upload android base code part3
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274
android/art/compiler/optimizing/nodes_shared.h
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274
android/art/compiler/optimizing/nodes_shared.h
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/*
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* Copyright (C) 2015 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef ART_COMPILER_OPTIMIZING_NODES_SHARED_H_
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#define ART_COMPILER_OPTIMIZING_NODES_SHARED_H_
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// This `#include` should never be used by compilation, as this file (`nodes_shared.h`) is included
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// in `nodes.h`. However it helps editing tools (e.g. YouCompleteMe) by giving them better context
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// (defining `HInstruction` and co).
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#include "nodes.h"
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namespace art {
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class HMultiplyAccumulate FINAL : public HExpression<3> {
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public:
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HMultiplyAccumulate(Primitive::Type type,
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InstructionKind op,
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HInstruction* accumulator,
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HInstruction* mul_left,
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HInstruction* mul_right,
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uint32_t dex_pc = kNoDexPc)
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: HExpression(type, SideEffects::None(), dex_pc), op_kind_(op) {
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SetRawInputAt(kInputAccumulatorIndex, accumulator);
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SetRawInputAt(kInputMulLeftIndex, mul_left);
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SetRawInputAt(kInputMulRightIndex, mul_right);
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}
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static constexpr int kInputAccumulatorIndex = 0;
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static constexpr int kInputMulLeftIndex = 1;
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static constexpr int kInputMulRightIndex = 2;
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bool CanBeMoved() const OVERRIDE { return true; }
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bool InstructionDataEquals(const HInstruction* other) const OVERRIDE {
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return op_kind_ == other->AsMultiplyAccumulate()->op_kind_;
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}
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InstructionKind GetOpKind() const { return op_kind_; }
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DECLARE_INSTRUCTION(MultiplyAccumulate);
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private:
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// Indicates if this is a MADD or MSUB.
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const InstructionKind op_kind_;
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DISALLOW_COPY_AND_ASSIGN(HMultiplyAccumulate);
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};
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class HBitwiseNegatedRight FINAL : public HBinaryOperation {
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public:
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HBitwiseNegatedRight(Primitive::Type result_type,
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InstructionKind op,
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HInstruction* left,
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HInstruction* right,
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uint32_t dex_pc = kNoDexPc)
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: HBinaryOperation(result_type, left, right, SideEffects::None(), dex_pc),
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op_kind_(op) {
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DCHECK(op == HInstruction::kAnd || op == HInstruction::kOr || op == HInstruction::kXor) << op;
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}
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template <typename T, typename U>
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auto Compute(T x, U y) const -> decltype(x & ~y) {
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static_assert(std::is_same<decltype(x & ~y), decltype(x | ~y)>::value &&
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std::is_same<decltype(x & ~y), decltype(x ^ ~y)>::value,
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"Inconsistent negated bitwise types");
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switch (op_kind_) {
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case HInstruction::kAnd:
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return x & ~y;
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case HInstruction::kOr:
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return x | ~y;
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case HInstruction::kXor:
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return x ^ ~y;
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default:
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LOG(FATAL) << "Unreachable";
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UNREACHABLE();
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}
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}
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HConstant* Evaluate(HIntConstant* x, HIntConstant* y) const OVERRIDE {
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return GetBlock()->GetGraph()->GetIntConstant(
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Compute(x->GetValue(), y->GetValue()), GetDexPc());
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}
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HConstant* Evaluate(HLongConstant* x, HLongConstant* y) const OVERRIDE {
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return GetBlock()->GetGraph()->GetLongConstant(
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Compute(x->GetValue(), y->GetValue()), GetDexPc());
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}
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HConstant* Evaluate(HFloatConstant* x ATTRIBUTE_UNUSED,
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HFloatConstant* y ATTRIBUTE_UNUSED) const OVERRIDE {
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LOG(FATAL) << DebugName() << " is not defined for float values";
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UNREACHABLE();
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}
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HConstant* Evaluate(HDoubleConstant* x ATTRIBUTE_UNUSED,
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HDoubleConstant* y ATTRIBUTE_UNUSED) const OVERRIDE {
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LOG(FATAL) << DebugName() << " is not defined for double values";
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UNREACHABLE();
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}
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InstructionKind GetOpKind() const { return op_kind_; }
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DECLARE_INSTRUCTION(BitwiseNegatedRight);
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private:
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// Specifies the bitwise operation, which will be then negated.
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const InstructionKind op_kind_;
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DISALLOW_COPY_AND_ASSIGN(HBitwiseNegatedRight);
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};
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// This instruction computes an intermediate address pointing in the 'middle' of an object. The
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// result pointer cannot be handled by GC, so extra care is taken to make sure that this value is
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// never used across anything that can trigger GC.
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// The result of this instruction is not a pointer in the sense of `Primitive::kPrimNot`. So we
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// represent it by the type `Primitive::kPrimInt`.
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class HIntermediateAddress FINAL : public HExpression<2> {
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public:
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HIntermediateAddress(HInstruction* base_address, HInstruction* offset, uint32_t dex_pc)
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: HExpression(Primitive::kPrimInt, SideEffects::DependsOnGC(), dex_pc) {
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DCHECK_EQ(Primitive::ComponentSize(Primitive::kPrimInt),
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Primitive::ComponentSize(Primitive::kPrimNot))
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<< "kPrimInt and kPrimNot have different sizes.";
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SetRawInputAt(0, base_address);
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SetRawInputAt(1, offset);
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}
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bool CanBeMoved() const OVERRIDE { return true; }
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bool InstructionDataEquals(const HInstruction* other ATTRIBUTE_UNUSED) const OVERRIDE {
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return true;
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}
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bool IsActualObject() const OVERRIDE { return false; }
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HInstruction* GetBaseAddress() const { return InputAt(0); }
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HInstruction* GetOffset() const { return InputAt(1); }
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DECLARE_INSTRUCTION(IntermediateAddress);
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private:
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DISALLOW_COPY_AND_ASSIGN(HIntermediateAddress);
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};
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// This instruction computes part of the array access offset (data and index offset).
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//
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// For array accesses the element address has the following structure:
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// Address = CONST_OFFSET + base_addr + index << ELEM_SHIFT. Taking into account LDR/STR addressing
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// modes address part (CONST_OFFSET + index << ELEM_SHIFT) can be shared across array access with
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// the same data type and index. For example, for the following loop 5 accesses can share address
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// computation:
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//
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// void foo(int[] a, int[] b, int[] c) {
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// for (i...) {
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// a[i] = a[i] + 5;
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// b[i] = b[i] + c[i];
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// }
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// }
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//
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// Note: as the instruction doesn't involve base array address into computations it has no side
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// effects (in comparison of HIntermediateAddress).
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class HIntermediateAddressIndex FINAL : public HExpression<3> {
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public:
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HIntermediateAddressIndex(
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HInstruction* index, HInstruction* offset, HInstruction* shift, uint32_t dex_pc)
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: HExpression(Primitive::kPrimInt, SideEffects::None(), dex_pc) {
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SetRawInputAt(0, index);
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SetRawInputAt(1, offset);
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SetRawInputAt(2, shift);
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}
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bool CanBeMoved() const OVERRIDE { return true; }
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bool InstructionDataEquals(const HInstruction* other ATTRIBUTE_UNUSED) const OVERRIDE {
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return true;
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}
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bool IsActualObject() const OVERRIDE { return false; }
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HInstruction* GetIndex() const { return InputAt(0); }
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HInstruction* GetOffset() const { return InputAt(1); }
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HInstruction* GetShift() const { return InputAt(2); }
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DECLARE_INSTRUCTION(IntermediateAddressIndex);
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private:
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DISALLOW_COPY_AND_ASSIGN(HIntermediateAddressIndex);
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};
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class HDataProcWithShifterOp FINAL : public HExpression<2> {
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public:
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enum OpKind {
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kLSL, // Logical shift left.
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kLSR, // Logical shift right.
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kASR, // Arithmetic shift right.
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kUXTB, // Unsigned extend byte.
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kUXTH, // Unsigned extend half-word.
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kUXTW, // Unsigned extend word.
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kSXTB, // Signed extend byte.
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kSXTH, // Signed extend half-word.
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kSXTW, // Signed extend word.
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// Aliases.
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kFirstShiftOp = kLSL,
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kLastShiftOp = kASR,
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kFirstExtensionOp = kUXTB,
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kLastExtensionOp = kSXTW
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};
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HDataProcWithShifterOp(HInstruction* instr,
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HInstruction* left,
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HInstruction* right,
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OpKind op,
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// The shift argument is unused if the operation
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// is an extension.
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int shift = 0,
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uint32_t dex_pc = kNoDexPc)
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: HExpression(instr->GetType(), SideEffects::None(), dex_pc),
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instr_kind_(instr->GetKind()), op_kind_(op),
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shift_amount_(shift & (instr->GetType() == Primitive::kPrimInt
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? kMaxIntShiftDistance
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: kMaxLongShiftDistance)) {
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DCHECK(!instr->HasSideEffects());
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SetRawInputAt(0, left);
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SetRawInputAt(1, right);
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}
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bool CanBeMoved() const OVERRIDE { return true; }
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bool InstructionDataEquals(const HInstruction* other_instr) const OVERRIDE {
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const HDataProcWithShifterOp* other = other_instr->AsDataProcWithShifterOp();
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return instr_kind_ == other->instr_kind_ &&
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op_kind_ == other->op_kind_ &&
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shift_amount_ == other->shift_amount_;
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}
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static bool IsShiftOp(OpKind op_kind) {
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return kFirstShiftOp <= op_kind && op_kind <= kLastShiftOp;
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}
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static bool IsExtensionOp(OpKind op_kind) {
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return kFirstExtensionOp <= op_kind && op_kind <= kLastExtensionOp;
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}
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// Find the operation kind and shift amount from a bitfield move instruction.
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static void GetOpInfoFromInstruction(HInstruction* bitfield_op,
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/*out*/OpKind* op_kind,
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/*out*/int* shift_amount);
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InstructionKind GetInstrKind() const { return instr_kind_; }
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OpKind GetOpKind() const { return op_kind_; }
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int GetShiftAmount() const { return shift_amount_; }
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DECLARE_INSTRUCTION(DataProcWithShifterOp);
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private:
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InstructionKind instr_kind_;
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OpKind op_kind_;
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int shift_amount_;
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friend std::ostream& operator<<(std::ostream& os, OpKind op);
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DISALLOW_COPY_AND_ASSIGN(HDataProcWithShifterOp);
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};
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std::ostream& operator<<(std::ostream& os, const HDataProcWithShifterOp::OpKind op);
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} // namespace art
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#endif // ART_COMPILER_OPTIMIZING_NODES_SHARED_H_
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