// Copyright 2014 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "src/compiler/js-graph.h" #include "src/codegen/code-factory.h" #include "src/compiler/node-properties.h" #include "src/compiler/typer.h" #include "src/objects-inl.h" namespace v8 { namespace internal { namespace compiler { #define GET_CACHED_FIELD(ptr, expr) (*(ptr)) ? *(ptr) : (*(ptr) = (expr)) #define DEFINE_GETTER(name, expr) \ Node* JSGraph::name() { return GET_CACHED_FIELD(&name##_, expr); } Node* JSGraph::CEntryStubConstant(int result_size, SaveFPRegsMode save_doubles, ArgvMode argv_mode, bool builtin_exit_frame) { if (save_doubles == kDontSaveFPRegs && argv_mode == kArgvOnStack) { DCHECK(result_size >= 1 && result_size <= 3); if (!builtin_exit_frame) { Node** ptr = nullptr; if (result_size == 1) { ptr = &CEntryStub1Constant_; } else if (result_size == 2) { ptr = &CEntryStub2Constant_; } else { DCHECK_EQ(3, result_size); ptr = &CEntryStub3Constant_; } return GET_CACHED_FIELD(ptr, HeapConstant(CodeFactory::CEntry( isolate(), result_size, save_doubles, argv_mode, builtin_exit_frame))); } Node** ptr = builtin_exit_frame ? &CEntryStub1WithBuiltinExitFrameConstant_ : &CEntryStub1Constant_; return GET_CACHED_FIELD(ptr, HeapConstant(CodeFactory::CEntry( isolate(), result_size, save_doubles, argv_mode, builtin_exit_frame))); } return HeapConstant(CodeFactory::CEntry(isolate(), result_size, save_doubles, argv_mode, builtin_exit_frame)); } Node* JSGraph::Constant(Handle<Object> value) { // Dereference the handle to determine if a number constant or other // canonicalized node can be used. if (value->IsNumber()) { return Constant(value->Number()); } else if (value->IsUndefined(isolate())) { return UndefinedConstant(); } else if (value->IsTrue(isolate())) { return TrueConstant(); } else if (value->IsFalse(isolate())) { return FalseConstant(); } else if (value->IsNull(isolate())) { return NullConstant(); } else if (value->IsTheHole(isolate())) { return TheHoleConstant(); } else { return HeapConstant(Handle<HeapObject>::cast(value)); } } Node* JSGraph::Constant(const ObjectRef& ref) { if (ref.IsSmi()) return Constant(ref.AsSmi()); OddballType oddball_type = ref.AsHeapObject().GetHeapObjectType().oddball_type(); if (ref.IsHeapNumber()) { return Constant(ref.AsHeapNumber().value()); } else if (oddball_type == OddballType::kUndefined) { DCHECK(ref.object().equals(isolate()->factory()->undefined_value())); return UndefinedConstant(); } else if (oddball_type == OddballType::kNull) { DCHECK(ref.object().equals(isolate()->factory()->null_value())); return NullConstant(); } else if (oddball_type == OddballType::kHole) { DCHECK(ref.object().equals(isolate()->factory()->the_hole_value())); return TheHoleConstant(); } else if (oddball_type == OddballType::kBoolean) { if (ref.object().equals(isolate()->factory()->true_value())) { return TrueConstant(); } else { DCHECK(ref.object().equals(isolate()->factory()->false_value())); return FalseConstant(); } } else { return HeapConstant(ref.AsHeapObject().object()); } } Node* JSGraph::Constant(double value) { if (bit_cast<int64_t>(value) == bit_cast<int64_t>(0.0)) return ZeroConstant(); if (bit_cast<int64_t>(value) == bit_cast<int64_t>(1.0)) return OneConstant(); return NumberConstant(value); } Node* JSGraph::NumberConstant(double value) { Node** loc = cache_.FindNumberConstant(value); if (*loc == nullptr) { *loc = graph()->NewNode(common()->NumberConstant(value)); } return *loc; } Node* JSGraph::HeapConstant(Handle<HeapObject> value) { Node** loc = cache_.FindHeapConstant(value); if (*loc == nullptr) { *loc = graph()->NewNode(common()->HeapConstant(value)); } return *loc; } void JSGraph::GetCachedNodes(NodeVector* nodes) { cache_.GetCachedNodes(nodes); #define DO_CACHED_FIELD(name) \ if (name##_) nodes->push_back(name##_); CACHED_GLOBAL_LIST(DO_CACHED_FIELD) CACHED_CENTRY_LIST(DO_CACHED_FIELD) #undef DO_CACHED_FIELD } DEFINE_GETTER(AllocateInYoungGenerationStubConstant, HeapConstant(BUILTIN_CODE(isolate(), AllocateInYoungGeneration))) DEFINE_GETTER(AllocateInOldGenerationStubConstant, HeapConstant(BUILTIN_CODE(isolate(), AllocateInOldGeneration))) DEFINE_GETTER(ArrayConstructorStubConstant, HeapConstant(BUILTIN_CODE(isolate(), ArrayConstructorImpl))) DEFINE_GETTER(BigIntMapConstant, HeapConstant(factory()->bigint_map())) DEFINE_GETTER(BooleanMapConstant, HeapConstant(factory()->boolean_map())) DEFINE_GETTER(ToNumberBuiltinConstant, HeapConstant(BUILTIN_CODE(isolate(), ToNumber))) DEFINE_GETTER(EmptyFixedArrayConstant, HeapConstant(factory()->empty_fixed_array())) DEFINE_GETTER(EmptyStringConstant, HeapConstant(factory()->empty_string())) DEFINE_GETTER(FixedArrayMapConstant, HeapConstant(factory()->fixed_array_map())) DEFINE_GETTER(PropertyArrayMapConstant, HeapConstant(factory()->property_array_map())) DEFINE_GETTER(FixedDoubleArrayMapConstant, HeapConstant(factory()->fixed_double_array_map())) DEFINE_GETTER(HeapNumberMapConstant, HeapConstant(factory()->heap_number_map())) DEFINE_GETTER(OptimizedOutConstant, HeapConstant(factory()->optimized_out())) DEFINE_GETTER(StaleRegisterConstant, HeapConstant(factory()->stale_register())) DEFINE_GETTER(UndefinedConstant, HeapConstant(factory()->undefined_value())) DEFINE_GETTER(TheHoleConstant, HeapConstant(factory()->the_hole_value())) DEFINE_GETTER(TrueConstant, HeapConstant(factory()->true_value())) DEFINE_GETTER(FalseConstant, HeapConstant(factory()->false_value())) DEFINE_GETTER(NullConstant, HeapConstant(factory()->null_value())) DEFINE_GETTER(ZeroConstant, NumberConstant(0.0)) DEFINE_GETTER(OneConstant, NumberConstant(1.0)) DEFINE_GETTER(MinusOneConstant, NumberConstant(-1.0)) DEFINE_GETTER(NaNConstant, NumberConstant(std::numeric_limits<double>::quiet_NaN())) DEFINE_GETTER(EmptyStateValues, graph()->NewNode(common()->StateValues(0, SparseInputMask::Dense()))) DEFINE_GETTER(SingleDeadTypedStateValues, graph()->NewNode(common()->TypedStateValues( new (graph()->zone()->New(sizeof(ZoneVector<MachineType>))) ZoneVector<MachineType>(0, graph()->zone()), SparseInputMask(SparseInputMask::kEndMarker << 1)))) #undef DEFINE_GETTER #undef GET_CACHED_FIELD } // namespace compiler } // namespace internal } // namespace v8