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// Copyright 2018 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_MACHINE_GRAPH_H_
#define V8_COMPILER_MACHINE_GRAPH_H_
#include "src/base/compiler-specific.h"
#include "src/common/globals.h"
#include "src/compiler/common-node-cache.h"
#include "src/compiler/common-operator.h"
#include "src/compiler/graph.h"
#include "src/compiler/machine-operator.h"
#include "src/compiler/node-aux-data.h"
#include "src/runtime/runtime.h"
namespace v8 {
namespace internal {
namespace compiler {
// Implements a facade on a Graph, enhancing the graph with machine-specific
// notions, including a builder for common and machine operators, as well
// as caching primitive constants.
class V8_EXPORT_PRIVATE MachineGraph : public NON_EXPORTED_BASE(ZoneObject) {
public:
MachineGraph(Graph* graph, CommonOperatorBuilder* common,
MachineOperatorBuilder* machine)
: graph_(graph),
common_(common),
machine_(machine),
cache_(zone()),
call_counts_(zone()) {}
MachineGraph(const MachineGraph&) = delete;
MachineGraph& operator=(const MachineGraph&) = delete;
// Creates a Int32Constant node, usually canonicalized.
Node* Int32Constant(int32_t value);
Node* Uint32Constant(uint32_t value) {
return Int32Constant(base::bit_cast<int32_t>(value));
}
// Creates a Int64Constant node, usually canonicalized.
Node* Int64Constant(int64_t value);
Node* Uint64Constant(uint64_t value) {
return Int64Constant(base::bit_cast<int64_t>(value));
}
// Creates a Int32Constant/Int64Constant node, depending on the word size of
// the target machine.
// TODO(turbofan): Code using Int32Constant/Int64Constant to store pointer
// constants is probably not serializable.
Node* IntPtrConstant(intptr_t value);
Node* UintPtrConstant(uintptr_t value);
Node* TaggedIndexConstant(intptr_t value);
Node* RelocatableInt32Constant(int32_t value, RelocInfo::Mode rmode);
Node* RelocatableInt64Constant(int64_t value, RelocInfo::Mode rmode);
Node* RelocatableIntPtrConstant(intptr_t value, RelocInfo::Mode rmode);
// Creates a Float32Constant node, usually canonicalized.
Node* Float32Constant(float value);
// Creates a Float64Constant node, usually canonicalized.
Node* Float64Constant(double value);
// Creates a PointerConstant node.
Node* PointerConstant(intptr_t value);
template <typename T>
Node* PointerConstant(T* value) {
return PointerConstant(base::bit_cast<intptr_t>(value));
}
// Creates an ExternalConstant node, usually canonicalized.
Node* ExternalConstant(ExternalReference ref);
Node* ExternalConstant(Runtime::FunctionId function_id);
// Global cache of the dead node.
Node* Dead() {
return Dead_ ? Dead_ : Dead_ = graph_->NewNode(common_->Dead());
}
// Store and retrieve call count information.
void StoreCallCount(NodeId call_id, int count) {
call_counts_.Put(call_id, count);
}
int GetCallCount(NodeId call_id) { return call_counts_.Get(call_id); }
// Use this to keep the number of map rehashings to a minimum.
void ReserveCallCounts(size_t num_call_instructions) {
call_counts_.Reserve(num_call_instructions);
}
CommonOperatorBuilder* common() const { return common_; }
MachineOperatorBuilder* machine() const { return machine_; }
Graph* graph() const { return graph_; }
Zone* zone() const { return graph()->zone(); }
protected:
Graph* graph_;
CommonOperatorBuilder* common_;
MachineOperatorBuilder* machine_;
CommonNodeCache cache_;
NodeAuxDataMap<int, -1> call_counts_;
Node* Dead_ = nullptr;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_MACHINE_GRAPH_H_
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