LLVM  13.0.0git
Macros | Enumerations | Functions | Variables
AArch64InstrInfo.cpp File Reference
#include "AArch64InstrInfo.h"
#include "AArch64MachineFunctionInfo.h"
#include "AArch64Subtarget.h"
#include "MCTargetDesc/AArch64AddressingModes.h"
#include "Utils/AArch64BaseInfo.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineMemOperand.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/StackMaps.h"
#include "llvm/CodeGen/TargetRegisterInfo.h"
#include "llvm/CodeGen/TargetSubtargetInfo.h"
#include "llvm/IR/DebugInfoMetadata.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/CodeGen.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <cassert>
#include <cstdint>
#include <iterator>
#include <utility>
#include "AArch64GenInstrInfo.inc"
Include dependency graph for AArch64InstrInfo.cpp:

Go to the source code of this file.

Macros

#define GET_INSTRINFO_CTOR_DTOR
 
#define GET_INSTRINFO_HELPERS
 
#define GET_INSTRMAP_INFO
 

Enumerations

enum  AccessKind { AK_Write = 0x01, AK_Read = 0x10, AK_All = 0x11 }
 
enum  FMAInstKind { FMAInstKind::Default, FMAInstKind::Indexed, FMAInstKind::Accumulator }
 
enum  MachineOutlinerClass {
  MachineOutlinerDefault, MachineOutlinerTailCall, MachineOutlinerNoLRSave, MachineOutlinerThunk,
  MachineOutlinerRegSave, MachineOutlinerTailCall, MachineOutlinerThunk, MachineOutlinerNoLRSave,
  MachineOutlinerRegSave, MachineOutlinerDefault, MachineOutlinerDefault, MachineOutlinerTailCall
}
 Constants defining how certain sequences should be outlined. More...
 
enum  MachineOutlinerMBBFlags {
  LRUnavailableSomewhere = 0x2, HasCalls = 0x4, UnsafeRegsDead = 0x8, LRUnavailableSomewhere = 0x2,
  HasCalls = 0x4, UnsafeRegsDead = 0x8
}
 

Functions

static void parseCondBranch (MachineInstr *LastInst, MachineBasicBlock *&Target, SmallVectorImpl< MachineOperand > &Cond)
 
static unsigned getBranchDisplacementBits (unsigned Opc)
 
static unsigned removeCopies (const MachineRegisterInfo &MRI, unsigned VReg)
 
static unsigned canFoldIntoCSel (const MachineRegisterInfo &MRI, unsigned VReg, unsigned *NewVReg=nullptr)
 
static bool canBeExpandedToORR (const MachineInstr &MI, unsigned BitSize)
 Returns true if a MOVi32imm or MOVi64imm can be expanded to an ORRxx. More...
 
static bool UpdateOperandRegClass (MachineInstr &Instr)
 
static unsigned convertToNonFlagSettingOpc (const MachineInstr &MI)
 Return the opcode that does not set flags when possible - otherwise return the original opcode. More...
 
static bool areCFlagsAccessedBetweenInstrs (MachineBasicBlock::iterator From, MachineBasicBlock::iterator To, const TargetRegisterInfo *TRI, const AccessKind AccessToCheck=AK_All)
 True when condition flags are accessed (either by writing or reading) on the instruction trace starting at From and ending at To. More...
 
static unsigned sForm (MachineInstr &Instr)
 Get opcode of S version of Instr. More...
 
static bool areCFlagsAliveInSuccessors (MachineBasicBlock *MBB)
 Check if AArch64::NZCV should be alive in successors of MBB. More...
 
static AArch64CC::CondCode findCondCodeUsedByInstr (const MachineInstr &Instr)
 Find a condition code used by the instruction. More...
 
static UsedNZCV getUsedNZCV (AArch64CC::CondCode CC)
 
static bool isADDSRegImm (unsigned Opcode)
 
static bool isSUBSRegImm (unsigned Opcode)
 
static bool canInstrSubstituteCmpInstr (MachineInstr *MI, MachineInstr *CmpInstr, const TargetRegisterInfo *TRI)
 Check if CmpInstr can be substituted by MI. More...
 
static bool scaleOffset (unsigned Opc, int64_t &Offset)
 
static bool canPairLdStOpc (unsigned FirstOpc, unsigned SecondOpc)
 
static bool shouldClusterFI (const MachineFrameInfo &MFI, int FI1, int64_t Offset1, unsigned Opcode1, int FI2, int64_t Offset2, unsigned Opcode2)
 
static const MachineInstrBuilderAddSubReg (const MachineInstrBuilder &MIB, unsigned Reg, unsigned SubIdx, unsigned State, const TargetRegisterInfo *TRI)
 
static bool forwardCopyWillClobberTuple (unsigned DestReg, unsigned SrcReg, unsigned NumRegs)
 
static void storeRegPairToStackSlot (const TargetRegisterInfo &TRI, MachineBasicBlock &MBB, MachineBasicBlock::iterator InsertBefore, const MCInstrDesc &MCID, Register SrcReg, bool IsKill, unsigned SubIdx0, unsigned SubIdx1, int FI, MachineMemOperand *MMO)
 
static void loadRegPairFromStackSlot (const TargetRegisterInfo &TRI, MachineBasicBlock &MBB, MachineBasicBlock::iterator InsertBefore, const MCInstrDesc &MCID, Register DestReg, unsigned SubIdx0, unsigned SubIdx1, int FI, MachineMemOperand *MMO)
 
static void emitFrameOffsetAdj (MachineBasicBlock &MBB, MachineBasicBlock::iterator MBBI, const DebugLoc &DL, unsigned DestReg, unsigned SrcReg, int64_t Offset, unsigned Opc, const TargetInstrInfo *TII, MachineInstr::MIFlag Flag, bool NeedsWinCFI, bool *HasWinCFI)
 
static bool isCombineInstrSettingFlag (unsigned Opc)
 
static bool isCombineInstrCandidate32 (unsigned Opc)
 
static bool isCombineInstrCandidate64 (unsigned Opc)
 
static bool isCombineInstrCandidateFP (const MachineInstr &Inst)
 
static bool isCombineInstrCandidate (unsigned Opc)
 
static bool canCombine (MachineBasicBlock &MBB, MachineOperand &MO, unsigned CombineOpc, unsigned ZeroReg=0, bool CheckZeroReg=false)
 
static bool canCombineWithMUL (MachineBasicBlock &MBB, MachineOperand &MO, unsigned MulOpc, unsigned ZeroReg)
 
static bool canCombineWithFMUL (MachineBasicBlock &MBB, MachineOperand &MO, unsigned MulOpc)
 
static bool getMaddPatterns (MachineInstr &Root, SmallVectorImpl< MachineCombinerPattern > &Patterns)
 Find instructions that can be turned into madd. More...
 
static bool getFMAPatterns (MachineInstr &Root, SmallVectorImpl< MachineCombinerPattern > &Patterns)
 Floating-Point Support. More...
 
static MachineInstrgenFusedMultiply (MachineFunction &MF, MachineRegisterInfo &MRI, const TargetInstrInfo *TII, MachineInstr &Root, SmallVectorImpl< MachineInstr * > &InsInstrs, unsigned IdxMulOpd, unsigned MaddOpc, const TargetRegisterClass *RC, FMAInstKind kind=FMAInstKind::Default, const Register *ReplacedAddend=nullptr)
 genFusedMultiply - Generate fused multiply instructions. More...
 
static MachineInstrgenFusedMultiplyAcc (MachineFunction &MF, MachineRegisterInfo &MRI, const TargetInstrInfo *TII, MachineInstr &Root, SmallVectorImpl< MachineInstr * > &InsInstrs, unsigned IdxMulOpd, unsigned MaddOpc, const TargetRegisterClass *RC)
 genFusedMultiplyAcc - Helper to generate fused multiply accumulate instructions. More...
 
static Register genNeg (MachineFunction &MF, MachineRegisterInfo &MRI, const TargetInstrInfo *TII, MachineInstr &Root, SmallVectorImpl< MachineInstr * > &InsInstrs, DenseMap< unsigned, unsigned > &InstrIdxForVirtReg, unsigned MnegOpc, const TargetRegisterClass *RC)
 genNeg - Helper to generate an intermediate negation of the second operand of Root More...
 
static MachineInstrgenFusedMultiplyAccNeg (MachineFunction &MF, MachineRegisterInfo &MRI, const TargetInstrInfo *TII, MachineInstr &Root, SmallVectorImpl< MachineInstr * > &InsInstrs, DenseMap< unsigned, unsigned > &InstrIdxForVirtReg, unsigned IdxMulOpd, unsigned MaddOpc, unsigned MnegOpc, const TargetRegisterClass *RC)
 genFusedMultiplyAccNeg - Helper to generate fused multiply accumulate instructions with an additional negation of the accumulator More...
 
static MachineInstrgenFusedMultiplyIdx (MachineFunction &MF, MachineRegisterInfo &MRI, const TargetInstrInfo *TII, MachineInstr &Root, SmallVectorImpl< MachineInstr * > &InsInstrs, unsigned IdxMulOpd, unsigned MaddOpc, const TargetRegisterClass *RC)
 genFusedMultiplyIdx - Helper to generate fused multiply accumulate instructions. More...
 
static MachineInstrgenFusedMultiplyIdxNeg (MachineFunction &MF, MachineRegisterInfo &MRI, const TargetInstrInfo *TII, MachineInstr &Root, SmallVectorImpl< MachineInstr * > &InsInstrs, DenseMap< unsigned, unsigned > &InstrIdxForVirtReg, unsigned IdxMulOpd, unsigned MaddOpc, unsigned MnegOpc, const TargetRegisterClass *RC)
 genFusedMultiplyAccNeg - Helper to generate fused multiply accumulate instructions with an additional negation of the accumulator More...
 
static MachineInstrgenMaddR (MachineFunction &MF, MachineRegisterInfo &MRI, const TargetInstrInfo *TII, MachineInstr &Root, SmallVectorImpl< MachineInstr * > &InsInstrs, unsigned IdxMulOpd, unsigned MaddOpc, unsigned VR, const TargetRegisterClass *RC)
 genMaddR - Generate madd instruction and combine mul and add using an extra virtual register Example - an ADD intermediate needs to be stored in a register: MUL I=A,B,0 ADD R,I,Imm ==> ORR V, ZR, Imm ==> MADD R,A,B,V More...
 
static bool outliningCandidatesSigningScopeConsensus (const outliner::Candidate &a, const outliner::Candidate &b)
 
static bool outliningCandidatesSigningKeyConsensus (const outliner::Candidate &a, const outliner::Candidate &b)
 
static bool outliningCandidatesV8_3OpsConsensus (const outliner::Candidate &a, const outliner::Candidate &b)
 
static void signOutlinedFunction (MachineFunction &MF, MachineBasicBlock &MBB, bool ShouldSignReturnAddr, bool ShouldSignReturnAddrWithAKey)
 
static Optional< ParamLoadedValuedescribeORRLoadedValue (const MachineInstr &MI, Register DescribedReg, const TargetInstrInfo *TII, const TargetRegisterInfo *TRI)
 If the given ORR instruction is a copy, and DescribedReg overlaps with the destination register then, if possible, describe the value in terms of the source register. More...
 

Variables

static cl::opt< unsigned > TBZDisplacementBits ("aarch64-tbz-offset-bits", cl::Hidden, cl::init(14), cl::desc("Restrict range of TB[N]Z instructions (DEBUG)"))
 
static cl::opt< unsigned > CBZDisplacementBits ("aarch64-cbz-offset-bits", cl::Hidden, cl::init(19), cl::desc("Restrict range of CB[N]Z instructions (DEBUG)"))
 
static cl::opt< unsigned > BCCDisplacementBits ("aarch64-bcc-offset-bits", cl::Hidden, cl::init(19), cl::desc("Restrict range of Bcc instructions (DEBUG)"))
 

Macro Definition Documentation

◆ GET_INSTRINFO_CTOR_DTOR

#define GET_INSTRINFO_CTOR_DTOR

Definition at line 55 of file AArch64InstrInfo.cpp.

◆ GET_INSTRINFO_HELPERS

#define GET_INSTRINFO_HELPERS

Definition at line 7218 of file AArch64InstrInfo.cpp.

◆ GET_INSTRMAP_INFO

#define GET_INSTRMAP_INFO

Definition at line 7219 of file AArch64InstrInfo.cpp.

Enumeration Type Documentation

◆ AccessKind

enum AccessKind
Enumerator
AK_Write 
AK_Read 
AK_All 

Definition at line 1265 of file AArch64InstrInfo.cpp.

◆ FMAInstKind

enum FMAInstKind
strong
Enumerator
Default 
Indexed 
Accumulator 

Definition at line 4654 of file AArch64InstrInfo.cpp.

◆ MachineOutlinerClass

Constants defining how certain sequences should be outlined.

This encompasses how an outlined function should be called, and what kind of frame should be emitted for that outlined function.

MachineOutlinerDefault implies that the function should be called with a save and restore of LR to the stack.

That is,

I1 Save LR OUTLINED_FUNCTION: I2 --> BL OUTLINED_FUNCTION I1 I3 Restore LR I2 I3 RET

  • Call construction overhead: 3 (save + BL + restore)
  • Frame construction overhead: 1 (ret)
  • Requires stack fixups? Yes

MachineOutlinerTailCall implies that the function is being created from a sequence of instructions ending in a return.

That is,

I1 OUTLINED_FUNCTION: I2 --> B OUTLINED_FUNCTION I1 RET I2 RET

  • Call construction overhead: 1 (B)
  • Frame construction overhead: 0 (Return included in sequence)
  • Requires stack fixups? No

MachineOutlinerNoLRSave implies that the function should be called using a BL instruction, but doesn't require LR to be saved and restored. This happens when LR is known to be dead.

That is,

I1 OUTLINED_FUNCTION: I2 --> BL OUTLINED_FUNCTION I1 I3 I2 I3 RET

  • Call construction overhead: 1 (BL)
  • Frame construction overhead: 1 (RET)
  • Requires stack fixups? No

MachineOutlinerThunk implies that the function is being created from a sequence of instructions ending in a call. The outlined function is called with a BL instruction, and the outlined function tail-calls the original call destination.

That is,

I1 OUTLINED_FUNCTION: I2 --> BL OUTLINED_FUNCTION I1 BL f I2 B f

  • Call construction overhead: 1 (BL)
  • Frame construction overhead: 0
  • Requires stack fixups? No

MachineOutlinerRegSave implies that the function should be called with a save and restore of LR to an available register. This allows us to avoid stack fixups. Note that this outlining variant is compatible with the NoLRSave case.

That is,

I1 Save LR OUTLINED_FUNCTION: I2 --> BL OUTLINED_FUNCTION I1 I3 Restore LR I2 I3 RET

  • Call construction overhead: 3 (save + BL + restore)
  • Frame construction overhead: 1 (ret)
  • Requires stack fixups? No
Enumerator
MachineOutlinerDefault 
MachineOutlinerTailCall 

Emit a save, restore, call, and return.

MachineOutlinerNoLRSave 

Only emit a branch.

MachineOutlinerThunk 

Emit a call and return.

MachineOutlinerRegSave 

Emit a call and tail-call.

Same as default, but save to a register.

MachineOutlinerTailCall 
MachineOutlinerThunk 
MachineOutlinerNoLRSave 
MachineOutlinerRegSave 
MachineOutlinerDefault 
MachineOutlinerDefault 
MachineOutlinerTailCall 

Definition at line 5998 of file AArch64InstrInfo.cpp.

◆ MachineOutlinerMBBFlags

Enumerator
LRUnavailableSomewhere 
HasCalls 
UnsafeRegsDead 
LRUnavailableSomewhere 
HasCalls 
UnsafeRegsDead 

Definition at line 6006 of file AArch64InstrInfo.cpp.

Function Documentation

◆ AddSubReg()

static const MachineInstrBuilder& AddSubReg ( const MachineInstrBuilder MIB,
unsigned  Reg,
unsigned  SubIdx,
unsigned  State,
const TargetRegisterInfo TRI 
)
static

◆ areCFlagsAccessedBetweenInstrs()

static bool areCFlagsAccessedBetweenInstrs ( MachineBasicBlock::iterator  From,
MachineBasicBlock::iterator  To,
const TargetRegisterInfo TRI,
const AccessKind  AccessToCheck = AK_All 
)
static

True when condition flags are accessed (either by writing or reading) on the instruction trace starting at From and ending at To.

Note: If From and To are from different blocks it's assumed CC are accessed on the path.

Definition at line 1272 of file AArch64InstrInfo.cpp.

References AK_Read, AK_Write, llvm::any_of(), assert(), From, llvm::MachineInstrBundleIterator< Ty, IsReverse >::getReverse(), llvm::instructionsWithoutDebug(), MI, and TRI.

Referenced by canInstrSubstituteCmpInstr(), and llvm::AArch64InstrInfo::optimizeCondBranch().

◆ areCFlagsAliveInSuccessors()

static bool areCFlagsAliveInSuccessors ( MachineBasicBlock MBB)
static

Check if AArch64::NZCV should be alive in successors of MBB.

Definition at line 1527 of file AArch64InstrInfo.cpp.

References BB, MBB, and llvm::MachineBasicBlock::successors().

Referenced by canInstrSubstituteCmpInstr().

◆ canBeExpandedToORR()

static bool canBeExpandedToORR ( const MachineInstr MI,
unsigned  BitSize 
)
static

Returns true if a MOVi32imm or MOVi64imm can be expanded to an ORRxx.

Definition at line 794 of file AArch64InstrInfo.cpp.

References MI, and llvm::AArch64_AM::processLogicalImmediate().

Referenced by llvm::AArch64InstrInfo::isAsCheapAsAMove().

◆ canCombine()

static bool canCombine ( MachineBasicBlock MBB,
MachineOperand MO,
unsigned  CombineOpc,
unsigned  ZeroReg = 0,
bool  CheckZeroReg = false 
)
static

◆ canCombineWithFMUL()

static bool canCombineWithFMUL ( MachineBasicBlock MBB,
MachineOperand MO,
unsigned  MulOpc 
)
static

Definition at line 4210 of file AArch64InstrInfo.cpp.

References canCombine(), and MBB.

Referenced by getFMAPatterns().

◆ canCombineWithMUL()

static bool canCombineWithMUL ( MachineBasicBlock MBB,
MachineOperand MO,
unsigned  MulOpc,
unsigned  ZeroReg 
)
static

Definition at line 4203 of file AArch64InstrInfo.cpp.

References canCombine(), and MBB.

Referenced by getMaddPatterns().

◆ canFoldIntoCSel()

static unsigned canFoldIntoCSel ( const MachineRegisterInfo MRI,
unsigned  VReg,
unsigned *  NewVReg = nullptr 
)
static

◆ canInstrSubstituteCmpInstr()

static bool canInstrSubstituteCmpInstr ( MachineInstr MI,
MachineInstr CmpInstr,
const TargetRegisterInfo TRI 
)
static

Check if CmpInstr can be substituted by MI.

CmpInstr can be substituted:

  • CmpInstr is either 'ADDS vreg, 0' or 'SUBS vreg, 0'
  • and, MI and CmpInstr are from the same MachineBB
  • and, condition flags are not alive in successors of the CmpInstr parent
  • and, if MI opcode is the S form there must be no defs of flags between MI and CmpInstr or if MI opcode is not the S form there must be neither defs of flags nor uses of flags between MI and CmpInstr.
  • and C/V flags are not used after CmpInstr

Definition at line 1649 of file AArch64InstrInfo.cpp.

References AK_All, AK_Write, areCFlagsAccessedBetweenInstrs(), areCFlagsAliveInSuccessors(), assert(), findCondCodeUsedByInstr(), llvm::ilist_node_impl< OptionsT >::getIterator(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getParent(), getUsedNZCV(), llvm::MachineBasicBlock::instr_end(), llvm::instructionsWithoutDebug(), llvm::AArch64CC::Invalid, isADDSRegImm(), isSUBSRegImm(), MI, sForm(), and TRI.

◆ canPairLdStOpc()

static bool canPairLdStOpc ( unsigned  FirstOpc,
unsigned  SecondOpc 
)
static

Definition at line 2711 of file AArch64InstrInfo.cpp.

Referenced by llvm::AArch64InstrInfo::shouldClusterMemOps().

◆ convertToNonFlagSettingOpc()

static unsigned convertToNonFlagSettingOpc ( const MachineInstr MI)
static

Return the opcode that does not set flags when possible - otherwise return the original opcode.

The caller is responsible to do the actual substitution and legality checking.

Definition at line 1220 of file AArch64InstrInfo.cpp.

References MI.

Referenced by getMaddPatterns(), and llvm::AArch64InstrInfo::optimizeCompareInstr().

◆ describeORRLoadedValue()

static Optional<ParamLoadedValue> describeORRLoadedValue ( const MachineInstr MI,
Register  DescribedReg,
const TargetInstrInfo TII,
const TargetRegisterInfo TRI 
)
static

If the given ORR instruction is a copy, and DescribedReg overlaps with the destination register then, if possible, describe the value in terms of the source register.

Definition at line 7112 of file AArch64InstrInfo.cpp.

References assert(), llvm::MachineOperand::CreateReg(), llvm::MDNode::get(), llvm::TargetRegisterInfo::getSubReg(), llvm::MCRegisterInfo::isSubRegister(), llvm::MCRegisterInfo::isSuperOrSubRegisterEq(), llvm::MCRegisterInfo::isSuperRegister(), MI, llvm::None, TII, and TRI.

Referenced by llvm::AArch64InstrInfo::describeLoadedValue().

◆ emitFrameOffsetAdj()

static void emitFrameOffsetAdj ( MachineBasicBlock MBB,
MachineBasicBlock::iterator  MBBI,
const DebugLoc DL,
unsigned  DestReg,
unsigned  SrcReg,
int64_t  Offset,
unsigned  Opc,
const TargetInstrInfo TII,
MachineInstr::MIFlag  Flag,
bool  NeedsWinCFI,
bool *  HasWinCFI 
)
static

◆ findCondCodeUsedByInstr()

static AArch64CC::CondCode findCondCodeUsedByInstr ( const MachineInstr Instr)
static

Find a condition code used by the instruction.

Returns AArch64CC::Invalid if either the instruction does not use condition codes or we don't optimize CmpInstr in the presence of such instructions.

Definition at line 1558 of file AArch64InstrInfo.cpp.

References assert(), llvm::MachineInstr::findRegisterUseOperandIdx(), llvm::MachineOperand::getImm(), llvm::MachineInstr::getOpcode(), llvm::MachineInstr::getOperand(), and llvm::AArch64CC::Invalid.

Referenced by canInstrSubstituteCmpInstr().

◆ forwardCopyWillClobberTuple()

static bool forwardCopyWillClobberTuple ( unsigned  DestReg,
unsigned  SrcReg,
unsigned  NumRegs 
)
static

Definition at line 2838 of file AArch64InstrInfo.cpp.

◆ genFusedMultiply()

static MachineInstr* genFusedMultiply ( MachineFunction MF,
MachineRegisterInfo MRI,
const TargetInstrInfo TII,
MachineInstr Root,
SmallVectorImpl< MachineInstr * > &  InsInstrs,
unsigned  IdxMulOpd,
unsigned  MaddOpc,
const TargetRegisterClass RC,
FMAInstKind  kind = FMAInstKind::Default,
const Register ReplacedAddend = nullptr 
)
static

genFusedMultiply - Generate fused multiply instructions.

This function supports both integer and floating point instructions. A typical example: F|MUL I=A,B,0 F|ADD R,I,C ==> F|MADD R,A,B,C

Parameters
MFContaining MachineFunction
MRIRegister information
TIITarget information
Rootis the F|ADD instruction
[out]InsInstrsis a vector of machine instructions and will contain the generated madd instruction
IdxMulOpdis index of operand in Root that is the result of the F|MUL. In the example above IdxMulOpd is 1.
MaddOpcthe opcode fo the f|madd instruction
RCRegister class of operands
kindof fma instruction (addressing mode) to be generated
ReplacedAddendis the result register from the instruction replacing the non-combined operand, if any.

Definition at line 4675 of file AArch64InstrInfo.cpp.

References Accumulator, llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), llvm::MachineRegisterInfo::constrainRegClass(), Default, llvm::MachineInstr::getDebugLoc(), llvm::getKillRegState(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getUniqueVRegDef(), Indexed, llvm::MachineOperand::isKill(), llvm::Register::isVirtualRegister(), MRI, llvm::ISD::MUL, and TII.

Referenced by llvm::AArch64InstrInfo::genAlternativeCodeSequence(), genFusedMultiplyAcc(), genFusedMultiplyAccNeg(), genFusedMultiplyIdx(), and genFusedMultiplyIdxNeg().

◆ genFusedMultiplyAcc()

static MachineInstr* genFusedMultiplyAcc ( MachineFunction MF,
MachineRegisterInfo MRI,
const TargetInstrInfo TII,
MachineInstr Root,
SmallVectorImpl< MachineInstr * > &  InsInstrs,
unsigned  IdxMulOpd,
unsigned  MaddOpc,
const TargetRegisterClass RC 
)
static

genFusedMultiplyAcc - Helper to generate fused multiply accumulate instructions.

See also
genFusedMultiply

Definition at line 4739 of file AArch64InstrInfo.cpp.

References Accumulator, genFusedMultiply(), MRI, and TII.

Referenced by llvm::AArch64InstrInfo::genAlternativeCodeSequence().

◆ genFusedMultiplyAccNeg()

static MachineInstr* genFusedMultiplyAccNeg ( MachineFunction MF,
MachineRegisterInfo MRI,
const TargetInstrInfo TII,
MachineInstr Root,
SmallVectorImpl< MachineInstr * > &  InsInstrs,
DenseMap< unsigned, unsigned > &  InstrIdxForVirtReg,
unsigned  IdxMulOpd,
unsigned  MaddOpc,
unsigned  MnegOpc,
const TargetRegisterClass RC 
)
static

genFusedMultiplyAccNeg - Helper to generate fused multiply accumulate instructions with an additional negation of the accumulator

Definition at line 4768 of file AArch64InstrInfo.cpp.

References Accumulator, assert(), genFusedMultiply(), genNeg(), MRI, and TII.

Referenced by llvm::AArch64InstrInfo::genAlternativeCodeSequence().

◆ genFusedMultiplyIdx()

static MachineInstr* genFusedMultiplyIdx ( MachineFunction MF,
MachineRegisterInfo MRI,
const TargetInstrInfo TII,
MachineInstr Root,
SmallVectorImpl< MachineInstr * > &  InsInstrs,
unsigned  IdxMulOpd,
unsigned  MaddOpc,
const TargetRegisterClass RC 
)
static

genFusedMultiplyIdx - Helper to generate fused multiply accumulate instructions.

See also
genFusedMultiply

Definition at line 4785 of file AArch64InstrInfo.cpp.

References genFusedMultiply(), Indexed, MRI, and TII.

Referenced by llvm::AArch64InstrInfo::genAlternativeCodeSequence().

◆ genFusedMultiplyIdxNeg()

static MachineInstr* genFusedMultiplyIdxNeg ( MachineFunction MF,
MachineRegisterInfo MRI,
const TargetInstrInfo TII,
MachineInstr Root,
SmallVectorImpl< MachineInstr * > &  InsInstrs,
DenseMap< unsigned, unsigned > &  InstrIdxForVirtReg,
unsigned  IdxMulOpd,
unsigned  MaddOpc,
unsigned  MnegOpc,
const TargetRegisterClass RC 
)
static

genFusedMultiplyAccNeg - Helper to generate fused multiply accumulate instructions with an additional negation of the accumulator

Definition at line 4795 of file AArch64InstrInfo.cpp.

References assert(), genFusedMultiply(), genNeg(), Indexed, MRI, and TII.

Referenced by llvm::AArch64InstrInfo::genAlternativeCodeSequence().

◆ genMaddR()

static MachineInstr* genMaddR ( MachineFunction MF,
MachineRegisterInfo MRI,
const TargetInstrInfo TII,
MachineInstr Root,
SmallVectorImpl< MachineInstr * > &  InsInstrs,
unsigned  IdxMulOpd,
unsigned  MaddOpc,
unsigned  VR,
const TargetRegisterClass RC 
)
static

genMaddR - Generate madd instruction and combine mul and add using an extra virtual register Example - an ADD intermediate needs to be stored in a register: MUL I=A,B,0 ADD R,I,Imm ==> ORR V, ZR, Imm ==> MADD R,A,B,V

Parameters
MFContaining MachineFunction
MRIRegister information
TIITarget information
Rootis the ADD instruction
[out]InsInstrsis a vector of machine instructions and will contain the generated madd instruction
IdxMulOpdis index of operand in Root that is the result of the MUL. In the example above IdxMulOpd is 1.
MaddOpcthe opcode fo the madd instruction
VRis a virtual register that holds the value of an ADD operand (V in the example above).
RCRegister class of operands

Definition at line 4828 of file AArch64InstrInfo.cpp.

References llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), llvm::MachineRegisterInfo::constrainRegClass(), llvm::MachineInstr::getDebugLoc(), llvm::getKillRegState(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::MachineRegisterInfo::getUniqueVRegDef(), llvm::Register::isVirtualRegister(), MRI, llvm::ISD::MUL, and TII.

Referenced by llvm::AArch64InstrInfo::genAlternativeCodeSequence().

◆ genNeg()

static Register genNeg ( MachineFunction MF,
MachineRegisterInfo MRI,
const TargetInstrInfo TII,
MachineInstr Root,
SmallVectorImpl< MachineInstr * > &  InsInstrs,
DenseMap< unsigned, unsigned > &  InstrIdxForVirtReg,
unsigned  MnegOpc,
const TargetRegisterClass RC 
)
static

◆ getBranchDisplacementBits()

static unsigned getBranchDisplacementBits ( unsigned  Opc)
static

◆ getFMAPatterns()

static bool getFMAPatterns ( MachineInstr Root,
SmallVectorImpl< MachineCombinerPattern > &  Patterns 
)
static

◆ getMaddPatterns()

static bool getMaddPatterns ( MachineInstr Root,
SmallVectorImpl< MachineCombinerPattern > &  Patterns 
)
static

◆ getUsedNZCV()

static UsedNZCV getUsedNZCV ( AArch64CC::CondCode  CC)
static

◆ isADDSRegImm()

static bool isADDSRegImm ( unsigned  Opcode)
static

Definition at line 1630 of file AArch64InstrInfo.cpp.

Referenced by canInstrSubstituteCmpInstr().

◆ isCombineInstrCandidate()

static bool isCombineInstrCandidate ( unsigned  Opc)
static

Definition at line 4167 of file AArch64InstrInfo.cpp.

References isCombineInstrCandidate32(), and isCombineInstrCandidate64().

Referenced by getMaddPatterns().

◆ isCombineInstrCandidate32()

static bool isCombineInstrCandidate32 ( unsigned  Opc)
static

Definition at line 4085 of file AArch64InstrInfo.cpp.

Referenced by isCombineInstrCandidate().

◆ isCombineInstrCandidate64()

static bool isCombineInstrCandidate64 ( unsigned  Opc)
static

Definition at line 4104 of file AArch64InstrInfo.cpp.

Referenced by isCombineInstrCandidate().

◆ isCombineInstrCandidateFP()

static bool isCombineInstrCandidateFP ( const MachineInstr Inst)
static

◆ isCombineInstrSettingFlag()

static bool isCombineInstrSettingFlag ( unsigned  Opc)
static

Definition at line 4066 of file AArch64InstrInfo.cpp.

Referenced by getMaddPatterns().

◆ isSUBSRegImm()

static bool isSUBSRegImm ( unsigned  Opcode)
static

Definition at line 1634 of file AArch64InstrInfo.cpp.

Referenced by canInstrSubstituteCmpInstr().

◆ loadRegPairFromStackSlot()

static void loadRegPairFromStackSlot ( const TargetRegisterInfo TRI,
MachineBasicBlock MBB,
MachineBasicBlock::iterator  InsertBefore,
const MCInstrDesc MCID,
Register  DestReg,
unsigned  SubIdx0,
unsigned  SubIdx1,
int  FI,
MachineMemOperand MMO 
)
static

◆ outliningCandidatesSigningKeyConsensus()

static bool outliningCandidatesSigningKeyConsensus ( const outliner::Candidate a,
const outliner::Candidate b 
)
static

Definition at line 6045 of file AArch64InstrInfo.cpp.

References b, and llvm::AArch64FunctionInfo::shouldSignWithBKey().

◆ outliningCandidatesSigningScopeConsensus()

static bool outliningCandidatesSigningScopeConsensus ( const outliner::Candidate a,
const outliner::Candidate b 
)
static

◆ outliningCandidatesV8_3OpsConsensus()

static bool outliningCandidatesV8_3OpsConsensus ( const outliner::Candidate a,
const outliner::Candidate b 
)
static

Definition at line 6053 of file AArch64InstrInfo.cpp.

References b, and llvm::AArch64Subtarget::hasV8_3aOps().

◆ parseCondBranch()

static void parseCondBranch ( MachineInstr LastInst,
MachineBasicBlock *&  Target,
SmallVectorImpl< MachineOperand > &  Cond 
)
static

◆ removeCopies()

static unsigned removeCopies ( const MachineRegisterInfo MRI,
unsigned  VReg 
)
static

◆ scaleOffset()

static bool scaleOffset ( unsigned  Opc,
int64_t &  Offset 
)
static

◆ sForm()

static unsigned sForm ( MachineInstr Instr)
static

Get opcode of S version of Instr.

If Instr is S version its opcode is returned. AArch64::INSTRUCTION_LIST_END is returned if Instr does not have S version or we are not interested in it.

Definition at line 1480 of file AArch64InstrInfo.cpp.

References llvm::MachineInstr::getOpcode().

Referenced by canInstrSubstituteCmpInstr().

◆ shouldClusterFI()

static bool shouldClusterFI ( const MachineFrameInfo MFI,
int  FI1,
int64_t  Offset1,
unsigned  Opcode1,
int  FI2,
int64_t  Offset2,
unsigned  Opcode2 
)
static

◆ signOutlinedFunction()

static void signOutlinedFunction ( MachineFunction MF,
MachineBasicBlock MBB,
bool  ShouldSignReturnAddr,
bool  ShouldSignReturnAddrWithAKey 
)
static

◆ storeRegPairToStackSlot()

static void storeRegPairToStackSlot ( const TargetRegisterInfo TRI,
MachineBasicBlock MBB,
MachineBasicBlock::iterator  InsertBefore,
const MCInstrDesc MCID,
Register  SrcReg,
bool  IsKill,
unsigned  SubIdx0,
unsigned  SubIdx1,
int  FI,
MachineMemOperand MMO 
)
static

◆ UpdateOperandRegClass()

static bool UpdateOperandRegClass ( MachineInstr Instr)
static

Variable Documentation

◆ BCCDisplacementBits

cl::opt<unsigned> BCCDisplacementBits("aarch64-bcc-offset-bits", cl::Hidden, cl::init(19), cl::desc("Restrict range of Bcc instructions (DEBUG)"))
static

◆ CBZDisplacementBits

cl::opt<unsigned> CBZDisplacementBits("aarch64-cbz-offset-bits", cl::Hidden, cl::init(19), cl::desc("Restrict range of CB[N]Z instructions (DEBUG)"))
static

◆ TBZDisplacementBits

cl::opt<unsigned> TBZDisplacementBits("aarch64-tbz-offset-bits", cl::Hidden, cl::init(14), cl::desc("Restrict range of TB[N]Z instructions (DEBUG)"))
static