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