| /* |
| * Copyright (c) 1999, 2010, Oracle and/or its affiliates. All rights reserved. |
| * Copyright 2008, 2009, 2010 Red Hat, Inc. |
| * 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. |
| * |
| */ |
| |
| #ifndef SHARE_VM_SHARK_SHARKTOPLEVELBLOCK_HPP |
| #define SHARE_VM_SHARK_SHARKTOPLEVELBLOCK_HPP |
| |
| #include "ci/ciStreams.hpp" |
| #include "ci/ciType.hpp" |
| #include "ci/ciTypeFlow.hpp" |
| #include "interpreter/bytecodes.hpp" |
| #include "memory/allocation.hpp" |
| #include "shark/llvmHeaders.hpp" |
| #include "shark/sharkBlock.hpp" |
| #include "shark/sharkBuilder.hpp" |
| #include "shark/sharkFunction.hpp" |
| #include "shark/sharkState.hpp" |
| #include "shark/sharkValue.hpp" |
| |
| class SharkTopLevelBlock : public SharkBlock { |
| public: |
| SharkTopLevelBlock(SharkFunction* function, ciTypeFlow::Block* ciblock) |
| : SharkBlock(function), |
| _function(function), |
| _ciblock(ciblock), |
| _entered(false), |
| _has_trap(false), |
| _needs_phis(false), |
| _entry_state(NULL), |
| _entry_block(NULL) {} |
| |
| private: |
| SharkFunction* _function; |
| ciTypeFlow::Block* _ciblock; |
| |
| public: |
| SharkFunction* function() const { |
| return _function; |
| } |
| ciTypeFlow::Block* ciblock() const { |
| return _ciblock; |
| } |
| |
| // Function properties |
| public: |
| SharkStack* stack() const { |
| return function()->stack(); |
| } |
| |
| // Typeflow properties |
| public: |
| int index() const { |
| return ciblock()->pre_order(); |
| } |
| bool is_backedge_copy() const { |
| return ciblock()->is_backedge_copy(); |
| } |
| int stack_depth_at_entry() const { |
| return ciblock()->stack_size(); |
| } |
| ciType* local_type_at_entry(int index) const { |
| return ciblock()->local_type_at(index); |
| } |
| ciType* stack_type_at_entry(int slot) const { |
| return ciblock()->stack_type_at(slot); |
| } |
| int start() const { |
| return ciblock()->start(); |
| } |
| int limit() const { |
| return ciblock()->limit(); |
| } |
| bool falls_through() const { |
| return ciblock()->control() == ciBlock::fall_through_bci; |
| } |
| int num_successors() const { |
| return ciblock()->successors()->length(); |
| } |
| SharkTopLevelBlock* successor(int index) const { |
| return function()->block(ciblock()->successors()->at(index)->pre_order()); |
| } |
| SharkTopLevelBlock* bci_successor(int bci) const; |
| |
| // Exceptions |
| private: |
| GrowableArray<ciExceptionHandler*>* _exc_handlers; |
| GrowableArray<SharkTopLevelBlock*>* _exceptions; |
| |
| private: |
| void compute_exceptions(); |
| |
| private: |
| int num_exceptions() const { |
| return _exc_handlers->length(); |
| } |
| ciExceptionHandler* exc_handler(int index) const { |
| return _exc_handlers->at(index); |
| } |
| SharkTopLevelBlock* exception(int index) const { |
| return _exceptions->at(index); |
| } |
| |
| // Traps |
| private: |
| bool _has_trap; |
| int _trap_request; |
| int _trap_bci; |
| |
| void set_trap(int trap_request, int trap_bci) { |
| assert(!has_trap(), "shouldn't have"); |
| _has_trap = true; |
| _trap_request = trap_request; |
| _trap_bci = trap_bci; |
| } |
| |
| private: |
| bool has_trap() { |
| return _has_trap; |
| } |
| int trap_request() { |
| assert(has_trap(), "should have"); |
| return _trap_request; |
| } |
| int trap_bci() { |
| assert(has_trap(), "should have"); |
| return _trap_bci; |
| } |
| |
| private: |
| void scan_for_traps(); |
| |
| private: |
| bool static_field_ok_in_clinit(ciField* field); |
| |
| // Entry state |
| private: |
| bool _entered; |
| bool _needs_phis; |
| |
| public: |
| bool entered() const { |
| return _entered; |
| } |
| bool needs_phis() const { |
| return _needs_phis; |
| } |
| |
| private: |
| void enter(SharkTopLevelBlock* predecessor, bool is_exception); |
| |
| public: |
| void enter() { |
| enter(NULL, false); |
| } |
| |
| private: |
| SharkState* _entry_state; |
| |
| private: |
| SharkState* entry_state(); |
| |
| private: |
| llvm::BasicBlock* _entry_block; |
| |
| public: |
| llvm::BasicBlock* entry_block() const { |
| return _entry_block; |
| } |
| |
| public: |
| void initialize(); |
| |
| public: |
| void add_incoming(SharkState* incoming_state); |
| |
| // Method |
| public: |
| llvm::Value* method() { |
| return current_state()->method(); |
| } |
| |
| // Temporary oop storage |
| public: |
| void set_oop_tmp(llvm::Value* value) { |
| assert(value, "value must be non-NULL (will be reset by get_oop_tmp)"); |
| assert(!current_state()->oop_tmp(), "oop_tmp gets and sets must match"); |
| current_state()->set_oop_tmp(value); |
| } |
| llvm::Value* get_oop_tmp() { |
| llvm::Value* value = current_state()->oop_tmp(); |
| assert(value, "oop_tmp gets and sets must match"); |
| current_state()->set_oop_tmp(NULL); |
| return value; |
| } |
| |
| // Cache and decache |
| private: |
| void decache_for_Java_call(ciMethod* callee); |
| void cache_after_Java_call(ciMethod* callee); |
| void decache_for_VM_call(); |
| void cache_after_VM_call(); |
| void decache_for_trap(); |
| |
| // Monitors |
| private: |
| int num_monitors() { |
| return current_state()->num_monitors(); |
| } |
| int set_num_monitors(int num_monitors) { |
| current_state()->set_num_monitors(num_monitors); |
| } |
| |
| // Code generation |
| public: |
| void emit_IR(); |
| |
| // Branch helpers |
| private: |
| void do_branch(int successor_index); |
| |
| // Zero checks |
| private: |
| void do_zero_check(SharkValue* value); |
| void zero_check_value(SharkValue* value, llvm::BasicBlock* continue_block); |
| |
| public: |
| void do_deferred_zero_check(SharkValue* value, |
| int bci, |
| SharkState* saved_state, |
| llvm::BasicBlock* continue_block); |
| // Exceptions |
| private: |
| llvm::Value* pending_exception_address() const { |
| return builder()->CreateAddressOfStructEntry( |
| thread(), Thread::pending_exception_offset(), |
| llvm::PointerType::getUnqual(SharkType::oop_type()), |
| "pending_exception_addr"); |
| } |
| llvm::LoadInst* get_pending_exception() const { |
| return builder()->CreateLoad( |
| pending_exception_address(), "pending_exception"); |
| } |
| void clear_pending_exception() const { |
| builder()->CreateStore(LLVMValue::null(), pending_exception_address()); |
| } |
| public: |
| enum ExceptionActionMask { |
| // The actual bitmasks that things test against |
| EAM_CHECK = 1, // whether to check for pending exceptions |
| EAM_HANDLE = 2, // whether to attempt to handle pending exceptions |
| EAM_MONITOR_FUDGE = 4, // whether the monitor count needs adjusting |
| |
| // More convenient values for passing |
| EX_CHECK_NONE = 0, |
| EX_CHECK_NO_CATCH = EAM_CHECK, |
| EX_CHECK_FULL = EAM_CHECK | EAM_HANDLE |
| }; |
| void check_pending_exception(int action); |
| void handle_exception(llvm::Value* exception, int action); |
| void marshal_exception_fast(int num_options); |
| void marshal_exception_slow(int num_options); |
| llvm::BasicBlock* handler_for_exception(int index); |
| |
| // VM calls |
| private: |
| llvm::CallInst* call_vm(llvm::Value* callee, |
| llvm::Value** args_start, |
| llvm::Value** args_end, |
| int exception_action) { |
| decache_for_VM_call(); |
| stack()->CreateSetLastJavaFrame(); |
| llvm::CallInst *res = builder()->CreateCall(callee, llvm::makeArrayRef(args_start, args_end)); |
| stack()->CreateResetLastJavaFrame(); |
| cache_after_VM_call(); |
| if (exception_action & EAM_CHECK) { |
| check_pending_exception(exception_action); |
| current_state()->set_has_safepointed(true); |
| } |
| return res; |
| } |
| |
| public: |
| llvm::CallInst* call_vm(llvm::Value* callee, |
| int exception_action) { |
| llvm::Value *args[] = {thread()}; |
| return call_vm(callee, args, args + 1, exception_action); |
| } |
| llvm::CallInst* call_vm(llvm::Value* callee, |
| llvm::Value* arg1, |
| int exception_action) { |
| llvm::Value *args[] = {thread(), arg1}; |
| return call_vm(callee, args, args + 2, exception_action); |
| } |
| llvm::CallInst* call_vm(llvm::Value* callee, |
| llvm::Value* arg1, |
| llvm::Value* arg2, |
| int exception_action) { |
| llvm::Value *args[] = {thread(), arg1, arg2}; |
| return call_vm(callee, args, args + 3, exception_action); |
| } |
| llvm::CallInst* call_vm(llvm::Value* callee, |
| llvm::Value* arg1, |
| llvm::Value* arg2, |
| llvm::Value* arg3, |
| int exception_action) { |
| llvm::Value *args[] = {thread(), arg1, arg2, arg3}; |
| return call_vm(callee, args, args + 4, exception_action); |
| } |
| |
| // VM call oop return handling |
| private: |
| llvm::LoadInst* get_vm_result() const { |
| llvm::Value *addr = builder()->CreateAddressOfStructEntry( |
| thread(), JavaThread::vm_result_offset(), |
| llvm::PointerType::getUnqual(SharkType::oop_type()), |
| "vm_result_addr"); |
| llvm::LoadInst *result = builder()->CreateLoad(addr, "vm_result"); |
| builder()->CreateStore(LLVMValue::null(), addr); |
| return result; |
| } |
| |
| // Synchronization |
| private: |
| void acquire_lock(llvm::Value* lockee, int exception_action); |
| void release_lock(int exception_action); |
| |
| public: |
| void acquire_method_lock(); |
| |
| // Bounds checks |
| private: |
| void check_bounds(SharkValue* array, SharkValue* index); |
| |
| // Safepoints |
| private: |
| void maybe_add_safepoint(); |
| void maybe_add_backedge_safepoint(); |
| |
| // Loop safepoint removal |
| private: |
| bool _can_reach_visited; |
| |
| bool can_reach(SharkTopLevelBlock* other); |
| bool can_reach_helper(SharkTopLevelBlock* other); |
| |
| // Traps |
| private: |
| llvm::BasicBlock* make_trap(int trap_bci, int trap_request); |
| void do_trap(int trap_request); |
| |
| // Returns |
| private: |
| void call_register_finalizer(llvm::Value* receiver); |
| void handle_return(BasicType type, llvm::Value* exception); |
| |
| // arraylength |
| private: |
| void do_arraylength(); |
| |
| // *aload and *astore |
| private: |
| void do_aload(BasicType basic_type); |
| void do_astore(BasicType basic_type); |
| |
| // *return and athrow |
| private: |
| void do_return(BasicType type); |
| void do_athrow(); |
| |
| // goto* |
| private: |
| void do_goto(); |
| |
| // jsr* and ret |
| private: |
| void do_jsr(); |
| void do_ret(); |
| |
| // if* |
| private: |
| void do_if_helper(llvm::ICmpInst::Predicate p, |
| llvm::Value* b, |
| llvm::Value* a, |
| SharkState* if_taken_state, |
| SharkState* not_taken_state); |
| void do_if(llvm::ICmpInst::Predicate p, SharkValue* b, SharkValue* a); |
| |
| // tableswitch and lookupswitch |
| private: |
| void do_switch(); |
| |
| // invoke* |
| private: |
| ciMethod* improve_virtual_call(ciMethod* caller, |
| ciInstanceKlass* klass, |
| ciMethod* dest_method, |
| ciType* receiver_type); |
| llvm::Value* get_direct_callee(ciMethod* method); |
| llvm::Value* get_virtual_callee(SharkValue* receiver, int vtable_index); |
| llvm::Value* get_interface_callee(SharkValue* receiver, ciMethod* method); |
| |
| void do_call(); |
| |
| // checkcast and instanceof |
| private: |
| bool static_subtype_check(ciKlass* check_klass, ciKlass* object_klass); |
| void do_full_instance_check(ciKlass* klass); |
| void do_trapping_instance_check(ciKlass* klass); |
| |
| void do_instance_check(); |
| bool maybe_do_instanceof_if(); |
| |
| // new and *newarray |
| private: |
| void do_new(); |
| void do_newarray(); |
| void do_anewarray(); |
| void do_multianewarray(); |
| |
| // monitorenter and monitorexit |
| private: |
| void do_monitorenter(); |
| void do_monitorexit(); |
| }; |
| |
| #endif // SHARE_VM_SHARK_SHARKTOPLEVELBLOCK_HPP |