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