Land the Fan (disabled)

src/compiler/js-generic-lowering.h

+// 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_