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// Copyright 2016 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_SIMD_SCALAR_LOWERING_H_
#define V8_COMPILER_SIMD_SCALAR_LOWERING_H_
#include "src/compiler/common-operator.h"
#include "src/compiler/graph.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node-marker.h"
#include "src/zone/zone-containers.h"
namespace v8 {
namespace internal {
namespace compiler {
class SimdScalarLowering {
public:
SimdScalarLowering(Graph* graph, MachineOperatorBuilder* machine,
CommonOperatorBuilder* common, Zone* zone,
Signature<MachineRepresentation>* signature);
void LowerGraph();
int GetParameterCountAfterLowering();
private:
enum class State : uint8_t { kUnvisited, kOnStack, kVisited };
enum class SimdType : uint8_t { kInt32, kFloat32 };
static const int kMaxLanes = 4;
struct Replacement {
Node* node[kMaxLanes];
SimdType type; // represents what input type is expected
};
Zone* zone() const { return zone_; }
Graph* graph() const { return graph_; }
MachineOperatorBuilder* machine() const { return machine_; }
CommonOperatorBuilder* common() const { return common_; }
Signature<MachineRepresentation>* signature() const { return signature_; }
void LowerNode(Node* node);
bool DefaultLowering(Node* node);
void ReplaceNode(Node* old, Node** new_nodes);
bool HasReplacement(size_t index, Node* node);
Node** GetReplacements(Node* node);
Node** GetReplacementsWithType(Node* node, SimdType type);
SimdType ReplacementType(Node* node);
void PreparePhiReplacement(Node* phi);
void SetLoweredType(Node* node, Node* output);
struct NodeState {
Node* node;
int input_index;
};
Zone* zone_;
Graph* const graph_;
MachineOperatorBuilder* machine_;
CommonOperatorBuilder* common_;
NodeMarker<State> state_;
ZoneDeque<NodeState> stack_;
Replacement* replacements_;
Signature<MachineRepresentation>* signature_;
Node* placeholder_;
int parameter_count_after_lowering_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_SIMD_SCALAR_LOWERING_H_
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