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// Copyright 2022 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_TURBOSHAFT_DEOPT_DATA_H_
#define V8_COMPILER_TURBOSHAFT_DEOPT_DATA_H_
#include "src/base/small-vector.h"
#include "src/common/globals.h"
#include "src/compiler/turboshaft/operations.h"
namespace v8::internal::compiler::turboshaft {
struct FrameStateData {
// The data is encoded as a pre-traversal of a tree.
enum class Instr : uint8_t {
kInput, // 1 Operand: input machine type
kUnusedRegister,
kDematerializedObject, // 2 Operands: id, field_count
kDematerializedObjectReference, // 1 Operand: id
kArgumentsElements, // 1 Operand: type
kArgumentsLength,
};
class Builder {
public:
void AddParentFrameState(OpIndex parent) {
DCHECK(inputs_.empty());
inlined_ = true;
inputs_.push_back(parent);
}
void AddInput(MachineType type, OpIndex input) {
instructions_.push_back(Instr::kInput);
machine_types_.push_back(type);
inputs_.push_back(input);
}
void AddUnusedRegister() {
instructions_.push_back(Instr::kUnusedRegister);
}
void AddDematerializedObjectReference(uint32_t id) {
instructions_.push_back(Instr::kDematerializedObjectReference);
int_operands_.push_back(id);
}
void AddDematerializedObject(uint32_t id, uint32_t field_count) {
instructions_.push_back(Instr::kDematerializedObject);
int_operands_.push_back(id);
int_operands_.push_back(field_count);
}
void AddArgumentsElements(CreateArgumentsType type) {
instructions_.push_back(Instr::kArgumentsElements);
int_operands_.push_back(static_cast<int>(type));
}
void AddArgumentsLength() {
instructions_.push_back(Instr::kArgumentsLength);
}
const FrameStateData* AllocateFrameStateData(
const FrameStateInfo& frame_state_info, Zone* zone) {
return zone->New<FrameStateData>(FrameStateData{
frame_state_info, zone->CloneVector(base::VectorOf(instructions_)),
zone->CloneVector(base::VectorOf(machine_types_)),
zone->CloneVector(base::VectorOf(int_operands_))});
}
base::Vector<const OpIndex> Inputs() { return base::VectorOf(inputs_); }
bool inlined() const { return inlined_; }
private:
base::SmallVector<Instr, 32> instructions_;
base::SmallVector<MachineType, 32> machine_types_;
base::SmallVector<uint32_t, 16> int_operands_;
base::SmallVector<OpIndex, 32> inputs_;
bool inlined_ = false;
};
struct Iterator {
base::Vector<const Instr> instructions;
base::Vector<const MachineType> machine_types;
base::Vector<const uint32_t> int_operands;
base::Vector<const OpIndex> inputs;
bool has_more() const { return !instructions.empty(); }
Instr current_instr() { return instructions[0]; }
void ConsumeInput(MachineType* machine_type, OpIndex* input) {
DCHECK_EQ(instructions[0], Instr::kInput);
instructions += 1;
*machine_type = machine_types[0];
machine_types += 1;
*input = inputs[0];
inputs += 1;
}
void ConsumeUnusedRegister() {
DCHECK_EQ(instructions[0], Instr::kUnusedRegister);
instructions += 1;
}
void ConsumeDematerializedObject(uint32_t* id, uint32_t* field_count) {
DCHECK_EQ(instructions[0], Instr::kDematerializedObject);
instructions += 1;
*id = int_operands[0];
*field_count = int_operands[1];
int_operands += 2;
}
void ConsumeDematerializedObjectReference(uint32_t* id) {
DCHECK_EQ(instructions[0], Instr::kDematerializedObjectReference);
instructions += 1;
*id = int_operands[0];
int_operands += 1;
}
void ConsumeArgumentsElements(CreateArgumentsType* type) {
DCHECK_EQ(instructions[0], Instr::kArgumentsElements);
instructions += 1;
*type = static_cast<CreateArgumentsType>(int_operands[0]);
int_operands += 1;
}
void ConsumeArgumentsLength() {
DCHECK_EQ(instructions[0], Instr::kArgumentsLength);
instructions += 1;
}
};
Iterator iterator(base::Vector<const OpIndex> state_values) const {
return Iterator{instructions, machine_types, int_operands, state_values};
}
const FrameStateInfo& frame_state_info;
base::Vector<Instr> instructions;
base::Vector<MachineType> machine_types;
base::Vector<uint32_t> int_operands;
};
} // namespace v8::internal::compiler::turboshaft
#endif // V8_COMPILER_TURBOSHAFT_DEOPT_DATA_H_
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