RISCVSExtWRemoval.cpp File Reference

#include "RISCV.h"
#include "RISCVMachineFunctionInfo.h"
#include "RISCVSubtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/TargetInstrInfo.h"

Include dependency graph for RISCVSExtWRemoval.cpp:

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "riscv-sextw-removal"

Functions
	STATISTIC (NumRemovedSExtW, "Number of removed sign-extensions")
	STATISTIC (NumTransformedToWInstrs, "Number of instructions transformed to W-ops")
	INITIALIZE_PASS (RISCVSExtWRemoval, DEBUG_TYPE, "RISCV sext.w Removal", false, false) FunctionPass *llvm
static bool	isSignExtendingOpW (const MachineInstr &MI, const MachineRegisterInfo &MRI)
static bool	isSignExtendedW (Register SrcReg, const MachineRegisterInfo &MRI, const RISCVInstrInfo &TII, SmallPtrSetImpl< MachineInstr * > &FixableDef)
static unsigned	getWOp (unsigned Opcode)

Variables
static cl::opt< bool >	DisableSExtWRemoval ("riscv-disable-sextw-removal", cl::desc("Disable removal of sext.w"), cl::init(false), cl::Hidden)

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "riscv-sextw-removal"

Definition at line 24 of file RISCVSExtWRemoval.cpp.

Function Documentation

getWOp()

static unsigned getWOp ( unsigned  Opcode )

static

Definition at line 299 of file RISCVSExtWRemoval.cpp.

References llvm_unreachable.

INITIALIZE_PASS()

INITIALIZE_PASS	(	RISCVSExtWRemoval	,
		DEBUG_TYPE	,
		"RISCV sext.w Removal"	,
		false	,
		false
	)

Definition at line 56 of file RISCVSExtWRemoval.cpp.

isSignExtendedW()

static bool isSignExtendedW ( Register  SrcReg, const MachineRegisterInfo &  MRI, const RISCVInstrInfo &  TII, SmallPtrSetImpl< MachineInstr * > &  FixableDef  )

static

Definition at line 97 of file RISCVSExtWRemoval.cpp.

References B, llvm::BitWidth, D, E, llvm::SmallVectorBase< Size_T >::empty(), llvm::MachineFunction::front(), llvm::MachineOperand::getGlobal(), llvm::MachineFunction::getInfo(), getOpcode(), llvm::MachineInstr::getOperand(), llvm::MachineFunction::getRegInfo(), I, llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::MachineBasicBlock::instr_begin(), llvm::MachineInstr::isCall(), llvm::MachineOperand::isGlobal(), llvm::MachineRegisterInfo::isLiveIn(), llvm::RISCVMachineFunctionInfo::isSExt32Register(), isSignExtendingOpW(), llvm::Register::isVirtual(), MBB, MI, MRI, llvm::SmallVectorImpl< T >::pop_back_val(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and TII.

isSignExtendingOpW()

static bool isSignExtendingOpW ( const MachineInstr &  MI, const MachineRegisterInfo &  MRI  )

static

Definition at line 65 of file RISCVSExtWRemoval.cpp.

References llvm::RISCVII::IsSignExtendingOpWMask, MI, and TSFlags.

Referenced by isSignExtendedW().

STATISTIC() [1/2]

STATISTIC	(	NumRemovedSExtW	,
		"Number of removed sign-extensions"
	)

STATISTIC() [2/2]

STATISTIC	(	NumTransformedToWInstrs	,
		"Number of instructions transformed to W-ops"
	)

Variable Documentation

DisableSExtWRemoval

cl::opt< bool > DisableSExtWRemoval("riscv-disable-sextw-removal", cl::desc("Disable removal of sext.w"), cl::init(false), cl::Hidden) ( "riscv-disable-sextw-removal"  , cl::desc("Disable removal of sext.w")  , cl::init(false)  , cl::Hidden    )

static