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// Copyright 2020 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_BACKEND_REGISTER_ALLOCATION_H_
#define V8_COMPILER_BACKEND_REGISTER_ALLOCATION_H_
#include "src/codegen/register-configuration.h"
#include "src/zone/zone.h"
namespace v8 {
namespace internal {
namespace compiler {
enum class RegisterKind { kGeneral, kDouble };
inline int GetRegisterCount(const RegisterConfiguration* config,
RegisterKind kind) {
switch (kind) {
case RegisterKind::kGeneral:
return config->num_general_registers();
case RegisterKind::kDouble:
return config->num_double_registers();
}
}
inline int GetAllocatableRegisterCount(const RegisterConfiguration* config,
RegisterKind kind) {
switch (kind) {
case RegisterKind::kGeneral:
return config->num_allocatable_general_registers();
case RegisterKind::kDouble:
return config->num_allocatable_double_registers();
}
}
inline const int* GetAllocatableRegisterCodes(
const RegisterConfiguration* config, RegisterKind kind) {
switch (kind) {
case RegisterKind::kGeneral:
return config->allocatable_general_codes();
case RegisterKind::kDouble:
return config->allocatable_double_codes();
}
}
inline int ByteWidthForStackSlot(MachineRepresentation rep) {
switch (rep) {
case MachineRepresentation::kBit:
case MachineRepresentation::kWord8:
case MachineRepresentation::kWord16:
case MachineRepresentation::kWord32:
case MachineRepresentation::kFloat32:
case MachineRepresentation::kCagedPointer:
return kSystemPointerSize;
case MachineRepresentation::kTaggedSigned:
case MachineRepresentation::kTaggedPointer:
case MachineRepresentation::kTagged:
case MachineRepresentation::kCompressedPointer:
case MachineRepresentation::kCompressed:
// TODO(ishell): kTaggedSize once half size locations are supported.
return kSystemPointerSize;
case MachineRepresentation::kWord64:
case MachineRepresentation::kFloat64:
return kDoubleSize;
case MachineRepresentation::kSimd128:
return kSimd128Size;
case MachineRepresentation::kNone:
case MachineRepresentation::kMapWord:
break;
}
UNREACHABLE();
}
class RegisterAllocationData : public ZoneObject {
public:
enum Type {
kTopTier,
kMidTier,
};
Type type() const { return type_; }
protected:
explicit RegisterAllocationData(Type type) : type_(type) {}
private:
Type type_;
};
} // namespace compiler
} // namespace internal
} // namespace v8
#endif // V8_COMPILER_BACKEND_REGISTER_ALLOCATION_H_
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