X86MCInstLower.cpp File Reference

#include "X86AsmPrinter.h"
#include "X86RegisterInfo.h"
#include "InstPrinter/X86ATTInstPrinter.h"
#include "MCTargetDesc/X86BaseInfo.h"
#include "Utils/X86ShuffleDecode.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineModuleInfoImpls.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/MCInst.h"
#include "llvm/MC/MCInstBuilder.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
#include "llvm/Support/TargetRegistry.h"

Include dependency graph for X86MCInstLower.cpp:

Go to the source code of this file.

Namespaces
namespace	llvm
	List of target independent CodeGen pass IDs.
Functions
static void	EmitNops (MCStreamer &OS, unsigned NumBytes, bool Is64Bit, const MCSubtargetInfo &STI)
	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 MachineBasicBlock::const_iterator	PrevCrossBBInst (MachineBasicBlock::const_iterator MBBI)

---

Function Documentation

static void EmitNops	(	MCStreamer &	OS,
		unsigned	NumBytes,
		bool	Is64Bit,
		const MCSubtargetInfo &	STI
	)		[static]

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

Definition at line 760 of file X86MCInstLower.cpp.

References llvm::MCStreamer::EmitBytes(), llvm::MCStreamer::EmitInstruction(), and llvm_unreachable.

static unsigned getRetOpcode

(

const X86Subtarget &

Subtarget

)

[static]

Definition at line 392 of file X86MCInstLower.cpp.

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

static MachineBasicBlock::const_iterator PrevCrossBBInst

(

MachineBasicBlock::const_iterator

MBBI

)

[static]

Definition at line 856 of file X86MCInstLower.cpp.

References llvm::MachineBasicBlock::begin(), llvm::MachineFunction::begin(), llvm::MachineBasicBlock::end(), llvm::MachineBasicBlock::getParent(), and llvm::ilist_node< NodeTy >::getPrevNode().

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

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 314 of file X86MCInstLower.cpp.

References llvm::AArch64CC::AL, llvm::N86::EAX, llvm::MCInst::getOpcode(), llvm::MCInst::getOperand(), llvm::MCOperand::getReg(), llvm_unreachable, and llvm::MCInst::setOpcode().

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 292 of file X86MCInstLower.cpp.

References llvm::MCInst::addOperand(), llvm::AArch64CC::AL, llvm::N86::EAX, llvm::MCInst::getNumOperands(), llvm::MCInst::getOperand(), llvm::MCOperand::getReg(), llvm::MCOperand::isExpr(), llvm::MCOperand::isImm(), llvm::MCOperand::isReg(), and llvm::MCInst::setOpcode().

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

Simplify things like MOV32rm to MOV32o32a.

Definition at line 341 of file X86MCInstLower.cpp.

References llvm::HexagonII::Absolute, llvm::MCInst::addOperand(), llvm::X86::AddrBaseReg, llvm::X86::AddrIndexReg, llvm::X86::AddrScaleAmt, llvm::X86::AddrSegmentReg, llvm::AArch64CC::AL, llvm::N86::EAX, llvm::MCOperand::getExpr(), llvm::MCOperand::getImm(), llvm::MCInst::getNumOperands(), llvm::MCInst::getOperand(), llvm::MCOperand::getReg(), llvm::X86AsmPrinter::getSubtarget(), llvm::MCOperand::isExpr(), llvm::MCOperand::isImm(), llvm::MCOperand::isReg(), and llvm::MCInst::setOpcode().