X86MCInstLower.cpp File Reference

#include "MCTargetDesc/X86ATTInstPrinter.h"
#include "MCTargetDesc/X86BaseInfo.h"
#include "MCTargetDesc/X86InstComments.h"
#include "MCTargetDesc/X86ShuffleDecode.h"
#include "MCTargetDesc/X86TargetStreamer.h"
#include "X86AsmPrinter.h"
#include "X86RegisterInfo.h"
#include "X86ShuffleDecodeConstantPool.h"
#include "X86Subtarget.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/StackMaps.h"
#include "llvm/IR/DataLayout.h"
#include "llvm/IR/GlobalValue.h"
#include "llvm/IR/Mangler.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCCodeEmitter.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCFixup.h"
#include "llvm/MC/MCInst.h"
#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCSectionELF.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/MC/MCSymbolELF.h"
#include "llvm/MC/TargetRegistry.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Transforms/Instrumentation/AddressSanitizer.h"
#include "llvm/Transforms/Instrumentation/AddressSanitizerCommon.h"
#include <string>

Include dependency graph for X86MCInstLower.cpp:

Go to the source code of this file.

Classes
struct	NoAutoPaddingScope
	A RAII helper which defines a region of instructions which can't have padding added between them for correctness. More...

Macros
#define	MOV_CASE(Prefix, Suffix)
#define	MOV_AVX512_CASE(Suffix)
#define	CASE_ALL_MOV_RM()

Functions
static void	emitX86Nops (MCStreamer &OS, unsigned NumBytes, const X86Subtarget *Subtarget)
	Emit the optimal amount of multi-byte nops on X86.
static void	SimplifyShortImmForm (MCInst &Inst, unsigned Opcode)
	Simplify FOO $imm, %{al,ax,eax,rax} to FOO $imm, for instruction with a short fixed-register form.
static void	SimplifyMOVSX (MCInst &Inst)
	If a movsx instruction has a shorter encoding for the used register simplify the instruction to use it instead.
static void	SimplifyShortMoveForm (X86AsmPrinter &Printer, MCInst &Inst, unsigned Opcode)
	Simplify things like MOV32rm to MOV32o32a.
static unsigned	getRetOpcode (const X86Subtarget &Subtarget)
static unsigned	convertTailJumpOpcode (unsigned Opcode)
static unsigned	emitNop (MCStreamer &OS, unsigned NumBytes, const X86Subtarget *Subtarget)
	Emit the largest nop instruction smaller than or equal to NumBytes bytes.
static MachineBasicBlock::const_iterator	PrevCrossBBInst (MachineBasicBlock::const_iterator MBBI)
static const Constant *	getConstantFromPool (const MachineInstr &MI, const MachineOperand &Op)
static std::string	getShuffleComment (const MachineInstr *MI, unsigned SrcOp1Idx, unsigned SrcOp2Idx, ArrayRef< int > Mask)
static void	printConstant (const APInt &Val, raw_ostream &CS)
static void	printConstant (const APFloat &Flt, raw_ostream &CS)
static void	printConstant (const Constant *COp, raw_ostream &CS)
static unsigned	getRegisterWidth (const MCOperandInfo &Info)
static void	addConstantComments (const MachineInstr *MI, MCStreamer &OutStreamer)

Macro Definition Documentation

CASE_ALL_MOV_RM

#define CASE_ALL_MOV_RM

(

)

Value:

  MOV_CASE(, )   /* SSE */                                                     \
  MOV_CASE(V, )  /* AVX-128 */                                                 \
  MOV_CASE(V, Y) /* AVX-256 */                                                 \
  MOV_AVX512_CASE(Z)                                                           \
  MOV_AVX512_CASE(Z256)                                                        \
  MOV_AVX512_CASE(Z128)

MOV_AVX512_CASE

#define MOV_AVX512_CASE

(

Suffix

)

Value:

  case X86::VMOVDQA64##Suffix##rm:                                             \
  case X86::VMOVDQA32##Suffix##rm:                                             \
  case X86::VMOVDQU64##Suffix##rm:                                             \
  case X86::VMOVDQU32##Suffix##rm:                                             \
  case X86::VMOVDQU16##Suffix##rm:                                             \
  case X86::VMOVDQU8##Suffix##rm:                                              \
  case X86::VMOVAPS##Suffix##rm:                                               \
  case X86::VMOVAPD##Suffix##rm:                                               \
  case X86::VMOVUPS##Suffix##rm:                                               \
  case X86::VMOVUPD##Suffix##rm:

MOV_CASE

#define MOV_CASE	(		Prefix,
			Suffix
	)

Value:

  case X86::Prefix##MOVAPD##Suffix##rm:                                        \
  case X86::Prefix##MOVAPS##Suffix##rm:                                        \
  case X86::Prefix##MOVUPD##Suffix##rm:                                        \
  case X86::Prefix##MOVUPS##Suffix##rm:                                        \
  case X86::Prefix##MOVDQA##Suffix##rm:                                        \
  case X86::Prefix##MOVDQU##Suffix##rm:

Function Documentation

addConstantComments()

static void addConstantComments ( const MachineInstr *  MI, MCStreamer &  OutStreamer  )

static

Definition at line 2105 of file X86MCInstLower.cpp.

References llvm::MCStreamer::AddComment(), llvm::X86::AddrDisp, llvm::X86::AddrNumOperands, assert(), llvm::CallingConv::C, CASE_ALL_MOV_RM, llvm::DecodePSHUFBMask(), llvm::DecodeVPERMIL2PMask(), llvm::DecodeVPERMILPMask(), llvm::DecodeVPPERMMask(), getConstantFromPool(), llvm::MachineOperand::getImm(), llvm::DstOp::getReg(), llvm::X86ATTInstPrinter::getRegisterName(), getRegisterWidth(), getShuffleComment(), llvm::MachineOperand::isImm(), llvm::X86II::isKMasked(), llvm::X86II::isKMergeMasked(), llvm_unreachable, MI, printConstant(), llvm::raw_string_ostream::str(), and llvm::dwarf::toString().

Referenced by llvm::X86AsmPrinter::emitInstruction().

convertTailJumpOpcode()

static unsigned convertTailJumpOpcode ( unsigned  Opcode )

static

Definition at line 465 of file X86MCInstLower.cpp.

emitNop()

static unsigned emitNop ( MCStreamer &  OS, unsigned  NumBytes, const X86Subtarget *  Subtarget  )

static

Emit the largest nop instruction smaller than or equal to NumBytes bytes.

Return the size of nop emitted.

Definition at line 1109 of file X86MCInstLower.cpp.

References assert(), llvm_unreachable, and OS.

Referenced by emitX86Nops().

emitX86Nops()

static void emitX86Nops ( MCStreamer &  OS, unsigned  NumBytes, const X86Subtarget *  Subtarget  )

static

Emit the optimal amount of multi-byte nops on X86.

Definition at line 1226 of file X86MCInstLower.cpp.

References assert(), emitNop(), and OS.

getConstantFromPool()

static const Constant * getConstantFromPool ( const MachineInstr &  MI, const MachineOperand &  Op  )

static

Definition at line 1882 of file X86MCInstLower.cpp.

References llvm::MachineConstantPoolEntry::ConstVal, llvm::MachineConstantPoolEntry::isMachineConstantPoolEntry(), MI, and llvm::MachineConstantPoolEntry::Val.

Referenced by addConstantComments().

getRegisterWidth()

static unsigned getRegisterWidth ( const MCOperandInfo &  Info )

static

Definition at line 2093 of file X86MCInstLower.cpp.

References Info, and llvm_unreachable.

Referenced by addConstantComments().

getRetOpcode()

static unsigned getRetOpcode ( const X86Subtarget &  Subtarget )

static

Definition at line 426 of file X86MCInstLower.cpp.

Referenced by llvm::X86AsmPrinter::emitInstruction().

getShuffleComment()

static std::string getShuffleComment ( const MachineInstr *  MI, unsigned  SrcOp1Idx, unsigned  SrcOp2Idx, ArrayRef< int >  Mask  )

static

Definition at line 1899 of file X86MCInstLower.cpp.

References assert(), llvm::raw_ostream::flush(), llvm::DstOp::getReg(), llvm::MachineOperand::getReg(), llvm::X86ATTInstPrinter::getRegisterName(), llvm::MachineOperand::isReg(), MI, llvm::SmallVectorBase< Size_T >::size(), llvm::SM_SentinelUndef, and llvm::SM_SentinelZero.

Referenced by addConstantComments().

PrevCrossBBInst()

static MachineBasicBlock::const_iterator PrevCrossBBInst ( MachineBasicBlock::const_iterator  MBBI )

static

Definition at line 1870 of file X86MCInstLower.cpp.

References llvm::MachineBasicBlock::begin(), llvm::MachineBasicBlock::end(), llvm::MachineFunction::front(), llvm::MachineBasicBlock::getParent(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getPrevNode(), MBB, and MBBI.

Referenced by llvm::X86AsmPrinter::emitInstruction().

printConstant() [1/3]

static void printConstant ( const APFloat &  Flt, raw_ostream &  CS  )

static

Definition at line 1999 of file X86MCInstLower.cpp.

References Flt.

printConstant() [2/3]

static void printConstant ( const APInt &  Val, raw_ostream &  CS  )

static

Definition at line 1984 of file X86MCInstLower.cpp.

References llvm::APInt::getBitWidth(), llvm::APInt::getNumWords(), llvm::APInt::getRawData(), llvm::APInt::getZExtValue(), and N.

Referenced by addConstantComments(), and printConstant().

printConstant() [3/3]

static void printConstant ( const Constant *  COp, raw_ostream &  CS  )

static

Definition at line 2006 of file X86MCInstLower.cpp.

References printConstant().

SimplifyMOVSX()

static void SimplifyMOVSX ( MCInst &  Inst )

static

If a movsx instruction has a shorter encoding for the used register simplify the instruction to use it instead.

Definition at line 348 of file X86MCInstLower.cpp.

References llvm::MCInst::getOpcode(), llvm::MCInst::getOperand(), llvm::MCOperand::getReg(), llvm_unreachable, and llvm::MCInst::setOpcode().

SimplifyShortImmForm()

static void SimplifyShortImmForm ( MCInst &  Inst, unsigned  Opcode  )

static

Simplify FOO $imm, %{al,ax,eax,rax} to FOO $imm, for instruction with a short fixed-register form.

Definition at line 325 of file X86MCInstLower.cpp.

References llvm::MCInst::addOperand(), assert(), llvm::MCInst::getNumOperands(), llvm::MCInst::getOperand(), llvm::MCOperand::getReg(), llvm::MCOperand::isExpr(), llvm::MCOperand::isImm(), llvm::MCOperand::isReg(), Saved, and llvm::MCInst::setOpcode().

SimplifyShortMoveForm()

static void SimplifyShortMoveForm ( X86AsmPrinter &  Printer, MCInst &  Inst, unsigned  Opcode  )

static

Simplify things like MOV32rm to MOV32o32a.

Definition at line 375 of file X86MCInstLower.cpp.

References llvm::MCInst::addOperand(), llvm::X86::AddrBaseReg, llvm::X86::AddrIndexReg, llvm::X86::AddrScaleAmt, llvm::X86::AddrSegmentReg, assert(), llvm::MCOperand::getExpr(), llvm::MCOperand::getImm(), llvm::MCInst::getNumOperands(), llvm::MCInst::getOperand(), llvm::MCOperand::getReg(), llvm::MCOperand::isExpr(), llvm::MCOperand::isImm(), llvm::MCOperand::isReg(), Printer, Saved, llvm::MCInst::setOpcode(), and llvm::MCSymbolRefExpr::VK_TLVP.