RISCVSExtWRemoval.cpp File Reference

#include "RISCV.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 void	addUses (const MachineInstr &MI, SmallVectorImpl< const MachineInstr * > &Worklist, MachineRegisterInfo &MRI)
static bool	isAllUsesReadW (const MachineInstr &OrigMI, MachineRegisterInfo &MRI)
static bool	isSignExtendingOpW (MachineInstr &MI, MachineRegisterInfo &MRI, SmallPtrSetImpl< MachineInstr * > &FixableDef)
static bool	isSignExtendedW (MachineInstr &OrigMI, MachineRegisterInfo &MRI, 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 21 of file RISCVSExtWRemoval.cpp.

Function Documentation

addUses()

static void addUses ( const MachineInstr &  MI, SmallVectorImpl< const MachineInstr * > &  Worklist, MachineRegisterInfo &  MRI  )

static

Definition at line 61 of file RISCVSExtWRemoval.cpp.

References MI, MRI, and llvm::MachineRegisterInfo::reg_operands().

Referenced by isAllUsesReadW().

getWOp()

static unsigned getWOp ( unsigned  Opcode )

static

Definition at line 407 of file RISCVSExtWRemoval.cpp.

References llvm::ISD::ADD, llvm::ARM_MB::LD, llvm_unreachable, llvm::ISD::MUL, and llvm::ISD::SUB.

INITIALIZE_PASS()

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

Definition at line 53 of file RISCVSExtWRemoval.cpp.

isAllUsesReadW()

static bool isAllUsesReadW ( const MachineInstr &  OrigMI, MachineRegisterInfo &  MRI  )

static

Definition at line 75 of file RISCVSExtWRemoval.cpp.

References llvm::ISD::ADD, addUses(), llvm::ISD::AND, llvm::RISCVISD::CLZW, llvm::RISCVISD::CTZW, llvm::RISCVISD::DIVUW, llvm::RISCVISD::DIVW, llvm::SmallPtrSetImpl< PtrType >::insert(), llvm::ARM_MB::LD, MI, MRI, llvm::ISD::MUL, llvm::ISD::OR, llvm::SmallVectorImpl< T >::pop_back_val(), llvm::RISCVISD::REMUW, llvm::RISCVISD::ROLW, llvm::RISCVISD::RORW, llvm::RISCVISD::SLLW, llvm::RISCVISD::SRAW, llvm::RISCVISD::SRLW, llvm::ISD::SUB, and llvm::ISD::XOR.

Referenced by isSignExtendingOpW().

isSignExtendedW()

static bool isSignExtendedW ( MachineInstr &  OrigMI, MachineRegisterInfo &  MRI, SmallPtrSetImpl< MachineInstr * > &  FixableDef  )

static

Definition at line 293 of file RISCVSExtWRemoval.cpp.

References llvm::ISD::AND, D, E, llvm::MachineRegisterInfo::getVRegDef(), I, llvm::SmallPtrSetImpl< PtrType >::insert(), isSignExtendingOpW(), llvm::Register::isVirtual(), LLVM_FALLTHROUGH, MI, MRI, llvm::ISD::OR, llvm::SmallVectorImpl< T >::pop_back_val(), and llvm::ISD::XOR.

isSignExtendingOpW()

static bool isSignExtendingOpW ( MachineInstr &  MI, MachineRegisterInfo &  MRI, SmallPtrSetImpl< MachineInstr * > &  FixableDef  )

static

Definition at line 195 of file RISCVSExtWRemoval.cpp.

References llvm::ISD::ADD, CLZ, llvm::RISCVISD::CLZW, llvm::RISCVISD::CTZW, llvm::RISCVISD::DIVUW, llvm::RISCVISD::DIVW, llvm::SmallPtrSetImpl< PtrType >::insert(), isAllUsesReadW(), llvm::ARM_MB::LD, LLVM_FALLTHROUGH, MI, MRI, llvm::ISD::MUL, llvm::RISCVISD::REMUW, llvm::RISCVISD::ROLW, llvm::RISCVISD::RORW, llvm::RISCVISD::SLLW, llvm::RISCVISD::SRAW, llvm::RISCVISD::SRLW, and llvm::ISD::SUB.

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)

static