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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_SIMPLIFIED_LOWERING_H_
#define V8_COMPILER_SIMPLIFIED_LOWERING_H_
#include "src/compiler/graph-reducer.h"
#include "src/compiler/js-graph.h"
#include "src/compiler/lowering-builder.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node.h"
#include "src/compiler/simplified-operator.h"
namespace v8 {
namespace internal {
namespace compiler {
class SimplifiedLowering : public LoweringBuilder {
public:
explicit SimplifiedLowering(JSGraph* jsgraph,
SourcePositionTable* source_positions)
: LoweringBuilder(jsgraph->graph(), source_positions),
jsgraph_(jsgraph),
machine_(jsgraph->zone()) {}
virtual ~SimplifiedLowering() {}
void LowerAllNodes();
virtual void Lower(Node* node);
void LowerChange(Node* node, Node* effect, Node* control);
// TODO(titzer): These are exposed for direct testing. Use a friend class.
void DoLoadField(Node* node);
void DoStoreField(Node* node);
void DoLoadElement(Node* node);
void DoStoreElement(Node* node);
private:
JSGraph* jsgraph_;
MachineOperatorBuilder machine_;
Node* SmiTag(Node* node);
Node* IsTagged(Node* node);
Node* Untag(Node* node);
Node* OffsetMinusTagConstant(int32_t offset);
Node* ComputeIndex(const ElementAccess& access, Node* index);
void DoChangeTaggedToUI32(Node* node, Node* effect, Node* control,
bool is_signed);
void DoChangeUI32ToTagged(Node* node, Node* effect, Node* control,
bool is_signed);
void DoChangeTaggedToFloat64(Node* node, Node* effect, Node* control);
void DoChangeFloat64ToTagged(Node* node, Node* effect, Node* control);
void DoChangeBoolToBit(Node* node, Node* effect, Node* control);
void DoChangeBitToBool(Node* node, Node* effect, Node* control);
friend class RepresentationSelector;
Zone* zone() { return jsgraph_->zone(); }
JSGraph* jsgraph() { return jsgraph_; }
Graph* graph() { return jsgraph()->graph(); }
CommonOperatorBuilder* common() { return jsgraph()->common(); }
MachineOperatorBuilder* machine() { return &machine_; }
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_SIMPLIFIED_LOWERING_H_
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