LLVM: lib/Target/X86/X86CompressEVEX.cpp File Reference

LLVM 24.0.0git

#include "MCTargetDesc/X86BaseInfo.h"
#include "X86.h"
#include "X86InstrInfo.h"
#include "X86Subtarget.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionAnalysisManager.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachinePassManager.h"
#include "llvm/IR/Analysis.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/Pass.h"
#include <atomic>
#include <cassert>
#include <cstdint>
#include "X86GenInstrMapping.inc"

Go to the source code of this file.

Macros
#define	COMP_EVEX_DESC "Compressing EVEX instrs when possible"
#define	COMP_EVEX_NAME "x86-compress-evex"
#define	DEBUG_TYPE COMP_EVEX_NAME
#define	GET_X86_COMPRESS_EVEX_TABLE

Functions
static bool	usesExtendedRegister (const MachineInstr &MI)
static bool	performCustomAdjustments (MachineInstr &MI, unsigned NewOpc)
static unsigned	getMovMskBits (unsigned Opc)
static bool	isKMovNarrowing (unsigned MaskBits, unsigned KMOVOpc)
static bool	isZeroVector (const MachineInstr &MI)
static bool	isAllOnesVector (const MachineInstr &MI, bool Is256Bit)
static MachineInstr *	getSignMaskConstantDef (MachineInstr &MI, Register Reg, bool IsZero, bool Is256Bit, const TargetRegisterInfo *TRI)
static bool	isCompressibleBlendVUse (unsigned BlendOpc, unsigned UseOpc)
static bool	tryCompressMaskProducer (MachineInstr &MI, MachineBasicBlock &MBB, const X86Subtarget &ST, SmallVectorImpl< MachineInstr * > &ToErase)
static bool	CompressEVEXImpl (MachineInstr &MI, MachineBasicBlock &MBB, const X86Subtarget &ST, SmallVectorImpl< MachineInstr * > &ToErase)
static bool	runOnMF (MachineFunction &MF)
	INITIALIZE_PASS (CompressEVEXLegacy, COMP_EVEX_NAME, COMP_EVEX_DESC, false, false) FunctionPass *llvm

Variables
cl::opt< bool >	X86EnableAPXForRelocation

Macro Definition Documentation

◆ COMP_EVEX_DESC

#define COMP_EVEX_DESC "Compressing EVEX instrs when possible"

Definition at line 63 of file X86CompressEVEX.cpp.

Referenced by INITIALIZE_PASS().

◆ COMP_EVEX_NAME

#define COMP_EVEX_NAME "x86-compress-evex"

Definition at line 64 of file X86CompressEVEX.cpp.

Referenced by INITIALIZE_PASS().

◆ DEBUG_TYPE

#define DEBUG_TYPE COMP_EVEX_NAME

Definition at line 66 of file X86CompressEVEX.cpp.

◆ GET_X86_COMPRESS_EVEX_TABLE

#define GET_X86_COMPRESS_EVEX_TABLE

Definition at line 72 of file X86CompressEVEX.cpp.

Function Documentation

◆ CompressEVEXImpl()

bool CompressEVEXImpl	(	MachineInstr &	MI,
		MachineBasicBlock &	MBB,
		const X86Subtarget &	ST,
		SmallVectorImpl< MachineInstr * > &	ToErase )

static

Definition at line 530 of file X86CompressEVEX.cpp.

References llvm::X86::AC_EVEX_2_EVEX, llvm::X86::AC_EVEX_2_LEGACY, llvm::X86::AC_EVEX_2_VEX, llvm::MachineInstrBuilder::add(), llvm::MachineInstrBuilder::addImm(), llvm::MachineInstrBuilder::addReg(), llvm::ArrayRef(), assert(), llvm::BuildMI(), contains(), llvm::X86II::EncodingMask, llvm::X86II::EVEX, llvm::X86II::EVEX_B, llvm::X86II::EVEX_K, llvm::X86II::EVEX_L2, llvm::X86II::EVEX_NF, llvm::X86::getFirstAddrOperandIdx(), llvm::X86::getNFVariant(), llvm::X86::getNonNDVariant(), llvm::MachineOperand::getReg(), llvm::getX86SubSuperRegister(), llvm::X86II::hasNewDataDest(), I, llvm::isAddMemInstrWithRelocation(), llvm::MachineOperand::isReg(), llvm::X86II::LEGACY, llvm_unreachable, llvm::lower_bound(), MBB, MI, Opc, performCustomAdjustments(), llvm::Table, tryCompressMaskProducer(), llvm::MCInstrDesc::TSFlags, uint64_t, usesExtendedRegister(), llvm::X86II::VEX, and X86EnableAPXForRelocation.

Referenced by runOnMF().

◆ getMovMskBits()

unsigned getMovMskBits ( unsigned Opc )

static

Definition at line 184 of file X86CompressEVEX.cpp.

References llvm_unreachable, and Opc.

Referenced by tryCompressMaskProducer().

◆ getSignMaskConstantDef()

MachineInstr * getSignMaskConstantDef	(	MachineInstr &	MI,
		Register	Reg,
		bool	IsZero,
		bool	Is256Bit,
		const TargetRegisterInfo *	TRI )

static

Definition at line 250 of file X86CompressEVEX.cpp.

References DefMI, isAllOnesVector(), isZeroVector(), llvm::make_range(), MI, Reg, llvm::reverse(), and TRI.

Referenced by tryCompressMaskProducer().

◆ INITIALIZE_PASS()

INITIALIZE_PASS	(	CompressEVEXLegacy	,
		COMP_EVEX_NAME	,
		COMP_EVEX_DESC	,
		false	,
		false	)

Definition at line 725 of file X86CompressEVEX.cpp.

References COMP_EVEX_DESC, COMP_EVEX_NAME, and llvm::createX86CompressEVEXLegacyPass().

◆ isAllOnesVector()

bool isAllOnesVector	(	const MachineInstr &	MI,
		bool	Is256Bit )

static

Definition at line 239 of file X86CompressEVEX.cpp.

References MI.

Referenced by getSignMaskConstantDef().

◆ isCompressibleBlendVUse()

bool isCompressibleBlendVUse	(	unsigned	BlendOpc,
		unsigned	UseOpc )

static

Definition at line 266 of file X86CompressEVEX.cpp.

Referenced by tryCompressMaskProducer().

◆ isKMovNarrowing()

bool isKMovNarrowing	(	unsigned	MaskBits,
		unsigned	KMOVOpc )

static

Definition at line 208 of file X86CompressEVEX.cpp.

References llvm_unreachable.

Referenced by tryCompressMaskProducer().

◆ isZeroVector()

bool isZeroVector ( const MachineInstr & MI )

static

Definition at line 227 of file X86CompressEVEX.cpp.

References MI.

Referenced by getSignMaskConstantDef().

◆ performCustomAdjustments()

bool performCustomAdjustments	(	MachineInstr &	MI,
		unsigned	NewOpc )

static

Definition at line 124 of file X86CompressEVEX.cpp.

References assert(), Imm, MI, and Opc.

Referenced by CompressEVEXImpl().

◆ runOnMF()

bool runOnMF ( MachineFunction & MF )

static

Definition at line 693 of file X86CompressEVEX.cpp.

References assert(), Changed, CompressEVEXImpl(), llvm::dbgs(), llvm::MachineFunction::getSubtarget(), llvm::is_sorted(), LLVM_DEBUG, llvm::make_early_inc_range(), MBB, and MI.

Referenced by llvm::X86CompressEVEXPass::run().

◆ tryCompressMaskProducer()

bool tryCompressMaskProducer	(	MachineInstr &	MI,
		MachineBasicBlock &	MBB,
		const X86Subtarget &	ST,
		SmallVectorImpl< MachineInstr * > &	ToErase )

static

Definition at line 328 of file X86CompressEVEX.cpp.

References llvm::X86::AC_EVEX_2_VEX, llvm::MachineInstrBuilder::addReg(), assert(), llvm::BuildMI(), llvm::MachineInstr::getDebugLoc(), llvm::APInt::getLowBitsSet(), getMovMskBits(), llvm::MachineInstr::getOperand(), llvm::MachineOperand::getReg(), llvm::getRegState(), llvm::APInt::getSExtValue(), getSignMaskConstantDef(), isCompressibleBlendVUse(), llvm::MachineOperand::isDead(), llvm::isInt(), isKMovNarrowing(), llvm::MachineOperand::isRenamable(), llvm::Kill, llvm_unreachable, llvm::MachineBasicBlock::LQR_Dead, llvm::make_range(), MBB, MI, llvm::MachineInstr::modifiesRegister(), Opc, llvm::SmallVectorTemplateBase< T, bool >::push_back(), llvm::MachineInstr::setAsmPrinterFlag(), llvm::MachineInstr::setDesc(), llvm::MachineOperand::setIsKill(), llvm::MachineOperand::setIsRenamable(), llvm::MachineOperand::setReg(), TII, TRI, llvm::MachineRegisterInfo::use_instructions(), UseMI, and usesExtendedRegister().

Referenced by CompressEVEXImpl().

◆ usesExtendedRegister()

bool usesExtendedRegister ( const MachineInstr & MI )

static

Definition at line 93 of file X86CompressEVEX.cpp.

References assert(), llvm::X86II::isApxExtendedReg(), llvm::X86II::isZMMReg(), MI, and Reg.

Referenced by CompressEVEXImpl(), and tryCompressMaskProducer().

Variable Documentation

◆ X86EnableAPXForRelocation

cl::opt<bool> X86EnableAPXForRelocation

extern

Referenced by CompressEVEXImpl(), llvm::X86InstrInfo::foldMemoryOperandImpl(), llvm::X86RegisterInfo::getLargestLegalSuperClass(), llvm::X86::getNFVariantIfClobberRemovable(), and suppressAPXForRelocation().