINode(index, TypeInt::POS1); |
| ccast->set_req(0, control()); |
| (*pos_index) = _gvn.transform(ccast); |
| } |
| return is_notp; |
| } |
| |
| // Make sure that 'position' is a valid limit index, in [0..length]. |
| // There are two equivalent plans for checking this: |
| // A. (offset + copyLength) unsigned<= arrayLength |
| // B. offset <= (arrayLength - copyLength) |
| // We require that all of the values above, except for the sum and |
| // difference, are already known to be non-negative. |
| // Plan A is robust in the face of overflow, if offset and copyLength |
| // are both hugely positive. |
| // |
| // Plan B is less direct and intuitive, but it does not overflow at |
| // all, since the difference of two non-negatives is always |
| // representable. Whenever Java methods must perform the equivalent |
| // check they generally use Plan B instead of Plan A. |
| // For the moment we use Plan A. |
| inline Node* LibraryCallKit::generate_limit_guard(Node* offset, |
| Node* subseq_length, |
| Node* array_length, |
| RegionNode* region) { |
| if (stopped()) |
| return NULL; // already stopped |
| bool zero_offset = _gvn.type(offset) == TypeInt::ZERO; |
| if (zero_offset && subseq_length->eqv_uncast(array_length)) |
| return NULL; // common case of whole-array copy |
| Node* last = subseq_length; |
| if (!zero_offset) // last += offset |
| last = _gvn.transform( new (C, 3) AddINode(last, offset)); |
| Node* cmp_lt = _gvn.transform( new (C, 3) CmpUNode(array_length, last) ); |
| Node* bol_lt = _gvn.transform( new (C, 2) BoolNode(cmp_lt, BoolTest::lt) ); |
| Node* is_over = generate_guard(bol_lt, region, PROB_MIN); |
| return is_over; |
| } |
| |
| |
| //--------------------------generate_current_thread-------------------- |
| Node* LibraryCallKit::generate_current_thread(Node* &tls_output) { |
| ciKlass* thread_klass = env()->Thread_klass(); |
| const Type* thread_type = TypeOopPtr::make_from_klass(thread_klass)->cast_to_ptr_type(TypePtr::NotNull); |
| Node* thread = _gvn.transform(new (C, 1) ThreadLocalNode()); |
| Node* p = basic_plus_adr(top()/*!oop*/, thread, in_bytes(JavaThread::threadObj_offset())); |
| Node* threadObj = make_load(NULL, p, thread_type, T_OBJECT); |
| tls_output = thread; |
| return threadObj; |
| } |
| |
| |
| //------------------------------make_string_method_node------------------------ |
| // Helper method for String intrinsic functions. This version is called |
| // with str1 and str2 pointing to String object nodes. |
| // |
| Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1, Node* str2) { |
| Node* no_ctrl = NULL; |
| |
| // Get start addr of string |
| Node* str1_value = load_String_value(no_ctrl, str1); |
| Node* str1_offset = load_String_offset(no_ctrl, str1); |
| Node* str1_start = array_element_address(str1_value, str1_offset, T_CHAR); |
| |
| // Get length of string 1 |
| Node* str1_len = load_String_length(no_ctrl, str1); |
| |
| Node* str2_value = load_String_value(no_ctrl, str2); |
| Node* str2_offset = load_String_offset(no_ctrl, str2); |
| Node* str2_start = array_element_address(str2_value, str2_offset, T_CHAR); |
| |
| Node* str2_len = NULL; |
| Node* result = NULL; |
| |
| switch (opcode) { |
| case Op_StrIndexOf: |
| // Get length of string 2 |
| str2_len = load_String_length(no_ctrl, str2); |
| |
| result = new (C, 6) StrIndexOfNode(control(), memory(TypeAryPtr::CHARS), |
| str1_start, str1_len, str2_start, str2_len); |
| break; |
| case Op_StrComp: |
| // Get length of string 2 |
| str2_len = load_String_length(no_ctrl, str2); |
| |
| result = new (C, 6) StrCompNode(control(), memory(TypeAryPtr::CHARS), |
| str1_start, str1_len, str2_start, str2_len); |
| break; |
| case Op_StrEquals: |
| result = new (C, 5) StrEqualsNode(control(), memory(TypeAryPtr::CHARS), |
| str1_start, str2_start, str1_len); |
| break; |
| default: |
| ShouldNotReachHere(); |
| return NULL; |
| } |
| |
| // All these intrinsics have checks. |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| return _gvn.transform(result); |
| } |
| |
| // Helper method for String intrinsic functions. This version is called |
| // with str1 and str2 pointing to char[] nodes, with cnt1 and cnt2 pointing |
| // to Int nodes containing the lenghts of str1 and str2. |
| // |
| Node* LibraryCallKit::make_string_method_node(int opcode, Node* str1_start, Node* cnt1, Node* str2_start, Node* cnt2) { |
| |
| Node* result = NULL; |
| switch (opcode) { |
| case Op_StrIndexOf: |
| result = new (C, 6) StrIndexOfNode(control(), memory(TypeAryPtr::CHARS), |
| str1_start, cnt1, str2_start, cnt2); |
| break; |
| case Op_StrComp: |
| result = new (C, 6) StrCompNode(control(), memory(TypeAryPtr::CHARS), |
| str1_start, cnt1, str2_start, cnt2); |
| break; |
| case Op_StrEquals: |
| result = new (C, 5) StrEqualsNode(control(), memory(TypeAryPtr::CHARS), |
| str1_start, str2_start, cnt1); |
| break; |
| default: |
| ShouldNotReachHere(); |
| return NULL; |
| } |
| |
| // All these intrinsics have checks. |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| return _gvn.transform(result); |
| } |
| |
| //------------------------------inline_string_compareTo------------------------ |
| bool LibraryCallKit::inline_string_compareTo() { |
| |
| if (!Matcher::has_match_rule(Op_StrComp)) return false; |
| |
| _sp += 2; |
| Node *argument = pop(); // pop non-receiver first: it was pushed second |
| Node *receiver = pop(); |
| |
| // Null check on self without removing any arguments. The argument |
| // null check technically happens in the wrong place, which can lead to |
| // invalid stack traces when string compare is inlined into a method |
| // which handles NullPointerExceptions. |
| _sp += 2; |
| receiver = do_null_check(receiver, T_OBJECT); |
| argument = do_null_check(argument, T_OBJECT); |
| _sp -= 2; |
| if (stopped()) { |
| return true; |
| } |
| |
| Node* compare = make_string_method_node(Op_StrComp, receiver, argument); |
| push(compare); |
| return true; |
| } |
| |
| //------------------------------inline_string_equals------------------------ |
| bool LibraryCallKit::inline_string_equals() { |
| |
| if (!Matcher::has_match_rule(Op_StrEquals)) return false; |
| |
| int nargs = 2; |
| _sp += nargs; |
| Node* argument = pop(); // pop non-receiver first: it was pushed second |
| Node* receiver = pop(); |
| |
| // Null check on self without removing any arguments. The argument |
| // null check technically happens in the wrong place, which can lead to |
| // invalid stack traces when string compare is inlined into a method |
| // which handles NullPointerExceptions. |
| _sp += nargs; |
| receiver = do_null_check(receiver, T_OBJECT); |
| //should not do null check for argument for String.equals(), because spec |
| //allows to specify NULL as argument. |
| _sp -= nargs; |
| |
| if (stopped()) { |
| return true; |
| } |
| |
| // paths (plus control) merge |
| RegionNode* region = new (C, 5) RegionNode(5); |
| Node* phi = new (C, 5) PhiNode(region, TypeInt::BOOL); |
| |
| // does source == target string? |
| Node* cmp = _gvn.transform(new (C, 3) CmpPNode(receiver, argument)); |
| Node* bol = _gvn.transform(new (C, 2) BoolNode(cmp, BoolTest::eq)); |
| |
| Node* if_eq = generate_slow_guard(bol, NULL); |
| if (if_eq != NULL) { |
| // receiver == argument |
| phi->init_req(2, intcon(1)); |
| region->init_req(2, if_eq); |
| } |
| |
| // get String klass for instanceOf |
| ciInstanceKlass* klass = env()->String_klass(); |
| |
| if (!stopped()) { |
| _sp += nargs; // gen_instanceof might do an uncommon trap |
| Node* inst = gen_instanceof(argument, makecon(TypeKlassPtr::make(klass))); |
| _sp -= nargs; |
| Node* cmp = _gvn.transform(new (C, 3) CmpINode(inst, intcon(1))); |
| Node* bol = _gvn.transform(new (C, 2) BoolNode(cmp, BoolTest::ne)); |
| |
| Node* inst_false = generate_guard(bol, NULL, PROB_MIN); |
| //instanceOf == true, fallthrough |
| |
| if (inst_false != NULL) { |
| phi->init_req(3, intcon(0)); |
| region->init_req(3, inst_false); |
| } |
| } |
| |
| if (!stopped()) { |
| const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(klass); |
| |
| // Properly cast the argument to String |
| argument = _gvn.transform(new (C, 2) CheckCastPPNode(control(), argument, string_type)); |
| // This path is taken only when argument's type is String:NotNull. |
| argument = cast_not_null(argument, false); |
| |
| Node* no_ctrl = NULL; |
| |
| // Get start addr of receiver |
| Node* receiver_val = load_String_value(no_ctrl, receiver); |
| Node* receiver_offset = load_String_offset(no_ctrl, receiver); |
| Node* receiver_start = array_element_address(receiver_val, receiver_offset, T_CHAR); |
| |
| // Get length of receiver |
| Node* receiver_cnt = load_String_length(no_ctrl, receiver); |
| |
| // Get start addr of argument |
| Node* argument_val = load_String_value(no_ctrl, argument); |
| Node* argument_offset = load_String_offset(no_ctrl, argument); |
| Node* argument_start = array_element_address(argument_val, argument_offset, T_CHAR); |
| |
| // Get length of argument |
| Node* argument_cnt = load_String_length(no_ctrl, argument); |
| |
| // Check for receiver count != argument count |
| Node* cmp = _gvn.transform( new(C, 3) CmpINode(receiver_cnt, argument_cnt) ); |
| Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::ne) ); |
| Node* if_ne = generate_slow_guard(bol, NULL); |
| if (if_ne != NULL) { |
| phi->init_req(4, intcon(0)); |
| region->init_req(4, if_ne); |
| } |
| |
| // Check for count == 0 is done by assembler code for StrEquals. |
| |
| if (!stopped()) { |
| Node* equals = make_string_method_node(Op_StrEquals, receiver_start, receiver_cnt, argument_start, argument_cnt); |
| phi->init_req(1, equals); |
| region->init_req(1, control()); |
| } |
| } |
| |
| // post merge |
| set_control(_gvn.transform(region)); |
| record_for_igvn(region); |
| |
| push(_gvn.transform(phi)); |
| |
| return true; |
| } |
| |
| //------------------------------inline_array_equals---------------------------- |
| bool LibraryCallKit::inline_array_equals() { |
| |
| if (!Matcher::has_match_rule(Op_AryEq)) return false; |
| |
| _sp += 2; |
| Node *argument2 = pop(); |
| Node *argument1 = pop(); |
| |
| Node* equals = |
| _gvn.transform(new (C, 4) AryEqNode(control(), memory(TypeAryPtr::CHARS), |
| argument1, argument2) ); |
| push(equals); |
| return true; |
| } |
| |
| // Java version of String.indexOf(constant string) |
| // class StringDecl { |
| // StringDecl(char[] ca) { |
| // offset = 0; |
| // count = ca.length; |
| // value = ca; |
| // } |
| // int offset; |
| // int count; |
| // char[] value; |
| // } |
| // |
| // static int string_indexOf_J(StringDecl string_object, char[] target_object, |
| // int targetOffset, int cache_i, int md2) { |
| // int cache = cache_i; |
| // int sourceOffset = string_object.offset; |
| // int sourceCount = string_object.count; |
| // int targetCount = target_object.length; |
| // |
| // int targetCountLess1 = targetCount - 1; |
| // int sourceEnd = sourceOffset + sourceCount - targetCountLess1; |
| // |
| // char[] source = string_object.value; |
| // char[] target = target_object; |
| // int lastChar = target[targetCountLess1]; |
| // |
| // outer_loop: |
| // for (int i = sourceOffset; i < sourceEnd; ) { |
| // int src = source[i + targetCountLess1]; |
| // if (src == lastChar) { |
| // // With random strings and a 4-character alphabet, |
| // // reverse matching at this point sets up 0.8% fewer |
| // // frames, but (paradoxically) makes 0.3% more probes. |
| // // Since those probes are nearer the lastChar probe, |
| // // there is may be a net D$ win with reverse matching. |
| // // But, reversing loop inhibits unroll of inner loop |
| // // for unknown reason. So, does running outer loop from |
| // // (sourceOffset - targetCountLess1) to (sourceOffset + sourceCount) |
| // for (int j = 0; j < targetCountLess1; j++) { |
| // if (target[targetOffset + j] != source[i+j]) { |
| // if ((cache & (1 << source[i+j])) == 0) { |
| // if (md2 < j+1) { |
| // i += j+1; |
| // continue outer_loop; |
| // } |
| // } |
| // i += md2; |
| // continue outer_loop; |
| // } |
| // } |
| // return i - sourceOffset; |
| // } |
| // if ((cache & (1 << src)) == 0) { |
| // i += targetCountLess1; |
| // } // using "i += targetCount;" and an "else i++;" causes a jump to jump. |
| // i++; |
| // } |
| // return -1; |
| // } |
| |
| //------------------------------string_indexOf------------------------ |
| Node* LibraryCallKit::string_indexOf(Node* string_object, ciTypeArray* target_array, jint targetOffset_i, |
| jint cache_i, jint md2_i) { |
| |
| Node* no_ctrl = NULL; |
| float likely = PROB_LIKELY(0.9); |
| float unlikely = PROB_UNLIKELY(0.9); |
| |
| const int nargs = 2; // number of arguments to push back for uncommon trap in predicate |
| |
| Node* source = load_String_value(no_ctrl, string_object); |
| Node* sourceOffset = load_String_offset(no_ctrl, string_object); |
| Node* sourceCount = load_String_length(no_ctrl, string_object); |
| |
| Node* target = _gvn.transform( makecon(TypeOopPtr::make_from_constant(target_array, true)) ); |
| jint target_length = target_array->length(); |
| const TypeAry* target_array_type = TypeAry::make(TypeInt::CHAR, TypeInt::make(0, target_length, Type::WidenMin)); |
| const TypeAryPtr* target_type = TypeAryPtr::make(TypePtr::BotPTR, target_array_type, target_array->klass(), true, Type::OffsetBot); |
| |
| IdealKit kit(this, false, true); |
| #define __ kit. |
| Node* zero = __ ConI(0); |
| Node* one = __ ConI(1); |
| Node* cache = __ ConI(cache_i); |
| Node* md2 = __ ConI(md2_i); |
| Node* lastChar = __ ConI(target_array->char_at(target_length - 1)); |
| Node* targetCount = __ ConI(target_length); |
| Node* targetCountLess1 = __ ConI(target_length - 1); |
| Node* targetOffset = __ ConI(targetOffset_i); |
| Node* sourceEnd = __ SubI(__ AddI(sourceOffset, sourceCount), targetCountLess1); |
| |
| IdealVariable rtn(kit), i(kit), j(kit); __ declarations_done(); |
| Node* outer_loop = __ make_label(2 /* goto */); |
| Node* return_ = __ make_label(1); |
| |
| __ set(rtn,__ ConI(-1)); |
| __ loop(this, nargs, i, sourceOffset, BoolTest::lt, sourceEnd); { |
| Node* i2 = __ AddI(__ value(i), targetCountLess1); |
| // pin to prohibit loading of "next iteration" value which may SEGV (rare) |
| Node* src = load_array_element(__ ctrl(), source, i2, TypeAryPtr::CHARS); |
| __ if_then(src, BoolTest::eq, lastChar, unlikely); { |
| __ loop(this, nargs, j, zero, BoolTest::lt, targetCountLess1); { |
| Node* tpj = __ AddI(targetOffset, __ value(j)); |
| Node* targ = load_array_element(no_ctrl, target, tpj, target_type); |
| Node* ipj = __ AddI(__ value(i), __ value(j)); |
| Node* src2 = load_array_element(no_ctrl, source, ipj, TypeAryPtr::CHARS); |
| __ if_then(targ, BoolTest::ne, src2); { |
| __ if_then(__ AndI(cache, __ LShiftI(one, src2)), BoolTest::eq, zero); { |
| __ if_then(md2, BoolTest::lt, __ AddI(__ value(j), one)); { |
| __ increment(i, __ AddI(__ value(j), one)); |
| __ goto_(outer_loop); |
| } __ end_if(); __ dead(j); |
| }__ end_if(); __ dead(j); |
| __ increment(i, md2); |
| __ goto_(outer_loop); |
| }__ end_if(); |
| __ increment(j, one); |
| }__ end_loop(); __ dead(j); |
| __ set(rtn, __ SubI(__ value(i), sourceOffset)); __ dead(i); |
| __ goto_(return_); |
| }__ end_if(); |
| __ if_then(__ AndI(cache, __ LShiftI(one, src)), BoolTest::eq, zero, likely); { |
| __ increment(i, targetCountLess1); |
| }__ end_if(); |
| __ increment(i, one); |
| __ bind(outer_loop); |
| }__ end_loop(); __ dead(i); |
| __ bind(return_); |
| |
| // Final sync IdealKit and GraphKit. |
| final_sync(kit); |
| Node* result = __ value(rtn); |
| #undef __ |
| C->set_has_loops(true); |
| return result; |
| } |
| |
| //------------------------------inline_string_indexOf------------------------ |
| bool LibraryCallKit::inline_string_indexOf() { |
| |
| _sp += 2; |
| Node *argument = pop(); // pop non-receiver first: it was pushed second |
| Node *receiver = pop(); |
| |
| Node* result; |
| // Disable the use of pcmpestri until it can be guaranteed that |
| // the load doesn't cross into the uncommited space. |
| if (Matcher::has_match_rule(Op_StrIndexOf) && |
| UseSSE42Intrinsics) { |
| // Generate SSE4.2 version of indexOf |
| // We currently only have match rules that use SSE4.2 |
| |
| // Null check on self without removing any arguments. The argument |
| // null check technically happens in the wrong place, which can lead to |
| // invalid stack traces when string compare is inlined into a method |
| // which handles NullPointerExceptions. |
| _sp += 2; |
| receiver = do_null_check(receiver, T_OBJECT); |
| argument = do_null_check(argument, T_OBJECT); |
| _sp -= 2; |
| |
| if (stopped()) { |
| return true; |
| } |
| |
| ciInstanceKlass* str_klass = env()->String_klass(); |
| const TypeOopPtr* string_type = TypeOopPtr::make_from_klass(str_klass); |
| |
| // Make the merge point |
| RegionNode* result_rgn = new (C, 4) RegionNode(4); |
| Node* result_phi = new (C, 4) PhiNode(result_rgn, TypeInt::INT); |
| Node* no_ctrl = NULL; |
| |
| // Get start addr of source string |
| Node* source = load_String_value(no_ctrl, receiver); |
| Node* source_offset = load_String_offset(no_ctrl, receiver); |
| Node* source_start = array_element_address(source, source_offset, T_CHAR); |
| |
| // Get length of source string |
| Node* source_cnt = load_String_length(no_ctrl, receiver); |
| |
| // Get start addr of substring |
| Node* substr = load_String_value(no_ctrl, argument); |
| Node* substr_offset = load_String_offset(no_ctrl, argument); |
| Node* substr_start = array_element_address(substr, substr_offset, T_CHAR); |
| |
| // Get length of source string |
| Node* substr_cnt = load_String_length(no_ctrl, argument); |
| |
| // Check for substr count > string count |
| Node* cmp = _gvn.transform( new(C, 3) CmpINode(substr_cnt, source_cnt) ); |
| Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::gt) ); |
| Node* if_gt = generate_slow_guard(bol, NULL); |
| if (if_gt != NULL) { |
| result_phi->init_req(2, intcon(-1)); |
| result_rgn->init_req(2, if_gt); |
| } |
| |
| if (!stopped()) { |
| // Check for substr count == 0 |
| cmp = _gvn.transform( new(C, 3) CmpINode(substr_cnt, intcon(0)) ); |
| bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::eq) ); |
| Node* if_zero = generate_slow_guard(bol, NULL); |
| if (if_zero != NULL) { |
| result_phi->init_req(3, intcon(0)); |
| result_rgn->init_req(3, if_zero); |
| } |
| } |
| |
| if (!stopped()) { |
| result = make_string_method_node(Op_StrIndexOf, source_start, source_cnt, substr_start, substr_cnt); |
| result_phi->init_req(1, result); |
| result_rgn->init_req(1, control()); |
| } |
| set_control(_gvn.transform(result_rgn)); |
| record_for_igvn(result_rgn); |
| result = _gvn.transform(result_phi); |
| |
| } else { // Use LibraryCallKit::string_indexOf |
| // don't intrinsify if argument isn't a constant string. |
| if (!argument->is_Con()) { |
| return false; |
| } |
| const TypeOopPtr* str_type = _gvn.type(argument)->isa_oopptr(); |
| if (str_type == NULL) { |
| return false; |
| } |
| ciInstanceKlass* klass = env()->String_klass(); |
| ciObject* str_const = str_type->const_oop(); |
| if (str_const == NULL || str_const->klass() != klass) { |
| return false; |
| } |
| ciInstance* str = str_const->as_instance(); |
| assert(str != NULL, "must be instance"); |
| |
| ciObject* v = str->field_value_by_offset(java_lang_String::value_offset_in_bytes()).as_object(); |
| ciTypeArray* pat = v->as_type_array(); // pattern (argument) character array |
| |
| int o; |
| int c; |
| if (java_lang_String::has_offset_field()) { |
| o = str->field_value_by_offset(java_lang_String::offset_offset_in_bytes()).as_int(); |
| c = str->field_value_by_offset(java_lang_String::count_offset_in_bytes()).as_int(); |
| } else { |
| o = 0; |
| c = pat->length(); |
| } |
| |
| // constant strings have no offset and count == length which |
| // simplifies the resulting code somewhat so lets optimize for that. |
| if (o != 0 || c != pat->length()) { |
| return false; |
| } |
| |
| // Null check on self without removing any arguments. The argument |
| // null check technically happens in the wrong place, which can lead to |
| // invalid stack traces when string compare is inlined into a method |
| // which handles NullPointerExceptions. |
| _sp += 2; |
| receiver = do_null_check(receiver, T_OBJECT); |
| // No null check on the argument is needed since it's a constant String oop. |
| _sp -= 2; |
| if (stopped()) { |
| return true; |
| } |
| |
| // The null string as a pattern always returns 0 (match at beginning of string) |
| if (c == 0) { |
| push(intcon(0)); |
| return true; |
| } |
| |
| // Generate default indexOf |
| jchar lastChar = pat->char_at(o + (c - 1)); |
| int cache = 0; |
| int i; |
| for (i = 0; i < c - 1; i++) { |
| assert(i < pat->length(), "out of range"); |
| cache |= (1 << (pat->char_at(o + i) & (sizeof(cache) * BitsPerByte - 1))); |
| } |
| |
| int md2 = c; |
| for (i = 0; i < c - 1; i++) { |
| assert(i < pat->length(), "out of range"); |
| if (pat->char_at(o + i) == lastChar) { |
| md2 = (c - 1) - i; |
| } |
| } |
| |
| result = string_indexOf(receiver, pat, o, cache, md2); |
| } |
| |
| push(result); |
| return true; |
| } |
| |
| //--------------------------pop_math_arg-------------------------------- |
| // Pop a double argument to a math function from the stack |
| // rounding it if necessary. |
| Node * LibraryCallKit::pop_math_arg() { |
| Node *arg = pop_pair(); |
| if( Matcher::strict_fp_requires_explicit_rounding && UseSSE<=1 ) |
| arg = _gvn.transform( new (C, 2) RoundDoubleNode(0, arg) ); |
| return arg; |
| } |
| |
| //------------------------------inline_trig---------------------------------- |
| // Inline sin/cos/tan instructions, if possible. If rounding is required, do |
| // argument reduction which will turn into a fast/slow diamond. |
| bool LibraryCallKit::inline_trig(vmIntrinsics::ID id) { |
| _sp += arg_size(); // restore stack pointer |
| Node* arg = pop_math_arg(); |
| Node* trig = NULL; |
| |
| switch (id) { |
| case vmIntrinsics::_dsin: |
| trig = _gvn.transform((Node*)new (C, 2) SinDNode(arg)); |
| break; |
| case vmIntrinsics::_dcos: |
| trig = _gvn.transform((Node*)new (C, 2) CosDNode(arg)); |
| break; |
| case vmIntrinsics::_dtan: |
| trig = _gvn.transform((Node*)new (C, 2) TanDNode(arg)); |
| break; |
| default: |
| assert(false, "bad intrinsic was passed in"); |
| return false; |
| } |
| |
| // Rounding required? Check for argument reduction! |
| if( Matcher::strict_fp_requires_explicit_rounding ) { |
| |
| static const double pi_4 = 0.7853981633974483; |
| static const double neg_pi_4 = -0.7853981633974483; |
| // pi/2 in 80-bit extended precision |
| // static const unsigned char pi_2_bits_x[] = {0x35,0xc2,0x68,0x21,0xa2,0xda,0x0f,0xc9,0xff,0x3f,0x00,0x00,0x00,0x00,0x00,0x00}; |
| // -pi/2 in 80-bit extended precision |
| // static const unsigned char neg_pi_2_bits_x[] = {0x35,0xc2,0x68,0x21,0xa2,0xda,0x0f,0xc9,0xff,0xbf,0x00,0x00,0x00,0x00,0x00,0x00}; |
| // Cutoff value for using this argument reduction technique |
| //static const double pi_2_minus_epsilon = 1.564660403643354; |
| //static const double neg_pi_2_plus_epsilon = -1.564660403643354; |
| |
| // Pseudocode for sin: |
| // if (x <= Math.PI / 4.0) { |
| // if (x >= -Math.PI / 4.0) return fsin(x); |
| // if (x >= -Math.PI / 2.0) return -fcos(x + Math.PI / 2.0); |
| // } else { |
| // if (x <= Math.PI / 2.0) return fcos(x - Math.PI / 2.0); |
| // } |
| // return StrictMath.sin(x); |
| |
| // Pseudocode for cos: |
| // if (x <= Math.PI / 4.0) { |
| // if (x >= -Math.PI / 4.0) return fcos(x); |
| // if (x >= -Math.PI / 2.0) return fsin(x + Math.PI / 2.0); |
| // } else { |
| // if (x <= Math.PI / 2.0) return -fsin(x - Math.PI / 2.0); |
| // } |
| // return StrictMath.cos(x); |
| |
| // Actually, sticking in an 80-bit Intel value into C2 will be tough; it |
| // requires a special machine instruction to load it. Instead we'll try |
| // the 'easy' case. If we really need the extra range +/- PI/2 we'll |
| // probably do the math inside the SIN encoding. |
| |
| // Make the merge point |
| RegionNode *r = new (C, 3) RegionNode(3); |
| Node *phi = new (C, 3) PhiNode(r,Type::DOUBLE); |
| |
| // Flatten arg so we need only 1 test |
| Node *abs = _gvn.transform(new (C, 2) AbsDNode(arg)); |
| // Node for PI/4 constant |
| Node *pi4 = makecon(TypeD::make(pi_4)); |
| // Check PI/4 : abs(arg) |
| Node *cmp = _gvn.transform(new (C, 3) CmpDNode(pi4,abs)); |
| // Check: If PI/4 < abs(arg) then go slow |
| Node *bol = _gvn.transform( new (C, 2) BoolNode( cmp, BoolTest::lt ) ); |
| // Branch either way |
| IfNode *iff = create_and_xform_if(control(),bol, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); |
| set_control(opt_iff(r,iff)); |
| |
| // Set fast path result |
| phi->init_req(2,trig); |
| |
| // Slow path - non-blocking leaf call |
| Node* call = NULL; |
| switch (id) { |
| case vmIntrinsics::_dsin: |
| call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), |
| CAST_FROM_FN_PTR(address, SharedRuntime::dsin), |
| "Sin", NULL, arg, top()); |
| break; |
| case vmIntrinsics::_dcos: |
| call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), |
| CAST_FROM_FN_PTR(address, SharedRuntime::dcos), |
| "Cos", NULL, arg, top()); |
| break; |
| case vmIntrinsics::_dtan: |
| call = make_runtime_call(RC_LEAF, OptoRuntime::Math_D_D_Type(), |
| CAST_FROM_FN_PTR(address, SharedRuntime::dtan), |
| "Tan", NULL, arg, top()); |
| break; |
| } |
| assert(control()->in(0) == call, ""); |
| Node* slow_result = _gvn.transform(new (C, 1) ProjNode(call,TypeFunc::Parms)); |
| r->init_req(1,control()); |
| phi->init_req(1,slow_result); |
| |
| // Post-merge |
| set_control(_gvn.transform(r)); |
| record_for_igvn(r); |
| trig = _gvn.transform(phi); |
| |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| } |
| // Push result back on JVM stack |
| push_pair(trig); |
| return true; |
| } |
| |
| //------------------------------inline_sqrt------------------------------------- |
| // Inline square root instruction, if possible. |
| bool LibraryCallKit::inline_sqrt(vmIntrinsics::ID id) { |
| assert(id == vmIntrinsics::_dsqrt, "Not square root"); |
| _sp += arg_size(); // restore stack pointer |
| push_pair(_gvn.transform(new (C, 2) SqrtDNode(0, pop_math_arg()))); |
| return true; |
| } |
| |
| //------------------------------inline_abs------------------------------------- |
| // Inline absolute value instruction, if possible. |
| bool LibraryCallKit::inline_abs(vmIntrinsics::ID id) { |
| assert(id == vmIntrinsics::_dabs, "Not absolute value"); |
| _sp += arg_size(); // restore stack pointer |
| push_pair(_gvn.transform(new (C, 2) AbsDNode(pop_math_arg()))); |
| return true; |
| } |
| |
| //------------------------------inline_exp------------------------------------- |
| // Inline exp instructions, if possible. The Intel hardware only misses |
| // really odd corner cases (+/- Infinity). Just uncommon-trap them. |
| bool LibraryCallKit::inline_exp(vmIntrinsics::ID id) { |
| assert(id == vmIntrinsics::_dexp, "Not exp"); |
| |
| // If this inlining ever returned NaN in the past, we do not intrinsify it |
| // every again. NaN results requires StrictMath.exp handling. |
| if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; |
| |
| // Do not intrinsify on older platforms which lack cmove. |
| if (ConditionalMoveLimit == 0) return false; |
| |
| _sp += arg_size(); // restore stack pointer |
| Node *x = pop_math_arg(); |
| Node *result = _gvn.transform(new (C, 2) ExpDNode(0,x)); |
| |
| //------------------- |
| //result=(result.isNaN())? StrictMath::exp():result; |
| // Check: If isNaN() by checking result!=result? then go to Strict Math |
| Node* cmpisnan = _gvn.transform(new (C, 3) CmpDNode(result,result)); |
| // Build the boolean node |
| Node* bolisnum = _gvn.transform( new (C, 2) BoolNode(cmpisnan, BoolTest::eq) ); |
| |
| { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT); |
| // End the current control-flow path |
| push_pair(x); |
| // Math.exp intrinsic returned a NaN, which requires StrictMath.exp |
| // to handle. Recompile without intrinsifying Math.exp |
| uncommon_trap(Deoptimization::Reason_intrinsic, |
| Deoptimization::Action_make_not_entrant); |
| } |
| |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| push_pair(result); |
| |
| return true; |
| } |
| |
| //------------------------------inline_pow------------------------------------- |
| // Inline power instructions, if possible. |
| bool LibraryCallKit::inline_pow(vmIntrinsics::ID id) { |
| assert(id == vmIntrinsics::_dpow, "Not pow"); |
| |
| // If this inlining ever returned NaN in the past, we do not intrinsify it |
| // every again. NaN results requires StrictMath.pow handling. |
| if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; |
| |
| // Do not intrinsify on older platforms which lack cmove. |
| if (ConditionalMoveLimit == 0) return false; |
| |
| // Pseudocode for pow |
| // if (x <= 0.0) { |
| // if ((double)((int)y)==y) { // if y is int |
| // result = ((1&(int)y)==0)?-DPow(abs(x), y):DPow(abs(x), y) |
| // } else { |
| // result = NaN; |
| // } |
| // } else { |
| // result = DPow(x,y); |
| // } |
| // if (result != result)? { |
| // uncommon_trap(); |
| // } |
| // return result; |
| |
| _sp += arg_size(); // restore stack pointer |
| Node* y = pop_math_arg(); |
| Node* x = pop_math_arg(); |
| |
| Node *fast_result = _gvn.transform( new (C, 3) PowDNode(0, x, y) ); |
| |
| // Short form: if not top-level (i.e., Math.pow but inlining Math.pow |
| // inside of something) then skip the fancy tests and just check for |
| // NaN result. |
| Node *result = NULL; |
| if( jvms()->depth() >= 1 ) { |
| result = fast_result; |
| } else { |
| |
| // Set the merge point for If node with condition of (x <= 0.0) |
| // There are four possible paths to region node and phi node |
| RegionNode *r = new (C, 4) RegionNode(4); |
| Node *phi = new (C, 4) PhiNode(r, Type::DOUBLE); |
| |
| // Build the first if node: if (x <= 0.0) |
| // Node for 0 constant |
| Node *zeronode = makecon(TypeD::ZERO); |
| // Check x:0 |
| Node *cmp = _gvn.transform(new (C, 3) CmpDNode(x, zeronode)); |
| // Check: If (x<=0) then go complex path |
| Node *bol1 = _gvn.transform( new (C, 2) BoolNode( cmp, BoolTest::le ) ); |
| // Branch either way |
| IfNode *if1 = create_and_xform_if(control(),bol1, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN); |
| Node *opt_test = _gvn.transform(if1); |
| //assert( opt_test->is_If(), "Expect an IfNode"); |
| IfNode *opt_if1 = (IfNode*)opt_test; |
| // Fast path taken; set region slot 3 |
| Node *fast_taken = _gvn.transform( new (C, 1) IfFalseNode(opt_if1) ); |
| r->init_req(3,fast_taken); // Capture fast-control |
| |
| // Fast path not-taken, i.e. slow path |
| Node *complex_path = _gvn.transform( new (C, 1) IfTrueNode(opt_if1) ); |
| |
| // Set fast path result |
| Node *fast_result = _gvn.transform( new (C, 3) PowDNode(0, y, x) ); |
| phi->init_req(3, fast_result); |
| |
| // Complex path |
| // Build the second if node (if y is int) |
| // Node for (int)y |
| Node *inty = _gvn.transform( new (C, 2) ConvD2INode(y)); |
| // Node for (double)((int) y) |
| Node *doubleinty= _gvn.transform( new (C, 2) ConvI2DNode(inty)); |
| // Check (double)((int) y) : y |
| Node *cmpinty= _gvn.transform(new (C, 3) CmpDNode(doubleinty, y)); |
| // Check if (y isn't int) then go to slow path |
| |
| Node *bol2 = _gvn.transform( new (C, 2) BoolNode( cmpinty, BoolTest::ne ) ); |
| // Branch either way |
| IfNode *if2 = create_and_xform_if(complex_path,bol2, PROB_STATIC_INFREQUENT, COUNT_UNKNOWN); |
| Node *slow_path = opt_iff(r,if2); // Set region path 2 |
| |
| // Calculate DPow(abs(x), y)*(1 & (int)y) |
| // Node for constant 1 |
| Node *conone = intcon(1); |
| // 1& (int)y |
| Node *signnode= _gvn.transform( new (C, 3) AndINode(conone, inty) ); |
| // zero node |
| Node *conzero = intcon(0); |
| // Check (1&(int)y)==0? |
| Node *cmpeq1 = _gvn.transform(new (C, 3) CmpINode(signnode, conzero)); |
| // Check if (1&(int)y)!=0?, if so the result is negative |
| Node *bol3 = _gvn.transform( new (C, 2) BoolNode( cmpeq1, BoolTest::ne ) ); |
| // abs(x) |
| Node *absx=_gvn.transform( new (C, 2) AbsDNode(x)); |
| // abs(x)^y |
| Node *absxpowy = _gvn.transform( new (C, 3) PowDNode(0, y, absx) ); |
| // -abs(x)^y |
| Node *negabsxpowy = _gvn.transform(new (C, 2) NegDNode (absxpowy)); |
| // (1&(int)y)==1?-DPow(abs(x), y):DPow(abs(x), y) |
| Node *signresult = _gvn.transform( CMoveNode::make(C, NULL, bol3, absxpowy, negabsxpowy, Type::DOUBLE)); |
| // Set complex path fast result |
| phi->init_req(2, signresult); |
| |
| static const jlong nan_bits = CONST64(0x7ff8000000000000); |
| Node *slow_result = makecon(TypeD::make(*(double*)&nan_bits)); // return NaN |
| r->init_req(1,slow_path); |
| phi->init_req(1,slow_result); |
| |
| // Post merge |
| set_control(_gvn.transform(r)); |
| record_for_igvn(r); |
| result=_gvn.transform(phi); |
| } |
| |
| //------------------- |
| //result=(result.isNaN())? uncommon_trap():result; |
| // Check: If isNaN() by checking result!=result? then go to Strict Math |
| Node* cmpisnan = _gvn.transform(new (C, 3) CmpDNode(result,result)); |
| // Build the boolean node |
| Node* bolisnum = _gvn.transform( new (C, 2) BoolNode(cmpisnan, BoolTest::eq) ); |
| |
| { BuildCutout unless(this, bolisnum, PROB_STATIC_FREQUENT); |
| // End the current control-flow path |
| push_pair(x); |
| push_pair(y); |
| // Math.pow intrinsic returned a NaN, which requires StrictMath.pow |
| // to handle. Recompile without intrinsifying Math.pow. |
| uncommon_trap(Deoptimization::Reason_intrinsic, |
| Deoptimization::Action_make_not_entrant); |
| } |
| |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| push_pair(result); |
| |
| return true; |
| } |
| |
| //------------------------------inline_trans------------------------------------- |
| // Inline transcendental instructions, if possible. The Intel hardware gets |
| // these right, no funny corner cases missed. |
| bool LibraryCallKit::inline_trans(vmIntrinsics::ID id) { |
| _sp += arg_size(); // restore stack pointer |
| Node* arg = pop_math_arg(); |
| Node* trans = NULL; |
| |
| switch (id) { |
| case vmIntrinsics::_dlog: |
| trans = _gvn.transform((Node*)new (C, 2) LogDNode(arg)); |
| break; |
| case vmIntrinsics::_dlog10: |
| trans = _gvn.transform((Node*)new (C, 2) Log10DNode(arg)); |
| break; |
| default: |
| assert(false, "bad intrinsic was passed in"); |
| return false; |
| } |
| |
| // Push result back on JVM stack |
| push_pair(trans); |
| return true; |
| } |
| |
| //------------------------------runtime_math----------------------------- |
| bool LibraryCallKit::runtime_math(const TypeFunc* call_type, address funcAddr, const char* funcName) { |
| Node* a = NULL; |
| Node* b = NULL; |
| |
| assert(call_type == OptoRuntime::Math_DD_D_Type() || call_type == OptoRuntime::Math_D_D_Type(), |
| "must be (DD)D or (D)D type"); |
| |
| // Inputs |
| _sp += arg_size(); // restore stack pointer |
| if (call_type == OptoRuntime::Math_DD_D_Type()) { |
| b = pop_math_arg(); |
| } |
| a = pop_math_arg(); |
| |
| const TypePtr* no_memory_effects = NULL; |
| Node* trig = make_runtime_call(RC_LEAF, call_type, funcAddr, funcName, |
| no_memory_effects, |
| a, top(), b, b ? top() : NULL); |
| Node* value = _gvn.transform(new (C, 1) ProjNode(trig, TypeFunc::Parms+0)); |
| #ifdef ASSERT |
| Node* value_top = _gvn.transform(new (C, 1) ProjNode(trig, TypeFunc::Parms+1)); |
| assert(value_top == top(), "second value must be top"); |
| #endif |
| |
| push_pair(value); |
| return true; |
| } |
| |
| //------------------------------inline_math_native----------------------------- |
| bool LibraryCallKit::inline_math_native(vmIntrinsics::ID id) { |
| switch (id) { |
| // These intrinsics are not properly supported on all hardware |
| case vmIntrinsics::_dcos: return Matcher::has_match_rule(Op_CosD) ? inline_trig(id) : |
| runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dcos), "COS"); |
| case vmIntrinsics::_dsin: return Matcher::has_match_rule(Op_SinD) ? inline_trig(id) : |
| runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dsin), "SIN"); |
| case vmIntrinsics::_dtan: return Matcher::has_match_rule(Op_TanD) ? inline_trig(id) : |
| runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dtan), "TAN"); |
| |
| case vmIntrinsics::_dlog: return Matcher::has_match_rule(Op_LogD) ? inline_trans(id) : |
| runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dlog), "LOG"); |
| case vmIntrinsics::_dlog10: return Matcher::has_match_rule(Op_Log10D) ? inline_trans(id) : |
| runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dlog10), "LOG10"); |
| |
| // These intrinsics are supported on all hardware |
| case vmIntrinsics::_dsqrt: return Matcher::has_match_rule(Op_SqrtD) ? inline_sqrt(id) : false; |
| case vmIntrinsics::_dabs: return Matcher::has_match_rule(Op_AbsD) ? inline_abs(id) : false; |
| |
| // These intrinsics don't work on X86. The ad implementation doesn't |
| // handle NaN's properly. Instead of returning infinity, the ad |
| // implementation returns a NaN on overflow. See bug: 6304089 |
| // Once the ad implementations are fixed, change the code below |
| // to match the intrinsics above |
| |
| case vmIntrinsics::_dexp: return |
| runtime_math(OptoRuntime::Math_D_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dexp), "EXP"); |
| case vmIntrinsics::_dpow: return |
| runtime_math(OptoRuntime::Math_DD_D_Type(), CAST_FROM_FN_PTR(address, SharedRuntime::dpow), "POW"); |
| |
| // These intrinsics are not yet correctly implemented |
| case vmIntrinsics::_datan2: |
| return false; |
| |
| default: |
| ShouldNotReachHere(); |
| return false; |
| } |
| } |
| |
| static bool is_simple_name(Node* n) { |
| return (n->req() == 1 // constant |
| || (n->is_Type() && n->as_Type()->type()->singleton()) |
| || n->is_Proj() // parameter or return value |
| || n->is_Phi() // local of some sort |
| ); |
| } |
| |
| //----------------------------inline_min_max----------------------------------- |
| bool LibraryCallKit::inline_min_max(vmIntrinsics::ID id) { |
| push(generate_min_max(id, argument(0), argument(1))); |
| |
| return true; |
| } |
| |
| Node* |
| LibraryCallKit::generate_min_max(vmIntrinsics::ID id, Node* x0, Node* y0) { |
| // These are the candidate return value: |
| Node* xvalue = x0; |
| Node* yvalue = y0; |
| |
| if (xvalue == yvalue) { |
| return xvalue; |
| } |
| |
| bool want_max = (id == vmIntrinsics::_max); |
| |
| const TypeInt* txvalue = _gvn.type(xvalue)->isa_int(); |
| const TypeInt* tyvalue = _gvn.type(yvalue)->isa_int(); |
| if (txvalue == NULL || tyvalue == NULL) return top(); |
| // This is not really necessary, but it is consistent with a |
| // hypothetical MaxINode::Value method: |
| int widen = MAX2(txvalue->_widen, tyvalue->_widen); |
| |
| // %%% This folding logic should (ideally) be in a different place. |
| // Some should be inside IfNode, and there to be a more reliable |
| // transformation of ?: style patterns into cmoves. We also want |
| // more powerful optimizations around cmove and min/max. |
| |
| // Try to find a dominating comparison of these guys. |
| // It can simplify the index computation for Arrays.copyOf |
| // and similar uses of System.arraycopy. |
| // First, compute the normalized version of CmpI(x, y). |
| int cmp_op = Op_CmpI; |
| Node* xkey = xvalue; |
| Node* ykey = yvalue; |
| Node* ideal_cmpxy = _gvn.transform( new(C, 3) CmpINode(xkey, ykey) ); |
| if (ideal_cmpxy->is_Cmp()) { |
| // E.g., if we have CmpI(length - offset, count), |
| // it might idealize to CmpI(length, count + offset) |
| cmp_op = ideal_cmpxy->Opcode(); |
| xkey = ideal_cmpxy->in(1); |
| ykey = ideal_cmpxy->in(2); |
| } |
| |
| // Start by locating any relevant comparisons. |
| Node* start_from = (xkey->outcnt() < ykey->outcnt()) ? xkey : ykey; |
| Node* cmpxy = NULL; |
| Node* cmpyx = NULL; |
| for (DUIterator_Fast kmax, k = start_from->fast_outs(kmax); k < kmax; k++) { |
| Node* cmp = start_from->fast_out(k); |
| if (cmp->outcnt() > 0 && // must have prior uses |
| cmp->in(0) == NULL && // must be context-independent |
| cmp->Opcode() == cmp_op) { // right kind of compare |
| if (cmp->in(1) == xkey && cmp->in(2) == ykey) cmpxy = cmp; |
| if (cmp->in(1) == ykey && cmp->in(2) == xkey) cmpyx = cmp; |
| } |
| } |
| |
| const int NCMPS = 2; |
| Node* cmps[NCMPS] = { cmpxy, cmpyx }; |
| int cmpn; |
| for (cmpn = 0; cmpn < NCMPS; cmpn++) { |
| if (cmps[cmpn] != NULL) break; // find a result |
| } |
| if (cmpn < NCMPS) { |
| // Look for a dominating test that tells us the min and max. |
| int depth = 0; // Limit search depth for speed |
| Node* dom = control(); |
| for (; dom != NULL; dom = IfNode::up_one_dom(dom, true)) { |
| if (++depth >= 100) break; |
| Node* ifproj = dom; |
| if (!ifproj->is_Proj()) continue; |
| Node* iff = ifproj->in(0); |
| if (!iff->is_If()) continue; |
| Node* bol = iff->in(1); |
| if (!bol->is_Bool()) continue; |
| Node* cmp = bol->in(1); |
| if (cmp == NULL) continue; |
| for (cmpn = 0; cmpn < NCMPS; cmpn++) |
| if (cmps[cmpn] == cmp) break; |
| if (cmpn == NCMPS) continue; |
| BoolTest::mask btest = bol->as_Bool()->_test._test; |
| if (ifproj->is_IfFalse()) btest = BoolTest(btest).negate(); |
| if (cmp->in(1) == ykey) btest = BoolTest(btest).commute(); |
| // At this point, we know that 'x btest y' is true. |
| switch (btest) { |
| case BoolTest::eq: |
| // They are proven equal, so we can collapse the min/max. |
| // Either value is the answer. Choose the simpler. |
| if (is_simple_name(yvalue) && !is_simple_name(xvalue)) |
| return yvalue; |
| return xvalue; |
| case BoolTest::lt: // x < y |
| case BoolTest::le: // x <= y |
| return (want_max ? yvalue : xvalue); |
| case BoolTest::gt: // x > y |
| case BoolTest::ge: // x >= y |
| return (want_max ? xvalue : yvalue); |
| } |
| } |
| } |
| |
| // We failed to find a dominating test. |
| // Let's pick a test that might GVN with prior tests. |
| Node* best_bol = NULL; |
| BoolTest::mask best_btest = BoolTest::illegal; |
| for (cmpn = 0; cmpn < NCMPS; cmpn++) { |
| Node* cmp = cmps[cmpn]; |
| if (cmp == NULL) continue; |
| for (DUIterator_Fast jmax, j = cmp->fast_outs(jmax); j < jmax; j++) { |
| Node* bol = cmp->fast_out(j); |
| if (!bol->is_Bool()) continue; |
| BoolTest::mask btest = bol->as_Bool()->_test._test; |
| if (btest == BoolTest::eq || btest == BoolTest::ne) continue; |
| if (cmp->in(1) == ykey) btest = BoolTest(btest).commute(); |
| if (bol->outcnt() > (best_bol == NULL ? 0 : best_bol->outcnt())) { |
| best_bol = bol->as_Bool(); |
| best_btest = btest; |
| } |
| } |
| } |
| |
| Node* answer_if_true = NULL; |
| Node* answer_if_false = NULL; |
| switch (best_btest) { |
| default: |
| if (cmpxy == NULL) |
| cmpxy = ideal_cmpxy; |
| best_bol = _gvn.transform( new(C, 2) BoolNode(cmpxy, BoolTest::lt) ); |
| // and fall through: |
| case BoolTest::lt: // x < y |
| case BoolTest::le: // x <= y |
| answer_if_true = (want_max ? yvalue : xvalue); |
| answer_if_false = (want_max ? xvalue : yvalue); |
| break; |
| case BoolTest::gt: // x > y |
| case BoolTest::ge: // x >= y |
| answer_if_true = (want_max ? xvalue : yvalue); |
| answer_if_false = (want_max ? yvalue : xvalue); |
| break; |
| } |
| |
| jint hi, lo; |
| if (want_max) { |
| // We can sharpen the minimum. |
| hi = MAX2(txvalue->_hi, tyvalue->_hi); |
| lo = MAX2(txvalue->_lo, tyvalue->_lo); |
| } else { |
| // We can sharpen the maximum. |
| hi = MIN2(txvalue->_hi, tyvalue->_hi); |
| lo = MIN2(txvalue->_lo, tyvalue->_lo); |
| } |
| |
| // Use a flow-free graph structure, to avoid creating excess control edges |
| // which could hinder other optimizations. |
| // Since Math.min/max is often used with arraycopy, we want |
| // tightly_coupled_allocation to be able to see beyond min/max expressions. |
| Node* cmov = CMoveNode::make(C, NULL, best_bol, |
| answer_if_false, answer_if_true, |
| TypeInt::make(lo, hi, widen)); |
| |
| return _gvn.transform(cmov); |
| |
| /* |
| // This is not as desirable as it may seem, since Min and Max |
| // nodes do not have a full set of optimizations. |
| // And they would interfere, anyway, with 'if' optimizations |
| // and with CMoveI canonical forms. |
| switch (id) { |
| case vmIntrinsics::_min: |
| result_val = _gvn.transform(new (C, 3) MinINode(x,y)); break; |
| case vmIntrinsics::_max: |
| result_val = _gvn.transform(new (C, 3) MaxINode(x,y)); break; |
| default: |
| ShouldNotReachHere(); |
| } |
| */ |
| } |
| |
| inline int |
| LibraryCallKit::classify_unsafe_addr(Node* &base, Node* &offset) { |
| const TypePtr* base_type = TypePtr::NULL_PTR; |
| if (base != NULL) base_type = _gvn.type(base)->isa_ptr(); |
| if (base_type == NULL) { |
| // Unknown type. |
| return Type::AnyPtr; |
| } else if (base_type == TypePtr::NULL_PTR) { |
| // Since this is a NULL+long form, we have to switch to a rawptr. |
| base = _gvn.transform( new (C, 2) CastX2PNode(offset) ); |
| offset = MakeConX(0); |
| return Type::RawPtr; |
| } else if (base_type->base() == Type::RawPtr) { |
| return Type::RawPtr; |
| } else if (base_type->isa_oopptr()) { |
| // Base is never null => always a heap address. |
| if (base_type->ptr() == TypePtr::NotNull) { |
| return Type::OopPtr; |
| } |
| // Offset is small => always a heap address. |
| const TypeX* offset_type = _gvn.type(offset)->isa_intptr_t(); |
| if (offset_type != NULL && |
| base_type->offset() == 0 && // (should always be?) |
| offset_type->_lo >= 0 && |
| !MacroAssembler::needs_explicit_null_check(offset_type->_hi)) { |
| return Type::OopPtr; |
| } |
| // Otherwise, it might either be oop+off or NULL+addr. |
| return Type::AnyPtr; |
| } else { |
| // No information: |
| return Type::AnyPtr; |
| } |
| } |
| |
| inline Node* LibraryCallKit::make_unsafe_address(Node* base, Node* offset) { |
| int kind = classify_unsafe_addr(base, offset); |
| if (kind == Type::RawPtr) { |
| return basic_plus_adr(top(), base, offset); |
| } else { |
| return basic_plus_adr(base, offset); |
| } |
| } |
| |
| //-------------------inline_numberOfLeadingZeros_int/long----------------------- |
| // inline int Integer.numberOfLeadingZeros(int) |
| // inline int Long.numberOfLeadingZeros(long) |
| bool LibraryCallKit::inline_numberOfLeadingZeros(vmIntrinsics::ID id) { |
| assert(id == vmIntrinsics::_numberOfLeadingZeros_i || id == vmIntrinsics::_numberOfLeadingZeros_l, "not numberOfLeadingZeros"); |
| if (id == vmIntrinsics::_numberOfLeadingZeros_i && !Matcher::match_rule_supported(Op_CountLeadingZerosI)) return false; |
| if (id == vmIntrinsics::_numberOfLeadingZeros_l && !Matcher::match_rule_supported(Op_CountLeadingZerosL)) return false; |
| _sp += arg_size(); // restore stack pointer |
| switch (id) { |
| case vmIntrinsics::_numberOfLeadingZeros_i: |
| push(_gvn.transform(new (C, 2) CountLeadingZerosINode(pop()))); |
| break; |
| case vmIntrinsics::_numberOfLeadingZeros_l: |
| push(_gvn.transform(new (C, 2) CountLeadingZerosLNode(pop_pair()))); |
| break; |
| default: |
| ShouldNotReachHere(); |
| } |
| return true; |
| } |
| |
| //-------------------inline_numberOfTrailingZeros_int/long---------------------- |
| // inline int Integer.numberOfTrailingZeros(int) |
| // inline int Long.numberOfTrailingZeros(long) |
| bool LibraryCallKit::inline_numberOfTrailingZeros(vmIntrinsics::ID id) { |
| assert(id == vmIntrinsics::_numberOfTrailingZeros_i || id == vmIntrinsics::_numberOfTrailingZeros_l, "not numberOfTrailingZeros"); |
| if (id == vmIntrinsics::_numberOfTrailingZeros_i && !Matcher::match_rule_supported(Op_CountTrailingZerosI)) return false; |
| if (id == vmIntrinsics::_numberOfTrailingZeros_l && !Matcher::match_rule_supported(Op_CountTrailingZerosL)) return false; |
| _sp += arg_size(); // restore stack pointer |
| switch (id) { |
| case vmIntrinsics::_numberOfTrailingZeros_i: |
| push(_gvn.transform(new (C, 2) CountTrailingZerosINode(pop()))); |
| break; |
| case vmIntrinsics::_numberOfTrailingZeros_l: |
| push(_gvn.transform(new (C, 2) CountTrailingZerosLNode(pop_pair()))); |
| break; |
| default: |
| ShouldNotReachHere(); |
| } |
| return true; |
| } |
| |
| //----------------------------inline_bitCount_int/long----------------------- |
| // inline int Integer.bitCount(int) |
| // inline int Long.bitCount(long) |
| bool LibraryCallKit::inline_bitCount(vmIntrinsics::ID id) { |
| assert(id == vmIntrinsics::_bitCount_i || id == vmIntrinsics::_bitCount_l, "not bitCount"); |
| if (id == vmIntrinsics::_bitCount_i && !Matcher::has_match_rule(Op_PopCountI)) return false; |
| if (id == vmIntrinsics::_bitCount_l && !Matcher::has_match_rule(Op_PopCountL)) return false; |
| _sp += arg_size(); // restore stack pointer |
| switch (id) { |
| case vmIntrinsics::_bitCount_i: |
| push(_gvn.transform(new (C, 2) PopCountINode(pop()))); |
| break; |
| case vmIntrinsics::_bitCount_l: |
| push(_gvn.transform(new (C, 2) PopCountLNode(pop_pair()))); |
| break; |
| default: |
| ShouldNotReachHere(); |
| } |
| return true; |
| } |
| |
| //----------------------------inline_reverseBytes_int/long/char/short------------------- |
| // inline Integer.reverseBytes(int) |
| // inline Long.reverseBytes(long) |
| // inline Character.reverseBytes(char) |
| // inline Short.reverseBytes(short) |
| bool LibraryCallKit::inline_reverseBytes(vmIntrinsics::ID id) { |
| assert(id == vmIntrinsics::_reverseBytes_i || id == vmIntrinsics::_reverseBytes_l || |
| id == vmIntrinsics::_reverseBytes_c || id == vmIntrinsics::_reverseBytes_s, |
| "not reverse Bytes"); |
| if (id == vmIntrinsics::_reverseBytes_i && !Matcher::has_match_rule(Op_ReverseBytesI)) return false; |
| if (id == vmIntrinsics::_reverseBytes_l && !Matcher::has_match_rule(Op_ReverseBytesL)) return false; |
| if (id == vmIntrinsics::_reverseBytes_c && !Matcher::has_match_rule(Op_ReverseBytesUS)) return false; |
| if (id == vmIntrinsics::_reverseBytes_s && !Matcher::has_match_rule(Op_ReverseBytesS)) return false; |
| _sp += arg_size(); // restore stack pointer |
| switch (id) { |
| case vmIntrinsics::_reverseBytes_i: |
| push(_gvn.transform(new (C, 2) ReverseBytesINode(0, pop()))); |
| break; |
| case vmIntrinsics::_reverseBytes_l: |
| push_pair(_gvn.transform(new (C, 2) ReverseBytesLNode(0, pop_pair()))); |
| break; |
| case vmIntrinsics::_reverseBytes_c: |
| push(_gvn.transform(new (C, 2) ReverseBytesUSNode(0, pop()))); |
| break; |
| case vmIntrinsics::_reverseBytes_s: |
| push(_gvn.transform(new (C, 2) ReverseBytesSNode(0, pop()))); |
| break; |
| default: |
| ; |
| } |
| return true; |
| } |
| |
| //----------------------------inline_unsafe_access---------------------------- |
| |
| const static BasicType T_ADDRESS_HOLDER = T_LONG; |
| |
| // Helper that guards and inserts a G1 pre-barrier. |
| void LibraryCallKit::insert_g1_pre_barrier(Node* base_oop, Node* offset, Node* pre_val) { |
| assert(UseG1GC, "should not call this otherwise"); |
| |
| // We could be accessing the referent field of a reference object. If so, when G1 |
| // is enabled, we need to log the value in the referent field in an SATB buffer. |
| // This routine performs some compile time filters and generates suitable |
| // runtime filters that guard the pre-barrier code. |
| |
| // Some compile time checks. |
| |
| // If offset is a constant, is it java_lang_ref_Reference::_reference_offset? |
| const TypeX* otype = offset->find_intptr_t_type(); |
| if (otype != NULL && otype->is_con() && |
| otype->get_con() != java_lang_ref_Reference::referent_offset) { |
| // Constant offset but not the reference_offset so just return |
| return; |
| } |
| |
| // We only need to generate the runtime guards for instances. |
| const TypeOopPtr* btype = base_oop->bottom_type()->isa_oopptr(); |
| if (btype != NULL) { |
| if (btype->isa_aryptr()) { |
| // Array type so nothing to do |
| return; |
| } |
| |
| const TypeInstPtr* itype = btype->isa_instptr(); |
| if (itype != NULL) { |
| // Can the klass of base_oop be statically determined |
| // to be _not_ a sub-class of Reference? |
| ciKlass* klass = itype->klass(); |
| if (klass->is_subtype_of(env()->Reference_klass()) && |
| !env()->Reference_klass()->is_subtype_of(klass)) { |
| return; |
| } |
| } |
| } |
| |
| // The compile time filters did not reject base_oop/offset so |
| // we need to generate the following runtime filters |
| // |
| // if (offset == java_lang_ref_Reference::_reference_offset) { |
| // if (base != null) { |
| // if (instance_of(base, java.lang.ref.Reference)) { |
| // pre_barrier(_, pre_val, ...); |
| // } |
| // } |
| // } |
| |
| float likely = PROB_LIKELY(0.999); |
| float unlikely = PROB_UNLIKELY(0.999); |
| |
| IdealKit ideal(this); |
| #define __ ideal. |
| |
| Node* referent_off = __ ConX(java_lang_ref_Reference::referent_offset); |
| |
| __ if_then(offset, BoolTest::eq, referent_off, unlikely); { |
| __ if_then(base_oop, BoolTest::ne, null(), likely); { |
| |
| // Update graphKit memory and control from IdealKit. |
| sync_kit(ideal); |
| |
| Node* ref_klass_con = makecon(TypeKlassPtr::make(env()->Reference_klass())); |
| Node* is_instof = gen_instanceof(base_oop, ref_klass_con); |
| |
| // Update IdealKit memory and control from graphKit. |
| __ sync_kit(this); |
| |
| Node* one = __ ConI(1); |
| |
| __ if_then(is_instof, BoolTest::eq, one, unlikely); { |
| |
| // Update graphKit from IdeakKit. |
| sync_kit(ideal); |
| |
| // Use the pre-barrier to record the value in the referent field |
| pre_barrier(false /* do_load */, |
| __ ctrl(), |
| NULL /* obj */, NULL /* adr */, max_juint /* alias_idx */, NULL /* val */, NULL /* val_type */, |
| pre_val /* pre_val */, |
| T_OBJECT); |
| |
| // Update IdealKit from graphKit. |
| __ sync_kit(this); |
| |
| } __ end_if(); // _ref_type != ref_none |
| } __ end_if(); // base != NULL |
| } __ end_if(); // offset == referent_offset |
| |
| // Final sync IdealKit and GraphKit. |
| final_sync(ideal); |
| #undef __ |
| } |
| |
| |
| // Interpret Unsafe.fieldOffset cookies correctly: |
| extern jlong Unsafe_field_offset_to_byte_offset(jlong field_offset); |
| |
| bool LibraryCallKit::inline_unsafe_access(bool is_native_ptr, bool is_store, BasicType type, bool is_volatile) { |
| if (callee()->is_static()) return false; // caller must have the capability! |
| |
| #ifndef PRODUCT |
| { |
| ResourceMark rm; |
| // Check the signatures. |
| ciSignature* sig = signature(); |
| #ifdef ASSERT |
| if (!is_store) { |
| // Object getObject(Object base, int/long offset), etc. |
| BasicType rtype = sig->return_type()->basic_type(); |
| if (rtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::getAddress_name()) |
| rtype = T_ADDRESS; // it is really a C void* |
| assert(rtype == type, "getter must return the expected value"); |
| if (!is_native_ptr) { |
| assert(sig->count() == 2, "oop getter has 2 arguments"); |
| assert(sig->type_at(0)->basic_type() == T_OBJECT, "getter base is object"); |
| assert(sig->type_at(1)->basic_type() == T_LONG, "getter offset is correct"); |
| } else { |
| assert(sig->count() == 1, "native getter has 1 argument"); |
| assert(sig->type_at(0)->basic_type() == T_LONG, "getter base is long"); |
| } |
| } else { |
| // void putObject(Object base, int/long offset, Object x), etc. |
| assert(sig->return_type()->basic_type() == T_VOID, "putter must not return a value"); |
| if (!is_native_ptr) { |
| assert(sig->count() == 3, "oop putter has 3 arguments"); |
| assert(sig->type_at(0)->basic_type() == T_OBJECT, "putter base is object"); |
| assert(sig->type_at(1)->basic_type() == T_LONG, "putter offset is correct"); |
| } else { |
| assert(sig->count() == 2, "native putter has 2 arguments"); |
| assert(sig->type_at(0)->basic_type() == T_LONG, "putter base is long"); |
| } |
| BasicType vtype = sig->type_at(sig->count()-1)->basic_type(); |
| if (vtype == T_ADDRESS_HOLDER && callee()->name() == ciSymbol::putAddress_name()) |
| vtype = T_ADDRESS; // it is really a C void* |
| assert(vtype == type, "putter must accept the expected value"); |
| } |
| #endif // ASSERT |
| } |
| #endif //PRODUCT |
| |
| C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". |
| |
| int type_words = type2size[ (type == T_ADDRESS) ? T_LONG : type ]; |
| |
| // Argument words: "this" plus (oop/offset) or (lo/hi) args plus maybe 1 or 2 value words |
| int nargs = 1 + (is_native_ptr ? 2 : 3) + (is_store ? type_words : 0); |
| |
| debug_only(int saved_sp = _sp); |
| _sp += nargs; |
| |
| Node* val; |
| debug_only(val = (Node*)(uintptr_t)-1); |
| |
| |
| if (is_store) { |
| // Get the value being stored. (Pop it first; it was pushed last.) |
| switch (type) { |
| case T_DOUBLE: |
| case T_LONG: |
| case T_ADDRESS: |
| val = pop_pair(); |
| break; |
| default: |
| val = pop(); |
| } |
| } |
| |
| // Build address expression. See the code in inline_unsafe_prefetch. |
| Node *adr; |
| Node *heap_base_oop = top(); |
| Node* offset = top(); |
| |
| if (!is_native_ptr) { |
| // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset |
| offset = pop_pair(); |
| // The base is either a Java object or a value produced by Unsafe.staticFieldBase |
| Node* base = pop(); |
| // We currently rely on the cookies produced by Unsafe.xxxFieldOffset |
| // to be plain byte offsets, which are also the same as those accepted |
| // by oopDesc::field_base. |
| assert(Unsafe_field_offset_to_byte_offset(11) == 11, |
| "fieldOffset must be byte-scaled"); |
| // 32-bit machines ignore the high half! |
| offset = ConvL2X(offset); |
| adr = make_unsafe_address(base, offset); |
| heap_base_oop = base; |
| } else { |
| Node* ptr = pop_pair(); |
| // Adjust Java long to machine word: |
| ptr = ConvL2X(ptr); |
| adr = make_unsafe_address(NULL, ptr); |
| } |
| |
| // Pop receiver last: it was pushed first. |
| Node *receiver = pop(); |
| |
| assert(saved_sp == _sp, "must have correct argument count"); |
| |
| const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); |
| |
| // First guess at the value type. |
| const Type *value_type = Type::get_const_basic_type(type); |
| |
| // Try to categorize the address. If it comes up as TypeJavaPtr::BOTTOM, |
| // there was not enough information to nail it down. |
| Compile::AliasType* alias_type = C->alias_type(adr_type); |
| assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here"); |
| |
| // We will need memory barriers unless we can determine a unique |
| // alias category for this reference. (Note: If for some reason |
| // the barriers get omitted and the unsafe reference begins to "pollute" |
| // the alias analysis of the rest of the graph, either Compile::can_alias |
| // or Compile::must_alias will throw a diagnostic assert.) |
| bool need_mem_bar = (alias_type->adr_type() == TypeOopPtr::BOTTOM); |
| |
| // If we are reading the value of the referent field of a Reference |
| // object (either by using Unsafe directly or through reflection) |
| // then, if G1 is enabled, we need to record the referent in an |
| // SATB log buffer using the pre-barrier mechanism. |
| bool need_read_barrier = UseG1GC && !is_native_ptr && !is_store && |
| offset != top() && heap_base_oop != top(); |
| |
| if (!is_store && type == T_OBJECT) { |
| // Attempt to infer a sharper value type from the offset and base type. |
| ciKlass* sharpened_klass = NULL; |
| |
| // See if it is an instance field, with an object type. |
| if (alias_type->field() != NULL) { |
| assert(!is_native_ptr, "native pointer op cannot use a java address"); |
| if (alias_type->field()->type()->is_klass()) { |
| sharpened_klass = alias_type->field()->type()->as_klass(); |
| } |
| } |
| |
| // See if it is a narrow oop array. |
| if (adr_type->isa_aryptr()) { |
| if (adr_type->offset() >= objArrayOopDesc::base_offset_in_bytes()) { |
| const TypeOopPtr *elem_type = adr_type->is_aryptr()->elem()->isa_oopptr(); |
| if (elem_type != NULL) { |
| sharpened_klass = elem_type->klass(); |
| } |
| } |
| } |
| |
| if (sharpened_klass != NULL) { |
| const TypeOopPtr* tjp = TypeOopPtr::make_from_klass(sharpened_klass); |
| |
| // Sharpen the value type. |
| value_type = tjp; |
| |
| #ifndef PRODUCT |
| if (PrintIntrinsics || PrintInlining || PrintOptoInlining) { |
| tty->print(" from base type: "); adr_type->dump(); |
| tty->print(" sharpened value: "); value_type->dump(); |
| } |
| #endif |
| } |
| } |
| |
| // Null check on self without removing any arguments. The argument |
| // null check technically happens in the wrong place, which can lead to |
| // invalid stack traces when the primitive is inlined into a method |
| // which handles NullPointerExceptions. |
| _sp += nargs; |
| do_null_check(receiver, T_OBJECT); |
| _sp -= nargs; |
| if (stopped()) { |
| return true; |
| } |
| // Heap pointers get a null-check from the interpreter, |
| // as a courtesy. However, this is not guaranteed by Unsafe, |
| // and it is not possible to fully distinguish unintended nulls |
| // from intended ones in this API. |
| |
| if (is_volatile) { |
| // We need to emit leading and trailing CPU membars (see below) in |
| // addition to memory membars when is_volatile. This is a little |
| // too strong, but avoids the need to insert per-alias-type |
| // volatile membars (for stores; compare Parse::do_put_xxx), which |
| // we cannot do effectively here because we probably only have a |
| // rough approximation of type. |
| need_mem_bar = true; |
| // For Stores, place a memory ordering barrier now. |
| if (is_store) |
| insert_mem_bar(Op_MemBarRelease); |
| } |
| |
| // Memory barrier to prevent normal and 'unsafe' accesses from |
| // bypassing each other. Happens after null checks, so the |
| // exception paths do not take memory state from the memory barrier, |
| // so there's no problems making a strong assert about mixing users |
| // of safe & unsafe memory. Otherwise fails in a CTW of rt.jar |
| // around 5701, class sun/reflect/UnsafeBooleanFieldAccessorImpl. |
| if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder); |
| |
| if (!is_store) { |
| Node* p = make_load(control(), adr, value_type, type, adr_type, is_volatile); |
| // load value and push onto stack |
| switch (type) { |
| case T_BOOLEAN: |
| case T_CHAR: |
| case T_BYTE: |
| case T_SHORT: |
| case T_INT: |
| case T_FLOAT: |
| push(p); |
| break; |
| case T_OBJECT: |
| if (need_read_barrier) { |
| insert_g1_pre_barrier(heap_base_oop, offset, p); |
| } |
| push(p); |
| break; |
| case T_ADDRESS: |
| // Cast to an int type. |
| p = _gvn.transform( new (C, 2) CastP2XNode(NULL,p) ); |
| p = ConvX2L(p); |
| push_pair(p); |
| break; |
| case T_DOUBLE: |
| case T_LONG: |
| push_pair( p ); |
| break; |
| default: ShouldNotReachHere(); |
| } |
| } else { |
| // place effect of store into memory |
| switch (type) { |
| case T_DOUBLE: |
| val = dstore_rounding(val); |
| break; |
| case T_ADDRESS: |
| // Repackage the long as a pointer. |
| val = ConvL2X(val); |
| val = _gvn.transform( new (C, 2) CastX2PNode(val) ); |
| break; |
| } |
| |
| if (type != T_OBJECT ) { |
| (void) store_to_memory(control(), adr, val, type, adr_type, is_volatile); |
| } else { |
| // Possibly an oop being stored to Java heap or native memory |
| if (!TypePtr::NULL_PTR->higher_equal(_gvn.type(heap_base_oop))) { |
| // oop to Java heap. |
| (void) store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type); |
| } else { |
| // We can't tell at compile time if we are storing in the Java heap or outside |
| // of it. So we need to emit code to conditionally do the proper type of |
| // store. |
| |
| IdealKit ideal(this); |
| #define __ ideal. |
| // QQQ who knows what probability is here?? |
| __ if_then(heap_base_oop, BoolTest::ne, null(), PROB_UNLIKELY(0.999)); { |
| // Sync IdealKit and graphKit. |
| sync_kit(ideal); |
| Node* st = store_oop_to_unknown(control(), heap_base_oop, adr, adr_type, val, type); |
| // Update IdealKit memory. |
| __ sync_kit(this); |
| } __ else_(); { |
| __ store(__ ctrl(), adr, val, type, alias_type->index(), is_volatile); |
| } __ end_if(); |
| // Final sync IdealKit and GraphKit. |
| final_sync(ideal); |
| #undef __ |
| } |
| } |
| } |
| |
| if (is_volatile) { |
| if (!is_store) |
| insert_mem_bar(Op_MemBarAcquire); |
| else |
| insert_mem_bar(Op_MemBarVolatile); |
| } |
| |
| if (need_mem_bar) insert_mem_bar(Op_MemBarCPUOrder); |
| |
| return true; |
| } |
| |
| //----------------------------inline_unsafe_prefetch---------------------------- |
| |
| bool LibraryCallKit::inline_unsafe_prefetch(bool is_native_ptr, bool is_store, bool is_static) { |
| #ifndef PRODUCT |
| { |
| ResourceMark rm; |
| // Check the signatures. |
| ciSignature* sig = signature(); |
| #ifdef ASSERT |
| // Object getObject(Object base, int/long offset), etc. |
| BasicType rtype = sig->return_type()->basic_type(); |
| if (!is_native_ptr) { |
| assert(sig->count() == 2, "oop prefetch has 2 arguments"); |
| assert(sig->type_at(0)->basic_type() == T_OBJECT, "prefetch base is object"); |
| assert(sig->type_at(1)->basic_type() == T_LONG, "prefetcha offset is correct"); |
| } else { |
| assert(sig->count() == 1, "native prefetch has 1 argument"); |
| assert(sig->type_at(0)->basic_type() == T_LONG, "prefetch base is long"); |
| } |
| #endif // ASSERT |
| } |
| #endif // !PRODUCT |
| |
| C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". |
| |
| // Argument words: "this" if not static, plus (oop/offset) or (lo/hi) args |
| int nargs = (is_static ? 0 : 1) + (is_native_ptr ? 2 : 3); |
| |
| debug_only(int saved_sp = _sp); |
| _sp += nargs; |
| |
| // Build address expression. See the code in inline_unsafe_access. |
| Node *adr; |
| if (!is_native_ptr) { |
| // The offset is a value produced by Unsafe.staticFieldOffset or Unsafe.objectFieldOffset |
| Node* offset = pop_pair(); |
| // The base is either a Java object or a value produced by Unsafe.staticFieldBase |
| Node* base = pop(); |
| // We currently rely on the cookies produced by Unsafe.xxxFieldOffset |
| // to be plain byte offsets, which are also the same as those accepted |
| // by oopDesc::field_base. |
| assert(Unsafe_field_offset_to_byte_offset(11) == 11, |
| "fieldOffset must be byte-scaled"); |
| // 32-bit machines ignore the high half! |
| offset = ConvL2X(offset); |
| adr = make_unsafe_address(base, offset); |
| } else { |
| Node* ptr = pop_pair(); |
| // Adjust Java long to machine word: |
| ptr = ConvL2X(ptr); |
| adr = make_unsafe_address(NULL, ptr); |
| } |
| |
| if (is_static) { |
| assert(saved_sp == _sp, "must have correct argument count"); |
| } else { |
| // Pop receiver last: it was pushed first. |
| Node *receiver = pop(); |
| assert(saved_sp == _sp, "must have correct argument count"); |
| |
| // Null check on self without removing any arguments. The argument |
| // null check technically happens in the wrong place, which can lead to |
| // invalid stack traces when the primitive is inlined into a method |
| // which handles NullPointerExceptions. |
| _sp += nargs; |
| do_null_check(receiver, T_OBJECT); |
| _sp -= nargs; |
| if (stopped()) { |
| return true; |
| } |
| } |
| |
| // Generate the read or write prefetch |
| Node *prefetch; |
| if (is_store) { |
| prefetch = new (C, 3) PrefetchWriteNode(i_o(), adr); |
| } else { |
| prefetch = new (C, 3) PrefetchReadNode(i_o(), adr); |
| } |
| prefetch->init_req(0, control()); |
| set_i_o(_gvn.transform(prefetch)); |
| |
| return true; |
| } |
| |
| //----------------------------inline_unsafe_CAS---------------------------- |
| |
| bool LibraryCallKit::inline_unsafe_CAS(BasicType type) { |
| // This basic scheme here is the same as inline_unsafe_access, but |
| // differs in enough details that combining them would make the code |
| // overly confusing. (This is a true fact! I originally combined |
| // them, but even I was confused by it!) As much code/comments as |
| // possible are retained from inline_unsafe_access though to make |
| // the correspondences clearer. - dl |
| |
| if (callee()->is_static()) return false; // caller must have the capability! |
| |
| #ifndef PRODUCT |
| { |
| ResourceMark rm; |
| // Check the signatures. |
| ciSignature* sig = signature(); |
| #ifdef ASSERT |
| BasicType rtype = sig->return_type()->basic_type(); |
| assert(rtype == T_BOOLEAN, "CAS must return boolean"); |
| assert(sig->count() == 4, "CAS has 4 arguments"); |
| assert(sig->type_at(0)->basic_type() == T_OBJECT, "CAS base is object"); |
| assert(sig->type_at(1)->basic_type() == T_LONG, "CAS offset is long"); |
| #endif // ASSERT |
| } |
| #endif //PRODUCT |
| |
| // number of stack slots per value argument (1 or 2) |
| int type_words = type2size[type]; |
| |
| // Cannot inline wide CAS on machines that don't support it natively |
| if (type2aelembytes(type) > BytesPerInt && !VM_Version::supports_cx8()) |
| return false; |
| |
| C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". |
| |
| // Argument words: "this" plus oop plus offset plus oldvalue plus newvalue; |
| int nargs = 1 + 1 + 2 + type_words + type_words; |
| |
| // pop arguments: newval, oldval, offset, base, and receiver |
| debug_only(int saved_sp = _sp); |
| _sp += nargs; |
| Node* newval = (type_words == 1) ? pop() : pop_pair(); |
| Node* oldval = (type_words == 1) ? pop() : pop_pair(); |
| Node *offset = pop_pair(); |
| Node *base = pop(); |
| Node *receiver = pop(); |
| assert(saved_sp == _sp, "must have correct argument count"); |
| |
| // Null check receiver. |
| _sp += nargs; |
| do_null_check(receiver, T_OBJECT); |
| _sp -= nargs; |
| if (stopped()) { |
| return true; |
| } |
| |
| // Build field offset expression. |
| // We currently rely on the cookies produced by Unsafe.xxxFieldOffset |
| // to be plain byte offsets, which are also the same as those accepted |
| // by oopDesc::field_base. |
| assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled"); |
| // 32-bit machines ignore the high half of long offsets |
| offset = ConvL2X(offset); |
| Node* adr = make_unsafe_address(base, offset); |
| const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); |
| |
| // (Unlike inline_unsafe_access, there seems no point in trying |
| // to refine types. Just use the coarse types here. |
| const Type *value_type = Type::get_const_basic_type(type); |
| Compile::AliasType* alias_type = C->alias_type(adr_type); |
| assert(alias_type->index() != Compile::AliasIdxBot, "no bare pointers here"); |
| int alias_idx = C->get_alias_index(adr_type); |
| |
| // Memory-model-wise, a CAS acts like a little synchronized block, |
| // so needs barriers on each side. These don't translate into |
| // actual barriers on most machines, but we still need rest of |
| // compiler to respect ordering. |
| |
| insert_mem_bar(Op_MemBarRelease); |
| insert_mem_bar(Op_MemBarCPUOrder); |
| |
| // 4984716: MemBars must be inserted before this |
| // memory node in order to avoid a false |
| // dependency which will confuse the scheduler. |
| Node *mem = memory(alias_idx); |
| |
| // For now, we handle only those cases that actually exist: ints, |
| // longs, and Object. Adding others should be straightforward. |
| Node* cas; |
| switch(type) { |
| case T_INT: |
| cas = _gvn.transform(new (C, 5) CompareAndSwapINode(control(), mem, adr, newval, oldval)); |
| break; |
| case T_LONG: |
| cas = _gvn.transform(new (C, 5) CompareAndSwapLNode(control(), mem, adr, newval, oldval)); |
| break; |
| case T_OBJECT: |
| // Transformation of a value which could be NULL pointer (CastPP #NULL) |
| // could be delayed during Parse (for example, in adjust_map_after_if()). |
| // Execute transformation here to avoid barrier generation in such case. |
| if (_gvn.type(newval) == TypePtr::NULL_PTR) |
| newval = _gvn.makecon(TypePtr::NULL_PTR); |
| |
| // Reference stores need a store barrier. |
| // (They don't if CAS fails, but it isn't worth checking.) |
| pre_barrier(true /* do_load*/, |
| control(), base, adr, alias_idx, newval, value_type->make_oopptr(), |
| NULL /* pre_val*/, |
| T_OBJECT); |
| #ifdef _LP64 |
| if (adr->bottom_type()->is_ptr_to_narrowoop()) { |
| Node *newval_enc = _gvn.transform(new (C, 2) EncodePNode(newval, newval->bottom_type()->make_narrowoop())); |
| Node *oldval_enc = _gvn.transform(new (C, 2) EncodePNode(oldval, oldval->bottom_type()->make_narrowoop())); |
| cas = _gvn.transform(new (C, 5) CompareAndSwapNNode(control(), mem, adr, |
| newval_enc, oldval_enc)); |
| } else |
| #endif |
| { |
| cas = _gvn.transform(new (C, 5) CompareAndSwapPNode(control(), mem, adr, newval, oldval)); |
| } |
| post_barrier(control(), cas, base, adr, alias_idx, newval, T_OBJECT, true); |
| break; |
| default: |
| ShouldNotReachHere(); |
| break; |
| } |
| |
| // SCMemProjNodes represent the memory state of CAS. Their main |
| // role is to prevent CAS nodes from being optimized away when their |
| // results aren't used. |
| Node* proj = _gvn.transform( new (C, 1) SCMemProjNode(cas)); |
| set_memory(proj, alias_idx); |
| |
| // Add the trailing membar surrounding the access |
| insert_mem_bar(Op_MemBarCPUOrder); |
| insert_mem_bar(Op_MemBarAcquire); |
| |
| push(cas); |
| return true; |
| } |
| |
| bool LibraryCallKit::inline_unsafe_ordered_store(BasicType type) { |
| // This is another variant of inline_unsafe_access, differing in |
| // that it always issues store-store ("release") barrier and ensures |
| // store-atomicity (which only matters for "long"). |
| |
| if (callee()->is_static()) return false; // caller must have the capability! |
| |
| #ifndef PRODUCT |
| { |
| ResourceMark rm; |
| // Check the signatures. |
| ciSignature* sig = signature(); |
| #ifdef ASSERT |
| BasicType rtype = sig->return_type()->basic_type(); |
| assert(rtype == T_VOID, "must return void"); |
| assert(sig->count() == 3, "has 3 arguments"); |
| assert(sig->type_at(0)->basic_type() == T_OBJECT, "base is object"); |
| assert(sig->type_at(1)->basic_type() == T_LONG, "offset is long"); |
| #endif // ASSERT |
| } |
| #endif //PRODUCT |
| |
| // number of stack slots per value argument (1 or 2) |
| int type_words = type2size[type]; |
| |
| C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". |
| |
| // Argument words: "this" plus oop plus offset plus value; |
| int nargs = 1 + 1 + 2 + type_words; |
| |
| // pop arguments: val, offset, base, and receiver |
| debug_only(int saved_sp = _sp); |
| _sp += nargs; |
| Node* val = (type_words == 1) ? pop() : pop_pair(); |
| Node *offset = pop_pair(); |
| Node *base = pop(); |
| Node *receiver = pop(); |
| assert(saved_sp == _sp, "must have correct argument count"); |
| |
| // Null check receiver. |
| _sp += nargs; |
| do_null_check(receiver, T_OBJECT); |
| _sp -= nargs; |
| if (stopped()) { |
| return true; |
| } |
| |
| // Build field offset expression. |
| assert(Unsafe_field_offset_to_byte_offset(11) == 11, "fieldOffset must be byte-scaled"); |
| // 32-bit machines ignore the high half of long offsets |
| offset = ConvL2X(offset); |
| Node* adr = make_unsafe_address(base, offset); |
| const TypePtr *adr_type = _gvn.type(adr)->isa_ptr(); |
| const Type *value_type = Type::get_const_basic_type(type); |
| Compile::AliasType* alias_type = C->alias_type(adr_type); |
| |
| insert_mem_bar(Op_MemBarRelease); |
| insert_mem_bar(Op_MemBarCPUOrder); |
| // Ensure that the store is atomic for longs: |
| bool require_atomic_access = true; |
| Node* store; |
| if (type == T_OBJECT) // reference stores need a store barrier. |
| store = store_oop_to_unknown(control(), base, adr, adr_type, val, type); |
| else { |
| store = store_to_memory(control(), adr, val, type, adr_type, require_atomic_access); |
| } |
| insert_mem_bar(Op_MemBarCPUOrder); |
| return true; |
| } |
| |
| bool LibraryCallKit::inline_unsafe_allocate() { |
| if (callee()->is_static()) return false; // caller must have the capability! |
| int nargs = 1 + 1; |
| assert(signature()->size() == nargs-1, "alloc has 1 argument"); |
| null_check_receiver(callee()); // check then ignore argument(0) |
| _sp += nargs; // set original stack for use by uncommon_trap |
| Node* cls = do_null_check(argument(1), T_OBJECT); |
| _sp -= nargs; |
| if (stopped()) return true; |
| |
| Node* kls = load_klass_from_mirror(cls, false, nargs, NULL, 0); |
| _sp += nargs; // set original stack for use by uncommon_trap |
| kls = do_null_check(kls, T_OBJECT); |
| _sp -= nargs; |
| if (stopped()) return true; // argument was like int.class |
| |
| // Note: The argument might still be an illegal value like |
| // Serializable.class or Object[].class. The runtime will handle it. |
| // But we must make an explicit check for initialization. |
| Node* insp = basic_plus_adr(kls, in_bytes(instanceKlass::init_state_offset())); |
| // Use T_BOOLEAN for instanceKlass::_init_state so the compiler |
| // can generate code to load it as unsigned byte. |
| Node* inst = make_load(NULL, insp, TypeInt::UBYTE, T_BOOLEAN); |
| Node* bits = intcon(instanceKlass::fully_initialized); |
| Node* test = _gvn.transform( new (C, 3) SubINode(inst, bits) ); |
| // The 'test' is non-zero if we need to take a slow path. |
| |
| Node* obj = new_instance(kls, test); |
| push(obj); |
| |
| return true; |
| } |
| |
| #ifdef TRACE_HAVE_INTRINSICS |
| /* |
| * oop -> myklass |
| * myklass->trace_id |= USED |
| * return myklass->trace_id & ~0x3 |
| */ |
| bool LibraryCallKit::inline_native_classID() { |
| int nargs = 1 + 1; |
| null_check_receiver(callee()); // check then ignore argument(0) |
| _sp += nargs; |
| Node* cls = do_null_check(argument(1), T_OBJECT); |
| _sp -= nargs; |
| Node* kls = load_klass_from_mirror(cls, false, nargs, NULL, 0); |
| _sp += nargs; |
| kls = do_null_check(kls, T_OBJECT); |
| _sp -= nargs; |
| ByteSize offset = TRACE_ID_OFFSET; |
| Node* insp = basic_plus_adr(kls, in_bytes(offset)); |
| Node* tvalue = make_load(NULL, insp, TypeLong::LONG, T_LONG); |
| Node* bits = longcon(~0x03l); // ignore bit 0 & 1 |
| Node* andl = _gvn.transform(new (C, 3) AndLNode(tvalue, bits)); |
| Node* clsused = longcon(0x01l); // set the class bit |
| Node* orl = _gvn.transform(new (C, 3) OrLNode(tvalue, clsused)); |
| |
| const TypePtr *adr_type = _gvn.type(insp)->isa_ptr(); |
| store_to_memory(control(), insp, orl, T_LONG, adr_type); |
| push_pair(andl); |
| return true; |
| } |
| |
| bool LibraryCallKit::inline_native_threadID() { |
| Node* tls_ptr = NULL; |
| Node* cur_thr = generate_current_thread(tls_ptr); |
| Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset())); |
| Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS); |
| p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::thread_id_offset())); |
| |
| Node* threadid = NULL; |
| size_t thread_id_size = OSThread::thread_id_size(); |
| if (thread_id_size == (size_t) BytesPerLong) { |
| threadid = ConvL2I(make_load(control(), p, TypeLong::LONG, T_LONG)); |
| push(threadid); |
| } else if (thread_id_size == (size_t) BytesPerInt) { |
| threadid = make_load(control(), p, TypeInt::INT, T_INT); |
| push(threadid); |
| } else { |
| ShouldNotReachHere(); |
| } |
| return true; |
| } |
| #endif |
| |
| //------------------------inline_native_time_funcs-------------- |
| // inline code for System.currentTimeMillis() and System.nanoTime() |
| // these have the same type and signature |
| bool LibraryCallKit::inline_native_time_funcs(address funcAddr, const char* funcName) { |
| const TypeFunc *tf = OptoRuntime::void_long_Type(); |
| const TypePtr* no_memory_effects = NULL; |
| Node* time = make_runtime_call(RC_LEAF, tf, funcAddr, funcName, no_memory_effects); |
| Node* value = _gvn.transform(new (C, 1) ProjNode(time, TypeFunc::Parms+0)); |
| #ifdef ASSERT |
| Node* value_top = _gvn.transform(new (C, 1) ProjNode(time, TypeFunc::Parms + 1)); |
| assert(value_top == top(), "second value must be top"); |
| #endif |
| push_pair(value); |
| return true; |
| } |
| |
| //------------------------inline_native_currentThread------------------ |
| bool LibraryCallKit::inline_native_currentThread() { |
| Node* junk = NULL; |
| push(generate_current_thread(junk)); |
| return true; |
| } |
| |
| //------------------------inline_native_isInterrupted------------------ |
| bool LibraryCallKit::inline_native_isInterrupted() { |
| const int nargs = 1+1; // receiver + boolean |
| assert(nargs == arg_size(), "sanity"); |
| // Add a fast path to t.isInterrupted(clear_int): |
| // (t == Thread.current() && (!TLS._osthread._interrupted || !clear_int)) |
| // ? TLS._osthread._interrupted : /*slow path:*/ t.isInterrupted(clear_int) |
| // So, in the common case that the interrupt bit is false, |
| // we avoid making a call into the VM. Even if the interrupt bit |
| // is true, if the clear_int argument is false, we avoid the VM call. |
| // However, if the receiver is not currentThread, we must call the VM, |
| // because there must be some locking done around the operation. |
| |
| // We only go to the fast case code if we pass two guards. |
| // Paths which do not pass are accumulated in the slow_region. |
| RegionNode* slow_region = new (C, 1) RegionNode(1); |
| record_for_igvn(slow_region); |
| RegionNode* result_rgn = new (C, 4) RegionNode(1+3); // fast1, fast2, slow |
| PhiNode* result_val = new (C, 4) PhiNode(result_rgn, TypeInt::BOOL); |
| enum { no_int_result_path = 1, |
| no_clear_result_path = 2, |
| slow_result_path = 3 |
| }; |
| |
| // (a) Receiving thread must be the current thread. |
| Node* rec_thr = argument(0); |
| Node* tls_ptr = NULL; |
| Node* cur_thr = generate_current_thread(tls_ptr); |
| Node* cmp_thr = _gvn.transform( new (C, 3) CmpPNode(cur_thr, rec_thr) ); |
| Node* bol_thr = _gvn.transform( new (C, 2) BoolNode(cmp_thr, BoolTest::ne) ); |
| |
| bool known_current_thread = (_gvn.type(bol_thr) == TypeInt::ZERO); |
| if (!known_current_thread) |
| generate_slow_guard(bol_thr, slow_region); |
| |
| // (b) Interrupt bit on TLS must be false. |
| Node* p = basic_plus_adr(top()/*!oop*/, tls_ptr, in_bytes(JavaThread::osthread_offset())); |
| Node* osthread = make_load(NULL, p, TypeRawPtr::NOTNULL, T_ADDRESS); |
| p = basic_plus_adr(top()/*!oop*/, osthread, in_bytes(OSThread::interrupted_offset())); |
| // Set the control input on the field _interrupted read to prevent it floating up. |
| Node* int_bit = make_load(control(), p, TypeInt::BOOL, T_INT); |
| Node* cmp_bit = _gvn.transform( new (C, 3) CmpINode(int_bit, intcon(0)) ); |
| Node* bol_bit = _gvn.transform( new (C, 2) BoolNode(cmp_bit, BoolTest::ne) ); |
| |
| IfNode* iff_bit = create_and_map_if(control(), bol_bit, PROB_UNLIKELY_MAG(3), COUNT_UNKNOWN); |
| |
| // First fast path: if (!TLS._interrupted) return false; |
| Node* false_bit = _gvn.transform( new (C, 1) IfFalseNode(iff_bit) ); |
| result_rgn->init_req(no_int_result_path, false_bit); |
| result_val->init_req(no_int_result_path, intcon(0)); |
| |
| // drop through to next case |
| set_control( _gvn.transform(new (C, 1) IfTrueNode(iff_bit)) ); |
| |
| // (c) Or, if interrupt bit is set and clear_int is false, use 2nd fast path. |
| Node* clr_arg = argument(1); |
| Node* cmp_arg = _gvn.transform( new (C, 3) CmpINode(clr_arg, intcon(0)) ); |
| Node* bol_arg = _gvn.transform( new (C, 2) BoolNode(cmp_arg, BoolTest::ne) ); |
| IfNode* iff_arg = create_and_map_if(control(), bol_arg, PROB_FAIR, COUNT_UNKNOWN); |
| |
| // Second fast path: ... else if (!clear_int) return true; |
| Node* false_arg = _gvn.transform( new (C, 1) IfFalseNode(iff_arg) ); |
| result_rgn->init_req(no_clear_result_path, false_arg); |
| result_val->init_req(no_clear_result_path, intcon(1)); |
| |
| // drop through to next case |
| set_control( _gvn.transform(new (C, 1) IfTrueNode(iff_arg)) ); |
| |
| // (d) Otherwise, go to the slow path. |
| slow_region->add_req(control()); |
| set_control( _gvn.transform(slow_region) ); |
| |
| if (stopped()) { |
| // There is no slow path. |
| result_rgn->init_req(slow_result_path, top()); |
| result_val->init_req(slow_result_path, top()); |
| } else { |
| // non-virtual because it is a private non-static |
| CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_isInterrupted); |
| |
| Node* slow_val = set_results_for_java_call(slow_call); |
| // this->control() comes from set_results_for_java_call |
| |
| // If we know that the result of the slow call will be true, tell the optimizer! |
| if (known_current_thread) slow_val = intcon(1); |
| |
| Node* fast_io = slow_call->in(TypeFunc::I_O); |
| Node* fast_mem = slow_call->in(TypeFunc::Memory); |
| // These two phis are pre-filled with copies of of the fast IO and Memory |
| Node* io_phi = PhiNode::make(result_rgn, fast_io, Type::ABIO); |
| Node* mem_phi = PhiNode::make(result_rgn, fast_mem, Type::MEMORY, TypePtr::BOTTOM); |
| |
| result_rgn->init_req(slow_result_path, control()); |
| io_phi ->init_req(slow_result_path, i_o()); |
| mem_phi ->init_req(slow_result_path, reset_memory()); |
| result_val->init_req(slow_result_path, slow_val); |
| |
| set_all_memory( _gvn.transform(mem_phi) ); |
| set_i_o( _gvn.transform(io_phi) ); |
| } |
| |
| push_result(result_rgn, result_val); |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| return true; |
| } |
| |
| //---------------------------load_mirror_from_klass---------------------------- |
| // Given a klass oop, load its java mirror (a java.lang.Class oop). |
| Node* LibraryCallKit::load_mirror_from_klass(Node* klass) { |
| Node* p = basic_plus_adr(klass, in_bytes(Klass::java_mirror_offset())); |
| return make_load(NULL, p, TypeInstPtr::MIRROR, T_OBJECT); |
| } |
| |
| //-----------------------load_klass_from_mirror_common------------------------- |
| // Given a java mirror (a java.lang.Class oop), load its corresponding klass oop. |
| // Test the klass oop for null (signifying a primitive Class like Integer.TYPE), |
| // and branch to the given path on the region. |
| // If never_see_null, take an uncommon trap on null, so we can optimistically |
| // compile for the non-null case. |
| // If the region is NULL, force never_see_null = true. |
| Node* LibraryCallKit::load_klass_from_mirror_common(Node* mirror, |
| bool never_see_null, |
| int nargs, |
| RegionNode* region, |
| int null_path, |
| int offset) { |
| if (region == NULL) never_see_null = true; |
| Node* p = basic_plus_adr(mirror, offset); |
| const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL; |
| Node* kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, kls_type) ); |
| _sp += nargs; // any deopt will start just before call to enclosing method |
| Node* null_ctl = top(); |
| kls = null_check_oop(kls, &null_ctl, never_see_null); |
| if (region != NULL) { |
| // Set region->in(null_path) if the mirror is a primitive (e.g, int.class). |
| region->init_req(null_path, null_ctl); |
| } else { |
| assert(null_ctl == top(), "no loose ends"); |
| } |
| _sp -= nargs; |
| return kls; |
| } |
| |
| //--------------------(inline_native_Class_query helpers)--------------------- |
| // Use this for JVM_ACC_INTERFACE, JVM_ACC_IS_CLONEABLE, JVM_ACC_HAS_FINALIZER. |
| // Fall through if (mods & mask) == bits, take the guard otherwise. |
| Node* LibraryCallKit::generate_access_flags_guard(Node* kls, int modifier_mask, int modifier_bits, RegionNode* region) { |
| // Branch around if the given klass has the given modifier bit set. |
| // Like generate_guard, adds a new path onto the region. |
| Node* modp = basic_plus_adr(kls, in_bytes(Klass::access_flags_offset())); |
| Node* mods = make_load(NULL, modp, TypeInt::INT, T_INT); |
| Node* mask = intcon(modifier_mask); |
| Node* bits = intcon(modifier_bits); |
| Node* mbit = _gvn.transform( new (C, 3) AndINode(mods, mask) ); |
| Node* cmp = _gvn.transform( new (C, 3) CmpINode(mbit, bits) ); |
| Node* bol = _gvn.transform( new (C, 2) BoolNode(cmp, BoolTest::ne) ); |
| return generate_fair_guard(bol, region); |
| } |
| Node* LibraryCallKit::generate_interface_guard(Node* kls, RegionNode* region) { |
| return generate_access_flags_guard(kls, JVM_ACC_INTERFACE, 0, region); |
| } |
| |
| //-------------------------inline_native_Class_query------------------- |
| bool LibraryCallKit::inline_native_Class_query(vmIntrinsics::ID id) { |
| int nargs = 1+0; // just the Class mirror, in most cases |
| const Type* return_type = TypeInt::BOOL; |
| Node* prim_return_value = top(); // what happens if it's a primitive class? |
| bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); |
| bool expect_prim = false; // most of these guys expect to work on refs |
| |
| enum { _normal_path = 1, _prim_path = 2, PATH_LIMIT }; |
| |
| switch (id) { |
| case vmIntrinsics::_isInstance: |
| nargs = 1+1; // the Class mirror, plus the object getting queried about |
| // nothing is an instance of a primitive type |
| prim_return_value = intcon(0); |
| break; |
| case vmIntrinsics::_getModifiers: |
| prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); |
| assert(is_power_of_2((int)JVM_ACC_WRITTEN_FLAGS+1), "change next line"); |
| return_type = TypeInt::make(0, JVM_ACC_WRITTEN_FLAGS, Type::WidenMin); |
| break; |
| case vmIntrinsics::_isInterface: |
| prim_return_value = intcon(0); |
| break; |
| case vmIntrinsics::_isArray: |
| prim_return_value = intcon(0); |
| expect_prim = true; // cf. ObjectStreamClass.getClassSignature |
| break; |
| case vmIntrinsics::_isPrimitive: |
| prim_return_value = intcon(1); |
| expect_prim = true; // obviously |
| break; |
| case vmIntrinsics::_getSuperclass: |
| prim_return_value = null(); |
| return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR); |
| break; |
| case vmIntrinsics::_getComponentType: |
| prim_return_value = null(); |
| return_type = TypeInstPtr::MIRROR->cast_to_ptr_type(TypePtr::BotPTR); |
| break; |
| case vmIntrinsics::_getClassAccessFlags: |
| prim_return_value = intcon(JVM_ACC_ABSTRACT | JVM_ACC_FINAL | JVM_ACC_PUBLIC); |
| return_type = TypeInt::INT; // not bool! 6297094 |
| break; |
| default: |
| ShouldNotReachHere(); |
| } |
| |
| Node* mirror = argument(0); |
| Node* obj = (nargs <= 1)? top(): argument(1); |
| |
| const TypeInstPtr* mirror_con = _gvn.type(mirror)->isa_instptr(); |
| if (mirror_con == NULL) return false; // cannot happen? |
| |
| #ifndef PRODUCT |
| if (PrintIntrinsics || PrintInlining || PrintOptoInlining) { |
| ciType* k = mirror_con->java_mirror_type(); |
| if (k) { |
| tty->print("Inlining %s on constant Class ", vmIntrinsics::name_at(intrinsic_id())); |
| k->print_name(); |
| tty->cr(); |
| } |
| } |
| #endif |
| |
| // Null-check the mirror, and the mirror's klass ptr (in case it is a primitive). |
| RegionNode* region = new (C, PATH_LIMIT) RegionNode(PATH_LIMIT); |
| record_for_igvn(region); |
| PhiNode* phi = new (C, PATH_LIMIT) PhiNode(region, return_type); |
| |
| // The mirror will never be null of Reflection.getClassAccessFlags, however |
| // it may be null for Class.isInstance or Class.getModifiers. Throw a NPE |
| // if it is. See bug 4774291. |
| |
| // For Reflection.getClassAccessFlags(), the null check occurs in |
| // the wrong place; see inline_unsafe_access(), above, for a similar |
| // situation. |
| _sp += nargs; // set original stack for use by uncommon_trap |
| mirror = do_null_check(mirror, T_OBJECT); |
| _sp -= nargs; |
| // If mirror or obj is dead, only null-path is taken. |
| if (stopped()) return true; |
| |
| if (expect_prim) never_see_null = false; // expect nulls (meaning prims) |
| |
| // Now load the mirror's klass metaobject, and null-check it. |
| // Side-effects region with the control path if the klass is null. |
| Node* kls = load_klass_from_mirror(mirror, never_see_null, nargs, |
| region, _prim_path); |
| // If kls is null, we have a primitive mirror. |
| phi->init_req(_prim_path, prim_return_value); |
| if (stopped()) { push_result(region, phi); return true; } |
| |
| Node* p; // handy temp |
| Node* null_ctl; |
| |
| // Now that we have the non-null klass, we can perform the real query. |
| // For constant classes, the query will constant-fold in LoadNode::Value. |
| Node* query_value = top(); |
| switch (id) { |
| case vmIntrinsics::_isInstance: |
| // nothing is an instance of a primitive type |
| _sp += nargs; // gen_instanceof might do an uncommon trap |
| query_value = gen_instanceof(obj, kls); |
| _sp -= nargs; |
| break; |
| |
| case vmIntrinsics::_getModifiers: |
| p = basic_plus_adr(kls, in_bytes(Klass::modifier_flags_offset())); |
| query_value = make_load(NULL, p, TypeInt::INT, T_INT); |
| break; |
| |
| case vmIntrinsics::_isInterface: |
| // (To verify this code sequence, check the asserts in JVM_IsInterface.) |
| if (generate_interface_guard(kls, region) != NULL) |
| // A guard was added. If the guard is taken, it was an interface. |
| phi->add_req(intcon(1)); |
| // If we fall through, it's a plain class. |
| query_value = intcon(0); |
| break; |
| |
| case vmIntrinsics::_isArray: |
| // (To verify this code sequence, check the asserts in JVM_IsArrayClass.) |
| if (generate_array_guard(kls, region) != NULL) |
| // A guard was added. If the guard is taken, it was an array. |
| phi->add_req(intcon(1)); |
| // If we fall through, it's a plain class. |
| query_value = intcon(0); |
| break; |
| |
| case vmIntrinsics::_isPrimitive: |
| query_value = intcon(0); // "normal" path produces false |
| break; |
| |
| case vmIntrinsics::_getSuperclass: |
| // The rules here are somewhat unfortunate, but we can still do better |
| // with random logic than with a JNI call. |
| // Interfaces store null or Object as _super, but must report null. |
| // Arrays store an intermediate super as _super, but must report Object. |
| // Other types can report the actual _super. |
| // (To verify this code sequence, check the asserts in JVM_IsInterface.) |
| if (generate_interface_guard(kls, region) != NULL) |
| // A guard was added. If the guard is taken, it was an interface. |
| phi->add_req(null()); |
| if (generate_array_guard(kls, region) != NULL) |
| // A guard was added. If the guard is taken, it was an array. |
| phi->add_req(makecon(TypeInstPtr::make(env()->Object_klass()->java_mirror()))); |
| // If we fall through, it's a plain class. Get its _super. |
| p = basic_plus_adr(kls, in_bytes(Klass::super_offset())); |
| kls = _gvn.transform( LoadKlassNode::make(_gvn, immutable_memory(), p, TypeRawPtr::BOTTOM, TypeKlassPtr::OBJECT_OR_NULL) ); |
| null_ctl = top(); |
| kls = null_check_oop(kls, &null_ctl); |
| if (null_ctl != top()) { |
| // If the guard is taken, Object.superClass is null (both klass and mirror). |
| region->add_req(null_ctl); |
| phi ->add_req(null()); |
| } |
| if (!stopped()) { |
| query_value = load_mirror_from_klass(kls); |
| } |
| break; |
| |
| case vmIntrinsics::_getComponentType: |
| if (generate_array_guard(kls, region) != NULL) { |
| // Be sure to pin the oop load to the guard edge just created: |
| Node* is_array_ctrl = region->in(region->req()-1); |
| Node* cma = basic_plus_adr(kls, in_bytes(arrayKlass::component_mirror_offset())); |
| Node* cmo = make_load(is_array_ctrl, cma, TypeInstPtr::MIRROR, T_OBJECT); |
| phi->add_req(cmo); |
| } |
| query_value = null(); // non-array case is null |
| break; |
| |
| case vmIntrinsics::_getClassAccessFlags: |
| p = basic_plus_adr(kls, in_bytes(Klass::access_flags_offset())); |
| query_value = make_load(NULL, p, TypeInt::INT, T_INT); |
| break; |
| |
| default: |
| ShouldNotReachHere(); |
| } |
| |
| // Fall-through is the normal case of a query to a real class. |
| phi->init_req(1, query_value); |
| region->init_req(1, control()); |
| |
| push_result(region, phi); |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| return true; |
| } |
| |
| //--------------------------inline_native_subtype_check------------------------ |
| // This intrinsic takes the JNI calls out of the heart of |
| // UnsafeFieldAccessorImpl.set, which improves Field.set, readObject, etc. |
| bool LibraryCallKit::inline_native_subtype_check() { |
| int nargs = 1+1; // the Class mirror, plus the other class getting examined |
| |
| // Pull both arguments off the stack. |
| Node* args[2]; // two java.lang.Class mirrors: superc, subc |
| args[0] = argument(0); |
| args[1] = argument(1); |
| Node* klasses[2]; // corresponding Klasses: superk, subk |
| klasses[0] = klasses[1] = top(); |
| |
| enum { |
| // A full decision tree on {superc is prim, subc is prim}: |
| _prim_0_path = 1, // {P,N} => false |
| // {P,P} & superc!=subc => false |
| _prim_same_path, // {P,P} & superc==subc => true |
| _prim_1_path, // {N,P} => false |
| _ref_subtype_path, // {N,N} & subtype check wins => true |
| _both_ref_path, // {N,N} & subtype check loses => false |
| PATH_LIMIT |
| }; |
| |
| RegionNode* region = new (C, PATH_LIMIT) RegionNode(PATH_LIMIT); |
| Node* phi = new (C, PATH_LIMIT) PhiNode(region, TypeInt::BOOL); |
| record_for_igvn(region); |
| |
| const TypePtr* adr_type = TypeRawPtr::BOTTOM; // memory type of loads |
| const TypeKlassPtr* kls_type = TypeKlassPtr::OBJECT_OR_NULL; |
| int class_klass_offset = java_lang_Class::klass_offset_in_bytes(); |
| |
| // First null-check both mirrors and load each mirror's klass metaobject. |
| int which_arg; |
| for (which_arg = 0; which_arg <= 1; which_arg++) { |
| Node* arg = args[which_arg]; |
| _sp += nargs; // set original stack for use by uncommon_trap |
| arg = do_null_check(arg, T_OBJECT); |
| _sp -= nargs; |
| if (stopped()) break; |
| args[which_arg] = _gvn.transform(arg); |
| |
| Node* p = basic_plus_adr(arg, class_klass_offset); |
| Node* kls = LoadKlassNode::make(_gvn, immutable_memory(), p, adr_type, kls_type); |
| klasses[which_arg] = _gvn.transform(kls); |
| } |
| |
| // Having loaded both klasses, test each for null. |
| bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); |
| for (which_arg = 0; which_arg <= 1; which_arg++) { |
| Node* kls = klasses[which_arg]; |
| Node* null_ctl = top(); |
| _sp += nargs; // set original stack for use by uncommon_trap |
| kls = null_check_oop(kls, &null_ctl, never_see_null); |
| _sp -= nargs; |
| int prim_path = (which_arg == 0 ? _prim_0_path : _prim_1_path); |
| region->init_req(prim_path, null_ctl); |
| if (stopped()) break; |
| klasses[which_arg] = kls; |
| } |
| |
| if (!stopped()) { |
| // now we have two reference types, in klasses[0..1] |
| Node* subk = klasses[1]; // the argument to isAssignableFrom |
| Node* superk = klasses[0]; // the receiver |
| region->set_req(_both_ref_path, gen_subtype_check(subk, superk)); |
| // now we have a successful reference subtype check |
| region->set_req(_ref_subtype_path, control()); |
| } |
| |
| // If both operands are primitive (both klasses null), then |
| // we must return true when they are identical primitives. |
| // It is convenient to test this after the first null klass check. |
| set_control(region->in(_prim_0_path)); // go back to first null check |
| if (!stopped()) { |
| // Since superc is primitive, make a guard for the superc==subc case. |
| Node* cmp_eq = _gvn.transform( new (C, 3) CmpPNode(args[0], args[1]) ); |
| Node* bol_eq = _gvn.transform( new (C, 2) BoolNode(cmp_eq, BoolTest::eq) ); |
| generate_guard(bol_eq, region, PROB_FAIR); |
| if (region->req() == PATH_LIMIT+1) { |
| // A guard was added. If the added guard is taken, superc==subc. |
| region->swap_edges(PATH_LIMIT, _prim_same_path); |
| region->del_req(PATH_LIMIT); |
| } |
| region->set_req(_prim_0_path, control()); // Not equal after all. |
| } |
| |
| // these are the only paths that produce 'true': |
| phi->set_req(_prim_same_path, intcon(1)); |
| phi->set_req(_ref_subtype_path, intcon(1)); |
| |
| // pull together the cases: |
| assert(region->req() == PATH_LIMIT, "sane region"); |
| for (uint i = 1; i < region->req(); i++) { |
| Node* ctl = region->in(i); |
| if (ctl == NULL || ctl == top()) { |
| region->set_req(i, top()); |
| phi ->set_req(i, top()); |
| } else if (phi->in(i) == NULL) { |
| phi->set_req(i, intcon(0)); // all other paths produce 'false' |
| } |
| } |
| |
| set_control(_gvn.transform(region)); |
| push(_gvn.transform(phi)); |
| |
| return true; |
| } |
| |
| //---------------------generate_array_guard_common------------------------ |
| Node* LibraryCallKit::generate_array_guard_common(Node* kls, RegionNode* region, |
| bool obj_array, bool not_array) { |
| // If obj_array/non_array==false/false: |
| // Branch around if the given klass is in fact an array (either obj or prim). |
| // If obj_array/non_array==false/true: |
| // Branch around if the given klass is not an array klass of any kind. |
| // If obj_array/non_array==true/true: |
| // Branch around if the kls is not an oop array (kls is int[], String, etc.) |
| // If obj_array/non_array==true/false: |
| // Branch around if the kls is an oop array (Object[] or subtype) |
| // |
| // Like generate_guard, adds a new path onto the region. |
| jint layout_con = 0; |
| Node* layout_val = get_layout_helper(kls, layout_con); |
| if (layout_val == NULL) { |
| bool query = (obj_array |
| ? Klass::layout_helper_is_objArray(layout_con) |
| : Klass::layout_helper_is_javaArray(layout_con)); |
| if (query == not_array) { |
| return NULL; // never a branch |
| } else { // always a branch |
| Node* always_branch = control(); |
| if (region != NULL) |
| region->add_req(always_branch); |
| set_control(top()); |
| return always_branch; |
| } |
| } |
| // Now test the correct condition. |
| jint nval = (obj_array |
| ? ((jint)Klass::_lh_array_tag_type_value |
| << Klass::_lh_array_tag_shift) |
| : Klass::_lh_neutral_value); |
| Node* cmp = _gvn.transform( new(C, 3) CmpINode(layout_val, intcon(nval)) ); |
| BoolTest::mask btest = BoolTest::lt; // correct for testing is_[obj]array |
| // invert the test if we are looking for a non-array |
| if (not_array) btest = BoolTest(btest).negate(); |
| Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, btest) ); |
| return generate_fair_guard(bol, region); |
| } |
| |
| |
| //-----------------------inline_native_newArray-------------------------- |
| bool LibraryCallKit::inline_native_newArray() { |
| int nargs = 2; |
| Node* mirror = argument(0); |
| Node* count_val = argument(1); |
| |
| _sp += nargs; // set original stack for use by uncommon_trap |
| mirror = do_null_check(mirror, T_OBJECT); |
| _sp -= nargs; |
| // If mirror or obj is dead, only null-path is taken. |
| if (stopped()) return true; |
| |
| enum { _normal_path = 1, _slow_path = 2, PATH_LIMIT }; |
| RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); |
| PhiNode* result_val = new(C, PATH_LIMIT) PhiNode(result_reg, |
| TypeInstPtr::NOTNULL); |
| PhiNode* result_io = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO); |
| PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY, |
| TypePtr::BOTTOM); |
| |
| bool never_see_null = !too_many_traps(Deoptimization::Reason_null_check); |
| Node* klass_node = load_array_klass_from_mirror(mirror, never_see_null, |
| nargs, |
| result_reg, _slow_path); |
| Node* normal_ctl = control(); |
| Node* no_array_ctl = result_reg->in(_slow_path); |
| |
| // Generate code for the slow case. We make a call to newArray(). |
| set_control(no_array_ctl); |
| if (!stopped()) { |
| // Either the input type is void.class, or else the |
| // array klass has not yet been cached. Either the |
| // ensuing call will throw an exception, or else it |
| // will cache the array klass for next time. |
| PreserveJVMState pjvms(this); |
| CallJavaNode* slow_call = generate_method_call_static(vmIntrinsics::_newArray); |
| Node* slow_result = set_results_for_java_call(slow_call); |
| // this->control() comes from set_results_for_java_call |
| result_reg->set_req(_slow_path, control()); |
| result_val->set_req(_slow_path, slow_result); |
| result_io ->set_req(_slow_path, i_o()); |
| result_mem->set_req(_slow_path, reset_memory()); |
| } |
| |
| set_control(normal_ctl); |
| if (!stopped()) { |
| // Normal case: The array type has been cached in the java.lang.Class. |
| // The following call works fine even if the array type is polymorphic. |
| // It could be a dynamic mix of int[], boolean[], Object[], etc. |
| Node* obj = new_array(klass_node, count_val, nargs); |
| result_reg->init_req(_normal_path, control()); |
| result_val->init_req(_normal_path, obj); |
| result_io ->init_req(_normal_path, i_o()); |
| result_mem->init_req(_normal_path, reset_memory()); |
| } |
| |
| // Return the combined state. |
| set_i_o( _gvn.transform(result_io) ); |
| set_all_memory( _gvn.transform(result_mem) ); |
| push_result(result_reg, result_val); |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| return true; |
| } |
| |
| //----------------------inline_native_getLength-------------------------- |
| bool LibraryCallKit::inline_native_getLength() { |
| if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; |
| |
| int nargs = 1; |
| Node* array = argument(0); |
| |
| _sp += nargs; // set original stack for use by uncommon_trap |
| array = do_null_check(array, T_OBJECT); |
| _sp -= nargs; |
| |
| // If array is dead, only null-path is taken. |
| if (stopped()) return true; |
| |
| // Deoptimize if it is a non-array. |
| Node* non_array = generate_non_array_guard(load_object_klass(array), NULL); |
| |
| if (non_array != NULL) { |
| PreserveJVMState pjvms(this); |
| set_control(non_array); |
| _sp += nargs; // push the arguments back on the stack |
| uncommon_trap(Deoptimization::Reason_intrinsic, |
| Deoptimization::Action_maybe_recompile); |
| } |
| |
| // If control is dead, only non-array-path is taken. |
| if (stopped()) return true; |
| |
| // The works fine even if the array type is polymorphic. |
| // It could be a dynamic mix of int[], boolean[], Object[], etc. |
| push( load_array_length(array) ); |
| |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| return true; |
| } |
| |
| //------------------------inline_array_copyOf---------------------------- |
| bool LibraryCallKit::inline_array_copyOf(bool is_copyOfRange) { |
| if (too_many_traps(Deoptimization::Reason_intrinsic)) return false; |
| |
| // Restore the stack and pop off the arguments. |
| int nargs = 3 + (is_copyOfRange? 1: 0); |
| Node* original = argument(0); |
| Node* start = is_copyOfRange? argument(1): intcon(0); |
| Node* end = is_copyOfRange? argument(2): argument(1); |
| Node* array_type_mirror = is_copyOfRange? argument(3): argument(2); |
| |
| Node* newcopy; |
| |
| //set the original stack and the reexecute bit for the interpreter to reexecute |
| //the bytecode that invokes Arrays.copyOf if deoptimization happens |
| { PreserveReexecuteState preexecs(this); |
| _sp += nargs; |
| jvms()->set_should_reexecute(true); |
| |
| array_type_mirror = do_null_check(array_type_mirror, T_OBJECT); |
| original = do_null_check(original, T_OBJECT); |
| |
| // Check if a null path was taken unconditionally. |
| if (stopped()) return true; |
| |
| Node* orig_length = load_array_length(original); |
| |
| Node* klass_node = load_klass_from_mirror(array_type_mirror, false, 0, |
| NULL, 0); |
| klass_node = do_null_check(klass_node, T_OBJECT); |
| |
| RegionNode* bailout = new (C, 1) RegionNode(1); |
| record_for_igvn(bailout); |
| |
| // Despite the generic type of Arrays.copyOf, the mirror might be int, int[], etc. |
| // Bail out if that is so. |
| Node* not_objArray = generate_non_objArray_guard(klass_node, bailout); |
| if (not_objArray != NULL) { |
| // Improve the klass node's type from the new optimistic assumption: |
| ciKlass* ak = ciArrayKlass::make(env()->Object_klass()); |
| const Type* akls = TypeKlassPtr::make(TypePtr::NotNull, ak, 0/*offset*/); |
| Node* cast = new (C, 2) CastPPNode(klass_node, akls); |
| cast->init_req(0, control()); |
| klass_node = _gvn.transform(cast); |
| } |
| |
| // Bail out if either start or end is negative. |
| generate_negative_guard(start, bailout, &start); |
| generate_negative_guard(end, bailout, &end); |
| |
| Node* length = end; |
| if (_gvn.type(start) != TypeInt::ZERO) { |
| length = _gvn.transform( new (C, 3) SubINode(end, start) ); |
| } |
| |
| // Bail out if length is negative. |
| // ...Not needed, since the new_array will throw the right exception. |
| //generate_negative_guard(length, bailout, &length); |
| |
| if (bailout->req() > 1) { |
| PreserveJVMState pjvms(this); |
| set_control( _gvn.transform(bailout) ); |
| uncommon_trap(Deoptimization::Reason_intrinsic, |
| Deoptimization::Action_maybe_recompile); |
| } |
| |
| if (!stopped()) { |
| |
| // How many elements will we copy from the original? |
| // The answer is MinI(orig_length - start, length). |
| Node* orig_tail = _gvn.transform( new(C, 3) SubINode(orig_length, start) ); |
| Node* moved = generate_min_max(vmIntrinsics::_min, orig_tail, length); |
| |
| newcopy = new_array(klass_node, length, 0); |
| |
| // Generate a direct call to the right arraycopy function(s). |
| // We know the copy is disjoint but we might not know if the |
| // oop stores need checking. |
| // Extreme case: Arrays.copyOf((Integer[])x, 10, String[].class). |
| // This will fail a store-check if x contains any non-nulls. |
| bool disjoint_bases = true; |
| bool length_never_negative = true; |
| generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT, |
| original, start, newcopy, intcon(0), moved, |
| disjoint_bases, length_never_negative); |
| } |
| } //original reexecute and sp are set back here |
| |
| if(!stopped()) { |
| push(newcopy); |
| } |
| |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| return true; |
| } |
| |
| |
| //----------------------generate_virtual_guard--------------------------- |
| // Helper for hashCode and clone. Peeks inside the vtable to avoid a call. |
| Node* LibraryCallKit::generate_virtual_guard(Node* obj_klass, |
| RegionNode* slow_region) { |
| ciMethod* method = callee(); |
| int vtable_index = method->vtable_index(); |
| // Get the methodOop out of the appropriate vtable entry. |
| int entry_offset = (instanceKlass::vtable_start_offset() + |
| vtable_index*vtableEntry::size()) * wordSize + |
| vtableEntry::method_offset_in_bytes(); |
| Node* entry_addr = basic_plus_adr(obj_klass, entry_offset); |
| Node* target_call = make_load(NULL, entry_addr, TypeInstPtr::NOTNULL, T_OBJECT); |
| |
| // Compare the target method with the expected method (e.g., Object.hashCode). |
| const TypeInstPtr* native_call_addr = TypeInstPtr::make(method); |
| |
| Node* native_call = makecon(native_call_addr); |
| Node* chk_native = _gvn.transform( new(C, 3) CmpPNode(target_call, native_call) ); |
| Node* test_native = _gvn.transform( new(C, 2) BoolNode(chk_native, BoolTest::ne) ); |
| |
| return generate_slow_guard(test_native, slow_region); |
| } |
| |
| //-----------------------generate_method_call---------------------------- |
| // Use generate_method_call to make a slow-call to the real |
| // method if the fast path fails. An alternative would be to |
| // use a stub like OptoRuntime::slow_arraycopy_Java. |
| // This only works for expanding the current library call, |
| // not another intrinsic. (E.g., don't use this for making an |
| // arraycopy call inside of the copyOf intrinsic.) |
| CallJavaNode* |
| LibraryCallKit::generate_method_call(vmIntrinsics::ID method_id, bool is_virtual, bool is_static) { |
| // When compiling the intrinsic method itself, do not use this technique. |
| guarantee(callee() != C->method(), "cannot make slow-call to self"); |
| |
| ciMethod* method = callee(); |
| // ensure the JVMS we have will be correct for this call |
| guarantee(method_id == method->intrinsic_id(), "must match"); |
| |
| const TypeFunc* tf = TypeFunc::make(method); |
| int tfdc = tf->domain()->cnt(); |
| CallJavaNode* slow_call; |
| if (is_static) { |
| assert(!is_virtual, ""); |
| slow_call = new(C, tfdc) CallStaticJavaNode(tf, |
| SharedRuntime::get_resolve_static_call_stub(), |
| method, bci()); |
| } else if (is_virtual) { |
| null_check_receiver(method); |
| int vtable_index = methodOopDesc::invalid_vtable_index; |
| if (UseInlineCaches) { |
| // Suppress the vtable call |
| } else { |
| // hashCode and clone are not a miranda methods, |
| // so the vtable index is fixed. |
| // No need to use the linkResolver to get it. |
| vtable_index = method->vtable_index(); |
| } |
| slow_call = new(C, tfdc) CallDynamicJavaNode(tf, |
| SharedRuntime::get_resolve_virtual_call_stub(), |
| method, vtable_index, bci()); |
| } else { // neither virtual nor static: opt_virtual |
| null_check_receiver(method); |
| slow_call = new(C, tfdc) CallStaticJavaNode(tf, |
| SharedRuntime::get_resolve_opt_virtual_call_stub(), |
| method, bci()); |
| slow_call->set_optimized_virtual(true); |
| } |
| set_arguments_for_java_call(slow_call); |
| set_edges_for_java_call(slow_call); |
| return slow_call; |
| } |
| |
| |
| //------------------------------inline_native_hashcode-------------------- |
| // Build special case code for calls to hashCode on an object. |
| bool LibraryCallKit::inline_native_hashcode(bool is_virtual, bool is_static) { |
| assert(is_static == callee()->is_static(), "correct intrinsic selection"); |
| assert(!(is_virtual && is_static), "either virtual, special, or static"); |
| |
| enum { _slow_path = 1, _fast_path, _null_path, PATH_LIMIT }; |
| |
| RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); |
| PhiNode* result_val = new(C, PATH_LIMIT) PhiNode(result_reg, |
| TypeInt::INT); |
| PhiNode* result_io = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO); |
| PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY, |
| TypePtr::BOTTOM); |
| Node* obj = NULL; |
| if (!is_static) { |
| // Check for hashing null object |
| obj = null_check_receiver(callee()); |
| if (stopped()) return true; // unconditionally null |
| result_reg->init_req(_null_path, top()); |
| result_val->init_req(_null_path, top()); |
| } else { |
| // Do a null check, and return zero if null. |
| // System.identityHashCode(null) == 0 |
| obj = argument(0); |
| Node* null_ctl = top(); |
| obj = null_check_oop(obj, &null_ctl); |
| result_reg->init_req(_null_path, null_ctl); |
| result_val->init_req(_null_path, _gvn.intcon(0)); |
| } |
| |
| // Unconditionally null? Then return right away. |
| if (stopped()) { |
| set_control( result_reg->in(_null_path) ); |
| if (!stopped()) |
| push( result_val ->in(_null_path) ); |
| return true; |
| } |
| |
| // After null check, get the object's klass. |
| Node* obj_klass = load_object_klass(obj); |
| |
| // This call may be virtual (invokevirtual) or bound (invokespecial). |
| // For each case we generate slightly different code. |
| |
| // We only go to the fast case code if we pass a number of guards. The |
| // paths which do not pass are accumulated in the slow_region. |
| RegionNode* slow_region = new (C, 1) RegionNode(1); |
| record_for_igvn(slow_region); |
| |
| // If this is a virtual call, we generate a funny guard. We pull out |
| // the vtable entry corresponding to hashCode() from the target object. |
| // If the target method which we are calling happens to be the native |
| // Object hashCode() method, we pass the guard. We do not need this |
| // guard for non-virtual calls -- the caller is known to be the native |
| // Object hashCode(). |
| if (is_virtual) { |
| generate_virtual_guard(obj_klass, slow_region); |
| } |
| |
| // Get the header out of the object, use LoadMarkNode when available |
| Node* header_addr = basic_plus_adr(obj, oopDesc::mark_offset_in_bytes()); |
| Node* header = make_load(control(), header_addr, TypeX_X, TypeX_X->basic_type()); |
| |
| // Test the header to see if it is unlocked. |
| Node *lock_mask = _gvn.MakeConX(markOopDesc::biased_lock_mask_in_place); |
| Node *lmasked_header = _gvn.transform( new (C, 3) AndXNode(header, lock_mask) ); |
| Node *unlocked_val = _gvn.MakeConX(markOopDesc::unlocked_value); |
| Node *chk_unlocked = _gvn.transform( new (C, 3) CmpXNode( lmasked_header, unlocked_val)); |
| Node *test_unlocked = _gvn.transform( new (C, 2) BoolNode( chk_unlocked, BoolTest::ne) ); |
| |
| generate_slow_guard(test_unlocked, slow_region); |
| |
| // Get the hash value and check to see that it has been properly assigned. |
| // We depend on hash_mask being at most 32 bits and avoid the use of |
| // hash_mask_in_place because it could be larger than 32 bits in a 64-bit |
| // vm: see markOop.hpp. |
| Node *hash_mask = _gvn.intcon(markOopDesc::hash_mask); |
| Node *hash_shift = _gvn.intcon(markOopDesc::hash_shift); |
| Node *hshifted_header= _gvn.transform( new (C, 3) URShiftXNode(header, hash_shift) ); |
| // This hack lets the hash bits live anywhere in the mark object now, as long |
| // as the shift drops the relevant bits into the low 32 bits. Note that |
| // Java spec says that HashCode is an int so there's no point in capturing |
| // an 'X'-sized hashcode (32 in 32-bit build or 64 in 64-bit build). |
| hshifted_header = ConvX2I(hshifted_header); |
| Node *hash_val = _gvn.transform( new (C, 3) AndINode(hshifted_header, hash_mask) ); |
| |
| Node *no_hash_val = _gvn.intcon(markOopDesc::no_hash); |
| Node *chk_assigned = _gvn.transform( new (C, 3) CmpINode( hash_val, no_hash_val)); |
| Node *test_assigned = _gvn.transform( new (C, 2) BoolNode( chk_assigned, BoolTest::eq) ); |
| |
| generate_slow_guard(test_assigned, slow_region); |
| |
| Node* init_mem = reset_memory(); |
| // fill in the rest of the null path: |
| result_io ->init_req(_null_path, i_o()); |
| result_mem->init_req(_null_path, init_mem); |
| |
| result_val->init_req(_fast_path, hash_val); |
| result_reg->init_req(_fast_path, control()); |
| result_io ->init_req(_fast_path, i_o()); |
| result_mem->init_req(_fast_path, init_mem); |
| |
| // Generate code for the slow case. We make a call to hashCode(). |
| set_control(_gvn.transform(slow_region)); |
| if (!stopped()) { |
| // No need for PreserveJVMState, because we're using up the present state. |
| set_all_memory(init_mem); |
| vmIntrinsics::ID hashCode_id = vmIntrinsics::_hashCode; |
| if (is_static) hashCode_id = vmIntrinsics::_identityHashCode; |
| CallJavaNode* slow_call = generate_method_call(hashCode_id, is_virtual, is_static); |
| Node* slow_result = set_results_for_java_call(slow_call); |
| // this->control() comes from set_results_for_java_call |
| result_reg->init_req(_slow_path, control()); |
| result_val->init_req(_slow_path, slow_result); |
| result_io ->set_req(_slow_path, i_o()); |
| result_mem ->set_req(_slow_path, reset_memory()); |
| } |
| |
| // Return the combined state. |
| set_i_o( _gvn.transform(result_io) ); |
| set_all_memory( _gvn.transform(result_mem) ); |
| push_result(result_reg, result_val); |
| |
| return true; |
| } |
| |
| //---------------------------inline_native_getClass---------------------------- |
| // Build special case code for calls to getClass on an object. |
| bool LibraryCallKit::inline_native_getClass() { |
| Node* obj = null_check_receiver(callee()); |
| if (stopped()) return true; |
| push( load_mirror_from_klass(load_object_klass(obj)) ); |
| return true; |
| } |
| |
| //-----------------inline_native_Reflection_getCallerClass--------------------- |
| // In the presence of deep enough inlining, getCallerClass() becomes a no-op. |
| // |
| // NOTE that this code must perform the same logic as |
| // vframeStream::security_get_caller_frame in that it must skip |
| // Method.invoke() and auxiliary frames. |
| |
| |
| |
| |
| bool LibraryCallKit::inline_native_Reflection_getCallerClass() { |
| ciMethod* method = callee(); |
| |
| #ifndef PRODUCT |
| if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { |
| tty->print_cr("Attempting to inline sun.reflect.Reflection.getCallerClass"); |
| } |
| #endif |
| |
| debug_only(int saved_sp = _sp); |
| |
| // Argument words: (int depth) |
| int nargs = 1; |
| |
| _sp += nargs; |
| Node* caller_depth_node = pop(); |
| |
| assert(saved_sp == _sp, "must have correct argument count"); |
| |
| // The depth value must be a constant in order for the runtime call |
| // to be eliminated. |
| const TypeInt* caller_depth_type = _gvn.type(caller_depth_node)->isa_int(); |
| if (caller_depth_type == NULL || !caller_depth_type->is_con()) { |
| #ifndef PRODUCT |
| if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { |
| tty->print_cr(" Bailing out because caller depth was not a constant"); |
| } |
| #endif |
| return false; |
| } |
| // Note that the JVM state at this point does not include the |
| // getCallerClass() frame which we are trying to inline. The |
| // semantics of getCallerClass(), however, are that the "first" |
| // frame is the getCallerClass() frame, so we subtract one from the |
| // requested depth before continuing. We don't inline requests of |
| // getCallerClass(0). |
| int caller_depth = caller_depth_type->get_con() - 1; |
| if (caller_depth < 0) { |
| #ifndef PRODUCT |
| if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { |
| tty->print_cr(" Bailing out because caller depth was %d", caller_depth); |
| } |
| #endif |
| return false; |
| } |
| |
| if (!jvms()->has_method()) { |
| #ifndef PRODUCT |
| if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { |
| tty->print_cr(" Bailing out because intrinsic was inlined at top level"); |
| } |
| #endif |
| return false; |
| } |
| int _depth = jvms()->depth(); // cache call chain depth |
| |
| // Walk back up the JVM state to find the caller at the required |
| // depth. NOTE that this code must perform the same logic as |
| // vframeStream::security_get_caller_frame in that it must skip |
| // Method.invoke() and auxiliary frames. Note also that depth is |
| // 1-based (1 is the bottom of the inlining). |
| int inlining_depth = _depth; |
| JVMState* caller_jvms = NULL; |
| |
| if (inlining_depth > 0) { |
| caller_jvms = jvms(); |
| assert(caller_jvms = jvms()->of_depth(inlining_depth), "inlining_depth == our depth"); |
| do { |
| // The following if-tests should be performed in this order |
| if (is_method_invoke_or_aux_frame(caller_jvms)) { |
| // Skip a Method.invoke() or auxiliary frame |
| } else if (caller_depth > 0) { |
| // Skip real frame |
| --caller_depth; |
| } else { |
| // We're done: reached desired caller after skipping. |
| break; |
| } |
| caller_jvms = caller_jvms->caller(); |
| --inlining_depth; |
| } while (inlining_depth > 0); |
| } |
| |
| if (inlining_depth == 0) { |
| #ifndef PRODUCT |
| if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { |
| tty->print_cr(" Bailing out because caller depth (%d) exceeded inlining depth (%d)", caller_depth_type->get_con(), _depth); |
| tty->print_cr(" JVM state at this point:"); |
| for (int i = _depth; i >= 1; i--) { |
| tty->print_cr(" %d) %s", i, jvms()->of_depth(i)->method()->name()->as_utf8()); |
| } |
| } |
| #endif |
| return false; // Reached end of inlining |
| } |
| |
| // Acquire method holder as java.lang.Class |
| ciInstanceKlass* caller_klass = caller_jvms->method()->holder(); |
| ciInstance* caller_mirror = caller_klass->java_mirror(); |
| // Push this as a constant |
| push(makecon(TypeInstPtr::make(caller_mirror))); |
| #ifndef PRODUCT |
| if ((PrintIntrinsics || PrintInlining || PrintOptoInlining) && Verbose) { |
| tty->print_cr(" Succeeded: caller = %s.%s, caller depth = %d, depth = %d", caller_klass->name()->as_utf8(), caller_jvms->method()->name()->as_utf8(), caller_depth_type->get_con(), _depth); |
| tty->print_cr(" JVM state at this point:"); |
| for (int i = _depth; i >= 1; i--) { |
| tty->print_cr(" %d) %s", i, jvms()->of_depth(i)->method()->name()->as_utf8()); |
| } |
| } |
| #endif |
| return true; |
| } |
| |
| // Helper routine for above |
| bool LibraryCallKit::is_method_invoke_or_aux_frame(JVMState* jvms) { |
| ciMethod* method = jvms->method(); |
| |
| // Is this the Method.invoke method itself? |
| if (method->intrinsic_id() == vmIntrinsics::_invoke) |
| return true; |
| |
| // Is this a helper, defined somewhere underneath MethodAccessorImpl. |
| ciKlass* k = method->holder(); |
| if (k->is_instance_klass()) { |
| ciInstanceKlass* ik = k->as_instance_klass(); |
| for (; ik != NULL; ik = ik->super()) { |
| if (ik->name() == ciSymbol::sun_reflect_MethodAccessorImpl() && |
| ik == env()->find_system_klass(ik->name())) { |
| return true; |
| } |
| } |
| } |
| else if (method->is_method_handle_adapter()) { |
| // This is an internal adapter frame from the MethodHandleCompiler -- skip it |
| return true; |
| } |
| |
| return false; |
| } |
| |
| static int value_field_offset = -1; // offset of the "value" field of AtomicLongCSImpl. This is needed by |
| // inline_native_AtomicLong_attemptUpdate() but it has no way of |
| // computing it since there is no lookup field by name function in the |
| // CI interface. This is computed and set by inline_native_AtomicLong_get(). |
| // Using a static variable here is safe even if we have multiple compilation |
| // threads because the offset is constant. At worst the same offset will be |
| // computed and stored multiple |
| |
| bool LibraryCallKit::inline_native_AtomicLong_get() { |
| // Restore the stack and pop off the argument |
| _sp+=1; |
| Node *obj = pop(); |
| |
| // get the offset of the "value" field. Since the CI interfaces |
| // does not provide a way to look up a field by name, we scan the bytecodes |
| // to get the field index. We expect the first 2 instructions of the method |
| // to be: |
| // 0 aload_0 |
| // 1 getfield "value" |
| ciMethod* method = callee(); |
| if (value_field_offset == -1) |
| { |
| ciField* value_field; |
| ciBytecodeStream iter(method); |
| Bytecodes::Code bc = iter.next(); |
| |
| if ((bc != Bytecodes::_aload_0) && |
| ((bc != Bytecodes::_aload) || (iter.get_index() != 0))) |
| return false; |
| bc = iter.next(); |
| if (bc != Bytecodes::_getfield) |
| return false; |
| bool ignore; |
| value_field = iter.get_field(ignore); |
| value_field_offset = value_field->offset_in_bytes(); |
| } |
| |
| // Null check without removing any arguments. |
| _sp++; |
| obj = do_null_check(obj, T_OBJECT); |
| _sp--; |
| // Check for locking null object |
| if (stopped()) return true; |
| |
| Node *adr = basic_plus_adr(obj, obj, value_field_offset); |
| const TypePtr *adr_type = _gvn.type(adr)->is_ptr(); |
| int alias_idx = C->get_alias_index(adr_type); |
| |
| Node *result = _gvn.transform(new (C, 3) LoadLLockedNode(control(), memory(alias_idx), adr)); |
| |
| push_pair(result); |
| |
| return true; |
| } |
| |
| bool LibraryCallKit::inline_native_AtomicLong_attemptUpdate() { |
| // Restore the stack and pop off the arguments |
| _sp+=5; |
| Node *newVal = pop_pair(); |
| Node *oldVal = pop_pair(); |
| Node *obj = pop(); |
| |
| // we need the offset of the "value" field which was computed when |
| // inlining the get() method. Give up if we don't have it. |
| if (value_field_offset == -1) |
| return false; |
| |
| // Null check without removing any arguments. |
| _sp+=5; |
| obj = do_null_check(obj, T_OBJECT); |
| _sp-=5; |
| // Check for locking null object |
| if (stopped()) return true; |
| |
| Node *adr = basic_plus_adr(obj, obj, value_field_offset); |
| const TypePtr *adr_type = _gvn.type(adr)->is_ptr(); |
| int alias_idx = C->get_alias_index(adr_type); |
| |
| Node *cas = _gvn.transform(new (C, 5) StoreLConditionalNode(control(), memory(alias_idx), adr, newVal, oldVal)); |
| Node *store_proj = _gvn.transform( new (C, 1) SCMemProjNode(cas)); |
| set_memory(store_proj, alias_idx); |
| Node *bol = _gvn.transform( new (C, 2) BoolNode( cas, BoolTest::eq ) ); |
| |
| Node *result; |
| // CMove node is not used to be able fold a possible check code |
| // after attemptUpdate() call. This code could be transformed |
| // into CMove node by loop optimizations. |
| { |
| RegionNode *r = new (C, 3) RegionNode(3); |
| result = new (C, 3) PhiNode(r, TypeInt::BOOL); |
| |
| Node *iff = create_and_xform_if(control(), bol, PROB_FAIR, COUNT_UNKNOWN); |
| Node *iftrue = opt_iff(r, iff); |
| r->init_req(1, iftrue); |
| result->init_req(1, intcon(1)); |
| result->init_req(2, intcon(0)); |
| |
| set_control(_gvn.transform(r)); |
| record_for_igvn(r); |
| |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| } |
| |
| push(_gvn.transform(result)); |
| return true; |
| } |
| |
| bool LibraryCallKit::inline_fp_conversions(vmIntrinsics::ID id) { |
| // restore the arguments |
| _sp += arg_size(); |
| |
| switch (id) { |
| case vmIntrinsics::_floatToRawIntBits: |
| push(_gvn.transform( new (C, 2) MoveF2INode(pop()))); |
| break; |
| |
| case vmIntrinsics::_intBitsToFloat: |
| push(_gvn.transform( new (C, 2) MoveI2FNode(pop()))); |
| break; |
| |
| case vmIntrinsics::_doubleToRawLongBits: |
| push_pair(_gvn.transform( new (C, 2) MoveD2LNode(pop_pair()))); |
| break; |
| |
| case vmIntrinsics::_longBitsToDouble: |
| push_pair(_gvn.transform( new (C, 2) MoveL2DNode(pop_pair()))); |
| break; |
| |
| case vmIntrinsics::_doubleToLongBits: { |
| Node* value = pop_pair(); |
| |
| // two paths (plus control) merge in a wood |
| RegionNode *r = new (C, 3) RegionNode(3); |
| Node *phi = new (C, 3) PhiNode(r, TypeLong::LONG); |
| |
| Node *cmpisnan = _gvn.transform( new (C, 3) CmpDNode(value, value)); |
| // Build the boolean node |
| Node *bolisnan = _gvn.transform( new (C, 2) BoolNode( cmpisnan, BoolTest::ne ) ); |
| |
| // Branch either way. |
| // NaN case is less traveled, which makes all the difference. |
| IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); |
| Node *opt_isnan = _gvn.transform(ifisnan); |
| assert( opt_isnan->is_If(), "Expect an IfNode"); |
| IfNode *opt_ifisnan = (IfNode*)opt_isnan; |
| Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(opt_ifisnan) ); |
| |
| set_control(iftrue); |
| |
| static const jlong nan_bits = CONST64(0x7ff8000000000000); |
| Node *slow_result = longcon(nan_bits); // return NaN |
| phi->init_req(1, _gvn.transform( slow_result )); |
| r->init_req(1, iftrue); |
| |
| // Else fall through |
| Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(opt_ifisnan) ); |
| set_control(iffalse); |
| |
| phi->init_req(2, _gvn.transform( new (C, 2) MoveD2LNode(value))); |
| r->init_req(2, iffalse); |
| |
| // Post merge |
| set_control(_gvn.transform(r)); |
| record_for_igvn(r); |
| |
| Node* result = _gvn.transform(phi); |
| assert(result->bottom_type()->isa_long(), "must be"); |
| push_pair(result); |
| |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| break; |
| } |
| |
| case vmIntrinsics::_floatToIntBits: { |
| Node* value = pop(); |
| |
| // two paths (plus control) merge in a wood |
| RegionNode *r = new (C, 3) RegionNode(3); |
| Node *phi = new (C, 3) PhiNode(r, TypeInt::INT); |
| |
| Node *cmpisnan = _gvn.transform( new (C, 3) CmpFNode(value, value)); |
| // Build the boolean node |
| Node *bolisnan = _gvn.transform( new (C, 2) BoolNode( cmpisnan, BoolTest::ne ) ); |
| |
| // Branch either way. |
| // NaN case is less traveled, which makes all the difference. |
| IfNode *ifisnan = create_and_xform_if(control(), bolisnan, PROB_STATIC_FREQUENT, COUNT_UNKNOWN); |
| Node *opt_isnan = _gvn.transform(ifisnan); |
| assert( opt_isnan->is_If(), "Expect an IfNode"); |
| IfNode *opt_ifisnan = (IfNode*)opt_isnan; |
| Node *iftrue = _gvn.transform( new (C, 1) IfTrueNode(opt_ifisnan) ); |
| |
| set_control(iftrue); |
| |
| static const jint nan_bits = 0x7fc00000; |
| Node *slow_result = makecon(TypeInt::make(nan_bits)); // return NaN |
| phi->init_req(1, _gvn.transform( slow_result )); |
| r->init_req(1, iftrue); |
| |
| // Else fall through |
| Node *iffalse = _gvn.transform( new (C, 1) IfFalseNode(opt_ifisnan) ); |
| set_control(iffalse); |
| |
| phi->init_req(2, _gvn.transform( new (C, 2) MoveF2INode(value))); |
| r->init_req(2, iffalse); |
| |
| // Post merge |
| set_control(_gvn.transform(r)); |
| record_for_igvn(r); |
| |
| Node* result = _gvn.transform(phi); |
| assert(result->bottom_type()->isa_int(), "must be"); |
| push(result); |
| |
| C->set_has_split_ifs(true); // Has chance for split-if optimization |
| |
| break; |
| } |
| |
| default: |
| ShouldNotReachHere(); |
| } |
| |
| return true; |
| } |
| |
| #ifdef _LP64 |
| #define XTOP ,top() /*additional argument*/ |
| #else //_LP64 |
| #define XTOP /*no additional argument*/ |
| #endif //_LP64 |
| |
| //----------------------inline_unsafe_copyMemory------------------------- |
| bool LibraryCallKit::inline_unsafe_copyMemory() { |
| if (callee()->is_static()) return false; // caller must have the capability! |
| int nargs = 1 + 5 + 3; // 5 args: (src: ptr,off, dst: ptr,off, size) |
| assert(signature()->size() == nargs-1, "copy has 5 arguments"); |
| null_check_receiver(callee()); // check then ignore argument(0) |
| if (stopped()) return true; |
| |
| C->set_has_unsafe_access(true); // Mark eventual nmethod as "unsafe". |
| |
| Node* src_ptr = argument(1); |
| Node* src_off = ConvL2X(argument(2)); |
| assert(argument(3)->is_top(), "2nd half of long"); |
| Node* dst_ptr = argument(4); |
| Node* dst_off = ConvL2X(argument(5)); |
| assert(argument(6)->is_top(), "2nd half of long"); |
| Node* size = ConvL2X(argument(7)); |
| assert(argument(8)->is_top(), "2nd half of long"); |
| |
| assert(Unsafe_field_offset_to_byte_offset(11) == 11, |
| "fieldOffset must be byte-scaled"); |
| |
| Node* src = make_unsafe_address(src_ptr, src_off); |
| Node* dst = make_unsafe_address(dst_ptr, dst_off); |
| |
| // Conservatively insert a memory barrier on all memory slices. |
| // Do not let writes of the copy source or destination float below the copy. |
| insert_mem_bar(Op_MemBarCPUOrder); |
| |
| // Call it. Note that the length argument is not scaled. |
| make_runtime_call(RC_LEAF|RC_NO_FP, |
| OptoRuntime::fast_arraycopy_Type(), |
| StubRoutines::unsafe_arraycopy(), |
| "unsafe_arraycopy", |
| TypeRawPtr::BOTTOM, |
| src, dst, size XTOP); |
| |
| // Do not let reads of the copy destination float above the copy. |
| insert_mem_bar(Op_MemBarCPUOrder); |
| |
| return true; |
| } |
| |
| //------------------------clone_coping----------------------------------- |
| // Helper function for inline_native_clone. |
| void LibraryCallKit::copy_to_clone(Node* obj, Node* alloc_obj, Node* obj_size, bool is_array, bool card_mark) { |
| assert(obj_size != NULL, ""); |
| Node* raw_obj = alloc_obj->in(1); |
| assert(alloc_obj->is_CheckCastPP() && raw_obj->is_Proj() && raw_obj->in(0)->is_Allocate(), ""); |
| |
| AllocateNode* alloc = NULL; |
| if (ReduceBulkZeroing) { |
| // We will be completely responsible for initializing this object - |
| // mark Initialize node as complete. |
| alloc = AllocateNode::Ideal_allocation(alloc_obj, &_gvn); |
| // The object was just allocated - there should be no any stores! |
| guarantee(alloc != NULL && alloc->maybe_set_complete(&_gvn), ""); |
| // Mark as complete_with_arraycopy so that on AllocateNode |
| // expansion, we know this AllocateNode is initialized by an array |
| // copy and a StoreStore barrier exists after the array copy. |
| alloc->initialization()->set_complete_with_arraycopy(); |
| } |
| |
| // Copy the fastest available way. |
| // TODO: generate fields copies for small objects instead. |
| Node* src = obj; |
| Node* dest = alloc_obj; |
| Node* size = _gvn.transform(obj_size); |
| |
| // Exclude the header but include array length to copy by 8 bytes words. |
| // Can't use base_offset_in_bytes(bt) since basic type is unknown. |
| int base_off = is_array ? arrayOopDesc::length_offset_in_bytes() : |
| instanceOopDesc::base_offset_in_bytes(); |
| // base_off: |
| // 8 - 32-bit VM |
| // 12 - 64-bit VM, compressed oops |
| // 16 - 64-bit VM, normal oops |
| if (base_off % BytesPerLong != 0) { |
| assert(UseCompressedOops, ""); |
| if (is_array) { |
| // Exclude length to copy by 8 bytes words. |
| base_off += sizeof(int); |
| } else { |
| // Include klass to copy by 8 bytes words. |
| base_off = instanceOopDesc::klass_offset_in_bytes(); |
| } |
| assert(base_off % BytesPerLong == 0, "expect 8 bytes alignment"); |
| } |
| src = basic_plus_adr(src, base_off); |
| dest = basic_plus_adr(dest, base_off); |
| |
| // Compute the length also, if needed: |
| Node* countx = size; |
| countx = _gvn.transform( new (C, 3) SubXNode(countx, MakeConX(base_off)) ); |
| countx = _gvn.transform( new (C, 3) URShiftXNode(countx, intcon(LogBytesPerLong) )); |
| |
| const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM; |
| bool disjoint_bases = true; |
| generate_unchecked_arraycopy(raw_adr_type, T_LONG, disjoint_bases, |
| src, NULL, dest, NULL, countx, |
| /*dest_uninitialized*/true); |
| |
| // If necessary, emit some card marks afterwards. (Non-arrays only.) |
| if (card_mark) { |
| assert(!is_array, ""); |
| // Put in store barrier for any and all oops we are sticking |
| // into this object. (We could avoid this if we could prove |
| // that the object type contains no oop fields at all.) |
| Node* no_particular_value = NULL; |
| Node* no_particular_field = NULL; |
| int raw_adr_idx = Compile::AliasIdxRaw; |
| post_barrier(control(), |
| memory(raw_adr_type), |
| alloc_obj, |
| no_particular_field, |
| raw_adr_idx, |
| no_particular_value, |
| T_OBJECT, |
| false); |
| } |
| |
| // Do not let reads from the cloned object float above the arraycopy. |
| if (alloc != NULL) { |
| // Do not let stores that initialize this object be reordered with |
| // a subsequent store that would make this object accessible by |
| // other threads. |
| // Record what AllocateNode this StoreStore protects so that |
| // escape analysis can go from the MemBarStoreStoreNode to the |
| // AllocateNode and eliminate the MemBarStoreStoreNode if possible |
| // based on the escape status of the AllocateNode. |
| insert_mem_bar(Op_MemBarStoreStore, alloc->proj_out(AllocateNode::RawAddress)); |
| } else { |
| insert_mem_bar(Op_MemBarCPUOrder); |
| } |
| } |
| |
| //------------------------inline_native_clone---------------------------- |
| // Here are the simple edge cases: |
| // null receiver => normal trap |
| // virtual and clone was overridden => slow path to out-of-line clone |
| // not cloneable or finalizer => slow path to out-of-line Object.clone |
| // |
| // The general case has two steps, allocation and copying. |
| // Allocation has two cases, and uses GraphKit::new_instance or new_array. |
| // |
| // Copying also has two cases, oop arrays and everything else. |
| // Oop arrays use arrayof_oop_arraycopy (same as System.arraycopy). |
| // Everything else uses the tight inline loop supplied by CopyArrayNode. |
| // |
| // These steps fold up nicely if and when the cloned object's klass |
| // can be sharply typed as an object array, a type array, or an instance. |
| // |
| bool LibraryCallKit::inline_native_clone(bool is_virtual) { |
| int nargs = 1; |
| PhiNode* result_val; |
| |
| //set the original stack and the reexecute bit for the interpreter to reexecute |
| //the bytecode that invokes Object.clone if deoptimization happens |
| { PreserveReexecuteState preexecs(this); |
| jvms()->set_should_reexecute(true); |
| |
| //null_check_receiver will adjust _sp (push and pop) |
| Node* obj = null_check_receiver(callee()); |
| if (stopped()) return true; |
| |
| _sp += nargs; |
| |
| Node* obj_klass = load_object_klass(obj); |
| const TypeKlassPtr* tklass = _gvn.type(obj_klass)->isa_klassptr(); |
| const TypeOopPtr* toop = ((tklass != NULL) |
| ? tklass->as_instance_type() |
| : TypeInstPtr::NOTNULL); |
| |
| // Conservatively insert a memory barrier on all memory slices. |
| // Do not let writes into the original float below the clone. |
| insert_mem_bar(Op_MemBarCPUOrder); |
| |
| // paths into result_reg: |
| enum { |
| _slow_path = 1, // out-of-line call to clone method (virtual or not) |
| _objArray_path, // plain array allocation, plus arrayof_oop_arraycopy |
| _array_path, // plain array allocation, plus arrayof_long_arraycopy |
| _instance_path, // plain instance allocation, plus arrayof_long_arraycopy |
| PATH_LIMIT |
| }; |
| RegionNode* result_reg = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); |
| result_val = new(C, PATH_LIMIT) PhiNode(result_reg, |
| TypeInstPtr::NOTNULL); |
| PhiNode* result_i_o = new(C, PATH_LIMIT) PhiNode(result_reg, Type::ABIO); |
| PhiNode* result_mem = new(C, PATH_LIMIT) PhiNode(result_reg, Type::MEMORY, |
| TypePtr::BOTTOM); |
| record_for_igvn(result_reg); |
| |
| const TypePtr* raw_adr_type = TypeRawPtr::BOTTOM; |
| int raw_adr_idx = Compile::AliasIdxRaw; |
| |
| Node* array_ctl = generate_array_guard(obj_klass, (RegionNode*)NULL); |
| if (array_ctl != NULL) { |
| // It's an array. |
| PreserveJVMState pjvms(this); |
| set_control(array_ctl); |
| Node* obj_length = load_array_length(obj); |
| Node* obj_size = NULL; |
| Node* alloc_obj = new_array(obj_klass, obj_length, 0, &obj_size); |
| |
| if (!use_ReduceInitialCardMarks()) { |
| // If it is an oop array, it requires very special treatment, |
| // because card marking is required on each card of the array. |
| Node* is_obja = generate_objArray_guard(obj_klass, (RegionNode*)NULL); |
| if (is_obja != NULL) { |
| PreserveJVMState pjvms2(this); |
| set_control(is_obja); |
| // Generate a direct call to the right arraycopy function(s). |
| bool disjoint_bases = true; |
| bool length_never_negative = true; |
| generate_arraycopy(TypeAryPtr::OOPS, T_OBJECT, |
| obj, intcon(0), alloc_obj, intcon(0), |
| obj_length, |
| disjoint_bases, length_never_negative); |
| result_reg->init_req(_objArray_path, control()); |
| result_val->init_req(_objArray_path, alloc_obj); |
| result_i_o ->set_req(_objArray_path, i_o()); |
| result_mem ->set_req(_objArray_path, reset_memory()); |
| } |
| } |
| // Otherwise, there are no card marks to worry about. |
| // (We can dispense with card marks if we know the allocation |
| // comes out of eden (TLAB)... In fact, ReduceInitialCardMarks |
| // causes the non-eden paths to take compensating steps to |
| // simulate a fresh allocation, so that no further |
| // card marks are required in compiled code to initialize |
| // the object.) |
| |
| if (!stopped()) { |
| copy_to_clone(obj, alloc_obj, obj_size, true, false); |
| |
| // Present the results of the copy. |
| result_reg->init_req(_array_path, control()); |
| result_val->init_req(_array_path, alloc_obj); |
| result_i_o ->set_req(_array_path, i_o()); |
| result_mem ->set_req(_array_path, reset_memory()); |
| } |
| } |
| |
| // We only go to the instance fast case code if we pass a number of guards. |
| // The paths which do not pass are accumulated in the slow_region. |
| RegionNode* slow_region = new (C, 1) RegionNode(1); |
| record_for_igvn(slow_region); |
| if (!stopped()) { |
| // It's an instance (we did array above). Make the slow-path tests. |
| // If this is a virtual call, we generate a funny guard. We grab |
| // the vtable entry corresponding to clone() from the target object. |
| // If the target method which we are calling happens to be the |
| // Object clone() method, we pass the guard. We do not need this |
| // guard for non-virtual calls; the caller is known to be the native |
| // Object clone(). |
| if (is_virtual) { |
| generate_virtual_guard(obj_klass, slow_region); |
| } |
| |
| // The object must be cloneable and must not have a finalizer. |
| // Both of these conditions may be checked in a single test. |
| // We could optimize the cloneable test further, but we don't care. |
| generate_access_flags_guard(obj_klass, |
| // Test both conditions: |
| JVM_ACC_IS_CLONEABLE | JVM_ACC_HAS_FINALIZER, |
| // Must be cloneable but not finalizer: |
| JVM_ACC_IS_CLONEABLE, |
| slow_region); |
| } |
| |
| if (!stopped()) { |
| // It's an instance, and it passed the slow-path tests. |
| PreserveJVMState pjvms(this); |
| Node* obj_size = NULL; |
| Node* alloc_obj = new_instance(obj_klass, NULL, &obj_size); |
| |
| copy_to_clone(obj, alloc_obj, obj_size, false, !use_ReduceInitialCardMarks()); |
| |
| // Present the results of the slow call. |
| result_reg->init_req(_instance_path, control()); |
| result_val->init_req(_instance_path, alloc_obj); |
| result_i_o ->set_req(_instance_path, i_o()); |
| result_mem ->set_req(_instance_path, reset_memory()); |
| } |
| |
| // Generate code for the slow case. We make a call to clone(). |
| set_control(_gvn.transform(slow_region)); |
| if (!stopped()) { |
| PreserveJVMState pjvms(this); |
| CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_clone, is_virtual); |
| Node* slow_result = set_results_for_java_call(slow_call); |
| // this->control() comes from set_results_for_java_call |
| result_reg->init_req(_slow_path, control()); |
| result_val->init_req(_slow_path, slow_result); |
| result_i_o ->set_req(_slow_path, i_o()); |
| result_mem ->set_req(_slow_path, reset_memory()); |
| } |
| |
| // Return the combined state. |
| set_control( _gvn.transform(result_reg) ); |
| set_i_o( _gvn.transform(result_i_o) ); |
| set_all_memory( _gvn.transform(result_mem) ); |
| } //original reexecute and sp are set back here |
| |
| push(_gvn.transform(result_val)); |
| |
| return true; |
| } |
| |
| //------------------------------basictype2arraycopy---------------------------- |
| address LibraryCallKit::basictype2arraycopy(BasicType t, |
| Node* src_offset, |
| Node* dest_offset, |
| bool disjoint_bases, |
| const char* &name, |
| bool dest_uninitialized) { |
| const TypeInt* src_offset_inttype = gvn().find_int_type(src_offset);; |
| const TypeInt* dest_offset_inttype = gvn().find_int_type(dest_offset);; |
| |
| bool aligned = false; |
| bool disjoint = disjoint_bases; |
| |
| // if the offsets are the same, we can treat the memory regions as |
| // disjoint, because either the memory regions are in different arrays, |
| // or they are identical (which we can treat as disjoint.) We can also |
| // treat a copy with a destination index less that the source index |
| // as disjoint since a low->high copy will work correctly in this case. |
| if (src_offset_inttype != NULL && src_offset_inttype->is_con() && |
| dest_offset_inttype != NULL && dest_offset_inttype->is_con()) { |
| // both indices are constants |
| int s_offs = src_offset_inttype->get_con(); |
| int d_offs = dest_offset_inttype->get_con(); |
| int element_size = type2aelembytes(t); |
| aligned = ((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) && |
| ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0); |
| if (s_offs >= d_offs) disjoint = true; |
| } else if (src_offset == dest_offset && src_offset != NULL) { |
| // This can occur if the offsets are identical non-constants. |
| disjoint = true; |
| } |
| |
| return StubRoutines::select_arraycopy_function(t, aligned, disjoint, name, dest_uninitialized); |
| } |
| |
| |
| //------------------------------inline_arraycopy----------------------- |
| bool LibraryCallKit::inline_arraycopy() { |
| // Restore the stack and pop off the arguments. |
| int nargs = 5; // 2 oops, 3 ints, no size_t or long |
| assert(callee()->signature()->size() == nargs, "copy has 5 arguments"); |
| |
| Node *src = argument(0); |
| Node *src_offset = argument(1); |
| Node *dest = argument(2); |
| Node *dest_offset = argument(3); |
| Node *length = argument(4); |
| |
| // Compile time checks. If any of these checks cannot be verified at compile time, |
| // we do not make a fast path for this call. Instead, we let the call remain as it |
| // is. The checks we choose to mandate at compile time are: |
| // |
| // (1) src and dest are arrays. |
| const Type* src_type = src->Value(&_gvn); |
| const Type* dest_type = dest->Value(&_gvn); |
| const TypeAryPtr* top_src = src_type->isa_aryptr(); |
| const TypeAryPtr* top_dest = dest_type->isa_aryptr(); |
| if (top_src == NULL || top_src->klass() == NULL || |
| top_dest == NULL || top_dest->klass() == NULL) { |
| // Conservatively insert a memory barrier on all memory slices. |
| // Do not let writes into the source float below the arraycopy. |
| insert_mem_bar(Op_MemBarCPUOrder); |
| |
| // Call StubRoutines::generic_arraycopy stub. |
| generate_arraycopy(TypeRawPtr::BOTTOM, T_CONFLICT, |
| src, src_offset, dest, dest_offset, length); |
| |
| // Do not let reads from the destination float above the arraycopy. |
| // Since we cannot type the arrays, we don't know which slices |
| // might be affected. We could restrict this barrier only to those |
| // memory slices which pertain to array elements--but don't bother. |
| if (!InsertMemBarAfterArraycopy) |
| // (If InsertMemBarAfterArraycopy, there is already one in place.) |
| insert_mem_bar(Op_MemBarCPUOrder); |
| return true; |
| } |
| |
| // (2) src and dest arrays must have elements of the same BasicType |
| // Figure out the size and type of the elements we will be copying. |
| BasicType src_elem = top_src->klass()->as_array_klass()->element_type()->basic_type(); |
| BasicType dest_elem = top_dest->klass()->as_array_klass()->element_type()->basic_type(); |
| if (src_elem == T_ARRAY) src_elem = T_OBJECT; |
| if (dest_elem == T_ARRAY) dest_elem = T_OBJECT; |
| |
| if (src_elem != dest_elem || dest_elem == T_VOID) { |
| // The component types are not the same or are not recognized. Punt. |
| // (But, avoid the native method wrapper to JVM_ArrayCopy.) |
| generate_slow_arraycopy(TypePtr::BOTTOM, |
| src, src_offset, dest, dest_offset, length, |
| /*dest_uninitialized*/false); |
| return true; |
| } |
| |
| //--------------------------------------------------------------------------- |
| // We will make a fast path for this call to arraycopy. |
| |
| // We have the following tests left to perform: |
| // |
| // (3) src and dest must not be null. |
| // (4) src_offset must not be negative. |
| // (5) dest_offset must not be negative. |
| // (6) length must not be negative. |
| // (7) src_offset + length must not exceed length of src. |
| // (8) dest_offset + length must not exceed length of dest. |
| // (9) each element of an oop array must be assignable |
| |
| RegionNode* slow_region = new (C, 1) RegionNode(1); |
| record_for_igvn(slow_region); |
| |
| // (3) operands must not be null |
| // We currently perform our null checks with the do_null_check routine. |
| // This means that the null exceptions will be reported in the caller |
| // rather than (correctly) reported inside of the native arraycopy call. |
| // This should be corrected, given time. We do our null check with the |
| // stack pointer restored. |
| _sp += nargs; |
| src = do_null_check(src, T_ARRAY); |
| dest = do_null_check(dest, T_ARRAY); |
| _sp -= nargs; |
| |
| // (4) src_offset must not be negative. |
| generate_negative_guard(src_offset, slow_region); |
| |
| // (5) dest_offset must not be negative. |
| generate_negative_guard(dest_offset, slow_region); |
| |
| // (6) length must not be negative (moved to generate_arraycopy()). |
| // generate_negative_guard(length, slow_region); |
| |
| // (7) src_offset + length must not exceed length of src. |
| generate_limit_guard(src_offset, length, |
| load_array_length(src), |
| slow_region); |
| |
| // (8) dest_offset + length must not exceed length of dest. |
| generate_limit_guard(dest_offset, length, |
| load_array_length(dest), |
| slow_region); |
| |
| // (9) each element of an oop array must be assignable |
| // The generate_arraycopy subroutine checks this. |
| |
| // This is where the memory effects are placed: |
| const TypePtr* adr_type = TypeAryPtr::get_array_body_type(dest_elem); |
| generate_arraycopy(adr_type, dest_elem, |
| src, src_offset, dest, dest_offset, length, |
| false, false, slow_region); |
| |
| return true; |
| } |
| |
| //-----------------------------generate_arraycopy---------------------- |
| // Generate an optimized call to arraycopy. |
| // Caller must guard against non-arrays. |
| // Caller must determine a common array basic-type for both arrays. |
| // Caller must validate offsets against array bounds. |
| // The slow_region has already collected guard failure paths |
| // (such as out of bounds length or non-conformable array types). |
| // The generated code has this shape, in general: |
| // |
| // if (length == 0) return // via zero_path |
| // slowval = -1 |
| // if (types unknown) { |
| // slowval = call generic copy loop |
| // if (slowval == 0) return // via checked_path |
| // } else if (indexes in bounds) { |
| // if ((is object array) && !(array type check)) { |
| // slowval = call checked copy loop |
| // if (slowval == 0) return // via checked_path |
| // } else { |
| // call bulk copy loop |
| // return // via fast_path |
| // } |
| // } |
| // // adjust params for remaining work: |
| // if (slowval != -1) { |
| // n = -1^slowval; src_offset += n; dest_offset += n; length -= n |
| // } |
| // slow_region: |
| // call slow arraycopy(src, src_offset, dest, dest_offset, length) |
| // return // via slow_call_path |
| // |
| // This routine is used from several intrinsics: System.arraycopy, |
| // Object.clone (the array subcase), and Arrays.copyOf[Range]. |
| // |
| void |
| LibraryCallKit::generate_arraycopy(const TypePtr* adr_type, |
| BasicType basic_elem_type, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, |
| bool disjoint_bases, |
| bool length_never_negative, |
| RegionNode* slow_region) { |
| |
| if (slow_region == NULL) { |
| slow_region = new(C,1) RegionNode(1); |
| record_for_igvn(slow_region); |
| } |
| |
| Node* original_dest = dest; |
| AllocateArrayNode* alloc = NULL; // used for zeroing, if needed |
| bool dest_uninitialized = false; |
| |
| // See if this is the initialization of a newly-allocated array. |
| // If so, we will take responsibility here for initializing it to zero. |
| // (Note: Because tightly_coupled_allocation performs checks on the |
| // out-edges of the dest, we need to avoid making derived pointers |
| // from it until we have checked its uses.) |
| if (ReduceBulkZeroing |
| && !ZeroTLAB // pointless if already zeroed |
| && basic_elem_type != T_CONFLICT // avoid corner case |
| && !src->eqv_uncast(dest) |
| && ((alloc = tightly_coupled_allocation(dest, slow_region)) |
| != NULL) |
| && _gvn.find_int_con(alloc->in(AllocateNode::ALength), 1) > 0 |
| && alloc->maybe_set_complete(&_gvn)) { |
| // "You break it, you buy it." |
| InitializeNode* init = alloc->initialization(); |
| assert(init->is_complete(), "we just did this"); |
| init->set_complete_with_arraycopy(); |
| assert(dest->is_CheckCastPP(), "sanity"); |
| assert(dest->in(0)->in(0) == init, "dest pinned"); |
| adr_type = TypeRawPtr::BOTTOM; // all initializations are into raw memory |
| // From this point on, every exit path is responsible for |
| // initializing any non-copied parts of the object to zero. |
| // Also, if this flag is set we make sure that arraycopy interacts properly |
| // with G1, eliding pre-barriers. See CR 6627983. |
| dest_uninitialized = true; |
| } else { |
| // No zeroing elimination here. |
| alloc = NULL; |
| //original_dest = dest; |
| //dest_uninitialized = false; |
| } |
| |
| // Results are placed here: |
| enum { fast_path = 1, // normal void-returning assembly stub |
| checked_path = 2, // special assembly stub with cleanup |
| slow_call_path = 3, // something went wrong; call the VM |
| zero_path = 4, // bypass when length of copy is zero |
| bcopy_path = 5, // copy primitive array by 64-bit blocks |
| PATH_LIMIT = 6 |
| }; |
| RegionNode* result_region = new(C, PATH_LIMIT) RegionNode(PATH_LIMIT); |
| PhiNode* result_i_o = new(C, PATH_LIMIT) PhiNode(result_region, Type::ABIO); |
| PhiNode* result_memory = new(C, PATH_LIMIT) PhiNode(result_region, Type::MEMORY, adr_type); |
| record_for_igvn(result_region); |
| _gvn.set_type_bottom(result_i_o); |
| _gvn.set_type_bottom(result_memory); |
| assert(adr_type != TypePtr::BOTTOM, "must be RawMem or a T[] slice"); |
| |
| // The slow_control path: |
| Node* slow_control; |
| Node* slow_i_o = i_o(); |
| Node* slow_mem = memory(adr_type); |
| debug_only(slow_control = (Node*) badAddress); |
| |
| // Checked control path: |
| Node* checked_control = top(); |
| Node* checked_mem = NULL; |
| Node* checked_i_o = NULL; |
| Node* checked_value = NULL; |
| |
| if (basic_elem_type == T_CONFLICT) { |
| assert(!dest_uninitialized, ""); |
| Node* cv = generate_generic_arraycopy(adr_type, |
| src, src_offset, dest, dest_offset, |
| copy_length, dest_uninitialized); |
| if (cv == NULL) cv = intcon(-1); // failure (no stub available) |
| checked_control = control(); |
| checked_i_o = i_o(); |
| checked_mem = memory(adr_type); |
| checked_value = cv; |
| set_control(top()); // no fast path |
| } |
| |
| Node* not_pos = generate_nonpositive_guard(copy_length, length_never_negative); |
| if (not_pos != NULL) { |
| PreserveJVMState pjvms(this); |
| set_control(not_pos); |
| |
| // (6) length must not be negative. |
| if (!length_never_negative) { |
| generate_negative_guard(copy_length, slow_region); |
| } |
| |
| // copy_length is 0. |
| if (!stopped() && dest_uninitialized) { |
| Node* dest_length = alloc->in(AllocateNode::ALength); |
| if (copy_length->eqv_uncast(dest_length) |
| || _gvn.find_int_con(dest_length, 1) <= 0) { |
| // There is no zeroing to do. No need for a secondary raw memory barrier. |
| } else { |
| // Clear the whole thing since there are no source elements to copy. |
| generate_clear_array(adr_type, dest, basic_elem_type, |
| intcon(0), NULL, |
| alloc->in(AllocateNode::AllocSize)); |
| // Use a secondary InitializeNode as raw memory barrier. |
| // Currently it is needed only on this path since other |
| // paths have stub or runtime calls as raw memory barriers. |
| InitializeNode* init = insert_mem_bar_volatile(Op_Initialize, |
| Compile::AliasIdxRaw, |
| top())->as_Initialize(); |
| init->set_complete(&_gvn); // (there is no corresponding AllocateNode) |
| } |
| } |
| |
| // Present the results of the fast call. |
| result_region->init_req(zero_path, control()); |
| result_i_o ->init_req(zero_path, i_o()); |
| result_memory->init_req(zero_path, memory(adr_type)); |
| } |
| |
| if (!stopped() && dest_uninitialized) { |
| // We have to initialize the *uncopied* part of the array to zero. |
| // The copy destination is the slice dest[off..off+len]. The other slices |
| // are dest_head = dest[0..off] and dest_tail = dest[off+len..dest.length]. |
| Node* dest_size = alloc->in(AllocateNode::AllocSize); |
| Node* dest_length = alloc->in(AllocateNode::ALength); |
| Node* dest_tail = _gvn.transform( new(C,3) AddINode(dest_offset, |
| copy_length) ); |
| |
| // If there is a head section that needs zeroing, do it now. |
| if (find_int_con(dest_offset, -1) != 0) { |
| generate_clear_array(adr_type, dest, basic_elem_type, |
| intcon(0), dest_offset, |
| NULL); |
| } |
| |
| // Next, perform a dynamic check on the tail length. |
| // It is often zero, and we can win big if we prove this. |
| // There are two wins: Avoid generating the ClearArray |
| // with its attendant messy index arithmetic, and upgrade |
| // the copy to a more hardware-friendly word size of 64 bits. |
| Node* tail_ctl = NULL; |
| if (!stopped() && !dest_tail->eqv_uncast(dest_length)) { |
| Node* cmp_lt = _gvn.transform( new(C,3) CmpINode(dest_tail, dest_length) ); |
| Node* bol_lt = _gvn.transform( new(C,2) BoolNode(cmp_lt, BoolTest::lt) ); |
| tail_ctl = generate_slow_guard(bol_lt, NULL); |
| assert(tail_ctl != NULL || !stopped(), "must be an outcome"); |
| } |
| |
| // At this point, let's assume there is no tail. |
| if (!stopped() && alloc != NULL && basic_elem_type != T_OBJECT) { |
| // There is no tail. Try an upgrade to a 64-bit copy. |
| bool didit = false; |
| { PreserveJVMState pjvms(this); |
| didit = generate_block_arraycopy(adr_type, basic_elem_type, alloc, |
| src, src_offset, dest, dest_offset, |
| dest_size, dest_uninitialized); |
| if (didit) { |
| // Present the results of the block-copying fast call. |
| result_region->init_req(bcopy_path, control()); |
| result_i_o ->init_req(bcopy_path, i_o()); |
| result_memory->init_req(bcopy_path, memory(adr_type)); |
| } |
| } |
| if (didit) |
| set_control(top()); // no regular fast path |
| } |
| |
| // Clear the tail, if any. |
| if (tail_ctl != NULL) { |
| Node* notail_ctl = stopped() ? NULL : control(); |
| set_control(tail_ctl); |
| if (notail_ctl == NULL) { |
| generate_clear_array(adr_type, dest, basic_elem_type, |
| dest_tail, NULL, |
| dest_size); |
| } else { |
| // Make a local merge. |
| Node* done_ctl = new(C,3) RegionNode(3); |
| Node* done_mem = new(C,3) PhiNode(done_ctl, Type::MEMORY, adr_type); |
| done_ctl->init_req(1, notail_ctl); |
| done_mem->init_req(1, memory(adr_type)); |
| generate_clear_array(adr_type, dest, basic_elem_type, |
| dest_tail, NULL, |
| dest_size); |
| done_ctl->init_req(2, control()); |
| done_mem->init_req(2, memory(adr_type)); |
| set_control( _gvn.transform(done_ctl) ); |
| set_memory( _gvn.transform(done_mem), adr_type ); |
| } |
| } |
| } |
| |
| BasicType copy_type = basic_elem_type; |
| assert(basic_elem_type != T_ARRAY, "caller must fix this"); |
| if (!stopped() && copy_type == T_OBJECT) { |
| // If src and dest have compatible element types, we can copy bits. |
| // Types S[] and D[] are compatible if D is a supertype of S. |
| // |
| // If they are not, we will use checked_oop_disjoint_arraycopy, |
| // which performs a fast optimistic per-oop check, and backs off |
| // further to JVM_ArrayCopy on the first per-oop check that fails. |
| // (Actually, we don't move raw bits only; the GC requires card marks.) |
| |
| // Get the klassOop for both src and dest |
| Node* src_klass = load_object_klass(src); |
| Node* dest_klass = load_object_klass(dest); |
| |
| // Generate the subtype check. |
| // This might fold up statically, or then again it might not. |
| // |
| // Non-static example: Copying List<String>.elements to a new String[]. |
| // The backing store for a List<String> is always an Object[], |
| // but its elements are always type String, if the generic types |
| // are correct at the source level. |
| // |
| // Test S[] against D[], not S against D, because (probably) |
| // the secondary supertype cache is less busy for S[] than S. |
| // This usually only matters when D is an interface. |
| Node* not_subtype_ctrl = gen_subtype_check(src_klass, dest_klass); |
| // Plug failing path into checked_oop_disjoint_arraycopy |
| if (not_subtype_ctrl != top()) { |
| PreserveJVMState pjvms(this); |
| set_control(not_subtype_ctrl); |
| // (At this point we can assume disjoint_bases, since types differ.) |
| int ek_offset = in_bytes(objArrayKlass::element_klass_offset()); |
| Node* p1 = basic_plus_adr(dest_klass, ek_offset); |
| Node* n1 = LoadKlassNode::make(_gvn, immutable_memory(), p1, TypeRawPtr::BOTTOM); |
| Node* dest_elem_klass = _gvn.transform(n1); |
| Node* cv = generate_checkcast_arraycopy(adr_type, |
| dest_elem_klass, |
| src, src_offset, dest, dest_offset, |
| ConvI2X(copy_length), dest_uninitialized); |
| if (cv == NULL) cv = intcon(-1); // failure (no stub available) |
| checked_control = control(); |
| checked_i_o = i_o(); |
| checked_mem = memory(adr_type); |
| checked_value = cv; |
| } |
| // At this point we know we do not need type checks on oop stores. |
| |
| // Let's see if we need card marks: |
| if (alloc != NULL && use_ReduceInitialCardMarks()) { |
| // If we do not need card marks, copy using the jint or jlong stub. |
| copy_type = LP64_ONLY(UseCompressedOops ? T_INT : T_LONG) NOT_LP64(T_INT); |
| assert(type2aelembytes(basic_elem_type) == type2aelembytes(copy_type), |
| "sizes agree"); |
| } |
| } |
| |
| if (!stopped()) { |
| // Generate the fast path, if possible. |
| PreserveJVMState pjvms(this); |
| generate_unchecked_arraycopy(adr_type, copy_type, disjoint_bases, |
| src, src_offset, dest, dest_offset, |
| ConvI2X(copy_length), dest_uninitialized); |
| |
| // Present the results of the fast call. |
| result_region->init_req(fast_path, control()); |
| result_i_o ->init_req(fast_path, i_o()); |
| result_memory->init_req(fast_path, memory(adr_type)); |
| } |
| |
| // Here are all the slow paths up to this point, in one bundle: |
| slow_control = top(); |
| if (slow_region != NULL) |
| slow_control = _gvn.transform(slow_region); |
| debug_only(slow_region = (RegionNode*)badAddress); |
| |
| set_control(checked_control); |
| if (!stopped()) { |
| // Clean up after the checked call. |
| // The returned value is either 0 or -1^K, |
| // where K = number of partially transferred array elements. |
| Node* cmp = _gvn.transform( new(C, 3) CmpINode(checked_value, intcon(0)) ); |
| Node* bol = _gvn.transform( new(C, 2) BoolNode(cmp, BoolTest::eq) ); |
| IfNode* iff = create_and_map_if(control(), bol, PROB_MAX, COUNT_UNKNOWN); |
| |
| // If it is 0, we are done, so transfer to the end. |
| Node* checks_done = _gvn.transform( new(C, 1) IfTrueNode(iff) ); |
| result_region->init_req(checked_path, checks_done); |
| result_i_o ->init_req(checked_path, checked_i_o); |
| result_memory->init_req(checked_path, checked_mem); |
| |
| // If it is not zero, merge into the slow call. |
| set_control( _gvn.transform( new(C, 1) IfFalseNode(iff) )); |
| RegionNode* slow_reg2 = new(C, 3) RegionNode(3); |
| PhiNode* slow_i_o2 = new(C, 3) PhiNode(slow_reg2, Type::ABIO); |
| PhiNode* slow_mem2 = new(C, 3) PhiNode(slow_reg2, Type::MEMORY, adr_type); |
| record_for_igvn(slow_reg2); |
| slow_reg2 ->init_req(1, slow_control); |
| slow_i_o2 ->init_req(1, slow_i_o); |
| slow_mem2 ->init_req(1, slow_mem); |
| slow_reg2 ->init_req(2, control()); |
| slow_i_o2 ->init_req(2, checked_i_o); |
| slow_mem2 ->init_req(2, checked_mem); |
| |
| slow_control = _gvn.transform(slow_reg2); |
| slow_i_o = _gvn.transform(slow_i_o2); |
| slow_mem = _gvn.transform(slow_mem2); |
| |
| if (alloc != NULL) { |
| // We'll restart from the very beginning, after zeroing the whole thing. |
| // This can cause double writes, but that's OK since dest is brand new. |
| // So we ignore the low 31 bits of the value returned from the stub. |
| } else { |
| // We must continue the copy exactly where it failed, or else |
| // another thread might see the wrong number of writes to dest. |
| Node* checked_offset = _gvn.transform( new(C, 3) XorINode(checked_value, intcon(-1)) ); |
| Node* slow_offset = new(C, 3) PhiNode(slow_reg2, TypeInt::INT); |
| slow_offset->init_req(1, intcon(0)); |
| slow_offset->init_req(2, checked_offset); |
| slow_offset = _gvn.transform(slow_offset); |
| |
| // Adjust the arguments by the conditionally incoming offset. |
| Node* src_off_plus = _gvn.transform( new(C, 3) AddINode(src_offset, slow_offset) ); |
| Node* dest_off_plus = _gvn.transform( new(C, 3) AddINode(dest_offset, slow_offset) ); |
| Node* length_minus = _gvn.transform( new(C, 3) SubINode(copy_length, slow_offset) ); |
| |
| // Tweak the node variables to adjust the code produced below: |
| src_offset = src_off_plus; |
| dest_offset = dest_off_plus; |
| copy_length = length_minus; |
| } |
| } |
| |
| set_control(slow_control); |
| if (!stopped()) { |
| // Generate the slow path, if needed. |
| PreserveJVMState pjvms(this); // replace_in_map may trash the map |
| |
| set_memory(slow_mem, adr_type); |
| set_i_o(slow_i_o); |
| |
| if (dest_uninitialized) { |
| generate_clear_array(adr_type, dest, basic_elem_type, |
| intcon(0), NULL, |
| alloc->in(AllocateNode::AllocSize)); |
| } |
| |
| generate_slow_arraycopy(adr_type, |
| src, src_offset, dest, dest_offset, |
| copy_length, /*dest_uninitialized*/false); |
| |
| result_region->init_req(slow_call_path, control()); |
| result_i_o ->init_req(slow_call_path, i_o()); |
| result_memory->init_req(slow_call_path, memory(adr_type)); |
| } |
| |
| // Remove unused edges. |
| for (uint i = 1; i < result_region->req(); i++) { |
| if (result_region->in(i) == NULL) |
| result_region->init_req(i, top()); |
| } |
| |
| // Finished; return the combined state. |
| set_control( _gvn.transform(result_region) ); |
| set_i_o( _gvn.transform(result_i_o) ); |
| set_memory( _gvn.transform(result_memory), adr_type ); |
| |
| // The memory edges above are precise in order to model effects around |
| // array copies accurately to allow value numbering of field loads around |
| // arraycopy. Such field loads, both before and after, are common in Java |
| // collections and similar classes involving header/array data structures. |
| // |
| // But with low number of register or when some registers are used or killed |
| // by arraycopy calls it causes registers spilling on stack. See 6544710. |
| // The next memory barrier is added to avoid it. If the arraycopy can be |
| // optimized away (which it can, sometimes) then we can manually remove |
| // the membar also. |
| // |
| // Do not let reads from the cloned object float above the arraycopy. |
| if (alloc != NULL) { |
| // Do not let stores that initialize this object be reordered with |
| // a subsequent store that would make this object accessible by |
| // other threads. |
| // Record what AllocateNode this StoreStore protects so that |
| // escape analysis can go from the MemBarStoreStoreNode to the |
| // AllocateNode and eliminate the MemBarStoreStoreNode if possible |
| // based on the escape status of the AllocateNode. |
| insert_mem_bar(Op_MemBarStoreStore, alloc->proj_out(AllocateNode::RawAddress)); |
| } else if (InsertMemBarAfterArraycopy) |
| insert_mem_bar(Op_MemBarCPUOrder); |
| } |
| |
| |
| // Helper function which determines if an arraycopy immediately follows |
| // an allocation, with no intervening tests or other escapes for the object. |
| AllocateArrayNode* |
| LibraryCallKit::tightly_coupled_allocation(Node* ptr, |
| RegionNode* slow_region) { |
| if (stopped()) return NULL; // no fast path |
| if (C->AliasLevel() == 0) return NULL; // no MergeMems around |
| |
| AllocateArrayNode* alloc = AllocateArrayNode::Ideal_array_allocation(ptr, &_gvn); |
| if (alloc == NULL) return NULL; |
| |
| Node* rawmem = memory(Compile::AliasIdxRaw); |
| // Is the allocation's memory state untouched? |
| if (!(rawmem->is_Proj() && rawmem->in(0)->is_Initialize())) { |
| // Bail out if there have been raw-memory effects since the allocation. |
| // (Example: There might have been a call or safepoint.) |
| return NULL; |
| } |
| rawmem = rawmem->in(0)->as_Initialize()->memory(Compile::AliasIdxRaw); |
| if (!(rawmem->is_Proj() && rawmem->in(0) == alloc)) { |
| return NULL; |
| } |
| |
| // There must be no unexpected observers of this allocation. |
| for (DUIterator_Fast imax, i = ptr->fast_outs(imax); i < imax; i++) { |
| Node* obs = ptr->fast_out(i); |
| if (obs != this->map()) { |
| return NULL; |
| } |
| } |
| |
| // This arraycopy must unconditionally follow the allocation of the ptr. |
| Node* alloc_ctl = ptr->in(0); |
| assert(just_allocated_object(alloc_ctl) == ptr, "most recent allo"); |
| |
| Node* ctl = control(); |
| while (ctl != alloc_ctl) { |
| // There may be guards which feed into the slow_region. |
| // Any other control flow means that we might not get a chance |
| // to finish initializing the allocated object. |
| if ((ctl->is_IfFalse() || ctl->is_IfTrue()) && ctl->in(0)->is_If()) { |
| IfNode* iff = ctl->in(0)->as_If(); |
| Node* not_ctl = iff->proj_out(1 - ctl->as_Proj()->_con); |
| assert(not_ctl != NULL && not_ctl != ctl, "found alternate"); |
| if (slow_region != NULL && slow_region->find_edge(not_ctl) >= 1) { |
| ctl = iff->in(0); // This test feeds the known slow_region. |
| continue; |
| } |
| // One more try: Various low-level checks bottom out in |
| // uncommon traps. If the debug-info of the trap omits |
| // any reference to the allocation, as we've already |
| // observed, then there can be no objection to the trap. |
| bool found_trap = false; |
| for (DUIterator_Fast jmax, j = not_ctl->fast_outs(jmax); j < jmax; j++) { |
| Node* obs = not_ctl->fast_out(j); |
| if (obs->in(0) == not_ctl && obs->is_Call() && |
| (obs->as_Call()->entry_point() == SharedRuntime::uncommon_trap_blob()->entry_point())) { |
| found_trap = true; break; |
| } |
| } |
| if (found_trap) { |
| ctl = iff->in(0); // This test feeds a harmless uncommon trap. |
| continue; |
| } |
| } |
| return NULL; |
| } |
| |
| // If we get this far, we have an allocation which immediately |
| // precedes the arraycopy, and we can take over zeroing the new object. |
| // The arraycopy will finish the initialization, and provide |
| // a new control state to which we will anchor the destination pointer. |
| |
| return alloc; |
| } |
| |
| // Helper for initialization of arrays, creating a ClearArray. |
| // It writes zero bits in [start..end), within the body of an array object. |
| // The memory effects are all chained onto the 'adr_type' alias category. |
| // |
| // Since the object is otherwise uninitialized, we are free |
| // to put a little "slop" around the edges of the cleared area, |
| // as long as it does not go back into the array's header, |
| // or beyond the array end within the heap. |
| // |
| // The lower edge can be rounded down to the nearest jint and the |
| // upper edge can be rounded up to the nearest MinObjAlignmentInBytes. |
| // |
| // Arguments: |
| // adr_type memory slice where writes are generated |
| // dest oop of the destination array |
| // basic_elem_type element type of the destination |
| // slice_idx array index of first element to store |
| // slice_len number of elements to store (or NULL) |
| // dest_size total size in bytes of the array object |
| // |
| // Exactly one of slice_len or dest_size must be non-NULL. |
| // If dest_size is non-NULL, zeroing extends to the end of the object. |
| // If slice_len is non-NULL, the slice_idx value must be a constant. |
| void |
| LibraryCallKit::generate_clear_array(const TypePtr* adr_type, |
| Node* dest, |
| BasicType basic_elem_type, |
| Node* slice_idx, |
| Node* slice_len, |
| Node* dest_size) { |
| // one or the other but not both of slice_len and dest_size: |
| assert((slice_len != NULL? 1: 0) + (dest_size != NULL? 1: 0) == 1, ""); |
| if (slice_len == NULL) slice_len = top(); |
| if (dest_size == NULL) dest_size = top(); |
| |
| // operate on this memory slice: |
| Node* mem = memory(adr_type); // memory slice to operate on |
| |
| // scaling and rounding of indexes: |
| int scale = exact_log2(type2aelembytes(basic_elem_type)); |
| int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type); |
| int clear_low = (-1 << scale) & (BytesPerInt - 1); |
| int bump_bit = (-1 << scale) & BytesPerInt; |
| |
| // determine constant starts and ends |
| const intptr_t BIG_NEG = -128; |
| assert(BIG_NEG + 2*abase < 0, "neg enough"); |
| intptr_t slice_idx_con = (intptr_t) find_int_con(slice_idx, BIG_NEG); |
| intptr_t slice_len_con = (intptr_t) find_int_con(slice_len, BIG_NEG); |
| if (slice_len_con == 0) { |
| return; // nothing to do here |
| } |
| intptr_t start_con = (abase + (slice_idx_con << scale)) & ~clear_low; |
| intptr_t end_con = find_intptr_t_con(dest_size, -1); |
| if (slice_idx_con >= 0 && slice_len_con >= 0) { |
| assert(end_con < 0, "not two cons"); |
| end_con = round_to(abase + ((slice_idx_con + slice_len_con) << scale), |
| BytesPerLong); |
| } |
| |
| if (start_con >= 0 && end_con >= 0) { |
| // Constant start and end. Simple. |
| mem = ClearArrayNode::clear_memory(control(), mem, dest, |
| start_con, end_con, &_gvn); |
| } else if (start_con >= 0 && dest_size != top()) { |
| // Constant start, pre-rounded end after the tail of the array. |
| Node* end = dest_size; |
| mem = ClearArrayNode::clear_memory(control(), mem, dest, |
| start_con, end, &_gvn); |
| } else if (start_con >= 0 && slice_len != top()) { |
| // Constant start, non-constant end. End needs rounding up. |
| // End offset = round_up(abase + ((slice_idx_con + slice_len) << scale), 8) |
| intptr_t end_base = abase + (slice_idx_con << scale); |
| int end_round = (-1 << scale) & (BytesPerLong - 1); |
| Node* end = ConvI2X(slice_len); |
| if (scale != 0) |
| end = _gvn.transform( new(C,3) LShiftXNode(end, intcon(scale) )); |
| end_base += end_round; |
| end = _gvn.transform( new(C,3) AddXNode(end, MakeConX(end_base)) ); |
| end = _gvn.transform( new(C,3) AndXNode(end, MakeConX(~end_round)) ); |
| mem = ClearArrayNode::clear_memory(control(), mem, dest, |
| start_con, end, &_gvn); |
| } else if (start_con < 0 && dest_size != top()) { |
| // Non-constant start, pre-rounded end after the tail of the array. |
| // This is almost certainly a "round-to-end" operation. |
| Node* start = slice_idx; |
| start = ConvI2X(start); |
| if (scale != 0) |
| start = _gvn.transform( new(C,3) LShiftXNode( start, intcon(scale) )); |
| start = _gvn.transform( new(C,3) AddXNode(start, MakeConX(abase)) ); |
| if ((bump_bit | clear_low) != 0) { |
| int to_clear = (bump_bit | clear_low); |
| // Align up mod 8, then store a jint zero unconditionally |
| // just before the mod-8 boundary. |
| if (((abase + bump_bit) & ~to_clear) - bump_bit |
| < arrayOopDesc::length_offset_in_bytes() + BytesPerInt) { |
| bump_bit = 0; |
| assert((abase & to_clear) == 0, "array base must be long-aligned"); |
| } else { |
| // Bump 'start' up to (or past) the next jint boundary: |
| start = _gvn.transform( new(C,3) AddXNode(start, MakeConX(bump_bit)) ); |
| assert((abase & clear_low) == 0, "array base must be int-aligned"); |
| } |
| // Round bumped 'start' down to jlong boundary in body of array. |
| start = _gvn.transform( new(C,3) AndXNode(start, MakeConX(~to_clear)) ); |
| if (bump_bit != 0) { |
| // Store a zero to the immediately preceding jint: |
| Node* x1 = _gvn.transform( new(C,3) AddXNode(start, MakeConX(-bump_bit)) ); |
| Node* p1 = basic_plus_adr(dest, x1); |
| mem = StoreNode::make(_gvn, control(), mem, p1, adr_type, intcon(0), T_INT); |
| mem = _gvn.transform(mem); |
| } |
| } |
| Node* end = dest_size; // pre-rounded |
| mem = ClearArrayNode::clear_memory(control(), mem, dest, |
| start, end, &_gvn); |
| } else { |
| // Non-constant start, unrounded non-constant end. |
| // (Nobody zeroes a random midsection of an array using this routine.) |
| ShouldNotReachHere(); // fix caller |
| } |
| |
| // Done. |
| set_memory(mem, adr_type); |
| } |
| |
| |
| bool |
| LibraryCallKit::generate_block_arraycopy(const TypePtr* adr_type, |
| BasicType basic_elem_type, |
| AllocateNode* alloc, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* dest_size, bool dest_uninitialized) { |
| // See if there is an advantage from block transfer. |
| int scale = exact_log2(type2aelembytes(basic_elem_type)); |
| if (scale >= LogBytesPerLong) |
| return false; // it is already a block transfer |
| |
| // Look at the alignment of the starting offsets. |
| int abase = arrayOopDesc::base_offset_in_bytes(basic_elem_type); |
| |
| intptr_t src_off_con = (intptr_t) find_int_con(src_offset, -1); |
| intptr_t dest_off_con = (intptr_t) find_int_con(dest_offset, -1); |
| if (src_off_con < 0 || dest_off_con < 0) |
| // At present, we can only understand constants. |
| return false; |
| |
| intptr_t src_off = abase + (src_off_con << scale); |
| intptr_t dest_off = abase + (dest_off_con << scale); |
| |
| if (((src_off | dest_off) & (BytesPerLong-1)) != 0) { |
| // Non-aligned; too bad. |
| // One more chance: Pick off an initial 32-bit word. |
| // This is a common case, since abase can be odd mod 8. |
| if (((src_off | dest_off) & (BytesPerLong-1)) == BytesPerInt && |
| ((src_off ^ dest_off) & (BytesPerLong-1)) == 0) { |
| Node* sptr = basic_plus_adr(src, src_off); |
| Node* dptr = basic_plus_adr(dest, dest_off); |
| Node* sval = make_load(control(), sptr, TypeInt::INT, T_INT, adr_type); |
| store_to_memory(control(), dptr, sval, T_INT, adr_type); |
| src_off += BytesPerInt; |
| dest_off += BytesPerInt; |
| } else { |
| return false; |
| } |
| } |
| assert(src_off % BytesPerLong == 0, ""); |
| assert(dest_off % BytesPerLong == 0, ""); |
| |
| // Do this copy by giant steps. |
| Node* sptr = basic_plus_adr(src, src_off); |
| Node* dptr = basic_plus_adr(dest, dest_off); |
| Node* countx = dest_size; |
| countx = _gvn.transform( new (C, 3) SubXNode(countx, MakeConX(dest_off)) ); |
| countx = _gvn.transform( new (C, 3) URShiftXNode(countx, intcon(LogBytesPerLong)) ); |
| |
| bool disjoint_bases = true; // since alloc != NULL |
| generate_unchecked_arraycopy(adr_type, T_LONG, disjoint_bases, |
| sptr, NULL, dptr, NULL, countx, dest_uninitialized); |
| |
| return true; |
| } |
| |
| |
| // Helper function; generates code for the slow case. |
| // We make a call to a runtime method which emulates the native method, |
| // but without the native wrapper overhead. |
| void |
| LibraryCallKit::generate_slow_arraycopy(const TypePtr* adr_type, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, bool dest_uninitialized) { |
| assert(!dest_uninitialized, "Invariant"); |
| Node* call = make_runtime_call(RC_NO_LEAF | RC_UNCOMMON, |
| OptoRuntime::slow_arraycopy_Type(), |
| OptoRuntime::slow_arraycopy_Java(), |
| "slow_arraycopy", adr_type, |
| src, src_offset, dest, dest_offset, |
| copy_length); |
| |
| // Handle exceptions thrown by this fellow: |
| make_slow_call_ex(call, env()->Throwable_klass(), false); |
| } |
| |
| // Helper function; generates code for cases requiring runtime checks. |
| Node* |
| LibraryCallKit::generate_checkcast_arraycopy(const TypePtr* adr_type, |
| Node* dest_elem_klass, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, bool dest_uninitialized) { |
| if (stopped()) return NULL; |
| |
| address copyfunc_addr = StubRoutines::checkcast_arraycopy(dest_uninitialized); |
| if (copyfunc_addr == NULL) { // Stub was not generated, go slow path. |
| return NULL; |
| } |
| |
| // Pick out the parameters required to perform a store-check |
| // for the target array. This is an optimistic check. It will |
| // look in each non-null element's class, at the desired klass's |
| // super_check_offset, for the desired klass. |
| int sco_offset = in_bytes(Klass::super_check_offset_offset()); |
| Node* p3 = basic_plus_adr(dest_elem_klass, sco_offset); |
| Node* n3 = new(C, 3) LoadINode(NULL, memory(p3), p3, _gvn.type(p3)->is_ptr()); |
| Node* check_offset = ConvI2X(_gvn.transform(n3)); |
| Node* check_value = dest_elem_klass; |
| |
| Node* src_start = array_element_address(src, src_offset, T_OBJECT); |
| Node* dest_start = array_element_address(dest, dest_offset, T_OBJECT); |
| |
| // (We know the arrays are never conjoint, because their types differ.) |
| Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, |
| OptoRuntime::checkcast_arraycopy_Type(), |
| copyfunc_addr, "checkcast_arraycopy", adr_type, |
| // five arguments, of which two are |
| // intptr_t (jlong in LP64) |
| src_start, dest_start, |
| copy_length XTOP, |
| check_offset XTOP, |
| check_value); |
| |
| return _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Parms)); |
| } |
| |
| |
| // Helper function; generates code for cases requiring runtime checks. |
| Node* |
| LibraryCallKit::generate_generic_arraycopy(const TypePtr* adr_type, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, bool dest_uninitialized) { |
| assert(!dest_uninitialized, "Invariant"); |
| if (stopped()) return NULL; |
| address copyfunc_addr = StubRoutines::generic_arraycopy(); |
| if (copyfunc_addr == NULL) { // Stub was not generated, go slow path. |
| return NULL; |
| } |
| |
| Node* call = make_runtime_call(RC_LEAF|RC_NO_FP, |
| OptoRuntime::generic_arraycopy_Type(), |
| copyfunc_addr, "generic_arraycopy", adr_type, |
| src, src_offset, dest, dest_offset, copy_length); |
| |
| return _gvn.transform(new (C, 1) ProjNode(call, TypeFunc::Parms)); |
| } |
| |
| // Helper function; generates the fast out-of-line call to an arraycopy stub. |
| void |
| LibraryCallKit::generate_unchecked_arraycopy(const TypePtr* adr_type, |
| BasicType basic_elem_type, |
| bool disjoint_bases, |
| Node* src, Node* src_offset, |
| Node* dest, Node* dest_offset, |
| Node* copy_length, bool dest_uninitialized) { |
| if (stopped()) return; // nothing to do |
| |
| Node* src_start = src; |
| Node* dest_start = dest; |
| if (src_offset != NULL || dest_offset != NULL) { |
| assert(src_offset != NULL && dest_offset != NULL, ""); |
| src_start = array_element_address(src, src_offset, basic_elem_type); |
| dest_start = array_element_address(dest, dest_offset, basic_elem_type); |
| } |
| |
| // Figure out which arraycopy runtime method to call. |
| const char* copyfunc_name = "arraycopy"; |
| address copyfunc_addr = |
| basictype2arraycopy(basic_elem_type, src_offset, dest_offset, |
| disjoint_bases, copyfunc_name, dest_uninitialized); |
| |
| // Call it. Note that the count_ix value is not scaled to a byte-size. |
| make_runtime_call(RC_LEAF|RC_NO_FP, |
| OptoRuntime::fast_arraycopy_Type(), |
| copyfunc_addr, copyfunc_name, adr_type, |
| src_start, dest_start, copy_length XTOP); |
| } |
| |
| //----------------------------inline_reference_get---------------------------- |
| |
| bool LibraryCallKit::inline_reference_get() { |
| const int nargs = 1; // self |
| |
| guarantee(java_lang_ref_Reference::referent_offset > 0, |
| "should have already been set"); |
| |
| int referent_offset = java_lang_ref_Reference::referent_offset; |
| |
| // Restore the stack and pop off the argument |
| _sp += nargs; |
| Node *reference_obj = pop(); |
| |
| // Null check on self without removing any arguments. |
| _sp += nargs; |
| reference_obj = do_null_check(reference_obj, T_OBJECT); |
| _sp -= nargs;; |
| |
| if (stopped()) return true; |
| |
| Node *adr = basic_plus_adr(reference_obj, reference_obj, referent_offset); |
| |
| ciInstanceKlass* klass = env()->Object_klass(); |
| const TypeOopPtr* object_type = TypeOopPtr::make_from_klass(klass); |
| |
| Node* no_ctrl = NULL; |
| Node *result = make_load(no_ctrl, adr, object_type, T_OBJECT); |
| |
| // Use the pre-barrier to record the value in the referent field |
| pre_barrier(false /* do_load */, |
| control(), |
| NULL /* obj */, NULL /* adr */, max_juint /* alias_idx */, NULL /* val */, NULL /* val_type */, |
| result /* pre_val */, |
| T_OBJECT); |
| |
| push(result); |
| return true; |
| } |