| // 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: |
| 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: |
| 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_ |