| /* |
| * Copyright (c) 2005, 2015, 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 "c1/c1_Compilation.hpp" |
| #include "c1/c1_Defs.hpp" |
| #include "c1/c1_FrameMap.hpp" |
| #include "c1/c1_Instruction.hpp" |
| #include "c1/c1_LIRAssembler.hpp" |
| #include "c1/c1_LIRGenerator.hpp" |
| #include "c1/c1_ValueStack.hpp" |
| #include "ci/ciArrayKlass.hpp" |
| #include "ci/ciInstance.hpp" |
| #include "ci/ciObjArray.hpp" |
| #include "gc/shared/cardTableModRefBS.hpp" |
| #include "runtime/arguments.hpp" |
| #include "runtime/sharedRuntime.hpp" |
| #include "runtime/stubRoutines.hpp" |
| #include "runtime/vm_version.hpp" |
| #include "utilities/bitMap.inline.hpp" |
| #include "utilities/macros.hpp" |
| #if INCLUDE_ALL_GCS |
| #include "gc/g1/heapRegion.hpp" |
| #endif // INCLUDE_ALL_GCS |
| |
| #ifdef ASSERT |
| #define __ gen()->lir(__FILE__, __LINE__)-> |
| #else |
| #define __ gen()->lir()-> |
| #endif |
| |
| #ifndef PATCHED_ADDR |
| #define PATCHED_ADDR (max_jint) |
| #endif |
| |
| void PhiResolverState::reset(int max_vregs) { |
| // Initialize array sizes |
| _virtual_operands.at_put_grow(max_vregs - 1, NULL, NULL); |
| _virtual_operands.trunc_to(0); |
| _other_operands.at_put_grow(max_vregs - 1, NULL, NULL); |
| _other_operands.trunc_to(0); |
| _vreg_table.at_put_grow(max_vregs - 1, NULL, NULL); |
| _vreg_table.trunc_to(0); |
| } |
| |
| |
| |
| //-------------------------------------------------------------- |
| // PhiResolver |
| |
| // Resolves cycles: |
| // |
| // r1 := r2 becomes temp := r1 |
| // r2 := r1 r1 := r2 |
| // r2 := temp |
| // and orders moves: |
| // |
| // r2 := r3 becomes r1 := r2 |
| // r1 := r2 r2 := r3 |
| |
| PhiResolver::PhiResolver(LIRGenerator* gen, int max_vregs) |
| : _gen(gen) |
| , _state(gen->resolver_state()) |
| , _temp(LIR_OprFact::illegalOpr) |
| { |
| // reinitialize the shared state arrays |
| _state.reset(max_vregs); |
| } |
| |
| |
| void PhiResolver::emit_move(LIR_Opr src, LIR_Opr dest) { |
| assert(src->is_valid(), ""); |
| assert(dest->is_valid(), ""); |
| __ move(src, dest); |
| } |
| |
| |
| void PhiResolver::move_temp_to(LIR_Opr dest) { |
| assert(_temp->is_valid(), ""); |
| emit_move(_temp, dest); |
| NOT_PRODUCT(_temp = LIR_OprFact::illegalOpr); |
| } |
| |
| |
| void PhiResolver::move_to_temp(LIR_Opr src) { |
| assert(_temp->is_illegal(), ""); |
| _temp = _gen->new_register(src->type()); |
| emit_move(src, _temp); |
| } |
| |
| |
| // Traverse assignment graph in depth first order and generate moves in post order |
| // ie. two assignments: b := c, a := b start with node c: |
| // Call graph: move(NULL, c) -> move(c, b) -> move(b, a) |
| // Generates moves in this order: move b to a and move c to b |
| // ie. cycle a := b, b := a start with node a |
| // Call graph: move(NULL, a) -> move(a, b) -> move(b, a) |
| // Generates moves in this order: move b to temp, move a to b, move temp to a |
| void PhiResolver::move(ResolveNode* src, ResolveNode* dest) { |
| if (!dest->visited()) { |
| dest->set_visited(); |
| for (int i = dest->no_of_destinations()-1; i >= 0; i --) { |
| move(dest, dest->destination_at(i)); |
| } |
| } else if (!dest->start_node()) { |
| // cylce in graph detected |
| assert(_loop == NULL, "only one loop valid!"); |
| _loop = dest; |
| move_to_temp(src->operand()); |
| return; |
| } // else dest is a start node |
| |
| if (!dest->assigned()) { |
| if (_loop == dest) { |
| move_temp_to(dest->operand()); |
| dest->set_assigned(); |
| } else if (src != NULL) { |
| emit_move(src->operand(), dest->operand()); |
| dest->set_assigned(); |
| } |
| } |
| } |
| |
| |
| PhiResolver::~PhiResolver() { |
| int i; |
| // resolve any cycles in moves from and to virtual registers |
| for (i = virtual_operands().length() - 1; i >= 0; i --) { |
| ResolveNode* node = virtual_operands()[i]; |
| if (!node->visited()) { |
| _loop = NULL; |
| move(NULL, node); |
| node->set_start_node(); |
| assert(_temp->is_illegal(), "move_temp_to() call missing"); |
| } |
| } |
| |
| // generate move for move from non virtual register to abitrary destination |
| for (i = other_operands().length() - 1; i >= 0; i --) { |
| ResolveNode* node = other_operands()[i]; |
| for (int j = node->no_of_destinations() - 1; j >= 0; j --) { |
| emit_move(node->operand(), node->destination_at(j)->operand()); |
| } |
| } |
| } |
| |
| |
| ResolveNode* PhiResolver::create_node(LIR_Opr opr, bool source) { |
| ResolveNode* node; |
| if (opr->is_virtual()) { |
| int vreg_num = opr->vreg_number(); |
| node = vreg_table().at_grow(vreg_num, NULL); |
| assert(node == NULL || node->operand() == opr, ""); |
| if (node == NULL) { |
| node = new ResolveNode(opr); |
| vreg_table()[vreg_num] = node; |
| } |
| // Make sure that all virtual operands show up in the list when |
| // they are used as the source of a move. |
| if (source && !virtual_operands().contains(node)) { |
| virtual_operands().append(node); |
| } |
| } else { |
| assert(source, ""); |
| node = new ResolveNode(opr); |
| other_operands().append(node); |
| } |
| return node; |
| } |
| |
| |
| void PhiResolver::move(LIR_Opr src, LIR_Opr dest) { |
| assert(dest->is_virtual(), ""); |
| // tty->print("move "); src->print(); tty->print(" to "); dest->print(); tty->cr(); |
| assert(src->is_valid(), ""); |
| assert(dest->is_valid(), ""); |
| ResolveNode* source = source_node(src); |
| source->append(destination_node(dest)); |
| } |
| |
| |
| //-------------------------------------------------------------- |
| // LIRItem |
| |
| void LIRItem::set_result(LIR_Opr opr) { |
| assert(value()->operand()->is_illegal() || value()->operand()->is_constant(), "operand should never change"); |
| value()->set_operand(opr); |
| |
| if (opr->is_virtual()) { |
| _gen->_instruction_for_operand.at_put_grow(opr->vreg_number(), value(), NULL); |
| } |
| |
| _result = opr; |
| } |
| |
| void LIRItem::load_item() { |
| if (result()->is_illegal()) { |
| // update the items result |
| _result = value()->operand(); |
| } |
| if (!result()->is_register()) { |
| LIR_Opr reg = _gen->new_register(value()->type()); |
| __ move(result(), reg); |
| if (result()->is_constant()) { |
| _result = reg; |
| } else { |
| set_result(reg); |
| } |
| } |
| } |
| |
| |
| void LIRItem::load_for_store(BasicType type) { |
| if (_gen->can_store_as_constant(value(), type)) { |
| _result = value()->operand(); |
| if (!_result->is_constant()) { |
| _result = LIR_OprFact::value_type(value()->type()); |
| } |
| } else if (type == T_BYTE || type == T_BOOLEAN) { |
| load_byte_item(); |
| } else { |
| load_item(); |
| } |
| } |
| |
| void LIRItem::load_item_force(LIR_Opr reg) { |
| LIR_Opr r = result(); |
| if (r != reg) { |
| #if !defined(ARM) && !defined(E500V2) |
| if (r->type() != reg->type()) { |
| // moves between different types need an intervening spill slot |
| r = _gen->force_to_spill(r, reg->type()); |
| } |
| #endif |
| __ move(r, reg); |
| _result = reg; |
| } |
| } |
| |
| ciObject* LIRItem::get_jobject_constant() const { |
| ObjectType* oc = type()->as_ObjectType(); |
| if (oc) { |
| return oc->constant_value(); |
| } |
| return NULL; |
| } |
| |
| |
| jint LIRItem::get_jint_constant() const { |
| assert(is_constant() && value() != NULL, ""); |
| assert(type()->as_IntConstant() != NULL, "type check"); |
| return type()->as_IntConstant()->value(); |
| } |
| |
| |
| jint LIRItem::get_address_constant() const { |
| assert(is_constant() && value() != NULL, ""); |
| assert(type()->as_AddressConstant() != NULL, "type check"); |
| return type()->as_AddressConstant()->value(); |
| } |
| |
| |
| jfloat LIRItem::get_jfloat_constant() const { |
| assert(is_constant() && value() != NULL, ""); |
| assert(type()->as_FloatConstant() != NULL, "type check"); |
| return type()->as_FloatConstant()->value(); |
| } |
| |
| |
| jdouble LIRItem::get_jdouble_constant() const { |
| assert(is_constant() && value() != NULL, ""); |
| assert(type()->as_DoubleConstant() != NULL, "type check"); |
| return type()->as_DoubleConstant()->value(); |
| } |
| |
| |
| jlong LIRItem::get_jlong_constant() const { |
| assert(is_constant() && value() != NULL, ""); |
| assert(type()->as_LongConstant() != NULL, "type check"); |
| return type()->as_LongConstant()->value(); |
| } |
| |
| |
| |
| //-------------------------------------------------------------- |
| |
| |
| void LIRGenerator::init() { |
| _bs = Universe::heap()->barrier_set(); |
| } |
| |
| |
| void LIRGenerator::block_do_prolog(BlockBegin* block) { |
| #ifndef PRODUCT |
| if (PrintIRWithLIR) { |
| block->print(); |
| } |
| #endif |
| |
| // set up the list of LIR instructions |
| assert(block->lir() == NULL, "LIR list already computed for this block"); |
| _lir = new LIR_List(compilation(), block); |
| block->set_lir(_lir); |
| |
| __ branch_destination(block->label()); |
| |
| if (LIRTraceExecution && |
| Compilation::current()->hir()->start()->block_id() != block->block_id() && |
| !block->is_set(BlockBegin::exception_entry_flag)) { |
| assert(block->lir()->instructions_list()->length() == 1, "should come right after br_dst"); |
| trace_block_entry(block); |
| } |
| } |
| |
| |
| void LIRGenerator::block_do_epilog(BlockBegin* block) { |
| #ifndef PRODUCT |
| if (PrintIRWithLIR) { |
| tty->cr(); |
| } |
| #endif |
| |
| // LIR_Opr for unpinned constants shouldn't be referenced by other |
| // blocks so clear them out after processing the block. |
| for (int i = 0; i < _unpinned_constants.length(); i++) { |
| _unpinned_constants.at(i)->clear_operand(); |
| } |
| _unpinned_constants.trunc_to(0); |
| |
| // clear our any registers for other local constants |
| _constants.trunc_to(0); |
| _reg_for_constants.trunc_to(0); |
| } |
| |
| |
| void LIRGenerator::block_do(BlockBegin* block) { |
| CHECK_BAILOUT(); |
| |
| block_do_prolog(block); |
| set_block(block); |
| |
| for (Instruction* instr = block; instr != NULL; instr = instr->next()) { |
| if (instr->is_pinned()) do_root(instr); |
| } |
| |
| set_block(NULL); |
| block_do_epilog(block); |
| } |
| |
| |
| //-------------------------LIRGenerator----------------------------- |
| |
| // This is where the tree-walk starts; instr must be root; |
| void LIRGenerator::do_root(Value instr) { |
| CHECK_BAILOUT(); |
| |
| InstructionMark im(compilation(), instr); |
| |
| assert(instr->is_pinned(), "use only with roots"); |
| assert(instr->subst() == instr, "shouldn't have missed substitution"); |
| |
| instr->visit(this); |
| |
| assert(!instr->has_uses() || instr->operand()->is_valid() || |
| instr->as_Constant() != NULL || bailed_out(), "invalid item set"); |
| } |
| |
| |
| // This is called for each node in tree; the walk stops if a root is reached |
| void LIRGenerator::walk(Value instr) { |
| InstructionMark im(compilation(), instr); |
| //stop walk when encounter a root |
| if (instr->is_pinned() && instr->as_Phi() == NULL || instr->operand()->is_valid()) { |
| assert(instr->operand() != LIR_OprFact::illegalOpr || instr->as_Constant() != NULL, "this root has not yet been visited"); |
| } else { |
| assert(instr->subst() == instr, "shouldn't have missed substitution"); |
| instr->visit(this); |
| // assert(instr->use_count() > 0 || instr->as_Phi() != NULL, "leaf instruction must have a use"); |
| } |
| } |
| |
| |
| CodeEmitInfo* LIRGenerator::state_for(Instruction* x, ValueStack* state, bool ignore_xhandler) { |
| assert(state != NULL, "state must be defined"); |
| |
| #ifndef PRODUCT |
| state->verify(); |
| #endif |
| |
| ValueStack* s = state; |
| for_each_state(s) { |
| if (s->kind() == ValueStack::EmptyExceptionState) { |
| assert(s->stack_size() == 0 && s->locals_size() == 0 && (s->locks_size() == 0 || s->locks_size() == 1), "state must be empty"); |
| continue; |
| } |
| |
| int index; |
| Value value; |
| for_each_stack_value(s, index, value) { |
| assert(value->subst() == value, "missed substitution"); |
| if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { |
| walk(value); |
| assert(value->operand()->is_valid(), "must be evaluated now"); |
| } |
| } |
| |
| int bci = s->bci(); |
| IRScope* scope = s->scope(); |
| ciMethod* method = scope->method(); |
| |
| MethodLivenessResult liveness = method->liveness_at_bci(bci); |
| if (bci == SynchronizationEntryBCI) { |
| if (x->as_ExceptionObject() || x->as_Throw()) { |
| // all locals are dead on exit from the synthetic unlocker |
| liveness.clear(); |
| } else { |
| assert(x->as_MonitorEnter() || x->as_ProfileInvoke(), "only other cases are MonitorEnter and ProfileInvoke"); |
| } |
| } |
| if (!liveness.is_valid()) { |
| // Degenerate or breakpointed method. |
| bailout("Degenerate or breakpointed method"); |
| } else { |
| assert((int)liveness.size() == s->locals_size(), "error in use of liveness"); |
| for_each_local_value(s, index, value) { |
| assert(value->subst() == value, "missed substition"); |
| if (liveness.at(index) && !value->type()->is_illegal()) { |
| if (!value->is_pinned() && value->as_Constant() == NULL && value->as_Local() == NULL) { |
| walk(value); |
| assert(value->operand()->is_valid(), "must be evaluated now"); |
| } |
| } else { |
| // NULL out this local so that linear scan can assume that all non-NULL values are live. |
| s->invalidate_local(index); |
| } |
| } |
| } |
| } |
| |
| return new CodeEmitInfo(state, ignore_xhandler ? NULL : x->exception_handlers(), x->check_flag(Instruction::DeoptimizeOnException)); |
| } |
| |
| |
| CodeEmitInfo* LIRGenerator::state_for(Instruction* x) { |
| return state_for(x, x->exception_state()); |
| } |
| |
| |
| void LIRGenerator::klass2reg_with_patching(LIR_Opr r, ciMetadata* obj, CodeEmitInfo* info, bool need_resolve) { |
| /* C2 relies on constant pool entries being resolved (ciTypeFlow), so if TieredCompilation |
| * is active and the class hasn't yet been resolved we need to emit a patch that resolves |
| * the class. */ |
| if ((TieredCompilation && need_resolve) || !obj->is_loaded() || PatchALot) { |
| assert(info != NULL, "info must be set if class is not loaded"); |
| __ klass2reg_patch(NULL, r, info); |
| } else { |
| // no patching needed |
| __ metadata2reg(obj->constant_encoding(), r); |
| } |
| } |
| |
| |
| void LIRGenerator::array_range_check(LIR_Opr array, LIR_Opr index, |
| CodeEmitInfo* null_check_info, CodeEmitInfo* range_check_info) { |
| CodeStub* stub = new RangeCheckStub(range_check_info, index); |
| if (index->is_constant()) { |
| cmp_mem_int(lir_cond_belowEqual, array, arrayOopDesc::length_offset_in_bytes(), |
| index->as_jint(), null_check_info); |
| __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch |
| } else { |
| cmp_reg_mem(lir_cond_aboveEqual, index, array, |
| arrayOopDesc::length_offset_in_bytes(), T_INT, null_check_info); |
| __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch |
| } |
| } |
| |
| |
| void LIRGenerator::nio_range_check(LIR_Opr buffer, LIR_Opr index, LIR_Opr result, CodeEmitInfo* info) { |
| CodeStub* stub = new RangeCheckStub(info, index, true); |
| if (index->is_constant()) { |
| cmp_mem_int(lir_cond_belowEqual, buffer, java_nio_Buffer::limit_offset(), index->as_jint(), info); |
| __ branch(lir_cond_belowEqual, T_INT, stub); // forward branch |
| } else { |
| cmp_reg_mem(lir_cond_aboveEqual, index, buffer, |
| java_nio_Buffer::limit_offset(), T_INT, info); |
| __ branch(lir_cond_aboveEqual, T_INT, stub); // forward branch |
| } |
| __ move(index, result); |
| } |
| |
| |
| |
| void LIRGenerator::arithmetic_op(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp_op, CodeEmitInfo* info) { |
| LIR_Opr result_op = result; |
| LIR_Opr left_op = left; |
| LIR_Opr right_op = right; |
| |
| if (TwoOperandLIRForm && left_op != result_op) { |
| assert(right_op != result_op, "malformed"); |
| __ move(left_op, result_op); |
| left_op = result_op; |
| } |
| |
| switch(code) { |
| case Bytecodes::_dadd: |
| case Bytecodes::_fadd: |
| case Bytecodes::_ladd: |
| case Bytecodes::_iadd: __ add(left_op, right_op, result_op); break; |
| case Bytecodes::_fmul: |
| case Bytecodes::_lmul: __ mul(left_op, right_op, result_op); break; |
| |
| case Bytecodes::_dmul: |
| { |
| if (is_strictfp) { |
| __ mul_strictfp(left_op, right_op, result_op, tmp_op); break; |
| } else { |
| __ mul(left_op, right_op, result_op); break; |
| } |
| } |
| break; |
| |
| case Bytecodes::_imul: |
| { |
| bool did_strength_reduce = false; |
| |
| if (right->is_constant()) { |
| int c = right->as_jint(); |
| if (is_power_of_2(c)) { |
| // do not need tmp here |
| __ shift_left(left_op, exact_log2(c), result_op); |
| did_strength_reduce = true; |
| } else { |
| did_strength_reduce = strength_reduce_multiply(left_op, c, result_op, tmp_op); |
| } |
| } |
| // we couldn't strength reduce so just emit the multiply |
| if (!did_strength_reduce) { |
| __ mul(left_op, right_op, result_op); |
| } |
| } |
| break; |
| |
| case Bytecodes::_dsub: |
| case Bytecodes::_fsub: |
| case Bytecodes::_lsub: |
| case Bytecodes::_isub: __ sub(left_op, right_op, result_op); break; |
| |
| case Bytecodes::_fdiv: __ div (left_op, right_op, result_op); break; |
| // ldiv and lrem are implemented with a direct runtime call |
| |
| case Bytecodes::_ddiv: |
| { |
| if (is_strictfp) { |
| __ div_strictfp (left_op, right_op, result_op, tmp_op); break; |
| } else { |
| __ div (left_op, right_op, result_op); break; |
| } |
| } |
| break; |
| |
| case Bytecodes::_drem: |
| case Bytecodes::_frem: __ rem (left_op, right_op, result_op); break; |
| |
| default: ShouldNotReachHere(); |
| } |
| } |
| |
| |
| void LIRGenerator::arithmetic_op_int(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, LIR_Opr tmp) { |
| arithmetic_op(code, result, left, right, false, tmp); |
| } |
| |
| |
| void LIRGenerator::arithmetic_op_long(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, CodeEmitInfo* info) { |
| arithmetic_op(code, result, left, right, false, LIR_OprFact::illegalOpr, info); |
| } |
| |
| |
| void LIRGenerator::arithmetic_op_fpu(Bytecodes::Code code, LIR_Opr result, LIR_Opr left, LIR_Opr right, bool is_strictfp, LIR_Opr tmp) { |
| arithmetic_op(code, result, left, right, is_strictfp, tmp); |
| } |
| |
| |
| void LIRGenerator::shift_op(Bytecodes::Code code, LIR_Opr result_op, LIR_Opr value, LIR_Opr count, LIR_Opr tmp) { |
| if (TwoOperandLIRForm && value != result_op) { |
| assert(count != result_op, "malformed"); |
| __ move(value, result_op); |
| value = result_op; |
| } |
| |
| assert(count->is_constant() || count->is_register(), "must be"); |
| switch(code) { |
| case Bytecodes::_ishl: |
| case Bytecodes::_lshl: __ shift_left(value, count, result_op, tmp); break; |
| case Bytecodes::_ishr: |
| case Bytecodes::_lshr: __ shift_right(value, count, result_op, tmp); break; |
| case Bytecodes::_iushr: |
| case Bytecodes::_lushr: __ unsigned_shift_right(value, count, result_op, tmp); break; |
| default: ShouldNotReachHere(); |
| } |
| } |
| |
| |
| void LIRGenerator::logic_op (Bytecodes::Code code, LIR_Opr result_op, LIR_Opr left_op, LIR_Opr right_op) { |
| if (TwoOperandLIRForm && left_op != result_op) { |
| assert(right_op != result_op, "malformed"); |
| __ move(left_op, result_op); |
| left_op = result_op; |
| } |
| |
| switch(code) { |
| case Bytecodes::_iand: |
| case Bytecodes::_land: __ logical_and(left_op, right_op, result_op); break; |
| |
| case Bytecodes::_ior: |
| case Bytecodes::_lor: __ logical_or(left_op, right_op, result_op); break; |
| |
| case Bytecodes::_ixor: |
| case Bytecodes::_lxor: __ logical_xor(left_op, right_op, result_op); break; |
| |
| default: ShouldNotReachHere(); |
| } |
| } |
| |
| |
| void LIRGenerator::monitor_enter(LIR_Opr object, LIR_Opr lock, LIR_Opr hdr, LIR_Opr scratch, int monitor_no, CodeEmitInfo* info_for_exception, CodeEmitInfo* info) { |
| if (!GenerateSynchronizationCode) return; |
| // for slow path, use debug info for state after successful locking |
| CodeStub* slow_path = new MonitorEnterStub(object, lock, info); |
| __ load_stack_address_monitor(monitor_no, lock); |
| // for handling NullPointerException, use debug info representing just the lock stack before this monitorenter |
| __ lock_object(hdr, object, lock, scratch, slow_path, info_for_exception); |
| } |
| |
| |
| void LIRGenerator::monitor_exit(LIR_Opr object, LIR_Opr lock, LIR_Opr new_hdr, LIR_Opr scratch, int monitor_no) { |
| if (!GenerateSynchronizationCode) return; |
| // setup registers |
| LIR_Opr hdr = lock; |
| lock = new_hdr; |
| CodeStub* slow_path = new MonitorExitStub(lock, UseFastLocking, monitor_no); |
| __ load_stack_address_monitor(monitor_no, lock); |
| __ unlock_object(hdr, object, lock, scratch, slow_path); |
| } |
| |
| #ifndef PRODUCT |
| void LIRGenerator::print_if_not_loaded(const NewInstance* new_instance) { |
| if (PrintNotLoaded && !new_instance->klass()->is_loaded()) { |
| tty->print_cr(" ###class not loaded at new bci %d", new_instance->printable_bci()); |
| } else if (PrintNotLoaded && (TieredCompilation && new_instance->is_unresolved())) { |
| tty->print_cr(" ###class not resolved at new bci %d", new_instance->printable_bci()); |
| } |
| } |
| #endif |
| |
| void LIRGenerator::new_instance(LIR_Opr dst, ciInstanceKlass* klass, bool is_unresolved, LIR_Opr scratch1, LIR_Opr scratch2, LIR_Opr scratch3, LIR_Opr scratch4, LIR_Opr klass_reg, CodeEmitInfo* info) { |
| klass2reg_with_patching(klass_reg, klass, info, is_unresolved); |
| // If klass is not loaded we do not know if the klass has finalizers: |
| if (UseFastNewInstance && klass->is_loaded() |
| && !Klass::layout_helper_needs_slow_path(klass->layout_helper())) { |
| |
| Runtime1::StubID stub_id = klass->is_initialized() ? Runtime1::fast_new_instance_id : Runtime1::fast_new_instance_init_check_id; |
| |
| CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, stub_id); |
| |
| assert(klass->is_loaded(), "must be loaded"); |
| // allocate space for instance |
| assert(klass->size_helper() >= 0, "illegal instance size"); |
| const int instance_size = align_object_size(klass->size_helper()); |
| __ allocate_object(dst, scratch1, scratch2, scratch3, scratch4, |
| oopDesc::header_size(), instance_size, klass_reg, !klass->is_initialized(), slow_path); |
| } else { |
| CodeStub* slow_path = new NewInstanceStub(klass_reg, dst, klass, info, Runtime1::new_instance_id); |
| __ branch(lir_cond_always, T_ILLEGAL, slow_path); |
| __ branch_destination(slow_path->continuation()); |
| } |
| } |
| |
| |
| static bool is_constant_zero(Instruction* inst) { |
| IntConstant* c = inst->type()->as_IntConstant(); |
| if (c) { |
| return (c->value() == 0); |
| } |
| return false; |
| } |
| |
| |
| static bool positive_constant(Instruction* inst) { |
| IntConstant* c = inst->type()->as_IntConstant(); |
| if (c) { |
| return (c->value() >= 0); |
| } |
| return false; |
| } |
| |
| |
| static ciArrayKlass* as_array_klass(ciType* type) { |
| if (type != NULL && type->is_array_klass() && type->is_loaded()) { |
| return (ciArrayKlass*)type; |
| } else { |
| return NULL; |
| } |
| } |
| |
| static ciType* phi_declared_type(Phi* phi) { |
| ciType* t = phi->operand_at(0)->declared_type(); |
| if (t == NULL) { |
| return NULL; |
| } |
| for(int i = 1; i < phi->operand_count(); i++) { |
| if (t != phi->operand_at(i)->declared_type()) { |
| return NULL; |
| } |
| } |
| return t; |
| } |
| |
| void LIRGenerator::arraycopy_helper(Intrinsic* x, int* flagsp, ciArrayKlass** expected_typep) { |
| Instruction* src = x->argument_at(0); |
| Instruction* src_pos = x->argument_at(1); |
| Instruction* dst = x->argument_at(2); |
| Instruction* dst_pos = x->argument_at(3); |
| Instruction* length = x->argument_at(4); |
| |
| // first try to identify the likely type of the arrays involved |
| ciArrayKlass* expected_type = NULL; |
| bool is_exact = false, src_objarray = false, dst_objarray = false; |
| { |
| ciArrayKlass* src_exact_type = as_array_klass(src->exact_type()); |
| ciArrayKlass* src_declared_type = as_array_klass(src->declared_type()); |
| Phi* phi; |
| if (src_declared_type == NULL && (phi = src->as_Phi()) != NULL) { |
| src_declared_type = as_array_klass(phi_declared_type(phi)); |
| } |
| ciArrayKlass* dst_exact_type = as_array_klass(dst->exact_type()); |
| ciArrayKlass* dst_declared_type = as_array_klass(dst->declared_type()); |
| if (dst_declared_type == NULL && (phi = dst->as_Phi()) != NULL) { |
| dst_declared_type = as_array_klass(phi_declared_type(phi)); |
| } |
| |
| if (src_exact_type != NULL && src_exact_type == dst_exact_type) { |
| // the types exactly match so the type is fully known |
| is_exact = true; |
| expected_type = src_exact_type; |
| } else if (dst_exact_type != NULL && dst_exact_type->is_obj_array_klass()) { |
| ciArrayKlass* dst_type = (ciArrayKlass*) dst_exact_type; |
| ciArrayKlass* src_type = NULL; |
| if (src_exact_type != NULL && src_exact_type->is_obj_array_klass()) { |
| src_type = (ciArrayKlass*) src_exact_type; |
| } else if (src_declared_type != NULL && src_declared_type->is_obj_array_klass()) { |
| src_type = (ciArrayKlass*) src_declared_type; |
| } |
| if (src_type != NULL) { |
| if (src_type->element_type()->is_subtype_of(dst_type->element_type())) { |
| is_exact = true; |
| expected_type = dst_type; |
| } |
| } |
| } |
| // at least pass along a good guess |
| if (expected_type == NULL) expected_type = dst_exact_type; |
| if (expected_type == NULL) expected_type = src_declared_type; |
| if (expected_type == NULL) expected_type = dst_declared_type; |
| |
| src_objarray = (src_exact_type && src_exact_type->is_obj_array_klass()) || (src_declared_type && src_declared_type->is_obj_array_klass()); |
| dst_objarray = (dst_exact_type && dst_exact_type->is_obj_array_klass()) || (dst_declared_type && dst_declared_type->is_obj_array_klass()); |
| } |
| |
| // if a probable array type has been identified, figure out if any |
| // of the required checks for a fast case can be elided. |
| int flags = LIR_OpArrayCopy::all_flags; |
| |
| if (!src_objarray) |
| flags &= ~LIR_OpArrayCopy::src_objarray; |
| if (!dst_objarray) |
| flags &= ~LIR_OpArrayCopy::dst_objarray; |
| |
| if (!x->arg_needs_null_check(0)) |
| flags &= ~LIR_OpArrayCopy::src_null_check; |
| if (!x->arg_needs_null_check(2)) |
| flags &= ~LIR_OpArrayCopy::dst_null_check; |
| |
| |
| if (expected_type != NULL) { |
| Value length_limit = NULL; |
| |
| IfOp* ifop = length->as_IfOp(); |
| if (ifop != NULL) { |
| // look for expressions like min(v, a.length) which ends up as |
| // x > y ? y : x or x >= y ? y : x |
| if ((ifop->cond() == If::gtr || ifop->cond() == If::geq) && |
| ifop->x() == ifop->fval() && |
| ifop->y() == ifop->tval()) { |
| length_limit = ifop->y(); |
| } |
| } |
| |
| // try to skip null checks and range checks |
| NewArray* src_array = src->as_NewArray(); |
| if (src_array != NULL) { |
| flags &= ~LIR_OpArrayCopy::src_null_check; |
| if (length_limit != NULL && |
| src_array->length() == length_limit && |
| is_constant_zero(src_pos)) { |
| flags &= ~LIR_OpArrayCopy::src_range_check; |
| } |
| } |
| |
| NewArray* dst_array = dst->as_NewArray(); |
| if (dst_array != NULL) { |
| flags &= ~LIR_OpArrayCopy::dst_null_check; |
| if (length_limit != NULL && |
| dst_array->length() == length_limit && |
| is_constant_zero(dst_pos)) { |
| flags &= ~LIR_OpArrayCopy::dst_range_check; |
| } |
| } |
| |
| // check from incoming constant values |
| if (positive_constant(src_pos)) |
| flags &= ~LIR_OpArrayCopy::src_pos_positive_check; |
| if (positive_constant(dst_pos)) |
| flags &= ~LIR_OpArrayCopy::dst_pos_positive_check; |
| if (positive_constant(length)) |
| flags &= ~LIR_OpArrayCopy::length_positive_check; |
| |
| // see if the range check can be elided, which might also imply |
| // that src or dst is non-null. |
| ArrayLength* al = length->as_ArrayLength(); |
| if (al != NULL) { |
| if (al->array() == src) { |
| // it's the length of the source array |
| flags &= ~LIR_OpArrayCopy::length_positive_check; |
| flags &= ~LIR_OpArrayCopy::src_null_check; |
| if (is_constant_zero(src_pos)) |
| flags &= ~LIR_OpArrayCopy::src_range_check; |
| } |
| if (al->array() == dst) { |
| // it's the length of the destination array |
| flags &= ~LIR_OpArrayCopy::length_positive_check; |
| flags &= ~LIR_OpArrayCopy::dst_null_check; |
| if (is_constant_zero(dst_pos)) |
| flags &= ~LIR_OpArrayCopy::dst_range_check; |
| } |
| } |
| if (is_exact) { |
| flags &= ~LIR_OpArrayCopy::type_check; |
| } |
| } |
| |
| IntConstant* src_int = src_pos->type()->as_IntConstant(); |
| IntConstant* dst_int = dst_pos->type()->as_IntConstant(); |
| if (src_int && dst_int) { |
| int s_offs = src_int->value(); |
| int d_offs = dst_int->value(); |
| if (src_int->value() >= dst_int->value()) { |
| flags &= ~LIR_OpArrayCopy::overlapping; |
| } |
| if (expected_type != NULL) { |
| BasicType t = expected_type->element_type()->basic_type(); |
| int element_size = type2aelembytes(t); |
| if (((arrayOopDesc::base_offset_in_bytes(t) + s_offs * element_size) % HeapWordSize == 0) && |
| ((arrayOopDesc::base_offset_in_bytes(t) + d_offs * element_size) % HeapWordSize == 0)) { |
| flags &= ~LIR_OpArrayCopy::unaligned; |
| } |
| } |
| } else if (src_pos == dst_pos || is_constant_zero(dst_pos)) { |
| // src and dest positions are the same, or dst is zero so assume |
| // nonoverlapping copy. |
| flags &= ~LIR_OpArrayCopy::overlapping; |
| } |
| |
| if (src == dst) { |
| // moving within a single array so no type checks are needed |
| if (flags & LIR_OpArrayCopy::type_check) { |
| flags &= ~LIR_OpArrayCopy::type_check; |
| } |
| } |
| *flagsp = flags; |
| *expected_typep = (ciArrayKlass*)expected_type; |
| } |
| |
| |
| LIR_Opr LIRGenerator::round_item(LIR_Opr opr) { |
| assert(opr->is_register(), "why spill if item is not register?"); |
| |
| if (RoundFPResults && UseSSE < 1 && opr->is_single_fpu()) { |
| LIR_Opr result = new_register(T_FLOAT); |
| set_vreg_flag(result, must_start_in_memory); |
| assert(opr->is_register(), "only a register can be spilled"); |
| assert(opr->value_type()->is_float(), "rounding only for floats available"); |
| __ roundfp(opr, LIR_OprFact::illegalOpr, result); |
| return result; |
| } |
| return opr; |
| } |
| |
| |
| LIR_Opr LIRGenerator::force_to_spill(LIR_Opr value, BasicType t) { |
| assert(type2size[t] == type2size[value->type()], |
| err_msg_res("size mismatch: t=%s, value->type()=%s", type2name(t), type2name(value->type()))); |
| if (!value->is_register()) { |
| // force into a register |
| LIR_Opr r = new_register(value->type()); |
| __ move(value, r); |
| value = r; |
| } |
| |
| // create a spill location |
| LIR_Opr tmp = new_register(t); |
| set_vreg_flag(tmp, LIRGenerator::must_start_in_memory); |
| |
| // move from register to spill |
| __ move(value, tmp); |
| return tmp; |
| } |
| |
| void LIRGenerator::profile_branch(If* if_instr, If::Condition cond) { |
| if (if_instr->should_profile()) { |
| ciMethod* method = if_instr->profiled_method(); |
| assert(method != NULL, "method should be set if branch is profiled"); |
| ciMethodData* md = method->method_data_or_null(); |
| assert(md != NULL, "Sanity"); |
| ciProfileData* data = md->bci_to_data(if_instr->profiled_bci()); |
| assert(data != NULL, "must have profiling data"); |
| assert(data->is_BranchData(), "need BranchData for two-way branches"); |
| int taken_count_offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); |
| int not_taken_count_offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); |
| if (if_instr->is_swapped()) { |
| int t = taken_count_offset; |
| taken_count_offset = not_taken_count_offset; |
| not_taken_count_offset = t; |
| } |
| |
| LIR_Opr md_reg = new_register(T_METADATA); |
| __ metadata2reg(md->constant_encoding(), md_reg); |
| |
| LIR_Opr data_offset_reg = new_pointer_register(); |
| __ cmove(lir_cond(cond), |
| LIR_OprFact::intptrConst(taken_count_offset), |
| LIR_OprFact::intptrConst(not_taken_count_offset), |
| data_offset_reg, as_BasicType(if_instr->x()->type())); |
| |
| // MDO cells are intptr_t, so the data_reg width is arch-dependent. |
| LIR_Opr data_reg = new_pointer_register(); |
| LIR_Address* data_addr = new LIR_Address(md_reg, data_offset_reg, data_reg->type()); |
| __ move(data_addr, data_reg); |
| // Use leal instead of add to avoid destroying condition codes on x86 |
| LIR_Address* fake_incr_value = new LIR_Address(data_reg, DataLayout::counter_increment, T_INT); |
| __ leal(LIR_OprFact::address(fake_incr_value), data_reg); |
| __ move(data_reg, data_addr); |
| } |
| } |
| |
| // Phi technique: |
| // This is about passing live values from one basic block to the other. |
| // In code generated with Java it is rather rare that more than one |
| // value is on the stack from one basic block to the other. |
| // We optimize our technique for efficient passing of one value |
| // (of type long, int, double..) but it can be extended. |
| // When entering or leaving a basic block, all registers and all spill |
| // slots are release and empty. We use the released registers |
| // and spill slots to pass the live values from one block |
| // to the other. The topmost value, i.e., the value on TOS of expression |
| // stack is passed in registers. All other values are stored in spilling |
| // area. Every Phi has an index which designates its spill slot |
| // At exit of a basic block, we fill the register(s) and spill slots. |
| // At entry of a basic block, the block_prolog sets up the content of phi nodes |
| // and locks necessary registers and spilling slots. |
| |
| |
| // move current value to referenced phi function |
| void LIRGenerator::move_to_phi(PhiResolver* resolver, Value cur_val, Value sux_val) { |
| Phi* phi = sux_val->as_Phi(); |
| // cur_val can be null without phi being null in conjunction with inlining |
| if (phi != NULL && cur_val != NULL && cur_val != phi && !phi->is_illegal()) { |
| LIR_Opr operand = cur_val->operand(); |
| if (cur_val->operand()->is_illegal()) { |
| assert(cur_val->as_Constant() != NULL || cur_val->as_Local() != NULL, |
| "these can be produced lazily"); |
| operand = operand_for_instruction(cur_val); |
| } |
| resolver->move(operand, operand_for_instruction(phi)); |
| } |
| } |
| |
| |
| // Moves all stack values into their PHI position |
| void LIRGenerator::move_to_phi(ValueStack* cur_state) { |
| BlockBegin* bb = block(); |
| if (bb->number_of_sux() == 1) { |
| BlockBegin* sux = bb->sux_at(0); |
| assert(sux->number_of_preds() > 0, "invalid CFG"); |
| |
| // a block with only one predecessor never has phi functions |
| if (sux->number_of_preds() > 1) { |
| int max_phis = cur_state->stack_size() + cur_state->locals_size(); |
| PhiResolver resolver(this, _virtual_register_number + max_phis * 2); |
| |
| ValueStack* sux_state = sux->state(); |
| Value sux_value; |
| int index; |
| |
| assert(cur_state->scope() == sux_state->scope(), "not matching"); |
| assert(cur_state->locals_size() == sux_state->locals_size(), "not matching"); |
| assert(cur_state->stack_size() == sux_state->stack_size(), "not matching"); |
| |
| for_each_stack_value(sux_state, index, sux_value) { |
| move_to_phi(&resolver, cur_state->stack_at(index), sux_value); |
| } |
| |
| for_each_local_value(sux_state, index, sux_value) { |
| move_to_phi(&resolver, cur_state->local_at(index), sux_value); |
| } |
| |
| assert(cur_state->caller_state() == sux_state->caller_state(), "caller states must be equal"); |
| } |
| } |
| } |
| |
| |
| LIR_Opr LIRGenerator::new_register(BasicType type) { |
| int vreg = _virtual_register_number; |
| // add a little fudge factor for the bailout, since the bailout is |
| // only checked periodically. This gives a few extra registers to |
| // hand out before we really run out, which helps us keep from |
| // tripping over assertions. |
| if (vreg + 20 >= LIR_OprDesc::vreg_max) { |
| bailout("out of virtual registers"); |
| if (vreg + 2 >= LIR_OprDesc::vreg_max) { |
| // wrap it around |
| _virtual_register_number = LIR_OprDesc::vreg_base; |
| } |
| } |
| _virtual_register_number += 1; |
| return LIR_OprFact::virtual_register(vreg, type); |
| } |
| |
| |
| // Try to lock using register in hint |
| LIR_Opr LIRGenerator::rlock(Value instr) { |
| return new_register(instr->type()); |
| } |
| |
| |
| // does an rlock and sets result |
| LIR_Opr LIRGenerator::rlock_result(Value x) { |
| LIR_Opr reg = rlock(x); |
| set_result(x, reg); |
| return reg; |
| } |
| |
| |
| // does an rlock and sets result |
| LIR_Opr LIRGenerator::rlock_result(Value x, BasicType type) { |
| LIR_Opr reg; |
| switch (type) { |
| case T_BYTE: |
| case T_BOOLEAN: |
| reg = rlock_byte(type); |
| break; |
| default: |
| reg = rlock(x); |
| break; |
| } |
| |
| set_result(x, reg); |
| return reg; |
| } |
| |
| |
| //--------------------------------------------------------------------- |
| ciObject* LIRGenerator::get_jobject_constant(Value value) { |
| ObjectType* oc = value->type()->as_ObjectType(); |
| if (oc) { |
| return oc->constant_value(); |
| } |
| return NULL; |
| } |
| |
| |
| void LIRGenerator::do_ExceptionObject(ExceptionObject* x) { |
| assert(block()->is_set(BlockBegin::exception_entry_flag), "ExceptionObject only allowed in exception handler block"); |
| assert(block()->next() == x, "ExceptionObject must be first instruction of block"); |
| |
| // no moves are created for phi functions at the begin of exception |
| // handlers, so assign operands manually here |
| for_each_phi_fun(block(), phi, |
| operand_for_instruction(phi)); |
| |
| LIR_Opr thread_reg = getThreadPointer(); |
| __ move_wide(new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT), |
| exceptionOopOpr()); |
| __ move_wide(LIR_OprFact::oopConst(NULL), |
| new LIR_Address(thread_reg, in_bytes(JavaThread::exception_oop_offset()), T_OBJECT)); |
| __ move_wide(LIR_OprFact::oopConst(NULL), |
| new LIR_Address(thread_reg, in_bytes(JavaThread::exception_pc_offset()), T_OBJECT)); |
| |
| LIR_Opr result = new_register(T_OBJECT); |
| __ move(exceptionOopOpr(), result); |
| set_result(x, result); |
| } |
| |
| |
| //---------------------------------------------------------------------- |
| //---------------------------------------------------------------------- |
| //---------------------------------------------------------------------- |
| //---------------------------------------------------------------------- |
| // visitor functions |
| //---------------------------------------------------------------------- |
| //---------------------------------------------------------------------- |
| //---------------------------------------------------------------------- |
| //---------------------------------------------------------------------- |
| |
| void LIRGenerator::do_Phi(Phi* x) { |
| // phi functions are never visited directly |
| ShouldNotReachHere(); |
| } |
| |
| |
| // Code for a constant is generated lazily unless the constant is frequently used and can't be inlined. |
| void LIRGenerator::do_Constant(Constant* x) { |
| if (x->state_before() != NULL) { |
| // Any constant with a ValueStack requires patching so emit the patch here |
| LIR_Opr reg = rlock_result(x); |
| CodeEmitInfo* info = state_for(x, x->state_before()); |
| __ oop2reg_patch(NULL, reg, info); |
| } else if (x->use_count() > 1 && !can_inline_as_constant(x)) { |
| if (!x->is_pinned()) { |
| // unpinned constants are handled specially so that they can be |
| // put into registers when they are used multiple times within a |
| // block. After the block completes their operand will be |
| // cleared so that other blocks can't refer to that register. |
| set_result(x, load_constant(x)); |
| } else { |
| LIR_Opr res = x->operand(); |
| if (!res->is_valid()) { |
| res = LIR_OprFact::value_type(x->type()); |
| } |
| if (res->is_constant()) { |
| LIR_Opr reg = rlock_result(x); |
| __ move(res, reg); |
| } else { |
| set_result(x, res); |
| } |
| } |
| } else { |
| set_result(x, LIR_OprFact::value_type(x->type())); |
| } |
| } |
| |
| |
| void LIRGenerator::do_Local(Local* x) { |
| // operand_for_instruction has the side effect of setting the result |
| // so there's no need to do it here. |
| operand_for_instruction(x); |
| } |
| |
| |
| void LIRGenerator::do_IfInstanceOf(IfInstanceOf* x) { |
| Unimplemented(); |
| } |
| |
| |
| void LIRGenerator::do_Return(Return* x) { |
| if (compilation()->env()->dtrace_method_probes()) { |
| BasicTypeList signature; |
| signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread |
| signature.append(T_METADATA); // Method* |
| LIR_OprList* args = new LIR_OprList(); |
| args->append(getThreadPointer()); |
| LIR_Opr meth = new_register(T_METADATA); |
| __ metadata2reg(method()->constant_encoding(), meth); |
| args->append(meth); |
| call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), voidType, NULL); |
| } |
| |
| if (x->type()->is_void()) { |
| __ return_op(LIR_OprFact::illegalOpr); |
| } else { |
| LIR_Opr reg = result_register_for(x->type(), /*callee=*/true); |
| LIRItem result(x->result(), this); |
| |
| result.load_item_force(reg); |
| __ return_op(result.result()); |
| } |
| set_no_result(x); |
| } |
| |
| // Examble: ref.get() |
| // Combination of LoadField and g1 pre-write barrier |
| void LIRGenerator::do_Reference_get(Intrinsic* x) { |
| |
| const int referent_offset = java_lang_ref_Reference::referent_offset; |
| guarantee(referent_offset > 0, "referent offset not initialized"); |
| |
| assert(x->number_of_arguments() == 1, "wrong type"); |
| |
| LIRItem reference(x->argument_at(0), this); |
| reference.load_item(); |
| |
| // need to perform the null check on the reference objecy |
| CodeEmitInfo* info = NULL; |
| if (x->needs_null_check()) { |
| info = state_for(x); |
| } |
| |
| LIR_Address* referent_field_adr = |
| new LIR_Address(reference.result(), referent_offset, T_OBJECT); |
| |
| LIR_Opr result = rlock_result(x); |
| |
| __ load(referent_field_adr, result, info); |
| |
| // Register the value in the referent field with the pre-barrier |
| pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */, |
| result /* pre_val */, |
| false /* do_load */, |
| false /* patch */, |
| NULL /* info */); |
| } |
| |
| // Example: clazz.isInstance(object) |
| void LIRGenerator::do_isInstance(Intrinsic* x) { |
| assert(x->number_of_arguments() == 2, "wrong type"); |
| |
| // TODO could try to substitute this node with an equivalent InstanceOf |
| // if clazz is known to be a constant Class. This will pick up newly found |
| // constants after HIR construction. I'll leave this to a future change. |
| |
| // as a first cut, make a simple leaf call to runtime to stay platform independent. |
| // could follow the aastore example in a future change. |
| |
| LIRItem clazz(x->argument_at(0), this); |
| LIRItem object(x->argument_at(1), this); |
| clazz.load_item(); |
| object.load_item(); |
| LIR_Opr result = rlock_result(x); |
| |
| // need to perform null check on clazz |
| if (x->needs_null_check()) { |
| CodeEmitInfo* info = state_for(x); |
| __ null_check(clazz.result(), info); |
| } |
| |
| LIR_Opr call_result = call_runtime(clazz.value(), object.value(), |
| CAST_FROM_FN_PTR(address, Runtime1::is_instance_of), |
| x->type(), |
| NULL); // NULL CodeEmitInfo results in a leaf call |
| __ move(call_result, result); |
| } |
| |
| // Example: object.getClass () |
| void LIRGenerator::do_getClass(Intrinsic* x) { |
| assert(x->number_of_arguments() == 1, "wrong type"); |
| |
| LIRItem rcvr(x->argument_at(0), this); |
| rcvr.load_item(); |
| LIR_Opr temp = new_register(T_METADATA); |
| LIR_Opr result = rlock_result(x); |
| |
| // need to perform the null check on the rcvr |
| CodeEmitInfo* info = NULL; |
| if (x->needs_null_check()) { |
| info = state_for(x); |
| } |
| |
| // FIXME T_ADDRESS should actually be T_METADATA but it can't because the |
| // meaning of these two is mixed up (see JDK-8026837). |
| __ move(new LIR_Address(rcvr.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), temp, info); |
| __ move_wide(new LIR_Address(temp, in_bytes(Klass::java_mirror_offset()), T_OBJECT), result); |
| } |
| |
| |
| // Example: Thread.currentThread() |
| void LIRGenerator::do_currentThread(Intrinsic* x) { |
| assert(x->number_of_arguments() == 0, "wrong type"); |
| LIR_Opr reg = rlock_result(x); |
| __ move_wide(new LIR_Address(getThreadPointer(), in_bytes(JavaThread::threadObj_offset()), T_OBJECT), reg); |
| } |
| |
| |
| void LIRGenerator::do_RegisterFinalizer(Intrinsic* x) { |
| assert(x->number_of_arguments() == 1, "wrong type"); |
| LIRItem receiver(x->argument_at(0), this); |
| |
| receiver.load_item(); |
| BasicTypeList signature; |
| signature.append(T_OBJECT); // receiver |
| LIR_OprList* args = new LIR_OprList(); |
| args->append(receiver.result()); |
| CodeEmitInfo* info = state_for(x, x->state()); |
| call_runtime(&signature, args, |
| CAST_FROM_FN_PTR(address, Runtime1::entry_for(Runtime1::register_finalizer_id)), |
| voidType, info); |
| |
| set_no_result(x); |
| } |
| |
| |
| //------------------------local access-------------------------------------- |
| |
| LIR_Opr LIRGenerator::operand_for_instruction(Instruction* x) { |
| if (x->operand()->is_illegal()) { |
| Constant* c = x->as_Constant(); |
| if (c != NULL) { |
| x->set_operand(LIR_OprFact::value_type(c->type())); |
| } else { |
| assert(x->as_Phi() || x->as_Local() != NULL, "only for Phi and Local"); |
| // allocate a virtual register for this local or phi |
| x->set_operand(rlock(x)); |
| _instruction_for_operand.at_put_grow(x->operand()->vreg_number(), x, NULL); |
| } |
| } |
| return x->operand(); |
| } |
| |
| |
| Instruction* LIRGenerator::instruction_for_opr(LIR_Opr opr) { |
| if (opr->is_virtual()) { |
| return instruction_for_vreg(opr->vreg_number()); |
| } |
| return NULL; |
| } |
| |
| |
| Instruction* LIRGenerator::instruction_for_vreg(int reg_num) { |
| if (reg_num < _instruction_for_operand.length()) { |
| return _instruction_for_operand.at(reg_num); |
| } |
| return NULL; |
| } |
| |
| |
| void LIRGenerator::set_vreg_flag(int vreg_num, VregFlag f) { |
| if (_vreg_flags.size_in_bits() == 0) { |
| BitMap2D temp(100, num_vreg_flags); |
| temp.clear(); |
| _vreg_flags = temp; |
| } |
| _vreg_flags.at_put_grow(vreg_num, f, true); |
| } |
| |
| bool LIRGenerator::is_vreg_flag_set(int vreg_num, VregFlag f) { |
| if (!_vreg_flags.is_valid_index(vreg_num, f)) { |
| return false; |
| } |
| return _vreg_flags.at(vreg_num, f); |
| } |
| |
| |
| // Block local constant handling. This code is useful for keeping |
| // unpinned constants and constants which aren't exposed in the IR in |
| // registers. Unpinned Constant instructions have their operands |
| // cleared when the block is finished so that other blocks can't end |
| // up referring to their registers. |
| |
| LIR_Opr LIRGenerator::load_constant(Constant* x) { |
| assert(!x->is_pinned(), "only for unpinned constants"); |
| _unpinned_constants.append(x); |
| return load_constant(LIR_OprFact::value_type(x->type())->as_constant_ptr()); |
| } |
| |
| |
| LIR_Opr LIRGenerator::load_constant(LIR_Const* c) { |
| BasicType t = c->type(); |
| for (int i = 0; i < _constants.length(); i++) { |
| LIR_Const* other = _constants.at(i); |
| if (t == other->type()) { |
| switch (t) { |
| case T_INT: |
| case T_FLOAT: |
| if (c->as_jint_bits() != other->as_jint_bits()) continue; |
| break; |
| case T_LONG: |
| case T_DOUBLE: |
| if (c->as_jint_hi_bits() != other->as_jint_hi_bits()) continue; |
| if (c->as_jint_lo_bits() != other->as_jint_lo_bits()) continue; |
| break; |
| case T_OBJECT: |
| if (c->as_jobject() != other->as_jobject()) continue; |
| break; |
| } |
| return _reg_for_constants.at(i); |
| } |
| } |
| |
| LIR_Opr result = new_register(t); |
| __ move((LIR_Opr)c, result); |
| _constants.append(c); |
| _reg_for_constants.append(result); |
| return result; |
| } |
| |
| // Various barriers |
| |
| void LIRGenerator::pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, |
| bool do_load, bool patch, CodeEmitInfo* info) { |
| // Do the pre-write barrier, if any. |
| switch (_bs->kind()) { |
| #if INCLUDE_ALL_GCS |
| case BarrierSet::G1SATBCTLogging: |
| G1SATBCardTableModRef_pre_barrier(addr_opr, pre_val, do_load, patch, info); |
| break; |
| #endif // INCLUDE_ALL_GCS |
| case BarrierSet::CardTableForRS: |
| case BarrierSet::CardTableExtension: |
| // No pre barriers |
| break; |
| case BarrierSet::ModRef: |
| // No pre barriers |
| break; |
| default : |
| ShouldNotReachHere(); |
| |
| } |
| } |
| |
| void LIRGenerator::post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { |
| switch (_bs->kind()) { |
| #if INCLUDE_ALL_GCS |
| case BarrierSet::G1SATBCTLogging: |
| G1SATBCardTableModRef_post_barrier(addr, new_val); |
| break; |
| #endif // INCLUDE_ALL_GCS |
| case BarrierSet::CardTableForRS: |
| case BarrierSet::CardTableExtension: |
| CardTableModRef_post_barrier(addr, new_val); |
| break; |
| case BarrierSet::ModRef: |
| // No post barriers |
| break; |
| default : |
| ShouldNotReachHere(); |
| } |
| } |
| |
| //////////////////////////////////////////////////////////////////////// |
| #if INCLUDE_ALL_GCS |
| |
| void LIRGenerator::G1SATBCardTableModRef_pre_barrier(LIR_Opr addr_opr, LIR_Opr pre_val, |
| bool do_load, bool patch, CodeEmitInfo* info) { |
| // First we test whether marking is in progress. |
| BasicType flag_type; |
| if (in_bytes(PtrQueue::byte_width_of_active()) == 4) { |
| flag_type = T_INT; |
| } else { |
| guarantee(in_bytes(PtrQueue::byte_width_of_active()) == 1, |
| "Assumption"); |
| // Use unsigned type T_BOOLEAN here rather than signed T_BYTE since some platforms, eg. ARM, |
| // need to use unsigned instructions to use the large offset to load the satb_mark_queue. |
| flag_type = T_BOOLEAN; |
| } |
| LIR_Opr thrd = getThreadPointer(); |
| LIR_Address* mark_active_flag_addr = |
| new LIR_Address(thrd, |
| in_bytes(JavaThread::satb_mark_queue_offset() + |
| PtrQueue::byte_offset_of_active()), |
| flag_type); |
| // Read the marking-in-progress flag. |
| LIR_Opr flag_val = new_register(T_INT); |
| __ load(mark_active_flag_addr, flag_val); |
| __ cmp(lir_cond_notEqual, flag_val, LIR_OprFact::intConst(0)); |
| |
| LIR_PatchCode pre_val_patch_code = lir_patch_none; |
| |
| CodeStub* slow; |
| |
| if (do_load) { |
| assert(pre_val == LIR_OprFact::illegalOpr, "sanity"); |
| assert(addr_opr != LIR_OprFact::illegalOpr, "sanity"); |
| |
| if (patch) |
| pre_val_patch_code = lir_patch_normal; |
| |
| pre_val = new_register(T_OBJECT); |
| |
| if (!addr_opr->is_address()) { |
| assert(addr_opr->is_register(), "must be"); |
| addr_opr = LIR_OprFact::address(new LIR_Address(addr_opr, T_OBJECT)); |
| } |
| slow = new G1PreBarrierStub(addr_opr, pre_val, pre_val_patch_code, info); |
| } else { |
| assert(addr_opr == LIR_OprFact::illegalOpr, "sanity"); |
| assert(pre_val->is_register(), "must be"); |
| assert(pre_val->type() == T_OBJECT, "must be an object"); |
| assert(info == NULL, "sanity"); |
| |
| slow = new G1PreBarrierStub(pre_val); |
| } |
| |
| __ branch(lir_cond_notEqual, T_INT, slow); |
| __ branch_destination(slow->continuation()); |
| } |
| |
| void LIRGenerator::G1SATBCardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { |
| // If the "new_val" is a constant NULL, no barrier is necessary. |
| if (new_val->is_constant() && |
| new_val->as_constant_ptr()->as_jobject() == NULL) return; |
| |
| if (!new_val->is_register()) { |
| LIR_Opr new_val_reg = new_register(T_OBJECT); |
| if (new_val->is_constant()) { |
| __ move(new_val, new_val_reg); |
| } else { |
| __ leal(new_val, new_val_reg); |
| } |
| new_val = new_val_reg; |
| } |
| assert(new_val->is_register(), "must be a register at this point"); |
| |
| if (addr->is_address()) { |
| LIR_Address* address = addr->as_address_ptr(); |
| LIR_Opr ptr = new_pointer_register(); |
| if (!address->index()->is_valid() && address->disp() == 0) { |
| __ move(address->base(), ptr); |
| } else { |
| assert(address->disp() != max_jint, "lea doesn't support patched addresses!"); |
| __ leal(addr, ptr); |
| } |
| addr = ptr; |
| } |
| assert(addr->is_register(), "must be a register at this point"); |
| |
| LIR_Opr xor_res = new_pointer_register(); |
| LIR_Opr xor_shift_res = new_pointer_register(); |
| if (TwoOperandLIRForm ) { |
| __ move(addr, xor_res); |
| __ logical_xor(xor_res, new_val, xor_res); |
| __ move(xor_res, xor_shift_res); |
| __ unsigned_shift_right(xor_shift_res, |
| LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes), |
| xor_shift_res, |
| LIR_OprDesc::illegalOpr()); |
| } else { |
| __ logical_xor(addr, new_val, xor_res); |
| __ unsigned_shift_right(xor_res, |
| LIR_OprFact::intConst(HeapRegion::LogOfHRGrainBytes), |
| xor_shift_res, |
| LIR_OprDesc::illegalOpr()); |
| } |
| |
| if (!new_val->is_register()) { |
| LIR_Opr new_val_reg = new_register(T_OBJECT); |
| __ leal(new_val, new_val_reg); |
| new_val = new_val_reg; |
| } |
| assert(new_val->is_register(), "must be a register at this point"); |
| |
| __ cmp(lir_cond_notEqual, xor_shift_res, LIR_OprFact::intptrConst(NULL_WORD)); |
| |
| CodeStub* slow = new G1PostBarrierStub(addr, new_val); |
| __ branch(lir_cond_notEqual, LP64_ONLY(T_LONG) NOT_LP64(T_INT), slow); |
| __ branch_destination(slow->continuation()); |
| } |
| |
| #endif // INCLUDE_ALL_GCS |
| //////////////////////////////////////////////////////////////////////// |
| |
| void LIRGenerator::CardTableModRef_post_barrier(LIR_OprDesc* addr, LIR_OprDesc* new_val) { |
| CardTableModRefBS* ct = barrier_set_cast<CardTableModRefBS>(_bs); |
| assert(sizeof(*(ct->byte_map_base)) == sizeof(jbyte), "adjust this code"); |
| LIR_Const* card_table_base = new LIR_Const(ct->byte_map_base); |
| if (addr->is_address()) { |
| LIR_Address* address = addr->as_address_ptr(); |
| // ptr cannot be an object because we use this barrier for array card marks |
| // and addr can point in the middle of an array. |
| LIR_Opr ptr = new_pointer_register(); |
| if (!address->index()->is_valid() && address->disp() == 0) { |
| __ move(address->base(), ptr); |
| } else { |
| assert(address->disp() != max_jint, "lea doesn't support patched addresses!"); |
| __ leal(addr, ptr); |
| } |
| addr = ptr; |
| } |
| assert(addr->is_register(), "must be a register at this point"); |
| |
| #ifdef CARDTABLEMODREF_POST_BARRIER_HELPER |
| CardTableModRef_post_barrier_helper(addr, card_table_base); |
| #else |
| LIR_Opr tmp = new_pointer_register(); |
| if (TwoOperandLIRForm) { |
| __ move(addr, tmp); |
| __ unsigned_shift_right(tmp, CardTableModRefBS::card_shift, tmp); |
| } else { |
| __ unsigned_shift_right(addr, CardTableModRefBS::card_shift, tmp); |
| } |
| |
| LIR_Address* card_addr; |
| if (can_inline_as_constant(card_table_base)) { |
| card_addr = new LIR_Address(tmp, card_table_base->as_jint(), T_BYTE); |
| } else { |
| card_addr = new LIR_Address(tmp, load_constant(card_table_base), T_BYTE); |
| } |
| |
| LIR_Opr dirty = LIR_OprFact::intConst(CardTableModRefBS::dirty_card_val()); |
| if (UseCondCardMark) { |
| LIR_Opr cur_value = new_register(T_INT); |
| if (UseConcMarkSweepGC) { |
| __ membar_storeload(); |
| } |
| __ move(card_addr, cur_value); |
| |
| LabelObj* L_already_dirty = new LabelObj(); |
| __ cmp(lir_cond_equal, cur_value, dirty); |
| __ branch(lir_cond_equal, T_BYTE, L_already_dirty->label()); |
| __ move(dirty, card_addr); |
| __ branch_destination(L_already_dirty->label()); |
| } else { |
| __ move(dirty, card_addr); |
| } |
| #endif |
| } |
| |
| |
| //------------------------field access-------------------------------------- |
| |
| // Comment copied form templateTable_i486.cpp |
| // ---------------------------------------------------------------------------- |
| // Volatile variables demand their effects be made known to all CPU's in |
| // order. Store buffers on most chips allow reads & writes to reorder; the |
| // JMM's ReadAfterWrite.java test fails in -Xint mode without some kind of |
| // memory barrier (i.e., it's not sufficient that the interpreter does not |
| // reorder volatile references, the hardware also must not reorder them). |
| // |
| // According to the new Java Memory Model (JMM): |
| // (1) All volatiles are serialized wrt to each other. |
| // ALSO reads & writes act as aquire & release, so: |
| // (2) A read cannot let unrelated NON-volatile memory refs that happen after |
| // the read float up to before the read. It's OK for non-volatile memory refs |
| // that happen before the volatile read to float down below it. |
| // (3) Similar a volatile write cannot let unrelated NON-volatile memory refs |
| // that happen BEFORE the write float down to after the write. It's OK for |
| // non-volatile memory refs that happen after the volatile write to float up |
| // before it. |
| // |
| // We only put in barriers around volatile refs (they are expensive), not |
| // _between_ memory refs (that would require us to track the flavor of the |
| // previous memory refs). Requirements (2) and (3) require some barriers |
| // before volatile stores and after volatile loads. These nearly cover |
| // requirement (1) but miss the volatile-store-volatile-load case. This final |
| // case is placed after volatile-stores although it could just as well go |
| // before volatile-loads. |
| |
| |
| void LIRGenerator::do_StoreField(StoreField* x) { |
| bool needs_patching = x->needs_patching(); |
| bool is_volatile = x->field()->is_volatile(); |
| BasicType field_type = x->field_type(); |
| bool is_oop = (field_type == T_ARRAY || field_type == T_OBJECT); |
| |
| CodeEmitInfo* info = NULL; |
| if (needs_patching) { |
| assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); |
| info = state_for(x, x->state_before()); |
| } else if (x->needs_null_check()) { |
| NullCheck* nc = x->explicit_null_check(); |
| if (nc == NULL) { |
| info = state_for(x); |
| } else { |
| info = state_for(nc); |
| } |
| } |
| |
| |
| LIRItem object(x->obj(), this); |
| LIRItem value(x->value(), this); |
| |
| object.load_item(); |
| |
| if (is_volatile || needs_patching) { |
| // load item if field is volatile (fewer special cases for volatiles) |
| // load item if field not initialized |
| // load item if field not constant |
| // because of code patching we cannot inline constants |
| if (field_type == T_BYTE || field_type == T_BOOLEAN) { |
| value.load_byte_item(); |
| } else { |
| value.load_item(); |
| } |
| } else { |
| value.load_for_store(field_type); |
| } |
| |
| set_no_result(x); |
| |
| #ifndef PRODUCT |
| if (PrintNotLoaded && needs_patching) { |
| tty->print_cr(" ###class not loaded at store_%s bci %d", |
| x->is_static() ? "static" : "field", x->printable_bci()); |
| } |
| #endif |
| |
| if (x->needs_null_check() && |
| (needs_patching || |
| MacroAssembler::needs_explicit_null_check(x->offset()))) { |
| // emit an explicit null check because the offset is too large |
| __ null_check(object.result(), new CodeEmitInfo(info)); |
| } |
| |
| LIR_Address* address; |
| if (needs_patching) { |
| // we need to patch the offset in the instruction so don't allow |
| // generate_address to try to be smart about emitting the -1. |
| // Otherwise the patching code won't know how to find the |
| // instruction to patch. |
| address = new LIR_Address(object.result(), PATCHED_ADDR, field_type); |
| } else { |
| address = generate_address(object.result(), x->offset(), field_type); |
| } |
| |
| if (is_volatile && os::is_MP()) { |
| __ membar_release(); |
| } |
| |
| if (is_oop) { |
| // Do the pre-write barrier, if any. |
| pre_barrier(LIR_OprFact::address(address), |
| LIR_OprFact::illegalOpr /* pre_val */, |
| true /* do_load*/, |
| needs_patching, |
| (info ? new CodeEmitInfo(info) : NULL)); |
| } |
| |
| bool needs_atomic_access = is_volatile || AlwaysAtomicAccesses; |
| if (needs_atomic_access && !needs_patching) { |
| volatile_field_store(value.result(), address, info); |
| } else { |
| LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none; |
| __ store(value.result(), address, info, patch_code); |
| } |
| |
| if (is_oop) { |
| // Store to object so mark the card of the header |
| post_barrier(object.result(), value.result()); |
| } |
| |
| if (is_volatile && os::is_MP()) { |
| __ membar(); |
| } |
| } |
| |
| |
| void LIRGenerator::do_LoadField(LoadField* x) { |
| bool needs_patching = x->needs_patching(); |
| bool is_volatile = x->field()->is_volatile(); |
| BasicType field_type = x->field_type(); |
| |
| CodeEmitInfo* info = NULL; |
| if (needs_patching) { |
| assert(x->explicit_null_check() == NULL, "can't fold null check into patching field access"); |
| info = state_for(x, x->state_before()); |
| } else if (x->needs_null_check()) { |
| NullCheck* nc = x->explicit_null_check(); |
| if (nc == NULL) { |
| info = state_for(x); |
| } else { |
| info = state_for(nc); |
| } |
| } |
| |
| LIRItem object(x->obj(), this); |
| |
| object.load_item(); |
| |
| #ifndef PRODUCT |
| if (PrintNotLoaded && needs_patching) { |
| tty->print_cr(" ###class not loaded at load_%s bci %d", |
| x->is_static() ? "static" : "field", x->printable_bci()); |
| } |
| #endif |
| |
| bool stress_deopt = StressLoopInvariantCodeMotion && info && info->deoptimize_on_exception(); |
| if (x->needs_null_check() && |
| (needs_patching || |
| MacroAssembler::needs_explicit_null_check(x->offset()) || |
| stress_deopt)) { |
| LIR_Opr obj = object.result(); |
| if (stress_deopt) { |
| obj = new_register(T_OBJECT); |
| __ move(LIR_OprFact::oopConst(NULL), obj); |
| } |
| // emit an explicit null check because the offset is too large |
| __ null_check(obj, new CodeEmitInfo(info)); |
| } |
| |
| LIR_Opr reg = rlock_result(x, field_type); |
| LIR_Address* address; |
| if (needs_patching) { |
| // we need to patch the offset in the instruction so don't allow |
| // generate_address to try to be smart about emitting the -1. |
| // Otherwise the patching code won't know how to find the |
| // instruction to patch. |
| address = new LIR_Address(object.result(), PATCHED_ADDR, field_type); |
| } else { |
| address = generate_address(object.result(), x->offset(), field_type); |
| } |
| |
| bool needs_atomic_access = is_volatile || AlwaysAtomicAccesses; |
| if (needs_atomic_access && !needs_patching) { |
| volatile_field_load(address, reg, info); |
| } else { |
| LIR_PatchCode patch_code = needs_patching ? lir_patch_normal : lir_patch_none; |
| __ load(address, reg, info, patch_code); |
| } |
| |
| if (is_volatile && os::is_MP()) { |
| __ membar_acquire(); |
| } |
| } |
| |
| |
| //------------------------java.nio.Buffer.checkIndex------------------------ |
| |
| // int java.nio.Buffer.checkIndex(int) |
| void LIRGenerator::do_NIOCheckIndex(Intrinsic* x) { |
| // NOTE: by the time we are in checkIndex() we are guaranteed that |
| // the buffer is non-null (because checkIndex is package-private and |
| // only called from within other methods in the buffer). |
| assert(x->number_of_arguments() == 2, "wrong type"); |
| LIRItem buf (x->argument_at(0), this); |
| LIRItem index(x->argument_at(1), this); |
| buf.load_item(); |
| index.load_item(); |
| |
| LIR_Opr result = rlock_result(x); |
| if (GenerateRangeChecks) { |
| CodeEmitInfo* info = state_for(x); |
| CodeStub* stub = new RangeCheckStub(info, index.result(), true); |
| if (index.result()->is_constant()) { |
| cmp_mem_int(lir_cond_belowEqual, buf.result(), java_nio_Buffer::limit_offset(), index.result()->as_jint(), info); |
| __ branch(lir_cond_belowEqual, T_INT, stub); |
| } else { |
| cmp_reg_mem(lir_cond_aboveEqual, index.result(), buf.result(), |
| java_nio_Buffer::limit_offset(), T_INT, info); |
| __ branch(lir_cond_aboveEqual, T_INT, stub); |
| } |
| __ move(index.result(), result); |
| } else { |
| // Just load the index into the result register |
| __ move(index.result(), result); |
| } |
| } |
| |
| |
| //------------------------array access-------------------------------------- |
| |
| |
| void LIRGenerator::do_ArrayLength(ArrayLength* x) { |
| LIRItem array(x->array(), this); |
| array.load_item(); |
| LIR_Opr reg = rlock_result(x); |
| |
| CodeEmitInfo* info = NULL; |
| if (x->needs_null_check()) { |
| NullCheck* nc = x->explicit_null_check(); |
| if (nc == NULL) { |
| info = state_for(x); |
| } else { |
| info = state_for(nc); |
| } |
| if (StressLoopInvariantCodeMotion && info->deoptimize_on_exception()) { |
| LIR_Opr obj = new_register(T_OBJECT); |
| __ move(LIR_OprFact::oopConst(NULL), obj); |
| __ null_check(obj, new CodeEmitInfo(info)); |
| } |
| } |
| __ load(new LIR_Address(array.result(), arrayOopDesc::length_offset_in_bytes(), T_INT), reg, info, lir_patch_none); |
| } |
| |
| |
| void LIRGenerator::do_LoadIndexed(LoadIndexed* x) { |
| bool use_length = x->length() != NULL; |
| LIRItem array(x->array(), this); |
| LIRItem index(x->index(), this); |
| LIRItem length(this); |
| bool needs_range_check = x->compute_needs_range_check(); |
| |
| if (use_length && needs_range_check) { |
| length.set_instruction(x->length()); |
| length.load_item(); |
| } |
| |
| array.load_item(); |
| if (index.is_constant() && can_inline_as_constant(x->index())) { |
| // let it be a constant |
| index.dont_load_item(); |
| } else { |
| index.load_item(); |
| } |
| |
| CodeEmitInfo* range_check_info = state_for(x); |
| CodeEmitInfo* null_check_info = NULL; |
| if (x->needs_null_check()) { |
| NullCheck* nc = x->explicit_null_check(); |
| if (nc != NULL) { |
| null_check_info = state_for(nc); |
| } else { |
| null_check_info = range_check_info; |
| } |
| if (StressLoopInvariantCodeMotion && null_check_info->deoptimize_on_exception()) { |
| LIR_Opr obj = new_register(T_OBJECT); |
| __ move(LIR_OprFact::oopConst(NULL), obj); |
| __ null_check(obj, new CodeEmitInfo(null_check_info)); |
| } |
| } |
| |
| // emit array address setup early so it schedules better |
| LIR_Address* array_addr = emit_array_address(array.result(), index.result(), x->elt_type(), false); |
| |
| if (GenerateRangeChecks && needs_range_check) { |
| if (StressLoopInvariantCodeMotion && range_check_info->deoptimize_on_exception()) { |
| __ branch(lir_cond_always, T_ILLEGAL, new RangeCheckStub(range_check_info, index.result())); |
| } else if (use_length) { |
| // TODO: use a (modified) version of array_range_check that does not require a |
| // constant length to be loaded to a register |
| __ cmp(lir_cond_belowEqual, length.result(), index.result()); |
| __ branch(lir_cond_belowEqual, T_INT, new RangeCheckStub(range_check_info, index.result())); |
| } else { |
| array_range_check(array.result(), index.result(), null_check_info, range_check_info); |
| // The range check performs the null check, so clear it out for the load |
| null_check_info = NULL; |
| } |
| } |
| |
| __ move(array_addr, rlock_result(x, x->elt_type()), null_check_info); |
| } |
| |
| |
| void LIRGenerator::do_NullCheck(NullCheck* x) { |
| if (x->can_trap()) { |
| LIRItem value(x->obj(), this); |
| value.load_item(); |
| CodeEmitInfo* info = state_for(x); |
| __ null_check(value.result(), info); |
| } |
| } |
| |
| |
| void LIRGenerator::do_TypeCast(TypeCast* x) { |
| LIRItem value(x->obj(), this); |
| value.load_item(); |
| // the result is the same as from the node we are casting |
| set_result(x, value.result()); |
| } |
| |
| |
| void LIRGenerator::do_Throw(Throw* x) { |
| LIRItem exception(x->exception(), this); |
| exception.load_item(); |
| set_no_result(x); |
| LIR_Opr exception_opr = exception.result(); |
| CodeEmitInfo* info = state_for(x, x->state()); |
| |
| #ifndef PRODUCT |
| if (PrintC1Statistics) { |
| increment_counter(Runtime1::throw_count_address(), T_INT); |
| } |
| #endif |
| |
| // check if the instruction has an xhandler in any of the nested scopes |
| bool unwind = false; |
| if (info->exception_handlers()->length() == 0) { |
| // this throw is not inside an xhandler |
| unwind = true; |
| } else { |
| // get some idea of the throw type |
| bool type_is_exact = true; |
| ciType* throw_type = x->exception()->exact_type(); |
| if (throw_type == NULL) { |
| type_is_exact = false; |
| throw_type = x->exception()->declared_type(); |
| } |
| if (throw_type != NULL && throw_type->is_instance_klass()) { |
| ciInstanceKlass* throw_klass = (ciInstanceKlass*)throw_type; |
| unwind = !x->exception_handlers()->could_catch(throw_klass, type_is_exact); |
| } |
| } |
| |
| // do null check before moving exception oop into fixed register |
| // to avoid a fixed interval with an oop during the null check. |
| // Use a copy of the CodeEmitInfo because debug information is |
| // different for null_check and throw. |
| if (GenerateCompilerNullChecks && |
| (x->exception()->as_NewInstance() == NULL && x->exception()->as_ExceptionObject() == NULL)) { |
| // if the exception object wasn't created using new then it might be null. |
| __ null_check(exception_opr, new CodeEmitInfo(info, x->state()->copy(ValueStack::ExceptionState, x->state()->bci()))); |
| } |
| |
| if (compilation()->env()->jvmti_can_post_on_exceptions()) { |
| // we need to go through the exception lookup path to get JVMTI |
| // notification done |
| unwind = false; |
| } |
| |
| // move exception oop into fixed register |
| __ move(exception_opr, exceptionOopOpr()); |
| |
| if (unwind) { |
| __ unwind_exception(exceptionOopOpr()); |
| } else { |
| __ throw_exception(exceptionPcOpr(), exceptionOopOpr(), info); |
| } |
| } |
| |
| |
| void LIRGenerator::do_RoundFP(RoundFP* x) { |
| LIRItem input(x->input(), this); |
| input.load_item(); |
| LIR_Opr input_opr = input.result(); |
| assert(input_opr->is_register(), "why round if value is not in a register?"); |
| assert(input_opr->is_single_fpu() || input_opr->is_double_fpu(), "input should be floating-point value"); |
| if (input_opr->is_single_fpu()) { |
| set_result(x, round_item(input_opr)); // This code path not currently taken |
| } else { |
| LIR_Opr result = new_register(T_DOUBLE); |
| set_vreg_flag(result, must_start_in_memory); |
| __ roundfp(input_opr, LIR_OprFact::illegalOpr, result); |
| set_result(x, result); |
| } |
| } |
| |
| // Here UnsafeGetRaw may have x->base() and x->index() be int or long |
| // on both 64 and 32 bits. Expecting x->base() to be always long on 64bit. |
| void LIRGenerator::do_UnsafeGetRaw(UnsafeGetRaw* x) { |
| LIRItem base(x->base(), this); |
| LIRItem idx(this); |
| |
| base.load_item(); |
| if (x->has_index()) { |
| idx.set_instruction(x->index()); |
| idx.load_nonconstant(); |
| } |
| |
| LIR_Opr reg = rlock_result(x, x->basic_type()); |
| |
| int log2_scale = 0; |
| if (x->has_index()) { |
| log2_scale = x->log2_scale(); |
| } |
| |
| assert(!x->has_index() || idx.value() == x->index(), "should match"); |
| |
| LIR_Opr base_op = base.result(); |
| LIR_Opr index_op = idx.result(); |
| #ifndef _LP64 |
| if (base_op->type() == T_LONG) { |
| base_op = new_register(T_INT); |
| __ convert(Bytecodes::_l2i, base.result(), base_op); |
| } |
| if (x->has_index()) { |
| if (index_op->type() == T_LONG) { |
| LIR_Opr long_index_op = index_op; |
| if (index_op->is_constant()) { |
| long_index_op = new_register(T_LONG); |
| __ move(index_op, long_index_op); |
| } |
| index_op = new_register(T_INT); |
| __ convert(Bytecodes::_l2i, long_index_op, index_op); |
| } else { |
| assert(x->index()->type()->tag() == intTag, "must be"); |
| } |
| } |
| // At this point base and index should be all ints. |
| assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int"); |
| assert(!x->has_index() || index_op->type() == T_INT, "index should be an int"); |
| #else |
| if (x->has_index()) { |
| if (index_op->type() == T_INT) { |
| if (!index_op->is_constant()) { |
| index_op = new_register(T_LONG); |
| __ convert(Bytecodes::_i2l, idx.result(), index_op); |
| } |
| } else { |
| assert(index_op->type() == T_LONG, "must be"); |
| if (index_op->is_constant()) { |
| index_op = new_register(T_LONG); |
| __ move(idx.result(), index_op); |
| } |
| } |
| } |
| // At this point base is a long non-constant |
| // Index is a long register or a int constant. |
| // We allow the constant to stay an int because that would allow us a more compact encoding by |
| // embedding an immediate offset in the address expression. If we have a long constant, we have to |
| // move it into a register first. |
| assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a long non-constant"); |
| assert(!x->has_index() || (index_op->type() == T_INT && index_op->is_constant()) || |
| (index_op->type() == T_LONG && !index_op->is_constant()), "unexpected index type"); |
| #endif |
| |
| BasicType dst_type = x->basic_type(); |
| |
| LIR_Address* addr; |
| if (index_op->is_constant()) { |
| assert(log2_scale == 0, "must not have a scale"); |
| assert(index_op->type() == T_INT, "only int constants supported"); |
| addr = new LIR_Address(base_op, index_op->as_jint(), dst_type); |
| } else { |
| #ifdef X86 |
| addr = new LIR_Address(base_op, index_op, LIR_Address::Scale(log2_scale), 0, dst_type); |
| #elif defined(GENERATE_ADDRESS_IS_PREFERRED) |
| addr = generate_address(base_op, index_op, log2_scale, 0, dst_type); |
| #else |
| if (index_op->is_illegal() || log2_scale == 0) { |
| addr = new LIR_Address(base_op, index_op, dst_type); |
| } else { |
| LIR_Opr tmp = new_pointer_register(); |
| __ shift_left(index_op, log2_scale, tmp); |
| addr = new LIR_Address(base_op, tmp, dst_type); |
| } |
| #endif |
| } |
| |
| if (x->may_be_unaligned() && (dst_type == T_LONG || dst_type == T_DOUBLE)) { |
| __ unaligned_move(addr, reg); |
| } else { |
| if (dst_type == T_OBJECT && x->is_wide()) { |
| __ move_wide(addr, reg); |
| } else { |
| __ move(addr, reg); |
| } |
| } |
| } |
| |
| |
| void LIRGenerator::do_UnsafePutRaw(UnsafePutRaw* x) { |
| int log2_scale = 0; |
| BasicType type = x->basic_type(); |
| |
| if (x->has_index()) { |
| log2_scale = x->log2_scale(); |
| } |
| |
| LIRItem base(x->base(), this); |
| LIRItem value(x->value(), this); |
| LIRItem idx(this); |
| |
| base.load_item(); |
| if (x->has_index()) { |
| idx.set_instruction(x->index()); |
| idx.load_item(); |
| } |
| |
| if (type == T_BYTE || type == T_BOOLEAN) { |
| value.load_byte_item(); |
| } else { |
| value.load_item(); |
| } |
| |
| set_no_result(x); |
| |
| LIR_Opr base_op = base.result(); |
| LIR_Opr index_op = idx.result(); |
| |
| #ifdef GENERATE_ADDRESS_IS_PREFERRED |
| LIR_Address* addr = generate_address(base_op, index_op, log2_scale, 0, x->basic_type()); |
| #else |
| #ifndef _LP64 |
| if (base_op->type() == T_LONG) { |
| base_op = new_register(T_INT); |
| __ convert(Bytecodes::_l2i, base.result(), base_op); |
| } |
| if (x->has_index()) { |
| if (index_op->type() == T_LONG) { |
| index_op = new_register(T_INT); |
| __ convert(Bytecodes::_l2i, idx.result(), index_op); |
| } |
| } |
| // At this point base and index should be all ints and not constants |
| assert(base_op->type() == T_INT && !base_op->is_constant(), "base should be an non-constant int"); |
| assert(!x->has_index() || (index_op->type() == T_INT && !index_op->is_constant()), "index should be an non-constant int"); |
| #else |
| if (x->has_index()) { |
| if (index_op->type() == T_INT) { |
| index_op = new_register(T_LONG); |
| __ convert(Bytecodes::_i2l, idx.result(), index_op); |
| } |
| } |
| // At this point base and index are long and non-constant |
| assert(base_op->type() == T_LONG && !base_op->is_constant(), "base must be a non-constant long"); |
| assert(!x->has_index() || (index_op->type() == T_LONG && !index_op->is_constant()), "index must be a non-constant long"); |
| #endif |
| |
| if (log2_scale != 0) { |
| // temporary fix (platform dependent code without shift on Intel would be better) |
| // TODO: ARM also allows embedded shift in the address |
| LIR_Opr tmp = new_pointer_register(); |
| if (TwoOperandLIRForm) { |
| __ move(index_op, tmp); |
| index_op = tmp; |
| } |
| __ shift_left(index_op, log2_scale, tmp); |
| if (!TwoOperandLIRForm) { |
| index_op = tmp; |
| } |
| } |
| |
| LIR_Address* addr = new LIR_Address(base_op, index_op, x->basic_type()); |
| #endif // !GENERATE_ADDRESS_IS_PREFERRED |
| __ move(value.result(), addr); |
| } |
| |
| |
| void LIRGenerator::do_UnsafeGetObject(UnsafeGetObject* x) { |
| BasicType type = x->basic_type(); |
| LIRItem src(x->object(), this); |
| LIRItem off(x->offset(), this); |
| |
| off.load_item(); |
| src.load_item(); |
| |
| LIR_Opr value = rlock_result(x, x->basic_type()); |
| |
| get_Object_unsafe(value, src.result(), off.result(), type, x->is_volatile()); |
| |
| #if INCLUDE_ALL_GCS |
| // We might be reading the value of the referent field of a |
| // Reference object in order to attach it back to the live |
| // object graph. If G1 is enabled then we need to record |
| // the value that is being returned in an SATB log buffer. |
| // |
| // We need to generate code similar to the following... |
| // |
| // if (offset == java_lang_ref_Reference::referent_offset) { |
| // if (src != NULL) { |
| // if (klass(src)->reference_type() != REF_NONE) { |
| // pre_barrier(..., value, ...); |
| // } |
| // } |
| // } |
| |
| if (UseG1GC && type == T_OBJECT) { |
| bool gen_pre_barrier = true; // Assume we need to generate pre_barrier. |
| bool gen_offset_check = true; // Assume we need to generate the offset guard. |
| bool gen_source_check = true; // Assume we need to check the src object for null. |
| bool gen_type_check = true; // Assume we need to check the reference_type. |
| |
| if (off.is_constant()) { |
| jlong off_con = (off.type()->is_int() ? |
| (jlong) off.get_jint_constant() : |
| off.get_jlong_constant()); |
| |
| |
| if (off_con != (jlong) java_lang_ref_Reference::referent_offset) { |
| // The constant offset is something other than referent_offset. |
| // We can skip generating/checking the remaining guards and |
| // skip generation of the code stub. |
| gen_pre_barrier = false; |
| } else { |
| // The constant offset is the same as referent_offset - |
| // we do not need to generate a runtime offset check. |
| gen_offset_check = false; |
| } |
| } |
| |
| // We don't need to generate stub if the source object is an array |
| if (gen_pre_barrier && src.type()->is_array()) { |
| gen_pre_barrier = false; |
| } |
| |
| if (gen_pre_barrier) { |
| // We still need to continue with the checks. |
| if (src.is_constant()) { |
| ciObject* src_con = src.get_jobject_constant(); |
| guarantee(src_con != NULL, "no source constant"); |
| |
| if (src_con->is_null_object()) { |
| // The constant src object is null - We can skip |
| // generating the code stub. |
| gen_pre_barrier = false; |
| } else { |
| // Non-null constant source object. We still have to generate |
| // the slow stub - but we don't need to generate the runtime |
| // null object check. |
| gen_source_check = false; |
| } |
| } |
| } |
| if (gen_pre_barrier && !PatchALot) { |
| // Can the klass of object be statically determined to be |
| // a sub-class of Reference? |
| ciType* type = src.value()->declared_type(); |
| if ((type != NULL) && type->is_loaded()) { |
| if (type->is_subtype_of(compilation()->env()->Reference_klass())) { |
| gen_type_check = false; |
| } else if (type->is_klass() && |
| !compilation()->env()->Object_klass()->is_subtype_of(type->as_klass())) { |
| // Not Reference and not Object klass. |
| gen_pre_barrier = false; |
| } |
| } |
| } |
| |
| if (gen_pre_barrier) { |
| LabelObj* Lcont = new LabelObj(); |
| |
| // We can have generate one runtime check here. Let's start with |
| // the offset check. |
| if (gen_offset_check) { |
| // if (offset != referent_offset) -> continue |
| // If offset is an int then we can do the comparison with the |
| // referent_offset constant; otherwise we need to move |
| // referent_offset into a temporary register and generate |
| // a reg-reg compare. |
| |
| LIR_Opr referent_off; |
| |
| if (off.type()->is_int()) { |
| referent_off = LIR_OprFact::intConst(java_lang_ref_Reference::referent_offset); |
| } else { |
| assert(off.type()->is_long(), "what else?"); |
| referent_off = new_register(T_LONG); |
| __ move(LIR_OprFact::longConst(java_lang_ref_Reference::referent_offset), referent_off); |
| } |
| __ cmp(lir_cond_notEqual, off.result(), referent_off); |
| __ branch(lir_cond_notEqual, as_BasicType(off.type()), Lcont->label()); |
| } |
| if (gen_source_check) { |
| // offset is a const and equals referent offset |
| // if (source == null) -> continue |
| __ cmp(lir_cond_equal, src.result(), LIR_OprFact::oopConst(NULL)); |
| __ branch(lir_cond_equal, T_OBJECT, Lcont->label()); |
| } |
| LIR_Opr src_klass = new_register(T_OBJECT); |
| if (gen_type_check) { |
| // We have determined that offset == referent_offset && src != null. |
| // if (src->_klass->_reference_type == REF_NONE) -> continue |
| __ move(new LIR_Address(src.result(), oopDesc::klass_offset_in_bytes(), T_ADDRESS), src_klass); |
| LIR_Address* reference_type_addr = new LIR_Address(src_klass, in_bytes(InstanceKlass::reference_type_offset()), T_BYTE); |
| LIR_Opr reference_type = new_register(T_INT); |
| __ move(reference_type_addr, reference_type); |
| __ cmp(lir_cond_equal, reference_type, LIR_OprFact::intConst(REF_NONE)); |
| __ branch(lir_cond_equal, T_INT, Lcont->label()); |
| } |
| { |
| // We have determined that src->_klass->_reference_type != REF_NONE |
| // so register the value in the referent field with the pre-barrier. |
| pre_barrier(LIR_OprFact::illegalOpr /* addr_opr */, |
| value /* pre_val */, |
| false /* do_load */, |
| false /* patch */, |
| NULL /* info */); |
| } |
| __ branch_destination(Lcont->label()); |
| } |
| } |
| #endif // INCLUDE_ALL_GCS |
| |
| if (x->is_volatile() && os::is_MP()) __ membar_acquire(); |
| } |
| |
| |
| void LIRGenerator::do_UnsafePutObject(UnsafePutObject* x) { |
| BasicType type = x->basic_type(); |
| LIRItem src(x->object(), this); |
| LIRItem off(x->offset(), this); |
| LIRItem data(x->value(), this); |
| |
| src.load_item(); |
| if (type == T_BOOLEAN || type == T_BYTE) { |
| data.load_byte_item(); |
| } else { |
| data.load_item(); |
| } |
| off.load_item(); |
| |
| set_no_result(x); |
| |
| if (x->is_volatile() && os::is_MP()) __ membar_release(); |
| put_Object_unsafe(src.result(), off.result(), data.result(), type, x->is_volatile()); |
| if (x->is_volatile() && os::is_MP()) __ membar(); |
| } |
| |
| |
| void LIRGenerator::do_SwitchRanges(SwitchRangeArray* x, LIR_Opr value, BlockBegin* default_sux) { |
| int lng = x->length(); |
| |
| for (int i = 0; i < lng; i++) { |
| SwitchRange* one_range = x->at(i); |
| int low_key = one_range->low_key(); |
| int high_key = one_range->high_key(); |
| BlockBegin* dest = one_range->sux(); |
| if (low_key == high_key) { |
| __ cmp(lir_cond_equal, value, low_key); |
| __ branch(lir_cond_equal, T_INT, dest); |
| } else if (high_key - low_key == 1) { |
| __ cmp(lir_cond_equal, value, low_key); |
| __ branch(lir_cond_equal, T_INT, dest); |
| __ cmp(lir_cond_equal, value, high_key); |
| __ branch(lir_cond_equal, T_INT, dest); |
| } else { |
| LabelObj* L = new LabelObj(); |
| __ cmp(lir_cond_less, value, low_key); |
| __ branch(lir_cond_less, T_INT, L->label()); |
| __ cmp(lir_cond_lessEqual, value, high_key); |
| __ branch(lir_cond_lessEqual, T_INT, dest); |
| __ branch_destination(L->label()); |
| } |
| } |
| __ jump(default_sux); |
| } |
| |
| |
| SwitchRangeArray* LIRGenerator::create_lookup_ranges(TableSwitch* x) { |
| SwitchRangeList* res = new SwitchRangeList(); |
| int len = x->length(); |
| if (len > 0) { |
| BlockBegin* sux = x->sux_at(0); |
| int key = x->lo_key(); |
| BlockBegin* default_sux = x->default_sux(); |
| SwitchRange* range = new SwitchRange(key, sux); |
| for (int i = 0; i < len; i++, key++) { |
| BlockBegin* new_sux = x->sux_at(i); |
| if (sux == new_sux) { |
| // still in same range |
| range->set_high_key(key); |
| } else { |
| // skip tests which explicitly dispatch to the default |
| if (sux != default_sux) { |
| res->append(range); |
| } |
| range = new SwitchRange(key, new_sux); |
| } |
| sux = new_sux; |
| } |
| if (res->length() == 0 || res->last() != range) res->append(range); |
| } |
| return res; |
| } |
| |
| |
| // we expect the keys to be sorted by increasing value |
| SwitchRangeArray* LIRGenerator::create_lookup_ranges(LookupSwitch* x) { |
| SwitchRangeList* res = new SwitchRangeList(); |
| int len = x->length(); |
| if (len > 0) { |
| BlockBegin* default_sux = x->default_sux(); |
| int key = x->key_at(0); |
| BlockBegin* sux = x->sux_at(0); |
| SwitchRange* range = new SwitchRange(key, sux); |
| for (int i = 1; i < len; i++) { |
| int new_key = x->key_at(i); |
| BlockBegin* new_sux = x->sux_at(i); |
| if (key+1 == new_key && sux == new_sux) { |
| // still in same range |
| range->set_high_key(new_key); |
| } else { |
| // skip tests which explicitly dispatch to the default |
| if (range->sux() != default_sux) { |
| res->append(range); |
| } |
| range = new SwitchRange(new_key, new_sux); |
| } |
| key = new_key; |
| sux = new_sux; |
| } |
| if (res->length() == 0 || res->last() != range) res->append(range); |
| } |
| return res; |
| } |
| |
| |
| void LIRGenerator::do_TableSwitch(TableSwitch* x) { |
| LIRItem tag(x->tag(), this); |
| tag.load_item(); |
| set_no_result(x); |
| |
| if (x->is_safepoint()) { |
| __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); |
| } |
| |
| // move values into phi locations |
| move_to_phi(x->state()); |
| |
| int lo_key = x->lo_key(); |
| int hi_key = x->hi_key(); |
| int len = x->length(); |
| LIR_Opr value = tag.result(); |
| if (UseTableRanges) { |
| do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); |
| } else { |
| for (int i = 0; i < len; i++) { |
| __ cmp(lir_cond_equal, value, i + lo_key); |
| __ branch(lir_cond_equal, T_INT, x->sux_at(i)); |
| } |
| __ jump(x->default_sux()); |
| } |
| } |
| |
| |
| void LIRGenerator::do_LookupSwitch(LookupSwitch* x) { |
| LIRItem tag(x->tag(), this); |
| tag.load_item(); |
| set_no_result(x); |
| |
| if (x->is_safepoint()) { |
| __ safepoint(safepoint_poll_register(), state_for(x, x->state_before())); |
| } |
| |
| // move values into phi locations |
| move_to_phi(x->state()); |
| |
| LIR_Opr value = tag.result(); |
| if (UseTableRanges) { |
| do_SwitchRanges(create_lookup_ranges(x), value, x->default_sux()); |
| } else { |
| int len = x->length(); |
| for (int i = 0; i < len; i++) { |
| __ cmp(lir_cond_equal, value, x->key_at(i)); |
| __ branch(lir_cond_equal, T_INT, x->sux_at(i)); |
| } |
| __ jump(x->default_sux()); |
| } |
| } |
| |
| |
| void LIRGenerator::do_Goto(Goto* x) { |
| set_no_result(x); |
| |
| if (block()->next()->as_OsrEntry()) { |
| // need to free up storage used for OSR entry point |
| LIR_Opr osrBuffer = block()->next()->operand(); |
| BasicTypeList signature; |
| signature.append(NOT_LP64(T_INT) LP64_ONLY(T_LONG)); // pass a pointer to osrBuffer |
| CallingConvention* cc = frame_map()->c_calling_convention(&signature); |
| __ move(osrBuffer, cc->args()->at(0)); |
| __ call_runtime_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::OSR_migration_end), |
| getThreadTemp(), LIR_OprFact::illegalOpr, cc->args()); |
| } |
| |
| if (x->is_safepoint()) { |
| ValueStack* state = x->state_before() ? x->state_before() : x->state(); |
| |
| // increment backedge counter if needed |
| CodeEmitInfo* info = state_for(x, state); |
| increment_backedge_counter(info, x->profiled_bci()); |
| CodeEmitInfo* safepoint_info = state_for(x, state); |
| __ safepoint(safepoint_poll_register(), safepoint_info); |
| } |
| |
| // Gotos can be folded Ifs, handle this case. |
| if (x->should_profile()) { |
| ciMethod* method = x->profiled_method(); |
| assert(method != NULL, "method should be set if branch is profiled"); |
| ciMethodData* md = method->method_data_or_null(); |
| assert(md != NULL, "Sanity"); |
| ciProfileData* data = md->bci_to_data(x->profiled_bci()); |
| assert(data != NULL, "must have profiling data"); |
| int offset; |
| if (x->direction() == Goto::taken) { |
| assert(data->is_BranchData(), "need BranchData for two-way branches"); |
| offset = md->byte_offset_of_slot(data, BranchData::taken_offset()); |
| } else if (x->direction() == Goto::not_taken) { |
| assert(data->is_BranchData(), "need BranchData for two-way branches"); |
| offset = md->byte_offset_of_slot(data, BranchData::not_taken_offset()); |
| } else { |
| assert(data->is_JumpData(), "need JumpData for branches"); |
| offset = md->byte_offset_of_slot(data, JumpData::taken_offset()); |
| } |
| LIR_Opr md_reg = new_register(T_METADATA); |
| __ metadata2reg(md->constant_encoding(), md_reg); |
| |
| increment_counter(new LIR_Address(md_reg, offset, |
| NOT_LP64(T_INT) LP64_ONLY(T_LONG)), DataLayout::counter_increment); |
| } |
| |
| // emit phi-instruction move after safepoint since this simplifies |
| // describing the state as the safepoint. |
| move_to_phi(x->state()); |
| |
| __ jump(x->default_sux()); |
| } |
| |
| /** |
| * Emit profiling code if needed for arguments, parameters, return value types |
| * |
| * @param md MDO the code will update at runtime |
| * @param md_base_offset common offset in the MDO for this profile and subsequent ones |
| * @param md_offset offset in the MDO (on top of md_base_offset) for this profile |
| * @param profiled_k current profile |
| * @param obj IR node for the object to be profiled |
| * @param mdp register to hold the pointer inside the MDO (md + md_base_offset). |
| * Set once we find an update to make and use for next ones. |
| * @param not_null true if we know obj cannot be null |
| * @param signature_at_call_k signature at call for obj |
| * @param callee_signature_k signature of callee for obj |
| * at call and callee signatures differ at method handle call |
| * @return the only klass we know will ever be seen at this profile point |
| */ |
| ciKlass* LIRGenerator::profile_type(ciMethodData* md, int md_base_offset, int md_offset, intptr_t profiled_k, |
| Value obj, LIR_Opr& mdp, bool not_null, ciKlass* signature_at_call_k, |
| ciKlass* callee_signature_k) { |
| ciKlass* result = NULL; |
| bool do_null = !not_null && !TypeEntries::was_null_seen(profiled_k); |
| bool do_update = !TypeEntries::is_type_unknown(profiled_k); |
| // known not to be null or null bit already set and already set to |
| // unknown: nothing we can do to improve profiling |
| if (!do_null && !do_update) { |
| return result; |
| } |
| |
| ciKlass* exact_klass = NULL; |
| Compilation* comp = Compilation::current(); |
| if (do_update) { |
| // try to find exact type, using CHA if possible, so that loading |
| // the klass from the object can be avoided |
| ciType* type = obj->exact_type(); |
| if (type == NULL) { |
| type = obj->declared_type(); |
| type = comp->cha_exact_type(type); |
| } |
| assert(type == NULL || type->is_klass(), "type should be class"); |
| exact_klass = (type != NULL && type->is_loaded()) ? (ciKlass*)type : NULL; |
| |
| do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass; |
| } |
| |
| if (!do_null && !do_update) { |
| return result; |
| } |
| |
| ciKlass* exact_signature_k = NULL; |
| if (do_update) { |
| // Is the type from the signature exact (the only one possible)? |
| exact_signature_k = signature_at_call_k->exact_klass(); |
| if (exact_signature_k == NULL) { |
| exact_signature_k = comp->cha_exact_type(signature_at_call_k); |
| } else { |
| result = exact_signature_k; |
| // Known statically. No need to emit any code: prevent |
| // LIR_Assembler::emit_profile_type() from emitting useless code |
| profiled_k = ciTypeEntries::with_status(result, profiled_k); |
| } |
| // exact_klass and exact_signature_k can be both non NULL but |
| // different if exact_klass is loaded after the ciObject for |
| // exact_signature_k is created. |
| if (exact_klass == NULL && exact_signature_k != NULL && exact_klass != exact_signature_k) { |
| // sometimes the type of the signature is better than the best type |
| // the compiler has |
| exact_klass = exact_signature_k; |
| } |
| if (callee_signature_k != NULL && |
| callee_signature_k != signature_at_call_k) { |
| ciKlass* improved_klass = callee_signature_k->exact_klass(); |
| if (improved_klass == NULL) { |
| improved_klass = comp->cha_exact_type(callee_signature_k); |
| } |
| if (exact_klass == NULL && improved_klass != NULL && exact_klass != improved_klass) { |
| exact_klass = exact_signature_k; |
| } |
| } |
| do_update = exact_klass == NULL || ciTypeEntries::valid_ciklass(profiled_k) != exact_klass; |
| } |
| |
| if (!do_null && !do_update) { |
| return result; |
| } |
| |
| if (mdp == LIR_OprFact::illegalOpr) { |
| mdp = new_register(T_METADATA); |
| __ metadata2reg(md->constant_encoding(), mdp); |
| if (md_base_offset != 0) { |
| LIR_Address* base_type_address = new LIR_Address(mdp, md_base_offset, T_ADDRESS); |
| mdp = new_pointer_register(); |
| __ leal(LIR_OprFact::address(base_type_address), mdp); |
| } |
| } |
| LIRItem value(obj, this); |
| value.load_item(); |
| __ profile_type(new LIR_Address(mdp, md_offset, T_METADATA), |
| value.result(), exact_klass, profiled_k, new_pointer_register(), not_null, exact_signature_k != NULL); |
| return result; |
| } |
| |
| // profile parameters on entry to the root of the compilation |
| void LIRGenerator::profile_parameters(Base* x) { |
| if (compilation()->profile_parameters()) { |
| CallingConvention* args = compilation()->frame_map()->incoming_arguments(); |
| ciMethodData* md = scope()->method()->method_data_or_null(); |
| assert(md != NULL, "Sanity"); |
| |
| if (md->parameters_type_data() != NULL) { |
| ciParametersTypeData* parameters_type_data = md->parameters_type_data(); |
| ciTypeStackSlotEntries* parameters = parameters_type_data->parameters(); |
| LIR_Opr mdp = LIR_OprFact::illegalOpr; |
| for (int java_index = 0, i = 0, j = 0; j < parameters_type_data->number_of_parameters(); i++) { |
| LIR_Opr src = args->at(i); |
| assert(!src->is_illegal(), "check"); |
| BasicType t = src->type(); |
| if (t == T_OBJECT || t == T_ARRAY) { |
| intptr_t profiled_k = parameters->type(j); |
| Local* local = x->state()->local_at(java_index)->as_Local(); |
| ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)), |
| in_bytes(ParametersTypeData::type_offset(j)) - in_bytes(ParametersTypeData::type_offset(0)), |
| profiled_k, local, mdp, false, local->declared_type()->as_klass(), NULL); |
| // If the profile is known statically set it once for all and do not emit any code |
| if (exact != NULL) { |
| md->set_parameter_type(j, exact); |
| } |
| j++; |
| } |
| java_index += type2size[t]; |
| } |
| } |
| } |
| } |
| |
| void LIRGenerator::do_Base(Base* x) { |
| __ std_entry(LIR_OprFact::illegalOpr); |
| // Emit moves from physical registers / stack slots to virtual registers |
| CallingConvention* args = compilation()->frame_map()->incoming_arguments(); |
| IRScope* irScope = compilation()->hir()->top_scope(); |
| int java_index = 0; |
| for (int i = 0; i < args->length(); i++) { |
| LIR_Opr src = args->at(i); |
| assert(!src->is_illegal(), "check"); |
| BasicType t = src->type(); |
| |
| // Types which are smaller than int are passed as int, so |
| // correct the type which passed. |
| switch (t) { |
| case T_BYTE: |
| case T_BOOLEAN: |
| case T_SHORT: |
| case T_CHAR: |
| t = T_INT; |
| break; |
| } |
| |
| LIR_Opr dest = new_register(t); |
| __ move(src, dest); |
| |
| // Assign new location to Local instruction for this local |
| Local* local = x->state()->local_at(java_index)->as_Local(); |
| assert(local != NULL, "Locals for incoming arguments must have been created"); |
| #ifndef __SOFTFP__ |
| // The java calling convention passes double as long and float as int. |
| assert(as_ValueType(t)->tag() == local->type()->tag(), "check"); |
| #endif // __SOFTFP__ |
| local->set_operand(dest); |
| _instruction_for_operand.at_put_grow(dest->vreg_number(), local, NULL); |
| java_index += type2size[t]; |
| } |
| |
| if (compilation()->env()->dtrace_method_probes()) { |
| BasicTypeList signature; |
| signature.append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread |
| signature.append(T_METADATA); // Method* |
| LIR_OprList* args = new LIR_OprList(); |
| args->append(getThreadPointer()); |
| LIR_Opr meth = new_register(T_METADATA); |
| __ metadata2reg(method()->constant_encoding(), meth); |
| args->append(meth); |
| call_runtime(&signature, args, CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), voidType, NULL); |
| } |
| |
| if (method()->is_synchronized()) { |
| LIR_Opr obj; |
| if (method()->is_static()) { |
| obj = new_register(T_OBJECT); |
| __ oop2reg(method()->holder()->java_mirror()->constant_encoding(), obj); |
| } else { |
| Local* receiver = x->state()->local_at(0)->as_Local(); |
| assert(receiver != NULL, "must already exist"); |
| obj = receiver->operand(); |
| } |
| assert(obj->is_valid(), "must be valid"); |
| |
| if (method()->is_synchronized() && GenerateSynchronizationCode) { |
| LIR_Opr lock = new_register(T_INT); |
| __ load_stack_address_monitor(0, lock); |
| |
| CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, x->check_flag(Instruction::DeoptimizeOnException)); |
| CodeStub* slow_path = new MonitorEnterStub(obj, lock, info); |
| |
| // receiver is guaranteed non-NULL so don't need CodeEmitInfo |
| __ lock_object(syncTempOpr(), obj, lock, new_register(T_OBJECT), slow_path, NULL); |
| } |
| } |
| if (compilation()->age_code()) { |
| CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, 0), NULL, false); |
| decrement_age(info); |
| } |
| // increment invocation counters if needed |
| if (!method()->is_accessor()) { // Accessors do not have MDOs, so no counting. |
| profile_parameters(x); |
| CodeEmitInfo* info = new CodeEmitInfo(scope()->start()->state()->copy(ValueStack::StateBefore, SynchronizationEntryBCI), NULL, false); |
| increment_invocation_counter(info); |
| } |
| |
| // all blocks with a successor must end with an unconditional jump |
| // to the successor even if they are consecutive |
| __ jump(x->default_sux()); |
| } |
| |
| |
| void LIRGenerator::do_OsrEntry(OsrEntry* x) { |
| // construct our frame and model the production of incoming pointer |
| // to the OSR buffer. |
| __ osr_entry(LIR_Assembler::osrBufferPointer()); |
| LIR_Opr result = rlock_result(x); |
| __ move(LIR_Assembler::osrBufferPointer(), result); |
| } |
| |
| |
| void LIRGenerator::invoke_load_arguments(Invoke* x, LIRItemList* args, const LIR_OprList* arg_list) { |
| assert(args->length() == arg_list->length(), |
| err_msg_res("args=%d, arg_list=%d", args->length(), arg_list->length())); |
| for (int i = x->has_receiver() ? 1 : 0; i < args->length(); i++) { |
| LIRItem* param = args->at(i); |
| LIR_Opr loc = arg_list->at(i); |
| if (loc->is_register()) { |
| param->load_item_force(loc); |
| } else { |
| LIR_Address* addr = loc->as_address_ptr(); |
| param->load_for_store(addr->type()); |
| if (addr->type() == T_OBJECT) { |
| __ move_wide(param->result(), addr); |
| } else |
| if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { |
| __ unaligned_move(param->result(), addr); |
| } else { |
| __ move(param->result(), addr); |
| } |
| } |
| } |
| |
| if (x->has_receiver()) { |
| LIRItem* receiver = args->at(0); |
| LIR_Opr loc = arg_list->at(0); |
| if (loc->is_register()) { |
| receiver->load_item_force(loc); |
| } else { |
| assert(loc->is_address(), "just checking"); |
| receiver->load_for_store(T_OBJECT); |
| __ move_wide(receiver->result(), loc->as_address_ptr()); |
| } |
| } |
| } |
| |
| |
| // Visits all arguments, returns appropriate items without loading them |
| LIRItemList* LIRGenerator::invoke_visit_arguments(Invoke* x) { |
| LIRItemList* argument_items = new LIRItemList(); |
| if (x->has_receiver()) { |
| LIRItem* receiver = new LIRItem(x->receiver(), this); |
| argument_items->append(receiver); |
| } |
| for (int i = 0; i < x->number_of_arguments(); i++) { |
| LIRItem* param = new LIRItem(x->argument_at(i), this); |
| argument_items->append(param); |
| } |
| return argument_items; |
| } |
| |
| |
| // The invoke with receiver has following phases: |
| // a) traverse and load/lock receiver; |
| // b) traverse all arguments -> item-array (invoke_visit_argument) |
| // c) push receiver on stack |
| // d) load each of the items and push on stack |
| // e) unlock receiver |
| // f) move receiver into receiver-register %o0 |
| // g) lock result registers and emit call operation |
| // |
| // Before issuing a call, we must spill-save all values on stack |
| // that are in caller-save register. "spill-save" moves those registers |
| // either in a free callee-save register or spills them if no free |
| // callee save register is available. |
| // |
| // The problem is where to invoke spill-save. |
| // - if invoked between e) and f), we may lock callee save |
| // register in "spill-save" that destroys the receiver register |
| // before f) is executed |
| // - if we rearrange f) to be earlier (by loading %o0) it |
| // may destroy a value on the stack that is currently in %o0 |
| // and is waiting to be spilled |
| // - if we keep the receiver locked while doing spill-save, |
| // we cannot spill it as it is spill-locked |
| // |
| void LIRGenerator::do_Invoke(Invoke* x) { |
| CallingConvention* cc = frame_map()->java_calling_convention(x->signature(), true); |
| |
| LIR_OprList* arg_list = cc->args(); |
| LIRItemList* args = invoke_visit_arguments(x); |
| LIR_Opr receiver = LIR_OprFact::illegalOpr; |
| |
| // setup result register |
| LIR_Opr result_register = LIR_OprFact::illegalOpr; |
| if (x->type() != voidType) { |
| result_register = result_register_for(x->type()); |
| } |
| |
| CodeEmitInfo* info = state_for(x, x->state()); |
| |
| invoke_load_arguments(x, args, arg_list); |
| |
| if (x->has_receiver()) { |
| args->at(0)->load_item_force(LIR_Assembler::receiverOpr()); |
| receiver = args->at(0)->result(); |
| } |
| |
| // emit invoke code |
| bool optimized = x->target_is_loaded() && x->target_is_final(); |
| assert(receiver->is_illegal() || receiver->is_equal(LIR_Assembler::receiverOpr()), "must match"); |
| |
| // JSR 292 |
| // Preserve the SP over MethodHandle call sites, if needed. |
| ciMethod* target = x->target(); |
| bool is_method_handle_invoke = (// %%% FIXME: Are both of these relevant? |
| target->is_method_handle_intrinsic() || |
| target->is_compiled_lambda_form()); |
| if (is_method_handle_invoke) { |
| info->set_is_method_handle_invoke(true); |
| if(FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) { |
| __ move(FrameMap::stack_pointer(), FrameMap::method_handle_invoke_SP_save_opr()); |
| } |
| } |
| |
| switch (x->code()) { |
| case Bytecodes::_invokestatic: |
| __ call_static(target, result_register, |
| SharedRuntime::get_resolve_static_call_stub(), |
| arg_list, info); |
| break; |
| case Bytecodes::_invokespecial: |
| case Bytecodes::_invokevirtual: |
| case Bytecodes::_invokeinterface: |
| // for final target we still produce an inline cache, in order |
| // to be able to call mixed mode |
| if (x->code() == Bytecodes::_invokespecial || optimized) { |
| __ call_opt_virtual(target, receiver, result_register, |
| SharedRuntime::get_resolve_opt_virtual_call_stub(), |
| arg_list, info); |
| } else if (x->vtable_index() < 0) { |
| __ call_icvirtual(target, receiver, result_register, |
| SharedRuntime::get_resolve_virtual_call_stub(), |
| arg_list, info); |
| } else { |
| int entry_offset = InstanceKlass::vtable_start_offset() + x->vtable_index() * vtableEntry::size(); |
| int vtable_offset = entry_offset * wordSize + vtableEntry::method_offset_in_bytes(); |
| __ call_virtual(target, receiver, result_register, vtable_offset, arg_list, info); |
| } |
| break; |
| case Bytecodes::_invokedynamic: { |
| __ call_dynamic(target, receiver, result_register, |
| SharedRuntime::get_resolve_static_call_stub(), |
| arg_list, info); |
| break; |
| } |
| default: |
| fatal(err_msg("unexpected bytecode: %s", Bytecodes::name(x->code()))); |
| break; |
| } |
| |
| // JSR 292 |
| // Restore the SP after MethodHandle call sites, if needed. |
| if (is_method_handle_invoke |
| && FrameMap::method_handle_invoke_SP_save_opr() != LIR_OprFact::illegalOpr) { |
| __ move(FrameMap::method_handle_invoke_SP_save_opr(), FrameMap::stack_pointer()); |
| } |
| |
| if (x->type()->is_float() || x->type()->is_double()) { |
| // Force rounding of results from non-strictfp when in strictfp |
| // scope (or when we don't know the strictness of the callee, to |
| // be safe.) |
| if (method()->is_strict()) { |
| if (!x->target_is_loaded() || !x->target_is_strictfp()) { |
| result_register = round_item(result_register); |
| } |
| } |
| } |
| |
| if (result_register->is_valid()) { |
| LIR_Opr result = rlock_result(x); |
| __ move(result_register, result); |
| } |
| } |
| |
| |
| void LIRGenerator::do_FPIntrinsics(Intrinsic* x) { |
| assert(x->number_of_arguments() == 1, "wrong type"); |
| LIRItem value (x->argument_at(0), this); |
| LIR_Opr reg = rlock_result(x); |
| value.load_item(); |
| LIR_Opr tmp = force_to_spill(value.result(), as_BasicType(x->type())); |
| __ move(tmp, reg); |
| } |
| |
| |
| |
| // Code for : x->x() {x->cond()} x->y() ? x->tval() : x->fval() |
| void LIRGenerator::do_IfOp(IfOp* x) { |
| #ifdef ASSERT |
| { |
| ValueTag xtag = x->x()->type()->tag(); |
| ValueTag ttag = x->tval()->type()->tag(); |
| assert(xtag == intTag || xtag == objectTag, "cannot handle others"); |
| assert(ttag == addressTag || ttag == intTag || ttag == objectTag || ttag == longTag, "cannot handle others"); |
| assert(ttag == x->fval()->type()->tag(), "cannot handle others"); |
| } |
| #endif |
| |
| LIRItem left(x->x(), this); |
| LIRItem right(x->y(), this); |
| left.load_item(); |
| if (can_inline_as_constant(right.value())) { |
| right.dont_load_item(); |
| } else { |
| right.load_item(); |
| } |
| |
| LIRItem t_val(x->tval(), this); |
| LIRItem f_val(x->fval(), this); |
| t_val.dont_load_item(); |
| f_val.dont_load_item(); |
| LIR_Opr reg = rlock_result(x); |
| |
| __ cmp(lir_cond(x->cond()), left.result(), right.result()); |
| __ cmove(lir_cond(x->cond()), t_val.result(), f_val.result(), reg, as_BasicType(x->x()->type())); |
| } |
| |
| void LIRGenerator::do_RuntimeCall(address routine, int expected_arguments, Intrinsic* x) { |
| assert(x->number_of_arguments() == expected_arguments, "wrong type"); |
| LIR_Opr reg = result_register_for(x->type()); |
| __ call_runtime_leaf(routine, getThreadTemp(), |
| reg, new LIR_OprList()); |
| LIR_Opr result = rlock_result(x); |
| __ move(reg, result); |
| } |
| |
| #ifdef TRACE_HAVE_INTRINSICS |
| void LIRGenerator::do_ThreadIDIntrinsic(Intrinsic* x) { |
| LIR_Opr thread = getThreadPointer(); |
| LIR_Opr osthread = new_pointer_register(); |
| __ move(new LIR_Address(thread, in_bytes(JavaThread::osthread_offset()), osthread->type()), osthread); |
| size_t thread_id_size = OSThread::thread_id_size(); |
| if (thread_id_size == (size_t) BytesPerLong) { |
| LIR_Opr id = new_register(T_LONG); |
| __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_LONG), id); |
| __ convert(Bytecodes::_l2i, id, rlock_result(x)); |
| } else if (thread_id_size == (size_t) BytesPerInt) { |
| __ move(new LIR_Address(osthread, in_bytes(OSThread::thread_id_offset()), T_INT), rlock_result(x)); |
| } else { |
| ShouldNotReachHere(); |
| } |
| } |
| |
| void LIRGenerator::do_ClassIDIntrinsic(Intrinsic* x) { |
| CodeEmitInfo* info = state_for(x); |
| CodeEmitInfo* info2 = new CodeEmitInfo(info); // Clone for the second null check |
| BasicType klass_pointer_type = NOT_LP64(T_INT) LP64_ONLY(T_LONG); |
| assert(info != NULL, "must have info"); |
| LIRItem arg(x->argument_at(1), this); |
| arg.load_item(); |
| LIR_Opr klass = new_pointer_register(); |
| __ move(new LIR_Address(arg.result(), java_lang_Class::klass_offset_in_bytes(), klass_pointer_type), klass, info); |
| LIR_Opr id = new_register(T_LONG); |
| ByteSize offset = TRACE_ID_OFFSET; |
| LIR_Address* trace_id_addr = new LIR_Address(klass, in_bytes(offset), T_LONG); |
| __ move(trace_id_addr, id); |
| __ logical_or(id, LIR_OprFact::longConst(0x01l), id); |
| __ store(id, trace_id_addr); |
| __ logical_and(id, LIR_OprFact::longConst(~0x3l), id); |
| __ move(id, rlock_result(x)); |
| } |
| #endif |
| |
| void LIRGenerator::do_Intrinsic(Intrinsic* x) { |
| switch (x->id()) { |
| case vmIntrinsics::_intBitsToFloat : |
| case vmIntrinsics::_doubleToRawLongBits : |
| case vmIntrinsics::_longBitsToDouble : |
| case vmIntrinsics::_floatToRawIntBits : { |
| do_FPIntrinsics(x); |
| break; |
| } |
| |
| #ifdef TRACE_HAVE_INTRINSICS |
| case vmIntrinsics::_threadID: do_ThreadIDIntrinsic(x); break; |
| case vmIntrinsics::_classID: do_ClassIDIntrinsic(x); break; |
| case vmIntrinsics::_counterTime: |
| do_RuntimeCall(CAST_FROM_FN_PTR(address, TRACE_TIME_METHOD), 0, x); |
| break; |
| #endif |
| |
| case vmIntrinsics::_currentTimeMillis: |
| do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeMillis), 0, x); |
| break; |
| |
| case vmIntrinsics::_nanoTime: |
| do_RuntimeCall(CAST_FROM_FN_PTR(address, os::javaTimeNanos), 0, x); |
| break; |
| |
| case vmIntrinsics::_Object_init: do_RegisterFinalizer(x); break; |
| case vmIntrinsics::_isInstance: do_isInstance(x); break; |
| case vmIntrinsics::_getClass: do_getClass(x); break; |
| case vmIntrinsics::_currentThread: do_currentThread(x); break; |
| |
| case vmIntrinsics::_dlog: // fall through |
| case vmIntrinsics::_dlog10: // fall through |
| case vmIntrinsics::_dabs: // fall through |
| case vmIntrinsics::_dsqrt: // fall through |
| case vmIntrinsics::_dtan: // fall through |
| case vmIntrinsics::_dsin : // fall through |
| case vmIntrinsics::_dcos : // fall through |
| case vmIntrinsics::_dexp : // fall through |
| case vmIntrinsics::_dpow : do_MathIntrinsic(x); break; |
| case vmIntrinsics::_arraycopy: do_ArrayCopy(x); break; |
| |
| // java.nio.Buffer.checkIndex |
| case vmIntrinsics::_checkIndex: do_NIOCheckIndex(x); break; |
| |
| case vmIntrinsics::_compareAndSwapObject: |
| do_CompareAndSwap(x, objectType); |
| break; |
| case vmIntrinsics::_compareAndSwapInt: |
| do_CompareAndSwap(x, intType); |
| break; |
| case vmIntrinsics::_compareAndSwapLong: |
| do_CompareAndSwap(x, longType); |
| break; |
| |
| case vmIntrinsics::_loadFence : |
| if (os::is_MP()) __ membar_acquire(); |
| break; |
| case vmIntrinsics::_storeFence: |
| if (os::is_MP()) __ membar_release(); |
| break; |
| case vmIntrinsics::_fullFence : |
| if (os::is_MP()) __ membar(); |
| break; |
| |
| case vmIntrinsics::_Reference_get: |
| do_Reference_get(x); |
| break; |
| |
| case vmIntrinsics::_updateCRC32: |
| case vmIntrinsics::_updateBytesCRC32: |
| case vmIntrinsics::_updateByteBufferCRC32: |
| do_update_CRC32(x); |
| break; |
| |
| default: ShouldNotReachHere(); break; |
| } |
| } |
| |
| void LIRGenerator::profile_arguments(ProfileCall* x) { |
| if (compilation()->profile_arguments()) { |
| int bci = x->bci_of_invoke(); |
| ciMethodData* md = x->method()->method_data_or_null(); |
| ciProfileData* data = md->bci_to_data(bci); |
| if ((data->is_CallTypeData() && data->as_CallTypeData()->has_arguments()) || |
| (data->is_VirtualCallTypeData() && data->as_VirtualCallTypeData()->has_arguments())) { |
| ByteSize extra = data->is_CallTypeData() ? CallTypeData::args_data_offset() : VirtualCallTypeData::args_data_offset(); |
| int base_offset = md->byte_offset_of_slot(data, extra); |
| LIR_Opr mdp = LIR_OprFact::illegalOpr; |
| ciTypeStackSlotEntries* args = data->is_CallTypeData() ? ((ciCallTypeData*)data)->args() : ((ciVirtualCallTypeData*)data)->args(); |
| |
| Bytecodes::Code bc = x->method()->java_code_at_bci(bci); |
| int start = 0; |
| int stop = data->is_CallTypeData() ? ((ciCallTypeData*)data)->number_of_arguments() : ((ciVirtualCallTypeData*)data)->number_of_arguments(); |
| if (x->inlined() && x->callee()->is_static() && Bytecodes::has_receiver(bc)) { |
| // first argument is not profiled at call (method handle invoke) |
| assert(x->method()->raw_code_at_bci(bci) == Bytecodes::_invokehandle, "invokehandle expected"); |
| start = 1; |
| } |
| ciSignature* callee_signature = x->callee()->signature(); |
| // method handle call to virtual method |
| bool has_receiver = x->inlined() && !x->callee()->is_static() && !Bytecodes::has_receiver(bc); |
| ciSignatureStream callee_signature_stream(callee_signature, has_receiver ? x->callee()->holder() : NULL); |
| |
| bool ignored_will_link; |
| ciSignature* signature_at_call = NULL; |
| x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call); |
| ciSignatureStream signature_at_call_stream(signature_at_call); |
| |
| // if called through method handle invoke, some arguments may have been popped |
| for (int i = 0; i < stop && i+start < x->nb_profiled_args(); i++) { |
| int off = in_bytes(TypeEntriesAtCall::argument_type_offset(i)) - in_bytes(TypeEntriesAtCall::args_data_offset()); |
| ciKlass* exact = profile_type(md, base_offset, off, |
| args->type(i), x->profiled_arg_at(i+start), mdp, |
| !x->arg_needs_null_check(i+start), |
| signature_at_call_stream.next_klass(), callee_signature_stream.next_klass()); |
| if (exact != NULL) { |
| md->set_argument_type(bci, i, exact); |
| } |
| } |
| } else { |
| #ifdef ASSERT |
| Bytecodes::Code code = x->method()->raw_code_at_bci(x->bci_of_invoke()); |
| int n = x->nb_profiled_args(); |
| assert(MethodData::profile_parameters() && (MethodData::profile_arguments_jsr292_only() || |
| (x->inlined() && ((code == Bytecodes::_invokedynamic && n <= 1) || (code == Bytecodes::_invokehandle && n <= 2)))), |
| "only at JSR292 bytecodes"); |
| #endif |
| } |
| } |
| } |
| |
| // profile parameters on entry to an inlined method |
| void LIRGenerator::profile_parameters_at_call(ProfileCall* x) { |
| if (compilation()->profile_parameters() && x->inlined()) { |
| ciMethodData* md = x->callee()->method_data_or_null(); |
| if (md != NULL) { |
| ciParametersTypeData* parameters_type_data = md->parameters_type_data(); |
| if (parameters_type_data != NULL) { |
| ciTypeStackSlotEntries* parameters = parameters_type_data->parameters(); |
| LIR_Opr mdp = LIR_OprFact::illegalOpr; |
| bool has_receiver = !x->callee()->is_static(); |
| ciSignature* sig = x->callee()->signature(); |
| ciSignatureStream sig_stream(sig, has_receiver ? x->callee()->holder() : NULL); |
| int i = 0; // to iterate on the Instructions |
| Value arg = x->recv(); |
| bool not_null = false; |
| int bci = x->bci_of_invoke(); |
| Bytecodes::Code bc = x->method()->java_code_at_bci(bci); |
| // The first parameter is the receiver so that's what we start |
| // with if it exists. One exception is method handle call to |
| // virtual method: the receiver is in the args list |
| if (arg == NULL || !Bytecodes::has_receiver(bc)) { |
| i = 1; |
| arg = x->profiled_arg_at(0); |
| not_null = !x->arg_needs_null_check(0); |
| } |
| int k = 0; // to iterate on the profile data |
| for (;;) { |
| intptr_t profiled_k = parameters->type(k); |
| ciKlass* exact = profile_type(md, md->byte_offset_of_slot(parameters_type_data, ParametersTypeData::type_offset(0)), |
| in_bytes(ParametersTypeData::type_offset(k)) - in_bytes(ParametersTypeData::type_offset(0)), |
| profiled_k, arg, mdp, not_null, sig_stream.next_klass(), NULL); |
| // If the profile is known statically set it once for all and do not emit any code |
| if (exact != NULL) { |
| md->set_parameter_type(k, exact); |
| } |
| k++; |
| if (k >= parameters_type_data->number_of_parameters()) { |
| #ifdef ASSERT |
| int extra = 0; |
| if (MethodData::profile_arguments() && TypeProfileParmsLimit != -1 && |
| x->nb_profiled_args() >= TypeProfileParmsLimit && |
| x->recv() != NULL && Bytecodes::has_receiver(bc)) { |
| extra += 1; |
| } |
| assert(i == x->nb_profiled_args() - extra || (TypeProfileParmsLimit != -1 && TypeProfileArgsLimit > TypeProfileParmsLimit), "unused parameters?"); |
| #endif |
| break; |
| } |
| arg = x->profiled_arg_at(i); |
| not_null = !x->arg_needs_null_check(i); |
| i++; |
| } |
| } |
| } |
| } |
| } |
| |
| void LIRGenerator::do_ProfileCall(ProfileCall* x) { |
| // Need recv in a temporary register so it interferes with the other temporaries |
| LIR_Opr recv = LIR_OprFact::illegalOpr; |
| LIR_Opr mdo = new_register(T_OBJECT); |
| // tmp is used to hold the counters on SPARC |
| LIR_Opr tmp = new_pointer_register(); |
| |
| if (x->nb_profiled_args() > 0) { |
| profile_arguments(x); |
| } |
| |
| // profile parameters on inlined method entry including receiver |
| if (x->recv() != NULL || x->nb_profiled_args() > 0) { |
| profile_parameters_at_call(x); |
| } |
| |
| if (x->recv() != NULL) { |
| LIRItem value(x->recv(), this); |
| value.load_item(); |
| recv = new_register(T_OBJECT); |
| __ move(value.result(), recv); |
| } |
| __ profile_call(x->method(), x->bci_of_invoke(), x->callee(), mdo, recv, tmp, x->known_holder()); |
| } |
| |
| void LIRGenerator::do_ProfileReturnType(ProfileReturnType* x) { |
| int bci = x->bci_of_invoke(); |
| ciMethodData* md = x->method()->method_data_or_null(); |
| ciProfileData* data = md->bci_to_data(bci); |
| assert(data->is_CallTypeData() || data->is_VirtualCallTypeData(), "wrong profile data type"); |
| ciReturnTypeEntry* ret = data->is_CallTypeData() ? ((ciCallTypeData*)data)->ret() : ((ciVirtualCallTypeData*)data)->ret(); |
| LIR_Opr mdp = LIR_OprFact::illegalOpr; |
| |
| bool ignored_will_link; |
| ciSignature* signature_at_call = NULL; |
| x->method()->get_method_at_bci(bci, ignored_will_link, &signature_at_call); |
| |
| // The offset within the MDO of the entry to update may be too large |
| // to be used in load/store instructions on some platforms. So have |
| // profile_type() compute the address of the profile in a register. |
| ciKlass* exact = profile_type(md, md->byte_offset_of_slot(data, ret->type_offset()), 0, |
| ret->type(), x->ret(), mdp, |
| !x->needs_null_check(), |
| signature_at_call->return_type()->as_klass(), |
| x->callee()->signature()->return_type()->as_klass()); |
| if (exact != NULL) { |
| md->set_return_type(bci, exact); |
| } |
| } |
| |
| void LIRGenerator::do_ProfileInvoke(ProfileInvoke* x) { |
| // We can safely ignore accessors here, since c2 will inline them anyway, |
| // accessors are also always mature. |
| if (!x->inlinee()->is_accessor()) { |
| CodeEmitInfo* info = state_for(x, x->state(), true); |
| // Notify the runtime very infrequently only to take care of counter overflows |
| int freq_log = Tier23InlineeNotifyFreqLog; |
| double scale; |
| if (_method->has_option_value("CompileThresholdScaling", scale)) { |
| freq_log = Arguments::scaled_freq_log(freq_log, scale); |
| } |
| increment_event_counter_impl(info, x->inlinee(), right_n_bits(freq_log), InvocationEntryBci, false, true); |
| } |
| } |
| |
| void LIRGenerator::increment_event_counter(CodeEmitInfo* info, int bci, bool backedge) { |
| int freq_log; |
| int level = compilation()->env()->comp_level(); |
| if (level == CompLevel_limited_profile) { |
| freq_log = (backedge ? Tier2BackedgeNotifyFreqLog : Tier2InvokeNotifyFreqLog); |
| } else if (level == CompLevel_full_profile) { |
| freq_log = (backedge ? Tier3BackedgeNotifyFreqLog : Tier3InvokeNotifyFreqLog); |
| } else { |
| ShouldNotReachHere(); |
| } |
| // Increment the appropriate invocation/backedge counter and notify the runtime. |
| double scale; |
| if (_method->has_option_value("CompileThresholdScaling", scale)) { |
| freq_log = Arguments::scaled_freq_log(freq_log, scale); |
| } |
| increment_event_counter_impl(info, info->scope()->method(), right_n_bits(freq_log), bci, backedge, true); |
| } |
| |
| void LIRGenerator::decrement_age(CodeEmitInfo* info) { |
| ciMethod* method = info->scope()->method(); |
| MethodCounters* mc_adr = method->ensure_method_counters(); |
| if (mc_adr != NULL) { |
| LIR_Opr mc = new_pointer_register(); |
| __ move(LIR_OprFact::intptrConst(mc_adr), mc); |
| int offset = in_bytes(MethodCounters::nmethod_age_offset()); |
| LIR_Address* counter = new LIR_Address(mc, offset, T_INT); |
| LIR_Opr result = new_register(T_INT); |
| __ load(counter, result); |
| __ sub(result, LIR_OprFact::intConst(1), result); |
| __ store(result, counter); |
| // DeoptimizeStub will reexecute from the current state in code info. |
| CodeStub* deopt = new DeoptimizeStub(info, Deoptimization::Reason_tenured, |
| Deoptimization::Action_make_not_entrant); |
| __ cmp(lir_cond_lessEqual, result, LIR_OprFact::intConst(0)); |
| __ branch(lir_cond_lessEqual, T_INT, deopt); |
| } |
| } |
| |
| |
| void LIRGenerator::increment_event_counter_impl(CodeEmitInfo* info, |
| ciMethod *method, int frequency, |
| int bci, bool backedge, bool notify) { |
| assert(frequency == 0 || is_power_of_2(frequency + 1), "Frequency must be x^2 - 1 or 0"); |
| int level = _compilation->env()->comp_level(); |
| assert(level > CompLevel_simple, "Shouldn't be here"); |
| |
| int offset = -1; |
| LIR_Opr counter_holder; |
| if (level == CompLevel_limited_profile) { |
| MethodCounters* counters_adr = method->ensure_method_counters(); |
| if (counters_adr == NULL) { |
| bailout("method counters allocation failed"); |
| return; |
| } |
| counter_holder = new_pointer_register(); |
| __ move(LIR_OprFact::intptrConst(counters_adr), counter_holder); |
| offset = in_bytes(backedge ? MethodCounters::backedge_counter_offset() : |
| MethodCounters::invocation_counter_offset()); |
| } else if (level == CompLevel_full_profile) { |
| counter_holder = new_register(T_METADATA); |
| offset = in_bytes(backedge ? MethodData::backedge_counter_offset() : |
| MethodData::invocation_counter_offset()); |
| ciMethodData* md = method->method_data_or_null(); |
| assert(md != NULL, "Sanity"); |
| __ metadata2reg(md->constant_encoding(), counter_holder); |
| } else { |
| ShouldNotReachHere(); |
| } |
| LIR_Address* counter = new LIR_Address(counter_holder, offset, T_INT); |
| LIR_Opr result = new_register(T_INT); |
| __ load(counter, result); |
| __ add(result, LIR_OprFact::intConst(InvocationCounter::count_increment), result); |
| __ store(result, counter); |
| if (notify) { |
| LIR_Opr mask = load_immediate(frequency << InvocationCounter::count_shift, T_INT); |
| LIR_Opr meth = new_register(T_METADATA); |
| __ metadata2reg(method->constant_encoding(), meth); |
| __ logical_and(result, mask, result); |
| __ cmp(lir_cond_equal, result, LIR_OprFact::intConst(0)); |
| // The bci for info can point to cmp for if's we want the if bci |
| CodeStub* overflow = new CounterOverflowStub(info, bci, meth); |
| __ branch(lir_cond_equal, T_INT, overflow); |
| __ branch_destination(overflow->continuation()); |
| } |
| } |
| |
| void LIRGenerator::do_RuntimeCall(RuntimeCall* x) { |
| LIR_OprList* args = new LIR_OprList(x->number_of_arguments()); |
| BasicTypeList* signature = new BasicTypeList(x->number_of_arguments()); |
| |
| if (x->pass_thread()) { |
| signature->append(LP64_ONLY(T_LONG) NOT_LP64(T_INT)); // thread |
| args->append(getThreadPointer()); |
| } |
| |
| for (int i = 0; i < x->number_of_arguments(); i++) { |
| Value a = x->argument_at(i); |
| LIRItem* item = new LIRItem(a, this); |
| item->load_item(); |
| args->append(item->result()); |
| signature->append(as_BasicType(a->type())); |
| } |
| |
| LIR_Opr result = call_runtime(signature, args, x->entry(), x->type(), NULL); |
| if (x->type() == voidType) { |
| set_no_result(x); |
| } else { |
| __ move(result, rlock_result(x)); |
| } |
| } |
| |
| #ifdef ASSERT |
| void LIRGenerator::do_Assert(Assert *x) { |
| ValueTag tag = x->x()->type()->tag(); |
| If::Condition cond = x->cond(); |
| |
| LIRItem xitem(x->x(), this); |
| LIRItem yitem(x->y(), this); |
| LIRItem* xin = &xitem; |
| LIRItem* yin = &yitem; |
| |
| assert(tag == intTag, "Only integer assertions are valid!"); |
| |
| xin->load_item(); |
| yin->dont_load_item(); |
| |
| set_no_result(x); |
| |
| LIR_Opr left = xin->result(); |
| LIR_Opr right = yin->result(); |
| |
| __ lir_assert(lir_cond(x->cond()), left, right, x->message(), true); |
| } |
| #endif |
| |
| void LIRGenerator::do_RangeCheckPredicate(RangeCheckPredicate *x) { |
| |
| |
| Instruction *a = x->x(); |
| Instruction *b = x->y(); |
| if (!a || StressRangeCheckElimination) { |
| assert(!b || StressRangeCheckElimination, "B must also be null"); |
| |
| CodeEmitInfo *info = state_for(x, x->state()); |
| CodeStub* stub = new PredicateFailedStub(info); |
| |
| __ jump(stub); |
| } else if (a->type()->as_IntConstant() && b->type()->as_IntConstant()) { |
| int a_int = a->type()->as_IntConstant()->value(); |
| int b_int = b->type()->as_IntConstant()->value(); |
| |
| bool ok = false; |
| |
| switch(x->cond()) { |
| case Instruction::eql: ok = (a_int == b_int); break; |
| case Instruction::neq: ok = (a_int != b_int); break; |
| case Instruction::lss: ok = (a_int < b_int); break; |
| case Instruction::leq: ok = (a_int <= b_int); break; |
| case Instruction::gtr: ok = (a_int > b_int); break; |
| case Instruction::geq: ok = (a_int >= b_int); break; |
| case Instruction::aeq: ok = ((unsigned int)a_int >= (unsigned int)b_int); break; |
| case Instruction::beq: ok = ((unsigned int)a_int <= (unsigned int)b_int); break; |
| default: ShouldNotReachHere(); |
| } |
| |
| if (ok) { |
| |
| CodeEmitInfo *info = state_for(x, x->state()); |
| CodeStub* stub = new PredicateFailedStub(info); |
| |
| __ jump(stub); |
| } |
| } else { |
| |
| ValueTag tag = x->x()->type()->tag(); |
| If::Condition cond = x->cond(); |
| LIRItem xitem(x->x(), this); |
| LIRItem yitem(x->y(), this); |
| LIRItem* xin = &xitem; |
| LIRItem* yin = &yitem; |
| |
| assert(tag == intTag, "Only integer deoptimizations are valid!"); |
| |
| xin->load_item(); |
| yin->dont_load_item(); |
| set_no_result(x); |
| |
| LIR_Opr left = xin->result(); |
| LIR_Opr right = yin->result(); |
| |
| CodeEmitInfo *info = state_for(x, x->state()); |
| CodeStub* stub = new PredicateFailedStub(info); |
| |
| __ cmp(lir_cond(cond), left, right); |
| __ branch(lir_cond(cond), right->type(), stub); |
| } |
| } |
| |
| |
| LIR_Opr LIRGenerator::call_runtime(Value arg1, address entry, ValueType* result_type, CodeEmitInfo* info) { |
| LIRItemList args(1); |
| LIRItem value(arg1, this); |
| args.append(&value); |
| BasicTypeList signature; |
| signature.append(as_BasicType(arg1->type())); |
| |
| return call_runtime(&signature, &args, entry, result_type, info); |
| } |
| |
| |
| LIR_Opr LIRGenerator::call_runtime(Value arg1, Value arg2, address entry, ValueType* result_type, CodeEmitInfo* info) { |
| LIRItemList args(2); |
| LIRItem value1(arg1, this); |
| LIRItem value2(arg2, this); |
| args.append(&value1); |
| args.append(&value2); |
| BasicTypeList signature; |
| signature.append(as_BasicType(arg1->type())); |
| signature.append(as_BasicType(arg2->type())); |
| |
| return call_runtime(&signature, &args, entry, result_type, info); |
| } |
| |
| |
| LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIR_OprList* args, |
| address entry, ValueType* result_type, CodeEmitInfo* info) { |
| // get a result register |
| LIR_Opr phys_reg = LIR_OprFact::illegalOpr; |
| LIR_Opr result = LIR_OprFact::illegalOpr; |
| if (result_type->tag() != voidTag) { |
| result = new_register(result_type); |
| phys_reg = result_register_for(result_type); |
| } |
| |
| // move the arguments into the correct location |
| CallingConvention* cc = frame_map()->c_calling_convention(signature); |
| assert(cc->length() == args->length(), "argument mismatch"); |
| for (int i = 0; i < args->length(); i++) { |
| LIR_Opr arg = args->at(i); |
| LIR_Opr loc = cc->at(i); |
| if (loc->is_register()) { |
| __ move(arg, loc); |
| } else { |
| LIR_Address* addr = loc->as_address_ptr(); |
| // if (!can_store_as_constant(arg)) { |
| // LIR_Opr tmp = new_register(arg->type()); |
| // __ move(arg, tmp); |
| // arg = tmp; |
| // } |
| if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { |
| __ unaligned_move(arg, addr); |
| } else { |
| __ move(arg, addr); |
| } |
| } |
| } |
| |
| if (info) { |
| __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); |
| } else { |
| __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); |
| } |
| if (result->is_valid()) { |
| __ move(phys_reg, result); |
| } |
| return result; |
| } |
| |
| |
| LIR_Opr LIRGenerator::call_runtime(BasicTypeArray* signature, LIRItemList* args, |
| address entry, ValueType* result_type, CodeEmitInfo* info) { |
| // get a result register |
| LIR_Opr phys_reg = LIR_OprFact::illegalOpr; |
| LIR_Opr result = LIR_OprFact::illegalOpr; |
| if (result_type->tag() != voidTag) { |
| result = new_register(result_type); |
| phys_reg = result_register_for(result_type); |
| } |
| |
| // move the arguments into the correct location |
| CallingConvention* cc = frame_map()->c_calling_convention(signature); |
| |
| assert(cc->length() == args->length(), "argument mismatch"); |
| for (int i = 0; i < args->length(); i++) { |
| LIRItem* arg = args->at(i); |
| LIR_Opr loc = cc->at(i); |
| if (loc->is_register()) { |
| arg->load_item_force(loc); |
| } else { |
| LIR_Address* addr = loc->as_address_ptr(); |
| arg->load_for_store(addr->type()); |
| if (addr->type() == T_LONG || addr->type() == T_DOUBLE) { |
| __ unaligned_move(arg->result(), addr); |
| } else { |
| __ move(arg->result(), addr); |
| } |
| } |
| } |
| |
| if (info) { |
| __ call_runtime(entry, getThreadTemp(), phys_reg, cc->args(), info); |
| } else { |
| __ call_runtime_leaf(entry, getThreadTemp(), phys_reg, cc->args()); |
| } |
| if (result->is_valid()) { |
| __ move(phys_reg, result); |
| } |
| return result; |
| } |
| |
| void LIRGenerator::do_MemBar(MemBar* x) { |
| if (os::is_MP()) { |
| LIR_Code code = x->code(); |
| switch(code) { |
| case lir_membar_acquire : __ membar_acquire(); break; |
| case lir_membar_release : __ membar_release(); break; |
| case lir_membar : __ membar(); break; |
| case lir_membar_loadload : __ membar_loadload(); break; |
| case lir_membar_storestore: __ membar_storestore(); break; |
| case lir_membar_loadstore : __ membar_loadstore(); break; |
| case lir_membar_storeload : __ membar_storeload(); break; |
| default : ShouldNotReachHere(); break; |
| } |
| } |
| } |