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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/js-graph.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node.h"
#include "src/compiler/simplified-operator.h"
namespace v8 {
namespace internal {
namespace compiler {
// Forward declarations.
class RepresentationChanger;
class SourcePositionTable;
class SimplifiedLowering FINAL {
public:
SimplifiedLowering(JSGraph* jsgraph, Zone* zone,
SourcePositionTable* source_positions)
: jsgraph_(jsgraph), zone_(zone), source_positions_(source_positions) {}
~SimplifiedLowering() {}
void LowerAllNodes();
// TODO(titzer): These are exposed for direct testing. Use a friend class.
void DoLoadField(Node* node);
void DoStoreField(Node* node);
// TODO(turbofan): The output_type can be removed once the result of the
// representation analysis is stored in the node bounds.
void DoLoadBuffer(Node* node, MachineType output_type,
RepresentationChanger* changer);
void DoStoreBuffer(Node* node);
void DoLoadElement(Node* node);
void DoStoreElement(Node* node);
void DoStringAdd(Node* node);
void DoStringEqual(Node* node);
void DoStringLessThan(Node* node);
void DoStringLessThanOrEqual(Node* node);
private:
JSGraph* const jsgraph_;
Zone* const zone_;
// TODO(danno): SimplifiedLowering shouldn't know anything about the source
// positions table, but must for now since there currently is no other way to
// pass down source position information to nodes created during
// lowering. Once this phase becomes a vanilla reducer, it should get source
// position information via the SourcePositionWrapper like all other reducers.
SourcePositionTable* source_positions_;
Node* SmiTag(Node* node);
Node* IsTagged(Node* node);
Node* Untag(Node* node);
Node* OffsetMinusTagConstant(int32_t offset);
Node* ComputeIndex(const ElementAccess& access, Node* const key);
Node* StringComparison(Node* node, bool requires_ordering);
Node* Int32Div(Node* const node);
Node* Int32Mod(Node* const node);
Node* Uint32Div(Node* const node);
Node* Uint32Mod(Node* const node);
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 jsgraph()->machine(); }
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_SIMPLIFIED_LOWERING_H_
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