// Copyright 2014 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_COMPILER_JS_GRAPH_H_
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#define V8_COMPILER_JS_GRAPH_H_
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#include "src/compiler/common-operator.h"
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#include "src/compiler/graph.h"
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#include "src/compiler/js-operator.h"
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#include "src/compiler/machine-graph.h"
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#include "src/compiler/node-properties.h"
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#include "src/globals.h"
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#include "src/isolate.h"
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namespace v8 {
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namespace internal {
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namespace compiler {
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class SimplifiedOperatorBuilder;
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class Typer;
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// Implements a facade on a Graph, enhancing the graph with JS-specific
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// notions, including various builders for operators, canonicalized global
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// constants, and various helper methods.
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class V8_EXPORT_PRIVATE JSGraph : public MachineGraph {
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public:
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JSGraph(Isolate* isolate, Graph* graph, CommonOperatorBuilder* common,
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JSOperatorBuilder* javascript, SimplifiedOperatorBuilder* simplified,
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MachineOperatorBuilder* machine)
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: MachineGraph(graph, common, machine),
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isolate_(isolate),
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javascript_(javascript),
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simplified_(simplified) {
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}
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// CEntryStubs are cached depending on the result size and other flags.
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Node* CEntryStubConstant(int result_size,
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SaveFPRegsMode save_doubles = kDontSaveFPRegs,
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ArgvMode argv_mode = kArgvOnStack,
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bool builtin_exit_frame = false);
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// Used for padding frames. (alias: the hole)
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Node* PaddingConstant() { return TheHoleConstant(); }
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// Used for stubs and runtime functions with no context. (alias: SMI zero)
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Node* NoContextConstant() { return ZeroConstant(); }
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// Creates a HeapConstant node, possibly canonicalized, and may access the
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// heap to inspect the object.
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Node* HeapConstant(Handle<HeapObject> value);
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// Creates a Constant node of the appropriate type for the given object.
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// Accesses the heap to inspect the object and determine whether one of the
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// canonicalized globals or a number constant should be returned.
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Node* Constant(Handle<Object> value);
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// Like above, but doesn't access the heap directly.
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Node* Constant(const ObjectRef& value);
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// Creates a NumberConstant node, usually canonicalized.
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Node* Constant(double value);
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// Creates a NumberConstant node, usually canonicalized.
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Node* Constant(int32_t value);
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// Creates a NumberConstant node, usually canonicalized.
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Node* Constant(uint32_t value);
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// Creates a HeapConstant node for either true or false.
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Node* BooleanConstant(bool is_true) {
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return is_true ? TrueConstant() : FalseConstant();
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}
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Node* SmiConstant(int32_t immediate) {
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DCHECK(Smi::IsValid(immediate));
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return Constant(immediate);
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}
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JSOperatorBuilder* javascript() const { return javascript_; }
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SimplifiedOperatorBuilder* simplified() const { return simplified_; }
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Isolate* isolate() const { return isolate_; }
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Factory* factory() const { return isolate()->factory(); }
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// Adds all the cached nodes to the given list.
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void GetCachedNodes(NodeVector* nodes);
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// Cached global nodes.
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#define CACHED_GLOBAL_LIST(V) \
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V(AllocateInNewSpaceStubConstant) \
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V(AllocateInOldSpaceStubConstant) \
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V(ArrayConstructorStubConstant) \
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V(ToNumberBuiltinConstant) \
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V(EmptyFixedArrayConstant) \
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V(EmptyStringConstant) \
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V(FixedArrayMapConstant) \
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V(PropertyArrayMapConstant) \
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V(FixedDoubleArrayMapConstant) \
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V(HeapNumberMapConstant) \
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V(OptimizedOutConstant) \
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V(StaleRegisterConstant) \
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V(UndefinedConstant) \
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V(TheHoleConstant) \
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V(TrueConstant) \
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V(FalseConstant) \
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V(NullConstant) \
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V(ZeroConstant) \
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V(OneConstant) \
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V(NaNConstant) \
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V(MinusOneConstant) \
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V(EmptyStateValues) \
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V(SingleDeadTypedStateValues)
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// Cached global node accessor methods.
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#define DECLARE_GETTER(name) Node* name();
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CACHED_GLOBAL_LIST(DECLARE_GETTER)
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#undef DECLARE_FIELD
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private:
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Isolate* isolate_;
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JSOperatorBuilder* javascript_;
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SimplifiedOperatorBuilder* simplified_;
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#define CACHED_CENTRY_LIST(V) \
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V(CEntryStub1Constant) \
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V(CEntryStub2Constant) \
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V(CEntryStub3Constant) \
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V(CEntryStub1WithBuiltinExitFrameConstant)
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// Canonicalized global node fields.
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#define DECLARE_FIELD(name) Node* name##_ = nullptr;
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CACHED_GLOBAL_LIST(DECLARE_FIELD)
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CACHED_CENTRY_LIST(DECLARE_FIELD)
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#undef DECLARE_FIELD
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// Internal helper to canonicalize a number constant.
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Node* NumberConstant(double value);
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DISALLOW_COPY_AND_ASSIGN(JSGraph);
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};
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} // namespace compiler
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} // namespace internal
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} // namespace v8
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#endif // V8_COMPILER_JS_GRAPH_H_
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