RISCVInsertVSETVLI.cpp File Reference

#include "RISCV.h"
#include "RISCVSubtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/LiveDebugVariables.h"
#include "llvm/CodeGen/LiveIntervals.h"
#include "llvm/CodeGen/LiveStacks.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include <queue>

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "riscv-insert-vsetvli"
#define	RISCV_INSERT_VSETVLI_NAME   "RISC-V Insert VSETVLI pass"
#define	RISCV_COALESCE_VSETVLI_NAME   "RISC-V Coalesce VSETVLI pass"

Functions
	STATISTIC (NumInsertedVSETVL, "Number of VSETVL inst inserted")
	STATISTIC (NumCoalescedVSETVL, "Number of VSETVL inst coalesced")
INITIALIZE_PASS(RISCVInsertVSETVLI, DEBUG_TYPE, RISCV_INSERT_VSETVLI_NAME, false, false) char RISCVCoalesceVSETVLI	INITIALIZE_PASS (RISCVCoalesceVSETVLI, "riscv-coalesce-vsetvli", RISCV_COALESCE_VSETVLI_NAME, false, false) static VSETVLIInfo getInfoForVSETVLI(const MachineInstr &MI
	if (MI.getOpcode()==RISCV::PseudoVSETIVLI)
	assert ((AVLReg !=RISCV::X0||MI.getOperand(0).getReg() !=RISCV::X0) &&"Can't handle X0, X0 vsetvli yet")
	if (AVLReg==RISCV::X0) NewInfo.setAVLVLMAX()
else NewInfo	setAVLRegDef (MRI.getVRegDef(AVLReg), AVLReg)
NewInfo	setVTYPE (MI.getOperand(2).getImm())
static unsigned	computeVLMAX (unsigned VLEN, unsigned SEW, RISCVII::VLMUL VLMul)
static VSETVLIInfo	computeInfoForInstr (const MachineInstr &MI, uint64_t TSFlags, const RISCVSubtarget &ST, const MachineRegisterInfo *MRI)
static bool	isLMUL1OrSmaller (RISCVII::VLMUL LMUL)
static VSETVLIInfo	adjustIncoming (VSETVLIInfo PrevInfo, VSETVLIInfo NewInfo, DemandedFields &Demanded)
static bool	canMutatePriorConfig (const MachineInstr &PrevMI, const MachineInstr &MI, const DemandedFields &Used, const MachineRegisterInfo &MRI)

Variables
static cl::opt< bool >	DisableInsertVSETVLPHIOpt ("riscv-disable-insert-vsetvl-phi-opt", cl::init(false), cl::Hidden, cl::desc("Disable looking through phis when inserting vsetvlis."))
INITIALIZE_PASS(RISCVInsertVSETVLI, DEBUG_TYPE, RISCV_INSERT_VSETVLI_NAME, false, false) char RISCVCoalesceVSETVLI const MachineRegisterInfo &	MRI
	else
Register	AVLReg = MI.getOperand(1).getReg()
return	NewInfo

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "riscv-insert-vsetvli"

Definition at line 37 of file RISCVInsertVSETVLI.cpp.

RISCV_COALESCE_VSETVLI_NAME

#define RISCV_COALESCE_VSETVLI_NAME   "RISC-V Coalesce VSETVLI pass"

Definition at line 39 of file RISCVInsertVSETVLI.cpp.

RISCV_INSERT_VSETVLI_NAME

#define RISCV_INSERT_VSETVLI_NAME   "RISC-V Insert VSETVLI pass"

Definition at line 38 of file RISCVInsertVSETVLI.cpp.

Function Documentation

adjustIncoming()

static VSETVLIInfo adjustIncoming ( VSETVLIInfo  PrevInfo, VSETVLIInfo  NewInfo, DemandedFields &  Demanded  )

static

Definition at line 1154 of file RISCVInsertVSETVLI.cpp.

References llvm::RISCVVType::getSameRatioLMUL(), Info, and NewInfo.

assert()

assert	(	(AVLReg !=RISCV::X0||MI.getOperand(0).getReg() !=RISCV::X0) &&"Can't handle	X0,
		X0 vsetvli yet"
	)

Referenced by canMutatePriorConfig(), and computeInfoForInstr().

canMutatePriorConfig()

static bool canMutatePriorConfig ( const MachineInstr &  PrevMI, const MachineInstr &  MI, const DemandedFields &  Used, const MachineRegisterInfo &  MRI  )

static

Definition at line 1548 of file RISCVInsertVSETVLI.cpp.

References assert(), llvm::MachineOperand::getImm(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::isImm(), MI, and MRI.

computeInfoForInstr()

static VSETVLIInfo computeInfoForInstr ( const MachineInstr &  MI, uint64_t  TSFlags, const RISCVSubtarget &  ST, const MachineRegisterInfo *  MRI  )

static

Definition at line 906 of file RISCVInsertVSETVLI.cpp.

References assert(), computeVLMAX(), DefMI, llvm::RISCVII::doesForceTailAgnostic(), llvm::MachineOperand::getImm(), llvm::RISCVII::getLMul(), llvm::MachineOperand::getReg(), llvm::RISCVII::hasVecPolicyOp(), llvm::RISCVII::hasVLOp(), llvm::MachineOperand::isImm(), llvm::RISCVVType::isValidSEW(), llvm::RISCVII::MASK_AGNOSTIC, MI, MRI, llvm::RISCVII::TAIL_AGNOSTIC, llvm::RISCVII::usesMaskPolicy(), and llvm::RISCV::VLMaxSentinel.

computeVLMAX()

static unsigned computeVLMAX ( unsigned  VLEN, unsigned  SEW, RISCVII::VLMUL  VLMul  )

static

Definition at line 896 of file RISCVInsertVSETVLI.cpp.

References llvm::RISCVVType::decodeVLMUL().

Referenced by computeInfoForInstr().

if() [1/2]

if

(

AVLReg

= =RISCV::X0

)

if() [2/2]

if

(

MI.

getOpcode() = = RISCV::PseudoVSETIVLI

)

Definition at line 878 of file RISCVInsertVSETVLI.cpp.

References MI, and NewInfo.

INITIALIZE_PASS()

INITIALIZE_PASS(RISCVInsertVSETVLI, DEBUG_TYPE, RISCV_INSERT_VSETVLI_NAME, false, false) char RISCVCoalesceVSETVLI INITIALIZE_PASS	(	RISCVCoalesceVSETVLI	,
		"riscv-coalesce-vsetvli"	,
		RISCV_COALESCE_VSETVLI_NAME	,
		false	,
		false
	)		const &

isLMUL1OrSmaller()

static bool isLMUL1OrSmaller ( RISCVII::VLMUL  LMUL )

static

Definition at line 1082 of file RISCVInsertVSETVLI.cpp.

References llvm::RISCVVType::decodeVLMUL().

setAVLRegDef()

else NewInfo setAVLRegDef	(	MRI.	getVRegDefAVLReg,
		AVLReg
	)

setVTYPE()

NewInfo setVTYPE

(

MI.

getOperand2).getImm(

)

STATISTIC() [1/2]

STATISTIC	(	NumCoalescedVSETVL	,
		"Number of VSETVL inst coalesced"
	)

STATISTIC() [2/2]

STATISTIC	(	NumInsertedVSETVL	,
		"Number of VSETVL inst inserted"
	)

Variable Documentation

AVLReg

Register AVLReg = MI.getOperand(1).getReg()

Definition at line 883 of file RISCVInsertVSETVLI.cpp.

DisableInsertVSETVLPHIOpt

cl::opt< bool > DisableInsertVSETVLPHIOpt("riscv-disable-insert-vsetvl-phi-opt", cl::init(false), cl::Hidden, cl::desc("Disable looking through phis when inserting vsetvlis.")) ( "riscv-disable-insert-vsetvl-phi-opt"  , cl::init(false)  , cl::Hidden  , cl::desc("Disable looking through phis when inserting vsetvlis.")    )

static

else

else

Initial value:

{
    assert(MI.getOpcode() == RISCV::PseudoVSETVLI ||
           MI.getOpcode() == RISCV::PseudoVSETVLIX0)

Definition at line 880 of file RISCVInsertVSETVLI.cpp.

MRI

INITIALIZE_PASS(RISCVInsertVSETVLI, DEBUG_TYPE, RISCV_INSERT_VSETVLI_NAME, false, false) char RISCVCoalesceVSETVLI const MachineRegisterInfo& MRI

Initial value:

{
  VSETVLIInfo NewInfo

Definition at line 876 of file RISCVInsertVSETVLI.cpp.

Referenced by canMutatePriorConfig(), and computeInfoForInstr().

NewInfo

return NewInfo

Definition at line 893 of file RISCVInsertVSETVLI.cpp.

Referenced by adjustIncoming(), llvm::AMDGPU::getMaskedMIMGOp(), and if().