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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_GENERIC_LOWERING_H_
#define V8_COMPILER_JS_GENERIC_LOWERING_H_
#include "src/v8.h"
#include "src/allocation.h"
#include "src/compiler/graph.h"
#include "src/compiler/js-graph.h"
#include "src/compiler/lowering-builder.h"
#include "src/compiler/opcodes.h"
#include "src/unique.h"
namespace v8 {
namespace internal {
// Forward declarations.
class HydrogenCodeStub;
namespace compiler {
// Forward declarations.
class CommonOperatorBuilder;
class MachineOperatorBuilder;
class Linkage;
// Lowers JS-level operators to runtime and IC calls in the "generic" case.
class JSGenericLowering : public LoweringBuilder {
public:
JSGenericLowering(CompilationInfo* info, JSGraph* graph,
MachineOperatorBuilder* machine,
SourcePositionTable* source_positions);
virtual ~JSGenericLowering() {}
virtual void Lower(Node* node);
protected:
// Dispatched depending on opcode.
#define DECLARE_LOWER(x) Node* Lower##x(Node* node);
ALL_OP_LIST(DECLARE_LOWER)
#undef DECLARE_LOWER
// Helpers to create new constant nodes.
Node* SmiConstant(int immediate);
Node* Int32Constant(int immediate);
Node* CodeConstant(Handle<Code> code);
Node* FunctionConstant(Handle<JSFunction> function);
Node* ExternalConstant(ExternalReference ref);
// Helpers to patch existing nodes in the graph.
void PatchOperator(Node* node, Operator* new_op);
void PatchInsertInput(Node* node, int index, Node* input);
// Helpers to replace existing nodes with a generic call.
void ReplaceWithCompareIC(Node* node, Token::Value token, bool pure);
void ReplaceWithICStubCall(Node* node, HydrogenCodeStub* stub);
void ReplaceWithBuiltinCall(Node* node, Builtins::JavaScript id, int args);
void ReplaceWithRuntimeCall(Node* node, Runtime::FunctionId f, int args = -1);
Zone* zone() const { return graph()->zone(); }
Isolate* isolate() const { return zone()->isolate(); }
JSGraph* jsgraph() const { return jsgraph_; }
Graph* graph() const { return jsgraph()->graph(); }
Linkage* linkage() const { return linkage_; }
CompilationInfo* info() const { return info_; }
CommonOperatorBuilder* common() const { return jsgraph()->common(); }
MachineOperatorBuilder* machine() const { return machine_; }
private:
CompilationInfo* info_;
JSGraph* jsgraph_;
Linkage* linkage_;
MachineOperatorBuilder* machine_;
SetOncePointer<Node> centrystub_constant_;
};
}
}
} // namespace v8::internal::compiler
#endif // V8_COMPILER_JS_GENERIC_LOWERING_H_
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