1c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot//===- llvm/Target/TargetInstrInfo.h - Instruction Info ---------*- C++ -*-===// 2c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot// 3c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot// The LLVM Compiler Infrastructure 4c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot// 5c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot// This file is distributed under the University of Illinois Open Source 6c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot// License. See LICENSE.TXT for details. 7c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot// 8c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot//===----------------------------------------------------------------------===// 9c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot// 10c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot// This file describes the target machine instruction set to the code generator. 11c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot// 12c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot//===----------------------------------------------------------------------===// 13c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 14c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#ifndef LLVM_TARGET_TARGETINSTRINFO_H 15c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#define LLVM_TARGET_TARGETINSTRINFO_H 16c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 17c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/ADT/ArrayRef.h" 18c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/ADT/DenseMap.h" 19c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/ADT/DenseMapInfo.h" 20c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/ADT/None.h" 21c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/CodeGen/LiveIntervalAnalysis.h" 22c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/CodeGen/MachineBasicBlock.h" 23c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/CodeGen/MachineCombinerPattern.h" 24c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/CodeGen/MachineFunction.h" 25c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/CodeGen/MachineInstr.h" 26c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/CodeGen/MachineLoopInfo.h" 27c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/CodeGen/MachineOperand.h" 28c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/CodeGen/PseudoSourceValue.h" 29c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/MC/MCInstrInfo.h" 30c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/Support/BranchProbability.h" 31c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include "llvm/Support/ErrorHandling.h" 32c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include <cassert> 33c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include <cstddef> 34c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include <cstdint> 35c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include <utility> 36c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#include <vector> 37c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 38c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotnamespace llvm { 39c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 40c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass DFAPacketizer; 41c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass InstrItineraryData; 42c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass LiveVariables; 43c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass MachineMemOperand; 44c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass MachineRegisterInfo; 45c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass MCAsmInfo; 46c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass MCInst; 47c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotstruct MCSchedModel; 48c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass Module; 49c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass ScheduleDAG; 50c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass ScheduleHazardRecognizer; 51c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass SDNode; 52c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass SelectionDAG; 53c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass RegScavenger; 54c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass TargetRegisterClass; 55c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass TargetRegisterInfo; 56c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass TargetSchedModel; 57c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass TargetSubtargetInfo; 58c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 59c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robottemplate <class T> class SmallVectorImpl; 60c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 61c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot//--------------------------------------------------------------------------- 62c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot/// 63c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot/// TargetInstrInfo - Interface to description of machine instruction set 64c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot/// 65c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotclass TargetInstrInfo : public MCInstrInfo { 66c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotpublic: 67c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot TargetInstrInfo(unsigned CFSetupOpcode = ~0u, unsigned CFDestroyOpcode = ~0u, 68c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned CatchRetOpcode = ~0u, unsigned ReturnOpcode = ~0u) 69c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot : CallFrameSetupOpcode(CFSetupOpcode), 70c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot CallFrameDestroyOpcode(CFDestroyOpcode), CatchRetOpcode(CatchRetOpcode), 71c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot ReturnOpcode(ReturnOpcode) {} 72c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot TargetInstrInfo(const TargetInstrInfo &) = delete; 73c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot TargetInstrInfo &operator=(const TargetInstrInfo &) = delete; 74c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual ~TargetInstrInfo(); 75c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 76c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot static bool isGenericOpcode(unsigned Opc) { 77c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return Opc <= TargetOpcode::GENERIC_OP_END; 78c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 79c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 80c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Given a machine instruction descriptor, returns the register 81c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// class constraint for OpNum, or NULL. 82c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterClass *getRegClass(const MCInstrDesc &TID, unsigned OpNum, 83c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterInfo *TRI, 84c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineFunction &MF) const; 85c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 86c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if the instruction is trivially rematerializable, meaning it 87c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// has no side effects and requires no operands that aren't always available. 88c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This means the only allowed uses are constants and unallocatable physical 89c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// registers so that the instructions result is independent of the place 90c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// in the function. 91c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool isTriviallyReMaterializable(const MachineInstr &MI, 92c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot AliasAnalysis *AA = nullptr) const { 93c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return MI.getOpcode() == TargetOpcode::IMPLICIT_DEF || 94c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot (MI.getDesc().isRematerializable() && 95c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot (isReallyTriviallyReMaterializable(MI, AA) || 96c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot isReallyTriviallyReMaterializableGeneric(MI, AA))); 97c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 98c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 99c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotprotected: 100c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// For instructions with opcodes for which the M_REMATERIALIZABLE flag is 101c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// set, this hook lets the target specify whether the instruction is actually 102c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// trivially rematerializable, taking into consideration its operands. This 103c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// predicate must return false if the instruction has any side effects other 104c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// than producing a value, or if it requres any address registers that are 105c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// not always available. 106c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Requirements must be check as stated in isTriviallyReMaterializable() . 107c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isReallyTriviallyReMaterializable(const MachineInstr &MI, 108c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot AliasAnalysis *AA) const { 109c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 110c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 111c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 112c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This method commutes the operands of the given machine instruction MI. 113c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The operands to be commuted are specified by their indices OpIdx1 and 114c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// OpIdx2. 115c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 116c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If a target has any instructions that are commutable but require 117c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// converting to different instructions or making non-trivial changes 118c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// to commute them, this method can be overloaded to do that. 119c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The default implementation simply swaps the commutable operands. 120c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 121c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If NewMI is false, MI is modified in place and returned; otherwise, a 122c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// new machine instruction is created and returned. 123c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 124c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Do not call this method for a non-commutable instruction. 125c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Even though the instruction is commutable, the method may still 126c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// fail to commute the operands, null pointer is returned in such cases. 127c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineInstr *commuteInstructionImpl(MachineInstr &MI, bool NewMI, 128c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned OpIdx1, 129c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned OpIdx2) const; 130c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 131c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Assigns the (CommutableOpIdx1, CommutableOpIdx2) pair of commutable 132c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// operand indices to (ResultIdx1, ResultIdx2). 133c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// One or both input values of the pair: (ResultIdx1, ResultIdx2) may be 134c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// predefined to some indices or be undefined (designated by the special 135c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// value 'CommuteAnyOperandIndex'). 136c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The predefined result indices cannot be re-defined. 137c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The function returns true iff after the result pair redefinition 138c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the fixed result pair is equal to or equivalent to the source pair of 139c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// indices: (CommutableOpIdx1, CommutableOpIdx2). It is assumed here that 140c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the pairs (x,y) and (y,x) are equivalent. 141c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot static bool fixCommutedOpIndices(unsigned &ResultIdx1, unsigned &ResultIdx2, 142c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned CommutableOpIdx1, 143c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned CommutableOpIdx2); 144c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 145c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotprivate: 146c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// For instructions with opcodes for which the M_REMATERIALIZABLE flag is 147c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// set and the target hook isReallyTriviallyReMaterializable returns false, 148c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// this function does target-independent tests to determine if the 149c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instruction is really trivially rematerializable. 150c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool isReallyTriviallyReMaterializableGeneric(const MachineInstr &MI, 151c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot AliasAnalysis *AA) const; 152c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 153c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotpublic: 154c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// These methods return the opcode of the frame setup/destroy instructions 155c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// if they exist (-1 otherwise). Some targets use pseudo instructions in 156c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// order to abstract away the difference between operating with a frame 157c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// pointer and operating without, through the use of these two instructions. 158c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 159c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned getCallFrameSetupOpcode() const { return CallFrameSetupOpcode; } 160c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned getCallFrameDestroyOpcode() const { return CallFrameDestroyOpcode; } 161c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 162c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns true if the argument is a frame pseudo instruction. 163c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool isFrameInstr(const MachineInstr &I) const { 164c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return I.getOpcode() == getCallFrameSetupOpcode() || 165c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot I.getOpcode() == getCallFrameDestroyOpcode(); 166c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 167c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 168c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns true if the argument is a frame setup pseudo instruction. 169c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool isFrameSetup(const MachineInstr &I) const { 170c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return I.getOpcode() == getCallFrameSetupOpcode(); 171c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 172c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 173c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns size of the frame associated with the given frame instruction. 174c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// For frame setup instruction this is frame that is set up space set up 175c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// after the instruction. For frame destroy instruction this is the frame 176c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// freed by the caller. 177c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Note, in some cases a call frame (or a part of it) may be prepared prior 178c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// to the frame setup instruction. It occurs in the calls that involve 179c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// inalloca arguments. This function reports only the size of the frame part 180c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// that is set up between the frame setup and destroy pseudo instructions. 181c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int64_t getFrameSize(const MachineInstr &I) const { 182c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot assert(isFrameInstr(I) && "Not a frame instruction"); 183c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot assert(I.getOperand(0).getImm() >= 0); 184c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return I.getOperand(0).getImm(); 185c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 186c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 187c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns the total frame size, which is made up of the space set up inside 188c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the pair of frame start-stop instructions and the space that is set up 189c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// prior to the pair. 190c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int64_t getFrameTotalSize(const MachineInstr &I) const { 191c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot if (isFrameSetup(I)) { 192c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot assert(I.getOperand(1).getImm() >= 0 && 193c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "Frame size must not be negative"); 194c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return getFrameSize(I) + I.getOperand(1).getImm(); 195c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 196c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return getFrameSize(I); 197c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 198c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 199c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned getCatchReturnOpcode() const { return CatchRetOpcode; } 200c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned getReturnOpcode() const { return ReturnOpcode; } 201c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 202c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns the actual stack pointer adjustment made by an instruction 203c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// as part of a call sequence. By default, only call frame setup/destroy 204c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instructions adjust the stack, but targets may want to override this 205c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// to enable more fine-grained adjustment, or adjust by a different value. 206c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual int getSPAdjust(const MachineInstr &MI) const; 207c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 208c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if the instruction is a "coalescable" extension instruction. 209c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// That is, it's like a copy where it's legal for the source to overlap the 210c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// destination. e.g. X86::MOVSX64rr32. If this returns true, then it's 211c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// expected the pre-extension value is available as a subreg of the result 212c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// register. This also returns the sub-register index in SubIdx. 213c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isCoalescableExtInstr(const MachineInstr &MI, unsigned &SrcReg, 214c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned &DstReg, unsigned &SubIdx) const { 215c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 216c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 217c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 218c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If the specified machine instruction is a direct 219c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// load from a stack slot, return the virtual or physical register number of 220c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the destination along with the FrameIndex of the loaded stack slot. If 221c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// not, return 0. This predicate must return 0 if the instruction has 222c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// any side effects other than loading from the stack slot. 223c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned isLoadFromStackSlot(const MachineInstr &MI, 224c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int &FrameIndex) const { 225c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return 0; 226c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 227c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 228c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Check for post-frame ptr elimination stack locations as well. 229c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This uses a heuristic so it isn't reliable for correctness. 230c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned isLoadFromStackSlotPostFE(const MachineInstr &MI, 231c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int &FrameIndex) const { 232c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return 0; 233c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 234c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 235c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If the specified machine instruction has a load from a stack slot, 236c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// return true along with the FrameIndex of the loaded stack slot and the 237c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// machine mem operand containing the reference. 238c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If not, return false. Unlike isLoadFromStackSlot, this returns true for 239c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// any instructions that loads from the stack. This is just a hint, as some 240c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// cases may be missed. 241c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool hasLoadFromStackSlot(const MachineInstr &MI, 242c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineMemOperand *&MMO, 243c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int &FrameIndex) const; 244c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 245c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If the specified machine instruction is a direct 246c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// store to a stack slot, return the virtual or physical register number of 247c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the source reg along with the FrameIndex of the loaded stack slot. If 248c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// not, return 0. This predicate must return 0 if the instruction has 249c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// any side effects other than storing to the stack slot. 250c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned isStoreToStackSlot(const MachineInstr &MI, 251c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int &FrameIndex) const { 252c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return 0; 253c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 254c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 255c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Check for post-frame ptr elimination stack locations as well. 256c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This uses a heuristic, so it isn't reliable for correctness. 257c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned isStoreToStackSlotPostFE(const MachineInstr &MI, 258c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int &FrameIndex) const { 259c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return 0; 260c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 261c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 262c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If the specified machine instruction has a store to a stack slot, 263c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// return true along with the FrameIndex of the loaded stack slot and the 264c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// machine mem operand containing the reference. 265c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If not, return false. Unlike isStoreToStackSlot, 266c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// this returns true for any instructions that stores to the 267c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// stack. This is just a hint, as some cases may be missed. 268c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool hasStoreToStackSlot(const MachineInstr &MI, 269c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineMemOperand *&MMO, 270c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int &FrameIndex) const; 271c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 272c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if the specified machine instruction 273c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// is a copy of one stack slot to another and has no other effect. 274c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Provide the identity of the two frame indices. 275c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isStackSlotCopy(const MachineInstr &MI, int &DestFrameIndex, 276c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int &SrcFrameIndex) const { 277c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 278c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 279c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 280c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Compute the size in bytes and offset within a stack slot of a spilled 281c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// register or subregister. 282c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 283c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param [out] Size in bytes of the spilled value. 284c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param [out] Offset in bytes within the stack slot. 285c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns true if both Size and Offset are successfully computed. 286c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 287c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Not all subregisters have computable spill slots. For example, 288c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// subregisters registers may not be byte-sized, and a pair of discontiguous 289c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// subregisters has no single offset. 290c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 291c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Targets with nontrivial bigendian implementations may need to override 292c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// this, particularly to support spilled vector registers. 293c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool getStackSlotRange(const TargetRegisterClass *RC, unsigned SubIdx, 294c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned &Size, unsigned &Offset, 295c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineFunction &MF) const; 296c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 297c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns the size in bytes of the specified MachineInstr, or ~0U 298c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// when this function is not implemented by a target. 299c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned getInstSizeInBytes(const MachineInstr &MI) const { 300c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return ~0U; 301c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 302c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 303c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if the instruction is as cheap as a move instruction. 304c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 305c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Targets for different archs need to override this, and different 306c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// micro-architectures can also be finely tuned inside. 307c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isAsCheapAsAMove(const MachineInstr &MI) const { 308c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return MI.isAsCheapAsAMove(); 309c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 310c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 311c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if the instruction should be sunk by MachineSink. 312c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 313c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MachineSink determines on its own whether the instruction is safe to sink; 314c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// this gives the target a hook to override the default behavior with regards 315c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// to which instructions should be sunk. 316c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool shouldSink(const MachineInstr &MI) const { return true; } 317c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 318c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Re-issue the specified 'original' instruction at the 319c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// specific location targeting a new destination register. 320c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The register in Orig->getOperand(0).getReg() will be substituted by 321c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// DestReg:SubIdx. Any existing subreg index is preserved or composed with 322c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// SubIdx. 323c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void reMaterialize(MachineBasicBlock &MBB, 324c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator MI, unsigned DestReg, 325c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned SubIdx, const MachineInstr &Orig, 326c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterInfo &TRI) const; 327c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 328c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Clones instruction or the whole instruction bundle \p Orig and 329c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// insert into \p MBB before \p InsertBefore. The target may update operands 330c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// that are required to be unique. 331c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 332c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \p Orig must not return true for MachineInstr::isNotDuplicable(). 333c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineInstr &duplicate(MachineBasicBlock &MBB, 334c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator InsertBefore, 335c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &Orig) const; 336c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 337c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This method must be implemented by targets that 338c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// set the M_CONVERTIBLE_TO_3_ADDR flag. When this flag is set, the target 339c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// may be able to convert a two-address instruction into one or more true 340c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// three-address instructions on demand. This allows the X86 target (for 341c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// example) to convert ADD and SHL instructions into LEA instructions if they 342c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// would require register copies due to two-addressness. 343c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 344c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This method returns a null pointer if the transformation cannot be 345c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// performed, otherwise it returns the last new instruction. 346c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 347c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineInstr *convertToThreeAddress(MachineFunction::iterator &MFI, 348c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr &MI, 349c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot LiveVariables *LV) const { 350c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return nullptr; 351c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 352c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 353c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot // This constant can be used as an input value of operand index passed to 354c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot // the method findCommutedOpIndices() to tell the method that the 355c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot // corresponding operand index is not pre-defined and that the method 356c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot // can pick any commutable operand. 357c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot static const unsigned CommuteAnyOperandIndex = ~0U; 358c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 359c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This method commutes the operands of the given machine instruction MI. 360c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 361c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The operands to be commuted are specified by their indices OpIdx1 and 362c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// OpIdx2. OpIdx1 and OpIdx2 arguments may be set to a special value 363c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 'CommuteAnyOperandIndex', which means that the method is free to choose 364c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// any arbitrarily chosen commutable operand. If both arguments are set to 365c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 'CommuteAnyOperandIndex' then the method looks for 2 different commutable 366c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// operands; then commutes them if such operands could be found. 367c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 368c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If NewMI is false, MI is modified in place and returned; otherwise, a 369c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// new machine instruction is created and returned. 370c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 371c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Do not call this method for a non-commutable instruction or 372c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// for non-commuable operands. 373c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Even though the instruction is commutable, the method may still 374c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// fail to commute the operands, null pointer is returned in such cases. 375c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr * 376c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot commuteInstruction(MachineInstr &MI, bool NewMI = false, 377c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned OpIdx1 = CommuteAnyOperandIndex, 378c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned OpIdx2 = CommuteAnyOperandIndex) const; 379c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 380c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns true iff the routine could find two commutable operands in the 381c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// given machine instruction. 382c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The 'SrcOpIdx1' and 'SrcOpIdx2' are INPUT and OUTPUT arguments. 383c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If any of the INPUT values is set to the special value 384c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 'CommuteAnyOperandIndex' then the method arbitrarily picks a commutable 385c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// operand, then returns its index in the corresponding argument. 386c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If both of INPUT values are set to 'CommuteAnyOperandIndex' then method 387c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// looks for 2 commutable operands. 388c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If INPUT values refer to some operands of MI, then the method simply 389c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// returns true if the corresponding operands are commutable and returns 390c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// false otherwise. 391c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 392c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// For example, calling this method this way: 393c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// unsigned Op1 = 1, Op2 = CommuteAnyOperandIndex; 394c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// findCommutedOpIndices(MI, Op1, Op2); 395c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// can be interpreted as a query asking to find an operand that would be 396c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// commutable with the operand#1. 397c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool findCommutedOpIndices(MachineInstr &MI, unsigned &SrcOpIdx1, 398c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned &SrcOpIdx2) const; 399c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 400c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// A pair composed of a register and a sub-register index. 401c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Used to give some type checking when modeling Reg:SubReg. 402c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot struct RegSubRegPair { 403c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned Reg; 404c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned SubReg; 405c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 406c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegSubRegPair(unsigned Reg = 0, unsigned SubReg = 0) 407c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot : Reg(Reg), SubReg(SubReg) {} 408c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot }; 409c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 410c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// A pair composed of a pair of a register and a sub-register index, 411c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// and another sub-register index. 412c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Used to give some type checking when modeling Reg:SubReg1, SubReg2. 413c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot struct RegSubRegPairAndIdx : RegSubRegPair { 414c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned SubIdx; 415c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 416c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegSubRegPairAndIdx(unsigned Reg = 0, unsigned SubReg = 0, 417c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned SubIdx = 0) 418c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot : RegSubRegPair(Reg, SubReg), SubIdx(SubIdx) {} 419c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot }; 420c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 421c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Build the equivalent inputs of a REG_SEQUENCE for the given \p MI 422c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// and \p DefIdx. 423c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \p [out] InputRegs of the equivalent REG_SEQUENCE. Each element of 424c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the list is modeled as <Reg:SubReg, SubIdx>. 425c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// E.g., REG_SEQUENCE vreg1:sub1, sub0, vreg2, sub1 would produce 426c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// two elements: 427c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// - vreg1:sub1, sub0 428c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// - vreg2<:0>, sub1 429c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 430c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns true if it is possible to build such an input sequence 431c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// with the pair \p MI, \p DefIdx. False otherwise. 432c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 433c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \pre MI.isRegSequence() or MI.isRegSequenceLike(). 434c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 435c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \note The generic implementation does not provide any support for 436c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MI.isRegSequenceLike(). In other words, one has to override 437c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// getRegSequenceLikeInputs for target specific instructions. 438c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool 439c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getRegSequenceInputs(const MachineInstr &MI, unsigned DefIdx, 440c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<RegSubRegPairAndIdx> &InputRegs) const; 441c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 442c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Build the equivalent inputs of a EXTRACT_SUBREG for the given \p MI 443c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// and \p DefIdx. 444c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \p [out] InputReg of the equivalent EXTRACT_SUBREG. 445c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// E.g., EXTRACT_SUBREG vreg1:sub1, sub0, sub1 would produce: 446c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// - vreg1:sub1, sub0 447c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 448c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns true if it is possible to build such an input sequence 449c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// with the pair \p MI, \p DefIdx. False otherwise. 450c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 451c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \pre MI.isExtractSubreg() or MI.isExtractSubregLike(). 452c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 453c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \note The generic implementation does not provide any support for 454c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MI.isExtractSubregLike(). In other words, one has to override 455c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// getExtractSubregLikeInputs for target specific instructions. 456c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool getExtractSubregInputs(const MachineInstr &MI, unsigned DefIdx, 457c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegSubRegPairAndIdx &InputReg) const; 458c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 459c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Build the equivalent inputs of a INSERT_SUBREG for the given \p MI 460c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// and \p DefIdx. 461c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \p [out] BaseReg and \p [out] InsertedReg contain 462c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the equivalent inputs of INSERT_SUBREG. 463c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// E.g., INSERT_SUBREG vreg0:sub0, vreg1:sub1, sub3 would produce: 464c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// - BaseReg: vreg0:sub0 465c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// - InsertedReg: vreg1:sub1, sub3 466c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 467c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns true if it is possible to build such an input sequence 468c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// with the pair \p MI, \p DefIdx. False otherwise. 469c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 470c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \pre MI.isInsertSubreg() or MI.isInsertSubregLike(). 471c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 472c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \note The generic implementation does not provide any support for 473c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MI.isInsertSubregLike(). In other words, one has to override 474c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// getInsertSubregLikeInputs for target specific instructions. 475c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool getInsertSubregInputs(const MachineInstr &MI, unsigned DefIdx, 476c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegSubRegPair &BaseReg, 477c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegSubRegPairAndIdx &InsertedReg) const; 478c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 479c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if two machine instructions would produce identical values. 480c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// By default, this is only true when the two instructions 481c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// are deemed identical except for defs. If this function is called when the 482c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// IR is still in SSA form, the caller can pass the MachineRegisterInfo for 483c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// aggressive checks. 484c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool produceSameValue(const MachineInstr &MI0, 485c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &MI1, 486c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineRegisterInfo *MRI = nullptr) const; 487c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 488c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns true if a branch from an instruction with opcode \p BranchOpc 489c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// bytes is capable of jumping to a position \p BrOffset bytes away. 490c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isBranchOffsetInRange(unsigned BranchOpc, 491c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int64_t BrOffset) const { 492c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("target did not implement"); 493c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 494c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 495c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns The block that branch instruction \p MI jumps to. 496c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineBasicBlock *getBranchDestBlock(const MachineInstr &MI) const { 497c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("target did not implement"); 498c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 499c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 500c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Insert an unconditional indirect branch at the end of \p MBB to \p 501c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// NewDestBB. \p BrOffset indicates the offset of \p NewDestBB relative to 502c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the offset of the position to insert the new branch. 503c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 504c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns The number of bytes added to the block. 505c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned insertIndirectBranch(MachineBasicBlock &MBB, 506c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock &NewDestBB, 507c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const DebugLoc &DL, 508c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int64_t BrOffset = 0, 509c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegScavenger *RS = nullptr) const { 510c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("target did not implement"); 511c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 512c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 513c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Analyze the branching code at the end of MBB, returning 514c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// true if it cannot be understood (e.g. it's a switch dispatch or isn't 515c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// implemented for a target). Upon success, this returns false and returns 516c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// with the following information in various cases: 517c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 518c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1. If this block ends with no branches (it just falls through to its succ) 519c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// just return false, leaving TBB/FBB null. 520c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 2. If this block ends with only an unconditional branch, it sets TBB to be 521c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the destination block. 522c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 3. If this block ends with a conditional branch and it falls through to a 523c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// successor block, it sets TBB to be the branch destination block and a 524c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// list of operands that evaluate the condition. These operands can be 525c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// passed to other TargetInstrInfo methods to create new branches. 526c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 4. If this block ends with a conditional branch followed by an 527c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// unconditional branch, it returns the 'true' destination in TBB, the 528c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 'false' destination in FBB, and a list of operands that evaluate the 529c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// condition. These operands can be passed to other TargetInstrInfo 530c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// methods to create new branches. 531c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 532c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Note that removeBranch and insertBranch must be implemented to support 533c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// cases where this method returns success. 534c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 535c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If AllowModify is true, then this routine is allowed to modify the basic 536c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// block (e.g. delete instructions after the unconditional branch). 537c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 538c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The CFG information in MBB.Predecessors and MBB.Successors must be valid 539c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// before calling this function. 540c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool analyzeBranch(MachineBasicBlock &MBB, MachineBasicBlock *&TBB, 541c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock *&FBB, 542c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineOperand> &Cond, 543c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool AllowModify = false) const { 544c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return true; 545c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 546c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 547c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Represents a predicate at the MachineFunction level. The control flow a 548c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MachineBranchPredicate represents is: 549c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 550c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Reg <def>= LHS `Predicate` RHS == ConditionDef 551c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// if Reg then goto TrueDest else goto FalseDest 552c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 553c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot struct MachineBranchPredicate { 554c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot enum ComparePredicate { 555c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot PRED_EQ, // True if two values are equal 556c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot PRED_NE, // True if two values are not equal 557c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot PRED_INVALID // Sentinel value 558c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot }; 559c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 560c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot ComparePredicate Predicate = PRED_INVALID; 561c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineOperand LHS = MachineOperand::CreateImm(0); 562c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineOperand RHS = MachineOperand::CreateImm(0); 563c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock *TrueDest = nullptr; 564c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock *FalseDest = nullptr; 565c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr *ConditionDef = nullptr; 566c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 567c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// SingleUseCondition is true if ConditionDef is dead except for the 568c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// branch(es) at the end of the basic block. 569c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 570c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool SingleUseCondition = false; 571c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 572c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot explicit MachineBranchPredicate() = default; 573c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot }; 574c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 575c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Analyze the branching code at the end of MBB and parse it into the 576c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MachineBranchPredicate structure if possible. Returns false on success 577c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// and true on failure. 578c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 579c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If AllowModify is true, then this routine is allowed to modify the basic 580c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// block (e.g. delete instructions after the unconditional branch). 581c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 582c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool analyzeBranchPredicate(MachineBasicBlock &MBB, 583c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBranchPredicate &MBP, 584c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool AllowModify = false) const { 585c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return true; 586c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 587c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 588c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Remove the branching code at the end of the specific MBB. 589c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This is only invoked in cases where AnalyzeBranch returns success. It 590c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// returns the number of instructions that were removed. 591c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If \p BytesRemoved is non-null, report the change in code size from the 592c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// removed instructions. 593c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned removeBranch(MachineBasicBlock &MBB, 594c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int *BytesRemoved = nullptr) const { 595c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target didn't implement TargetInstrInfo::removeBranch!"); 596c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 597c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 598c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Insert branch code into the end of the specified MachineBasicBlock. The 599c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// operands to this method are the same as those returned by AnalyzeBranch. 600c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This is only invoked in cases where AnalyzeBranch returns success. It 601c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// returns the number of instructions inserted. If \p BytesAdded is non-null, 602c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// report the change in code size from the added instructions. 603c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 604c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// It is also invoked by tail merging to add unconditional branches in 605c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// cases where AnalyzeBranch doesn't apply because there was no original 606c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// branch to analyze. At least this much must be implemented, else tail 607c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// merging needs to be disabled. 608c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 609c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The CFG information in MBB.Predecessors and MBB.Successors must be valid 610c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// before calling this function. 611c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned insertBranch(MachineBasicBlock &MBB, MachineBasicBlock *TBB, 612c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock *FBB, 613c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot ArrayRef<MachineOperand> Cond, 614c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const DebugLoc &DL, 615c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int *BytesAdded = nullptr) const { 616c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target didn't implement TargetInstrInfo::insertBranch!"); 617c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 618c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 619c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned insertUnconditionalBranch(MachineBasicBlock &MBB, 620c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock *DestBB, 621c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const DebugLoc &DL, 622c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int *BytesAdded = nullptr) const { 623c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return insertBranch(MBB, DestBB, nullptr, ArrayRef<MachineOperand>(), DL, 624c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot BytesAdded); 625c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 626c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 627c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Analyze the loop code, return true if it cannot be understoo. Upon 628c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// success, this function returns false and returns information about the 629c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// induction variable and compare instruction used at the end. 630c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool analyzeLoop(MachineLoop &L, MachineInstr *&IndVarInst, 631c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr *&CmpInst) const { 632c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return true; 633c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 634c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 635c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Generate code to reduce the loop iteration by one and check if the loop is 636c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// finished. Return the value/register of the the new loop count. We need 637c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// this function when peeling off one or more iterations of a loop. This 638c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// function assumes the nth iteration is peeled first. 639c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned reduceLoopCount(MachineBasicBlock &MBB, MachineInstr *IndVar, 640c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr &Cmp, 641c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineOperand> &Cond, 642c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineInstr *> &PrevInsts, 643c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned Iter, unsigned MaxIter) const { 644c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target didn't implement ReduceLoopCount"); 645c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 646c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 647c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Delete the instruction OldInst and everything after it, replacing it with 648c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// an unconditional branch to NewDest. This is used by the tail merging pass. 649c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void ReplaceTailWithBranchTo(MachineBasicBlock::iterator Tail, 650c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock *NewDest) const; 651c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 652c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if it's legal to split the given basic 653c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// block at the specified instruction (i.e. instruction would be the start 654c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// of a new basic block). 655c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isLegalToSplitMBBAt(MachineBasicBlock &MBB, 656c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator MBBI) const { 657c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return true; 658c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 659c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 660c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if it's profitable to predicate 661c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instructions with accumulated instruction latency of "NumCycles" 662c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// of the specified basic block, where the probability of the instructions 663c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// being executed is given by Probability, and Confidence is a measure 664c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// of our confidence that it will be properly predicted. 665c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isProfitableToIfCvt(MachineBasicBlock &MBB, unsigned NumCycles, 666c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned ExtraPredCycles, 667c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot BranchProbability Probability) const { 668c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 669c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 670c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 671c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Second variant of isProfitableToIfCvt. This one 672c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// checks for the case where two basic blocks from true and false path 673c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// of a if-then-else (diamond) are predicated on mutally exclusive 674c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// predicates, where the probability of the true path being taken is given 675c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// by Probability, and Confidence is a measure of our confidence that it 676c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// will be properly predicted. 677c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isProfitableToIfCvt(MachineBasicBlock &TMBB, unsigned NumTCycles, 678c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned ExtraTCycles, 679c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock &FMBB, unsigned NumFCycles, 680c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned ExtraFCycles, 681c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot BranchProbability Probability) const { 682c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 683c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 684c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 685c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if it's profitable for if-converter to duplicate instructions 686c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// of specified accumulated instruction latencies in the specified MBB to 687c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// enable if-conversion. 688c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The probability of the instructions being executed is given by 689c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Probability, and Confidence is a measure of our confidence that it 690c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// will be properly predicted. 691c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isProfitableToDupForIfCvt(MachineBasicBlock &MBB, 692c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned NumCycles, 693c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot BranchProbability Probability) const { 694c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 695c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 696c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 697c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if it's profitable to unpredicate 698c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// one side of a 'diamond', i.e. two sides of if-else predicated on mutually 699c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// exclusive predicates. 700c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// e.g. 701c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// subeq r0, r1, #1 702c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// addne r0, r1, #1 703c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// => 704c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// sub r0, r1, #1 705c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// addne r0, r1, #1 706c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 707c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This may be profitable is conditional instructions are always executed. 708c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isProfitableToUnpredicate(MachineBasicBlock &TMBB, 709c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock &FMBB) const { 710c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 711c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 712c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 713c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if it is possible to insert a select 714c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instruction that chooses between TrueReg and FalseReg based on the 715c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// condition code in Cond. 716c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 717c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// When successful, also return the latency in cycles from TrueReg, 718c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// FalseReg, and Cond to the destination register. In most cases, a select 719c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instruction will be 1 cycle, so CondCycles = TrueCycles = FalseCycles = 1 720c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 721c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Some x86 implementations have 2-cycle cmov instructions. 722c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 723c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param MBB Block where select instruction would be inserted. 724c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param Cond Condition returned by AnalyzeBranch. 725c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param TrueReg Virtual register to select when Cond is true. 726c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param FalseReg Virtual register to select when Cond is false. 727c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param CondCycles Latency from Cond+Branch to select output. 728c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param TrueCycles Latency from TrueReg to select output. 729c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param FalseCycles Latency from FalseReg to select output. 730c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool canInsertSelect(const MachineBasicBlock &MBB, 731c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot ArrayRef<MachineOperand> Cond, unsigned TrueReg, 732c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned FalseReg, int &CondCycles, 733c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int &TrueCycles, int &FalseCycles) const { 734c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 735c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 736c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 737c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Insert a select instruction into MBB before I that will copy TrueReg to 738c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// DstReg when Cond is true, and FalseReg to DstReg when Cond is false. 739c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 740c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This function can only be called after canInsertSelect() returned true. 741c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The condition in Cond comes from AnalyzeBranch, and it can be assumed 742c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// that the same flags or registers required by Cond are available at the 743c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// insertion point. 744c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 745c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param MBB Block where select instruction should be inserted. 746c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param I Insertion point. 747c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param DL Source location for debugging. 748c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param DstReg Virtual register to be defined by select instruction. 749c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param Cond Condition as computed by AnalyzeBranch. 750c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param TrueReg Virtual register to copy when Cond is true. 751c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param FalseReg Virtual register to copy when Cons is false. 752c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void insertSelect(MachineBasicBlock &MBB, 753c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator I, const DebugLoc &DL, 754c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned DstReg, ArrayRef<MachineOperand> Cond, 755c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned TrueReg, unsigned FalseReg) const { 756c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target didn't implement TargetInstrInfo::insertSelect!"); 757c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 758c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 759c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Analyze the given select instruction, returning true if 760c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// it cannot be understood. It is assumed that MI->isSelect() is true. 761c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 762c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// When successful, return the controlling condition and the operands that 763c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// determine the true and false result values. 764c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 765c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Result = SELECT Cond, TrueOp, FalseOp 766c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 767c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Some targets can optimize select instructions, for example by predicating 768c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the instruction defining one of the operands. Such targets should set 769c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Optimizable. 770c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 771c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param MI Select instruction to analyze. 772c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param Cond Condition controlling the select. 773c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param TrueOp Operand number of the value selected when Cond is true. 774c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param FalseOp Operand number of the value selected when Cond is false. 775c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param Optimizable Returned as true if MI is optimizable. 776c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @returns False on success. 777c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool analyzeSelect(const MachineInstr &MI, 778c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineOperand> &Cond, 779c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned &TrueOp, unsigned &FalseOp, 780c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool &Optimizable) const { 781c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot assert(MI.getDesc().isSelect() && "MI must be a select instruction"); 782c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return true; 783c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 784c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 785c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Given a select instruction that was understood by 786c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// analyzeSelect and returned Optimizable = true, attempt to optimize MI by 787c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// merging it with one of its operands. Returns NULL on failure. 788c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 789c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// When successful, returns the new select instruction. The client is 790c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// responsible for deleting MI. 791c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 792c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If both sides of the select can be optimized, PreferFalse is used to pick 793c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// a side. 794c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 795c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param MI Optimizable select instruction. 796c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param NewMIs Set that record all MIs in the basic block up to \p 797c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MI. Has to be updated with any newly created MI or deleted ones. 798c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @param PreferFalse Try to optimize FalseOp instead of TrueOp. 799c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// @returns Optimized instruction or NULL. 800c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineInstr *optimizeSelect(MachineInstr &MI, 801c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallPtrSetImpl<MachineInstr *> &NewMIs, 802c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool PreferFalse = false) const { 803c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot // This function must be implemented if Optimizable is ever set. 804c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target must implement TargetInstrInfo::optimizeSelect!"); 805c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 806c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 807c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Emit instructions to copy a pair of physical registers. 808c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 809c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This function should support copies within any legal register class as 810c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// well as any cross-class copies created during instruction selection. 811c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 812c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The source and destination registers may overlap, which may require a 813c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// careful implementation when multiple copy instructions are required for 814c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// large registers. See for example the ARM target. 815c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void copyPhysReg(MachineBasicBlock &MBB, 816c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator MI, const DebugLoc &DL, 817c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned DestReg, unsigned SrcReg, 818c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool KillSrc) const { 819c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target didn't implement TargetInstrInfo::copyPhysReg!"); 820c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 821c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 822c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Store the specified register of the given register class to the specified 823c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// stack frame index. The store instruction is to be added to the given 824c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// machine basic block before the specified machine instruction. If isKill 825c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// is true, the register operand is the last use and must be marked kill. 826c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void storeRegToStackSlot(MachineBasicBlock &MBB, 827c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator MI, 828c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned SrcReg, bool isKill, int FrameIndex, 829c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterClass *RC, 830c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterInfo *TRI) const { 831c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target didn't implement " 832c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "TargetInstrInfo::storeRegToStackSlot!"); 833c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 834c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 835c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Load the specified register of the given register class from the specified 836c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// stack frame index. The load instruction is to be added to the given 837c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// machine basic block before the specified machine instruction. 838c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void loadRegFromStackSlot(MachineBasicBlock &MBB, 839c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator MI, 840c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned DestReg, int FrameIndex, 841c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterClass *RC, 842c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterInfo *TRI) const { 843c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target didn't implement " 844c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "TargetInstrInfo::loadRegFromStackSlot!"); 845c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 846c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 847c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This function is called for all pseudo instructions 848c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// that remain after register allocation. Many pseudo instructions are 849c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// created to help register allocation. This is the place to convert them 850c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// into real instructions. The target can edit MI in place, or it can insert 851c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// new instructions and erase MI. The function should return true if 852c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// anything was changed. 853c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool expandPostRAPseudo(MachineInstr &MI) const { return false; } 854c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 855c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Check whether the target can fold a load that feeds a subreg operand 856c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// (or a subreg operand that feeds a store). 857c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// For example, X86 may want to return true if it can fold 858c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// movl (%esp), %eax 859c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// subb, %al, ... 860c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Into: 861c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// subb (%esp), ... 862c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 863c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Ideally, we'd like the target implementation of foldMemoryOperand() to 864c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// reject subregs - but since this behavior used to be enforced in the 865c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// target-independent code, moving this responsibility to the targets 866c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// has the potential of causing nasty silent breakage in out-of-tree targets. 867c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isSubregFoldable() const { return false; } 868c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 869c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Attempt to fold a load or store of the specified stack 870c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// slot into the specified machine instruction for the specified operand(s). 871c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If this is possible, a new instruction is returned with the specified 872c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// operand folded, otherwise NULL is returned. 873c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The new instruction is inserted before MI, and the client is responsible 874c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// for removing the old instruction. 875c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr *foldMemoryOperand(MachineInstr &MI, ArrayRef<unsigned> Ops, 876c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int FrameIndex, 877c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot LiveIntervals *LIS = nullptr) const; 878c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 879c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Same as the previous version except it allows folding of any load and 880c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// store from / to any address, not just from a specific stack slot. 881c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr *foldMemoryOperand(MachineInstr &MI, ArrayRef<unsigned> Ops, 882c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr &LoadMI, 883c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot LiveIntervals *LIS = nullptr) const; 884c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 885c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true when there is potentially a faster code sequence 886c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// for an instruction chain ending in \p Root. All potential patterns are 887c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// returned in the \p Pattern vector. Pattern should be sorted in priority 888c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// order since the pattern evaluator stops checking as soon as it finds a 889c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// faster sequence. 890c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param Root - Instruction that could be combined with one of its operands 891c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param Patterns - Vector of possible combination patterns 892c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool getMachineCombinerPatterns( 893c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr &Root, 894c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineCombinerPattern> &Patterns) const; 895c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 896c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true when a code sequence can improve throughput. It 897c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// should be called only for instructions in loops. 898c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param Pattern - combiner pattern 899c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isThroughputPattern(MachineCombinerPattern Pattern) const; 900c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 901c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if the input \P Inst is part of a chain of dependent ops 902c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// that are suitable for reassociation, otherwise return false. 903c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If the instruction's operands must be commuted to have a previous 904c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instruction of the same type define the first source operand, \P Commuted 905c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// will be set to true. 906c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool isReassociationCandidate(const MachineInstr &Inst, bool &Commuted) const; 907c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 908c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true when \P Inst is both associative and commutative. 909c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isAssociativeAndCommutative(const MachineInstr &Inst) const { 910c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 911c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 912c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 913c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true when \P Inst has reassociable operands in the same \P MBB. 914c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool hasReassociableOperands(const MachineInstr &Inst, 915c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineBasicBlock *MBB) const; 916c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 917c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true when \P Inst has reassociable sibling. 918c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool hasReassociableSibling(const MachineInstr &Inst, bool &Commuted) const; 919c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 920c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// When getMachineCombinerPatterns() finds patterns, this function generates 921c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the instructions that could replace the original code sequence. The client 922c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// has to decide whether the actual replacement is beneficial or not. 923c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param Root - Instruction that could be combined with one of its operands 924c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param Pattern - Combination pattern for Root 925c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param InsInstrs - Vector of new instructions that implement P 926c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param DelInstrs - Old instructions, including Root, that could be 927c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// replaced by InsInstr 928c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \param InstrIdxForVirtReg - map of virtual register to instruction in 929c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// InsInstr that defines it 930c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void genAlternativeCodeSequence( 931c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr &Root, MachineCombinerPattern Pattern, 932c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineInstr *> &InsInstrs, 933c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineInstr *> &DelInstrs, 934c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot DenseMap<unsigned, unsigned> &InstrIdxForVirtReg) const; 935c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 936c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Attempt to reassociate \P Root and \P Prev according to \P Pattern to 937c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// reduce critical path length. 938c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot void reassociateOps(MachineInstr &Root, MachineInstr &Prev, 939c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineCombinerPattern Pattern, 940c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineInstr *> &InsInstrs, 941c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineInstr *> &DelInstrs, 942c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot DenseMap<unsigned, unsigned> &InstrIdxForVirtReg) const; 943c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 944c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This is an architecture-specific helper function of reassociateOps. 945c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Set special operand attributes for new instructions after reassociation. 946c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void setSpecialOperandAttr(MachineInstr &OldMI1, MachineInstr &OldMI2, 947c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr &NewMI1, 948c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr &NewMI2) const {} 949c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 950c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true when a target supports MachineCombiner. 951c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool useMachineCombiner() const { return false; } 952c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 953c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotprotected: 954c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Target-dependent implementation for foldMemoryOperand. 955c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Target-independent code in foldMemoryOperand will 956c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// take care of adding a MachineMemOperand to the newly created instruction. 957c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The instruction and any auxiliary instructions necessary will be inserted 958c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// at InsertPt. 959c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineInstr * 960c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot foldMemoryOperandImpl(MachineFunction &MF, MachineInstr &MI, 961c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot ArrayRef<unsigned> Ops, 962c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator InsertPt, int FrameIndex, 963c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot LiveIntervals *LIS = nullptr) const { 964c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return nullptr; 965c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 966c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 967c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Target-dependent implementation for foldMemoryOperand. 968c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Target-independent code in foldMemoryOperand will 969c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// take care of adding a MachineMemOperand to the newly created instruction. 970c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The instruction and any auxiliary instructions necessary will be inserted 971c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// at InsertPt. 972c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineInstr *foldMemoryOperandImpl( 973c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineFunction &MF, MachineInstr &MI, ArrayRef<unsigned> Ops, 974c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator InsertPt, MachineInstr &LoadMI, 975c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot LiveIntervals *LIS = nullptr) const { 976c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return nullptr; 977c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 978c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 979c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Target-dependent implementation of getRegSequenceInputs. 980c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 981c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns true if it is possible to build the equivalent 982c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// REG_SEQUENCE inputs with the pair \p MI, \p DefIdx. False otherwise. 983c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 984c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \pre MI.isRegSequenceLike(). 985c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 986c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \see TargetInstrInfo::getRegSequenceInputs. 987c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool getRegSequenceLikeInputs( 988c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &MI, unsigned DefIdx, 989c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<RegSubRegPairAndIdx> &InputRegs) const { 990c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 991c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 992c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 993c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Target-dependent implementation of getExtractSubregInputs. 994c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 995c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns true if it is possible to build the equivalent 996c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// EXTRACT_SUBREG inputs with the pair \p MI, \p DefIdx. False otherwise. 997c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 998c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \pre MI.isExtractSubregLike(). 999c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1000c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \see TargetInstrInfo::getExtractSubregInputs. 1001c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool getExtractSubregLikeInputs(const MachineInstr &MI, 1002c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned DefIdx, 1003c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegSubRegPairAndIdx &InputReg) const { 1004c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1005c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1006c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1007c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Target-dependent implementation of getInsertSubregInputs. 1008c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1009c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \returns true if it is possible to build the equivalent 1010c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// INSERT_SUBREG inputs with the pair \p MI, \p DefIdx. False otherwise. 1011c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1012c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \pre MI.isInsertSubregLike(). 1013c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1014c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \see TargetInstrInfo::getInsertSubregInputs. 1015c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool 1016c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getInsertSubregLikeInputs(const MachineInstr &MI, unsigned DefIdx, 1017c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegSubRegPair &BaseReg, 1018c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegSubRegPairAndIdx &InsertedReg) const { 1019c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1020c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1021c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1022c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotpublic: 1023c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// getAddressSpaceForPseudoSourceKind - Given the kind of memory 1024c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// (e.g. stack) the target returns the corresponding address space. 1025c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned 1026c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getAddressSpaceForPseudoSourceKind(PseudoSourceValue::PSVKind Kind) const { 1027c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return 0; 1028c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1029c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1030c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// unfoldMemoryOperand - Separate a single instruction which folded a load or 1031c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// a store or a load and a store into two or more instruction. If this is 1032c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// possible, returns true as well as the new instructions by reference. 1033c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool 1034c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unfoldMemoryOperand(MachineFunction &MF, MachineInstr &MI, unsigned Reg, 1035c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool UnfoldLoad, bool UnfoldStore, 1036c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineInstr *> &NewMIs) const { 1037c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1038c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1039c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1040c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool unfoldMemoryOperand(SelectionDAG &DAG, SDNode *N, 1041c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<SDNode *> &NewNodes) const { 1042c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1043c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1044c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1045c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns the opcode of the would be new 1046c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instruction after load / store are unfolded from an instruction of the 1047c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// specified opcode. It returns zero if the specified unfolding is not 1048c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// possible. If LoadRegIndex is non-null, it is filled in with the operand 1049c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// index of the operand which will hold the register holding the loaded 1050c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// value. 1051c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned 1052c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getOpcodeAfterMemoryUnfold(unsigned Opc, bool UnfoldLoad, bool UnfoldStore, 1053c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned *LoadRegIndex = nullptr) const { 1054c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return 0; 1055c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1056c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1057c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This is used by the pre-regalloc scheduler to determine if two loads are 1058c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// loading from the same base address. It should only return true if the base 1059c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// pointers are the same and the only differences between the two addresses 1060c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// are the offset. It also returns the offsets by reference. 1061c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool areLoadsFromSameBasePtr(SDNode *Load1, SDNode *Load2, 1062c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int64_t &Offset1, 1063c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int64_t &Offset2) const { 1064c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1065c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1066c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1067c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This is a used by the pre-regalloc scheduler to determine (in conjunction 1068c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// with areLoadsFromSameBasePtr) if two loads should be scheduled together. 1069c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// On some targets if two loads are loading from 1070c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// addresses in the same cache line, it's better if they are scheduled 1071c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// together. This function takes two integers that represent the load offsets 1072c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// from the common base address. It returns true if it decides it's desirable 1073c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// to schedule the two loads together. "NumLoads" is the number of loads that 1074c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// have already been scheduled after Load1. 1075c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool shouldScheduleLoadsNear(SDNode *Load1, SDNode *Load2, 1076c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int64_t Offset1, int64_t Offset2, 1077c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned NumLoads) const { 1078c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1079c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1080c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1081c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Get the base register and byte offset of an instruction that reads/writes 1082c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// memory. 1083c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool getMemOpBaseRegImmOfs(MachineInstr &MemOp, unsigned &BaseReg, 1084c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int64_t &Offset, 1085c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterInfo *TRI) const { 1086c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1087c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1088c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1089c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if the instruction contains a base register and offset. If 1090c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// true, the function also sets the operand position in the instruction 1091c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// for the base register and offset. 1092c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool getBaseAndOffsetPosition(const MachineInstr &MI, 1093c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned &BasePos, 1094c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned &OffsetPos) const { 1095c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1096c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1097c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1098c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If the instruction is an increment of a constant value, return the amount. 1099c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool getIncrementValue(const MachineInstr &MI, int &Value) const { 1100c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1101c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1102c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1103c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns true if the two given memory operations should be scheduled 1104c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// adjacent. Note that you have to add: 1105c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// DAG->addMutation(createLoadClusterDAGMutation(DAG->TII, DAG->TRI)); 1106c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// or 1107c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// DAG->addMutation(createStoreClusterDAGMutation(DAG->TII, DAG->TRI)); 1108c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// to TargetPassConfig::createMachineScheduler() to have an effect. 1109c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool shouldClusterMemOps(MachineInstr &FirstLdSt, unsigned BaseReg1, 1110c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr &SecondLdSt, unsigned BaseReg2, 1111c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned NumLoads) const { 1112c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("target did not implement shouldClusterMemOps()"); 1113c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1114c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1115c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Reverses the branch condition of the specified condition list, 1116c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// returning false on success and true if it cannot be reversed. 1117c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool 1118c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot reverseBranchCondition(SmallVectorImpl<MachineOperand> &Cond) const { 1119c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return true; 1120c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1121c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1122c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Insert a noop into the instruction stream at the specified point. 1123c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void insertNoop(MachineBasicBlock &MBB, 1124c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator MI) const; 1125c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1126c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return the noop instruction to use for a noop. 1127c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void getNoop(MCInst &NopInst) const; 1128c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1129c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true for post-incremented instructions. 1130c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isPostIncrement(const MachineInstr &MI) const { return false; } 1131c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1132c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns true if the instruction is already predicated. 1133c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isPredicated(const MachineInstr &MI) const { return false; } 1134c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1135c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns true if the instruction is a 1136c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// terminator instruction that has not been predicated. 1137c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isUnpredicatedTerminator(const MachineInstr &MI) const; 1138c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1139c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns true if MI is an unconditional tail call. 1140c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isUnconditionalTailCall(const MachineInstr &MI) const { 1141c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1142c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1143c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1144c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns true if the tail call can be made conditional on BranchCond. 1145c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool canMakeTailCallConditional(SmallVectorImpl<MachineOperand> &Cond, 1146c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &TailCall) const { 1147c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1148c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1149c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1150c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Replace the conditional branch in MBB with a conditional tail call. 1151c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void replaceBranchWithTailCall(MachineBasicBlock &MBB, 1152c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SmallVectorImpl<MachineOperand> &Cond, 1153c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &TailCall) const { 1154c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target didn't implement replaceBranchWithTailCall!"); 1155c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1156c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1157c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Convert the instruction into a predicated instruction. 1158c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// It returns true if the operation was successful. 1159c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool PredicateInstruction(MachineInstr &MI, 1160c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot ArrayRef<MachineOperand> Pred) const; 1161c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1162c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns true if the first specified predicate 1163c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// subsumes the second, e.g. GE subsumes GT. 1164c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool SubsumesPredicate(ArrayRef<MachineOperand> Pred1, 1165c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot ArrayRef<MachineOperand> Pred2) const { 1166c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1167c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1168c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1169c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If the specified instruction defines any predicate 1170c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// or condition code register(s) used for predication, returns true as well 1171c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// as the definition predicate(s) by reference. 1172c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool DefinesPredicate(MachineInstr &MI, 1173c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot std::vector<MachineOperand> &Pred) const { 1174c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1175c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1176c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1177c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if the specified instruction can be predicated. 1178c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// By default, this returns true for every instruction with a 1179c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// PredicateOperand. 1180c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isPredicable(const MachineInstr &MI) const { 1181c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return MI.getDesc().isPredicable(); 1182c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1183c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1184c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if it's safe to move a machine 1185c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instruction that defines the specified register class. 1186c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isSafeToMoveRegClassDefs(const TargetRegisterClass *RC) const { 1187c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return true; 1188c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1189c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1190c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Test if the given instruction should be considered a scheduling boundary. 1191c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This primarily includes labels and terminators. 1192c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isSchedulingBoundary(const MachineInstr &MI, 1193c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineBasicBlock *MBB, 1194c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineFunction &MF) const; 1195c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1196c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Measure the specified inline asm to determine an approximation of its 1197c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// length. 1198c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned getInlineAsmLength(const char *Str, 1199c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MCAsmInfo &MAI) const; 1200c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1201c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Allocate and return a hazard recognizer to use for this target when 1202c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// scheduling the machine instructions before register allocation. 1203c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual ScheduleHazardRecognizer * 1204c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot CreateTargetHazardRecognizer(const TargetSubtargetInfo *STI, 1205c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const ScheduleDAG *DAG) const; 1206c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1207c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Allocate and return a hazard recognizer to use for this target when 1208c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// scheduling the machine instructions before register allocation. 1209c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual ScheduleHazardRecognizer * 1210c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot CreateTargetMIHazardRecognizer(const InstrItineraryData *, 1211c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const ScheduleDAG *DAG) const; 1212c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1213c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Allocate and return a hazard recognizer to use for this target when 1214c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// scheduling the machine instructions after register allocation. 1215c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual ScheduleHazardRecognizer * 1216c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot CreateTargetPostRAHazardRecognizer(const InstrItineraryData *, 1217c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const ScheduleDAG *DAG) const; 1218c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1219c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Allocate and return a hazard recognizer to use for by non-scheduling 1220c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// passes. 1221c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual ScheduleHazardRecognizer * 1222c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot CreateTargetPostRAHazardRecognizer(const MachineFunction &MF) const { 1223c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return nullptr; 1224c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1225c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1226c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Provide a global flag for disabling the PreRA hazard recognizer that 1227c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// targets may choose to honor. 1228c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool usePreRAHazardRecognizer() const; 1229c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1230c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// For a comparison instruction, return the source registers 1231c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// in SrcReg and SrcReg2 if having two register operands, and the value it 1232c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// compares against in CmpValue. Return true if the comparison instruction 1233c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// can be analyzed. 1234c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool analyzeCompare(const MachineInstr &MI, unsigned &SrcReg, 1235c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned &SrcReg2, int &Mask, int &Value) const { 1236c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1237c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1238c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1239c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// See if the comparison instruction can be converted 1240c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// into something more efficient. E.g., on ARM most instructions can set the 1241c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// flags register, obviating the need for a separate CMP. 1242c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool optimizeCompareInstr(MachineInstr &CmpInstr, unsigned SrcReg, 1243c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned SrcReg2, int Mask, int Value, 1244c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineRegisterInfo *MRI) const { 1245c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1246c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1247c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool optimizeCondBranch(MachineInstr &MI) const { return false; } 1248c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1249c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Try to remove the load by folding it to a register operand at the use. 1250c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// We fold the load instructions if and only if the 1251c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// def and use are in the same BB. We only look at one load and see 1252c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// whether it can be folded into MI. FoldAsLoadDefReg is the virtual register 1253c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// defined by the load we are trying to fold. DefMI returns the machine 1254c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instruction that defines FoldAsLoadDefReg, and the function returns 1255c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the machine instruction generated due to folding. 1256c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineInstr *optimizeLoadInstr(MachineInstr &MI, 1257c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineRegisterInfo *MRI, 1258c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned &FoldAsLoadDefReg, 1259c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineInstr *&DefMI) const { 1260c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return nullptr; 1261c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1262c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1263c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 'Reg' is known to be defined by a move immediate instruction, 1264c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// try to fold the immediate into the use instruction. 1265c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If MRI->hasOneNonDBGUse(Reg) is true, and this function returns true, 1266c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// then the caller may assume that DefMI has been erased from its parent 1267c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// block. The caller may assume that it will not be erased by this 1268c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// function otherwise. 1269c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool FoldImmediate(MachineInstr &UseMI, MachineInstr &DefMI, 1270c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned Reg, MachineRegisterInfo *MRI) const { 1271c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1272c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1273c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1274c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return the number of u-operations the given machine 1275c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instruction will be decoded to on the target cpu. The itinerary's 1276c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// IssueWidth is the number of microops that can be dispatched each 1277c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// cycle. An instruction with zero microops takes no dispatch resources. 1278c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned getNumMicroOps(const InstrItineraryData *ItinData, 1279c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &MI) const; 1280c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1281c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true for pseudo instructions that don't consume any 1282c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// machine resources in their current form. These are common cases that the 1283c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// scheduler should consider free, rather than conservatively handling them 1284c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// as instructions with no itinerary. 1285c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool isZeroCost(unsigned Opcode) const { 1286c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return Opcode <= TargetOpcode::COPY; 1287c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1288c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1289c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual int getOperandLatency(const InstrItineraryData *ItinData, 1290c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SDNode *DefNode, unsigned DefIdx, 1291c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SDNode *UseNode, unsigned UseIdx) const; 1292c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1293c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Compute and return the use operand latency of a given pair of def and use. 1294c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// In most cases, the static scheduling itinerary was enough to determine the 1295c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// operand latency. But it may not be possible for instructions with variable 1296c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// number of defs / uses. 1297c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1298c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This is a raw interface to the itinerary that may be directly overridden 1299c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// by a target. Use computeOperandLatency to get the best estimate of 1300c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// latency. 1301c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual int getOperandLatency(const InstrItineraryData *ItinData, 1302c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &DefMI, unsigned DefIdx, 1303c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &UseMI, 1304c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned UseIdx) const; 1305c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1306c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Compute the instruction latency of a given instruction. 1307c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If the instruction has higher cost when predicated, it's returned via 1308c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// PredCost. 1309c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned getInstrLatency(const InstrItineraryData *ItinData, 1310c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &MI, 1311c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned *PredCost = nullptr) const; 1312c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1313c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned getPredicationCost(const MachineInstr &MI) const; 1314c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1315c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual int getInstrLatency(const InstrItineraryData *ItinData, 1316c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot SDNode *Node) const; 1317c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1318c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return the default expected latency for a def based on its opcode. 1319c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned defaultDefLatency(const MCSchedModel &SchedModel, 1320c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &DefMI) const; 1321c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1322c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot int computeDefOperandLatency(const InstrItineraryData *ItinData, 1323c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &DefMI) const; 1324c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1325c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if this opcode has high latency to its result. 1326c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isHighLatencyDef(int opc) const { return false; } 1327c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1328c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Compute operand latency between a def of 'Reg' 1329c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// and a use in the current loop. Return true if the target considered 1330c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// it 'high'. This is used by optimization passes such as machine LICM to 1331c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// determine whether it makes sense to hoist an instruction out even in a 1332c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// high register pressure situation. 1333c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool hasHighOperandLatency(const TargetSchedModel &SchedModel, 1334c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineRegisterInfo *MRI, 1335c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &DefMI, unsigned DefIdx, 1336c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &UseMI, 1337c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned UseIdx) const { 1338c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1339c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1340c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1341c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Compute operand latency of a def of 'Reg'. Return true 1342c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// if the target considered it 'low'. 1343c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool hasLowDefLatency(const TargetSchedModel &SchedModel, 1344c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineInstr &DefMI, 1345c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned DefIdx) const; 1346c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1347c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Perform target-specific instruction verification. 1348c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool verifyInstruction(const MachineInstr &MI, 1349c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot StringRef &ErrInfo) const { 1350c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return true; 1351c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1352c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1353c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return the current execution domain and bit mask of 1354c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// possible domains for instruction. 1355c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1356c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Some micro-architectures have multiple execution domains, and multiple 1357c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// opcodes that perform the same operation in different domains. For 1358c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// example, the x86 architecture provides the por, orps, and orpd 1359c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instructions that all do the same thing. There is a latency penalty if a 1360c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// register is written in one domain and read in another. 1361c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1362c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This function returns a pair (domain, mask) containing the execution 1363c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// domain of MI, and a bit mask of possible domains. The setExecutionDomain 1364c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// function can be used to change the opcode to one of the domains in the 1365c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// bit mask. Instructions whose execution domain can't be changed should 1366c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// return a 0 mask. 1367c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1368c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The execution domain numbers don't have any special meaning except domain 1369c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 0 is used for instructions that are not associated with any interesting 1370c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// execution domain. 1371c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1372c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual std::pair<uint16_t, uint16_t> 1373c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getExecutionDomain(const MachineInstr &MI) const { 1374c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return std::make_pair(0, 0); 1375c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1376c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1377c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Change the opcode of MI to execute in Domain. 1378c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1379c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The bit (1 << Domain) must be set in the mask returned from 1380c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// getExecutionDomain(MI). 1381c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void setExecutionDomain(MachineInstr &MI, unsigned Domain) const {} 1382c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1383c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns the preferred minimum clearance 1384c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// before an instruction with an unwanted partial register update. 1385c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1386c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Some instructions only write part of a register, and implicitly need to 1387c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// read the other parts of the register. This may cause unwanted stalls 1388c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// preventing otherwise unrelated instructions from executing in parallel in 1389c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// an out-of-order CPU. 1390c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1391c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// For example, the x86 instruction cvtsi2ss writes its result to bits 1392c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// [31:0] of the destination xmm register. Bits [127:32] are unaffected, so 1393c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the instruction needs to wait for the old value of the register to become 1394c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// available: 1395c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1396c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// addps %xmm1, %xmm0 1397c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// movaps %xmm0, (%rax) 1398c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// cvtsi2ss %rbx, %xmm0 1399c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1400c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// In the code above, the cvtsi2ss instruction needs to wait for the addps 1401c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instruction before it can issue, even though the high bits of %xmm0 1402c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// probably aren't needed. 1403c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1404c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This hook returns the preferred clearance before MI, measured in 1405c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instructions. Other defs of MI's operand OpNum are avoided in the last N 1406c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instructions before MI. It should only return a positive value for 1407c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// unwanted dependencies. If the old bits of the defined register have 1408c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// useful values, or if MI is determined to otherwise read the dependency, 1409c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the hook should return 0. 1410c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1411c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// The unwanted dependency may be handled by: 1412c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1413c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1. Allocating the same register for an MI def and use. That makes the 1414c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// unwanted dependency identical to a required dependency. 1415c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1416c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 2. Allocating a register for the def that has no defs in the previous N 1417c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// instructions. 1418c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1419c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 3. Calling breakPartialRegDependency() with the same arguments. This 1420c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// allows the target to insert a dependency breaking instruction. 1421c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1422c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned 1423c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getPartialRegUpdateClearance(const MachineInstr &MI, unsigned OpNum, 1424c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterInfo *TRI) const { 1425c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot // The default implementation returns 0 for no partial register dependency. 1426c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return 0; 1427c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1428c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1429c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Return the minimum clearance before an instruction that reads an 1430c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// unused register. 1431c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1432c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// For example, AVX instructions may copy part of a register operand into 1433c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// the unused high bits of the destination register. 1434c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1435c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// vcvtsi2sdq %rax, %xmm0<undef>, %xmm14 1436c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1437c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// In the code above, vcvtsi2sdq copies %xmm0[127:64] into %xmm14 creating a 1438c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// false dependence on any previous write to %xmm0. 1439c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1440c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This hook works similarly to getPartialRegUpdateClearance, except that it 1441c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// does not take an operand index. Instead sets \p OpNum to the index of the 1442c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// unused register. 1443c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned getUndefRegClearance(const MachineInstr &MI, unsigned &OpNum, 1444c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterInfo *TRI) const { 1445c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot // The default implementation returns 0 for no undef register dependency. 1446c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return 0; 1447c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1448c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1449c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Insert a dependency-breaking instruction 1450c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// before MI to eliminate an unwanted dependency on OpNum. 1451c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1452c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// If it wasn't possible to avoid a def in the last N instructions before MI 1453c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// (see getPartialRegUpdateClearance), this hook will be called to break the 1454c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// unwanted dependency. 1455c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1456c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// On x86, an xorps instruction can be used as a dependency breaker: 1457c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1458c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// addps %xmm1, %xmm0 1459c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// movaps %xmm0, (%rax) 1460c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// xorps %xmm0, %xmm0 1461c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// cvtsi2ss %rbx, %xmm0 1462c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1463c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// An <imp-kill> operand should be added to MI if an instruction was 1464c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// inserted. This ties the instructions together in the post-ra scheduler. 1465c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1466c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void breakPartialRegDependency(MachineInstr &MI, unsigned OpNum, 1467c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetRegisterInfo *TRI) const {} 1468c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1469c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Create machine specific model for scheduling. 1470c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual DFAPacketizer * 1471c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot CreateTargetScheduleState(const TargetSubtargetInfo &) const { 1472c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return nullptr; 1473c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1474c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1475c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Sometimes, it is possible for the target 1476c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// to tell, even without aliasing information, that two MIs access different 1477c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// memory addresses. This function returns true if two MIs access different 1478c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// memory addresses and false otherwise. 1479c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1480c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Assumes any physical registers used to compute addresses have the same 1481c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// value for both instructions. (This is the most useful assumption for 1482c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// post-RA scheduling.) 1483c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1484c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// See also MachineInstr::mayAlias, which is implemented on top of this 1485c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// function. 1486c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool 1487c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot areMemAccessesTriviallyDisjoint(MachineInstr &MIa, MachineInstr &MIb, 1488c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot AliasAnalysis *AA = nullptr) const { 1489c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot assert((MIa.mayLoad() || MIa.mayStore()) && 1490c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "MIa must load from or modify a memory location"); 1491c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot assert((MIb.mayLoad() || MIb.mayStore()) && 1492c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "MIb must load from or modify a memory location"); 1493c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1494c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1495c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1496c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Return the value to use for the MachineCSE's LookAheadLimit, 1497c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// which is a heuristic used for CSE'ing phys reg defs. 1498c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual unsigned getMachineCSELookAheadLimit() const { 1499c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot // The default lookahead is small to prevent unprofitable quadratic 1500c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot // behavior. 1501c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return 5; 1502c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1503c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1504c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return an array that contains the ids of the target indices (used for the 1505c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// TargetIndex machine operand) and their names. 1506c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1507c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MIR Serialization is able to serialize only the target indices that are 1508c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// defined by this method. 1509c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual ArrayRef<std::pair<int, const char *>> 1510c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getSerializableTargetIndices() const { 1511c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return None; 1512c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1513c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1514c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Decompose the machine operand's target flags into two values - the direct 1515c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// target flag value and any of bit flags that are applied. 1516c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual std::pair<unsigned, unsigned> 1517c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot decomposeMachineOperandsTargetFlags(unsigned /*TF*/) const { 1518c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return std::make_pair(0u, 0u); 1519c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1520c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1521c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return an array that contains the direct target flag values and their 1522c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// names. 1523c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1524c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MIR Serialization is able to serialize only the target flags that are 1525c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// defined by this method. 1526c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual ArrayRef<std::pair<unsigned, const char *>> 1527c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getSerializableDirectMachineOperandTargetFlags() const { 1528c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return None; 1529c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1530c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1531c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return an array that contains the bitmask target flag values and their 1532c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// names. 1533c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1534c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MIR Serialization is able to serialize only the target flags that are 1535c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// defined by this method. 1536c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual ArrayRef<std::pair<unsigned, const char *>> 1537c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getSerializableBitmaskMachineOperandTargetFlags() const { 1538c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return None; 1539c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1540c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1541c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return an array that contains the MMO target flag values and their 1542c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// names. 1543c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// 1544c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// MIR Serialization is able to serialize only the MMO target flags that are 1545c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// defined by this method. 1546c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual ArrayRef<std::pair<MachineMemOperand::Flags, const char *>> 1547c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot getSerializableMachineMemOperandTargetFlags() const { 1548c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return None; 1549c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1550c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1551c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Determines whether \p Inst is a tail call instruction. Override this 1552c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// method on targets that do not properly set MCID::Return and MCID::Call on 1553c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// tail call instructions." 1554c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isTailCall(const MachineInstr &Inst) const { 1555c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return Inst.isReturn() && Inst.isCall(); 1556c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1557c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1558c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// True if the instruction is bound to the top of its basic block and no 1559c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// other instructions shall be inserted before it. This can be implemented 1560c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// to prevent register allocator to insert spills before such instructions. 1561c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isBasicBlockPrologue(const MachineInstr &MI) const { 1562c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return false; 1563c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1564c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1565c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Describes the number of instructions that it will take to call and 1566c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// construct a frame for a given outlining candidate. 1567c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot struct MachineOutlinerInfo { 1568c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Number of instructions to call an outlined function for this candidate. 1569c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned CallOverhead; 1570c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1571c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Number of instructions to construct an outlined function frame 1572c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// for this candidate. 1573c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned FrameOverhead; 1574c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1575c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Represents the specific instructions that must be emitted to 1576c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// construct a call to this candidate. 1577c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned CallConstructionID; 1578c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1579c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Represents the specific instructions that must be emitted to 1580c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// construct a frame for this candidate's outlined function. 1581c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned FrameConstructionID; 1582c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1583c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineOutlinerInfo() {} 1584c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineOutlinerInfo(unsigned CallOverhead, unsigned FrameOverhead, 1585c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned CallConstructionID, 1586c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned FrameConstructionID) 1587c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot : CallOverhead(CallOverhead), FrameOverhead(FrameOverhead), 1588c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot CallConstructionID(CallConstructionID), 1589c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot FrameConstructionID(FrameConstructionID) {} 1590c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot }; 1591c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1592c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Returns a \p MachineOutlinerInfo struct containing target-specific 1593c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// information for a set of outlining candidates. 1594c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineOutlinerInfo getOutlininingCandidateInfo( 1595c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot std::vector< 1596c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot std::pair<MachineBasicBlock::iterator, MachineBasicBlock::iterator>> 1597c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot &RepeatedSequenceLocs) const { 1598c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable( 1599c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "Target didn't implement TargetInstrInfo::getOutliningOverhead!"); 1600c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1601c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1602c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Represents how an instruction should be mapped by the outliner. 1603c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \p Legal instructions are those which are safe to outline. 1604c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \p Illegal instructions are those which cannot be outlined. 1605c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \p Invisible instructions are instructions which can be outlined, but 1606c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// shouldn't actually impact the outlining result. 1607c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot enum MachineOutlinerInstrType { Legal, Illegal, Invisible }; 1608c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1609c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns how or if \p MI should be outlined. 1610c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineOutlinerInstrType getOutliningType(MachineInstr &MI) const { 1611c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable( 1612c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "Target didn't implement TargetInstrInfo::getOutliningType!"); 1613c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1614c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1615c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Insert a custom epilogue for outlined functions. 1616c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This may be empty, in which case no epilogue or return statement will be 1617c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// emitted. 1618c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void insertOutlinerEpilogue(MachineBasicBlock &MBB, 1619c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineFunction &MF, 1620c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineOutlinerInfo &MInfo) const { 1621c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable( 1622c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "Target didn't implement TargetInstrInfo::insertOutlinerEpilogue!"); 1623c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1624c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1625c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Insert a call to an outlined function into the program. 1626c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Returns an iterator to the spot where we inserted the call. This must be 1627c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// implemented by the target. 1628c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual MachineBasicBlock::iterator 1629c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot insertOutlinedCall(Module &M, MachineBasicBlock &MBB, 1630c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineBasicBlock::iterator &It, MachineFunction &MF, 1631c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineOutlinerInfo &MInfo) const { 1632c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable( 1633c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "Target didn't implement TargetInstrInfo::insertOutlinedCall!"); 1634c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1635c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1636c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Insert a custom prologue for outlined functions. 1637c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// This may be empty, in which case no prologue will be emitted. 1638c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual void insertOutlinerPrologue(MachineBasicBlock &MBB, 1639c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot MachineFunction &MF, 1640c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const MachineOutlinerInfo &MInfo) const { 1641c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable( 1642c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "Target didn't implement TargetInstrInfo::insertOutlinerPrologue!"); 1643c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1644c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1645c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// Return true if the function can safely be outlined from. 1646c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// A function \p MF is considered safe for outlining if an outlined function 1647c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// produced from instructions in F will produce a program which produces the 1648c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// same output for any set of given inputs. 1649c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot virtual bool isFunctionSafeToOutlineFrom(MachineFunction &MF, 1650c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot bool OutlineFromLinkOnceODRs) const { 1651c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot llvm_unreachable("Target didn't implement " 1652c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot "TargetInstrInfo::isFunctionSafeToOutlineFrom!"); 1653c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1654c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1655c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robotprivate: 1656c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned CallFrameSetupOpcode, CallFrameDestroyOpcode; 1657c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned CatchRetOpcode; 1658c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot unsigned ReturnOpcode; 1659c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot}; 1660c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1661c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot/// \brief Provide DenseMapInfo for TargetInstrInfo::RegSubRegPair. 1662c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robottemplate <> struct DenseMapInfo<TargetInstrInfo::RegSubRegPair> { 1663c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot using RegInfo = DenseMapInfo<unsigned>; 1664c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1665c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot static inline TargetInstrInfo::RegSubRegPair getEmptyKey() { 1666c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return TargetInstrInfo::RegSubRegPair(RegInfo::getEmptyKey(), 1667c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegInfo::getEmptyKey()); 1668c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1669c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1670c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot static inline TargetInstrInfo::RegSubRegPair getTombstoneKey() { 1671c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return TargetInstrInfo::RegSubRegPair(RegInfo::getTombstoneKey(), 1672c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegInfo::getTombstoneKey()); 1673c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1674c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1675c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// \brief Reuse getHashValue implementation from 1676c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot /// std::pair<unsigned, unsigned>. 1677c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot static unsigned getHashValue(const TargetInstrInfo::RegSubRegPair &Val) { 1678c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot std::pair<unsigned, unsigned> PairVal = std::make_pair(Val.Reg, Val.SubReg); 1679c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return DenseMapInfo<std::pair<unsigned, unsigned>>::getHashValue(PairVal); 1680c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1681c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1682c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot static bool isEqual(const TargetInstrInfo::RegSubRegPair &LHS, 1683c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot const TargetInstrInfo::RegSubRegPair &RHS) { 1684c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot return RegInfo::isEqual(LHS.Reg, RHS.Reg) && 1685c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot RegInfo::isEqual(LHS.SubReg, RHS.SubReg); 1686c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot } 1687c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot}; 1688c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1689c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot} // end namespace llvm 1690c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot 1691c9cc9e7d29b8970d8ddb734c88fb62d01e0b727android-build-team Robot#endif // LLVM_TARGET_TARGETINSTRINFO_H 1692