RISCVInsertVSETVLI.cpp File Reference

#include "RISCV.h"
#include "RISCVSubtarget.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/CodeGen/LiveIntervals.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"

Functions
	STATISTIC (NumInsertedVSETVL, "Number of VSETVL inst inserted")
	STATISTIC (NumRemovedVSETVL, "Number of VSETVL inst removed")
	INITIALIZE_PASS (RISCVInsertVSETVLI, DEBUG_TYPE, RISCV_INSERT_VSETVLI_NAME, false, false) static VSETVLIInfo getInfoForVSETVLI(const MachineInstr &MI)
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 void	doUnion (DemandedFields &A, DemandedFields B)
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."))
static cl::opt< bool >	UseStrictAsserts ("riscv-insert-vsetvl-strict-asserts", cl::init(true), cl::Hidden, cl::desc("Enable strict assertion checking for the dataflow algorithm"))

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "riscv-insert-vsetvli"

Definition at line 35 of file RISCVInsertVSETVLI.cpp.

RISCV_INSERT_VSETVLI_NAME

#define RISCV_INSERT_VSETVLI_NAME   "RISC-V Insert VSETVLI pass"

Definition at line 36 of file RISCVInsertVSETVLI.cpp.

Function Documentation

adjustIncoming()

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

static

Definition at line 1073 of file RISCVInsertVSETVLI.cpp.

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

canMutatePriorConfig()

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

static

Definition at line 1492 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 821 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 811 of file RISCVInsertVSETVLI.cpp.

References llvm::RISCVVType::decodeVLMUL().

Referenced by computeInfoForInstr().

doUnion()

static void doUnion ( DemandedFields &  A, DemandedFields  B  )

static

Definition at line 1480 of file RISCVInsertVSETVLI.cpp.

References A, and B.

INITIALIZE_PASS()

INITIALIZE_PASS	(	RISCVInsertVSETVLI	,
		DEBUG_TYPE	,
		RISCV_INSERT_VSETVLI_NAME	,
		false	,
		false
	)		const &

Definition at line 789 of file RISCVInsertVSETVLI.cpp.

References assert(), and MI.

isLMUL1OrSmaller()

static bool isLMUL1OrSmaller ( RISCVII::VLMUL  LMUL )

static

Definition at line 999 of file RISCVInsertVSETVLI.cpp.

References llvm::RISCVVType::decodeVLMUL().

STATISTIC() [1/2]

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

STATISTIC() [2/2]

STATISTIC	(	NumRemovedVSETVL	,
		"Number of VSETVL inst removed"
	)

Variable Documentation

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

UseStrictAsserts

cl::opt< bool > UseStrictAsserts("riscv-insert-vsetvl-strict-asserts", cl::init(true), cl::Hidden, cl::desc("Enable strict assertion checking for the dataflow algorithm")) ( "riscv-insert-vsetvl-strict-asserts"  , cl::init(true)  , cl::Hidden  , cl::desc("Enable strict assertion checking for the dataflow algorithm")    )

static