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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef ART_COMPILER_UTILS_MANAGED_REGISTER_H_
#define ART_COMPILER_UTILS_MANAGED_REGISTER_H_
#include <type_traits>
#include <vector>
#include "base/value_object.h"
namespace art {
namespace arm {
class ArmManagedRegister;
} // namespace arm
namespace arm64 {
class Arm64ManagedRegister;
} // namespace arm64
namespace mips {
class MipsManagedRegister;
} // namespace mips
namespace mips64 {
class Mips64ManagedRegister;
} // namespace mips64
namespace x86 {
class X86ManagedRegister;
} // namespace x86
namespace x86_64 {
class X86_64ManagedRegister;
} // namespace x86_64
class ManagedRegister : public ValueObject {
public:
// ManagedRegister is a value class. There exists no method to change the
// internal state. We therefore allow a copy constructor and an
// assignment-operator.
constexpr ManagedRegister(const ManagedRegister& other) = default;
ManagedRegister& operator=(const ManagedRegister& other) = default;
constexpr arm::ArmManagedRegister AsArm() const;
constexpr arm64::Arm64ManagedRegister AsArm64() const;
constexpr mips::MipsManagedRegister AsMips() const;
constexpr mips64::Mips64ManagedRegister AsMips64() const;
constexpr x86::X86ManagedRegister AsX86() const;
constexpr x86_64::X86_64ManagedRegister AsX86_64() const;
// It is valid to invoke Equals on and with a NoRegister.
constexpr bool Equals(const ManagedRegister& other) const {
return id_ == other.id_;
}
constexpr bool IsRegister() const {
return id_ != kNoRegister;
}
constexpr bool IsNoRegister() const {
return id_ == kNoRegister;
}
static constexpr ManagedRegister NoRegister() {
return ManagedRegister();
}
constexpr int RegId() const { return id_; }
explicit constexpr ManagedRegister(int reg_id) : id_(reg_id) { }
protected:
static const int kNoRegister = -1;
constexpr ManagedRegister() : id_(kNoRegister) { }
int id_;
};
static_assert(std::is_trivially_copyable<ManagedRegister>::value,
"ManagedRegister should be trivially copyable");
class ManagedRegisterSpill : public ManagedRegister {
public:
// ManagedRegisterSpill contains information about data type size and location in caller frame
// These additional attributes could be defined by calling convention (EntrySpills)
ManagedRegisterSpill(const ManagedRegister& other, uint32_t size, uint32_t spill_offset)
: ManagedRegister(other), size_(size), spill_offset_(spill_offset) { }
explicit ManagedRegisterSpill(const ManagedRegister& other)
: ManagedRegister(other), size_(-1), spill_offset_(-1) { }
ManagedRegisterSpill(const ManagedRegister& other, int32_t size)
: ManagedRegister(other), size_(size), spill_offset_(-1) { }
int32_t getSpillOffset() const {
return spill_offset_;
}
int32_t getSize() const {
return size_;
}
private:
int32_t size_;
int32_t spill_offset_;
};
class ManagedRegisterEntrySpills : public std::vector<ManagedRegisterSpill> {
public:
// The ManagedRegister does not have information about size and offset.
// In this case it's size and offset determined by BuildFrame (assembler)
void push_back(ManagedRegister x) {
ManagedRegisterSpill spill(x);
std::vector<ManagedRegisterSpill>::push_back(spill);
}
void push_back(ManagedRegister x, int32_t size) {
ManagedRegisterSpill spill(x, size);
std::vector<ManagedRegisterSpill>::push_back(spill);
}
void push_back(ManagedRegisterSpill x) {
std::vector<ManagedRegisterSpill>::push_back(x);
}
private:
};
} // namespace art
#endif // ART_COMPILER_UTILS_MANAGED_REGISTER_H_
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