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/*
* Copyright (C) 2016 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_OPTIMIZING_NODES_MIPS_H_
#define ART_COMPILER_OPTIMIZING_NODES_MIPS_H_
namespace art {
// Compute the address of the method for MIPS Constant area support.
class HMipsComputeBaseMethodAddress : public HExpression<0> {
public:
// Treat the value as an int32_t, but it is really a 32 bit native pointer.
HMipsComputeBaseMethodAddress()
: HExpression(kMipsComputeBaseMethodAddress,
DataType::Type::kInt32,
SideEffects::None(),
kNoDexPc) {
}
bool CanBeMoved() const override { return true; }
DECLARE_INSTRUCTION(MipsComputeBaseMethodAddress);
protected:
DEFAULT_COPY_CONSTRUCTOR(MipsComputeBaseMethodAddress);
};
// Mips version of HPackedSwitch that holds a pointer to the base method address.
class HMipsPackedSwitch final : public HExpression<2> {
public:
HMipsPackedSwitch(int32_t start_value,
int32_t num_entries,
HInstruction* input,
HMipsComputeBaseMethodAddress* method_base,
uint32_t dex_pc)
: HExpression(kMipsPackedSwitch, SideEffects::None(), dex_pc),
start_value_(start_value),
num_entries_(num_entries) {
SetRawInputAt(0, input);
SetRawInputAt(1, method_base);
}
bool IsControlFlow() const override { return true; }
int32_t GetStartValue() const { return start_value_; }
int32_t GetNumEntries() const { return num_entries_; }
HBasicBlock* GetDefaultBlock() const {
// Last entry is the default block.
return GetBlock()->GetSuccessors()[num_entries_];
}
DECLARE_INSTRUCTION(MipsPackedSwitch);
protected:
DEFAULT_COPY_CONSTRUCTOR(MipsPackedSwitch);
private:
const int32_t start_value_;
const int32_t num_entries_;
};
// This instruction computes part of the array access offset (index offset).
//
// For array accesses the element address has the following structure:
// Address = CONST_OFFSET + base_addr + index << ELEM_SHIFT. The address part
// (index << ELEM_SHIFT) can be shared across array accesses with
// the same data type and index. For example, in the following loop 5 accesses can share address
// computation:
//
// void foo(int[] a, int[] b, int[] c) {
// for (i...) {
// a[i] = a[i] + 5;
// b[i] = b[i] + c[i];
// }
// }
//
// Note: as the instruction doesn't involve base array address into computations it has no side
// effects.
class HIntermediateArrayAddressIndex final : public HExpression<2> {
public:
HIntermediateArrayAddressIndex(HInstruction* index, HInstruction* shift, uint32_t dex_pc)
: HExpression(kIntermediateArrayAddressIndex,
DataType::Type::kInt32,
SideEffects::None(),
dex_pc) {
SetRawInputAt(0, index);
SetRawInputAt(1, shift);
}
bool CanBeMoved() const override { return true; }
bool InstructionDataEquals(const HInstruction* other ATTRIBUTE_UNUSED) const override {
return true;
}
bool IsActualObject() const override { return false; }
HInstruction* GetIndex() const { return InputAt(0); }
HInstruction* GetShift() const { return InputAt(1); }
DECLARE_INSTRUCTION(IntermediateArrayAddressIndex);
protected:
DEFAULT_COPY_CONSTRUCTOR(IntermediateArrayAddressIndex);
};
} // namespace art
#endif // ART_COMPILER_OPTIMIZING_NODES_MIPS_H_
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