X86AvoidStoreForwardingBlocks.cpp File Reference

#include "X86.h"
#include "X86InstrInfo.h"
#include "X86Subtarget.h"
#include "llvm/Analysis/AliasAnalysis.h"
#include "llvm/CodeGen/MachineBasicBlock.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineInstr.h"
#include "llvm/CodeGen/MachineInstrBuilder.h"
#include "llvm/CodeGen/MachineOperand.h"
#include "llvm/CodeGen/MachineRegisterInfo.h"
#include "llvm/CodeGen/RegisterClassInfo.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/Function.h"
#include "llvm/InitializePasses.h"
#include "llvm/MC/MCInstrDesc.h"

Go to the source code of this file.

Macros
#define	DEBUG_TYPE   "x86-avoid-sfb"

Functions
	INITIALIZE_PASS_BEGIN (X86AvoidSFBLegacy, DEBUG_TYPE, "Machine code sinking", false, false) INITIALIZE_PASS_END(X86AvoidSFBLegacy
static bool	isXMMLoadOpcode (unsigned Opcode)
static bool	isYMMLoadOpcode (unsigned Opcode)
static bool	isPotentialBlockedMemCpyLd (unsigned Opcode)
static bool	isPotentialBlockedMemCpyPair (unsigned LdOpcode, unsigned StOpcode)
static bool	isPotentialBlockingStoreInst (unsigned Opcode, unsigned LoadOpcode)
static unsigned	getYMMtoXMMLoadOpcode (unsigned LoadOpcode)
static unsigned	getYMMtoXMMStoreOpcode (unsigned StoreOpcode)
static int	getAddrOffset (const MachineInstr *MI)
static MachineOperand &	getBaseOperand (MachineInstr *MI)
static MachineOperand &	getDispOperand (MachineInstr *MI)
static bool	isRelevantAddressingMode (MachineInstr *MI)
static SmallVector< MachineInstr *, 2 >	findPotentialBlockers (MachineInstr *LoadInst, unsigned InspectionLimit)
static void	updateKillStatus (MachineInstr *LoadInst, MachineInstr *StoreInst)
static bool	hasSameBaseOpValue (MachineInstr *LoadInst, MachineInstr *StoreInst)
static bool	isBlockingStore (int64_t LoadDispImm, unsigned LoadSize, int64_t StoreDispImm, unsigned StoreSize)
static void	updateBlockingStoresDispSizeMap (DisplacementSizeMap &BlockingStoresDispSizeMap, int64_t DispImm, unsigned Size)
static void	removeRedundantBlockingStores (DisplacementSizeMap &BlockingStoresDispSizeMap)

Variables
	DEBUG_TYPE
Machine code	sinking
Machine code	false
static const int	MOV128SZ = 16
static const int	MOV64SZ = 8
static const int	MOV32SZ = 4
static const int	MOV16SZ = 2
static const int	MOV8SZ = 1

Macro Definition Documentation

DEBUG_TYPE

#define DEBUG_TYPE   "x86-avoid-sfb"

Definition at line 55 of file X86AvoidStoreForwardingBlocks.cpp.

Function Documentation

findPotentialBlockers()

SmallVector< MachineInstr *, 2 > findPotentialBlockers ( MachineInstr * LoadInst, unsigned InspectionLimit )

static

Definition at line 332 of file X86AvoidStoreForwardingBlocks.cpp.

References E(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), MBB, MI, llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::reverse().

getAddrOffset()

int getAddrOffset ( const MachineInstr * MI )

static

Definition at line 286 of file X86AvoidStoreForwardingBlocks.cpp.

References assert(), llvm::X86II::getMemoryOperandIdx(), and MI.

Referenced by getBaseOperand(), getDispOperand(), and isRelevantAddressingMode().

getBaseOperand()

MachineOperand & getBaseOperand ( MachineInstr * MI )

static

Definition at line 292 of file X86AvoidStoreForwardingBlocks.cpp.

References llvm::X86::AddrBaseReg, getAddrOffset(), and MI.

Referenced by hasSameBaseOpValue(), isRelevantAddressingMode(), and updateKillStatus().

getDispOperand()

MachineOperand & getDispOperand ( MachineInstr * MI )

static

Definition at line 297 of file X86AvoidStoreForwardingBlocks.cpp.

References llvm::X86::AddrDisp, getAddrOffset(), and MI.

Referenced by isRelevantAddressingMode().

getYMMtoXMMLoadOpcode()

unsigned getYMMtoXMMLoadOpcode ( unsigned LoadOpcode )

static

Definition at line 228 of file X86AvoidStoreForwardingBlocks.cpp.

References llvm_unreachable.

getYMMtoXMMStoreOpcode()

unsigned getYMMtoXMMStoreOpcode ( unsigned StoreOpcode )

static

Definition at line 257 of file X86AvoidStoreForwardingBlocks.cpp.

References llvm_unreachable.

hasSameBaseOpValue()

bool hasSameBaseOpValue ( MachineInstr * LoadInst, MachineInstr * StoreInst )

static

Definition at line 593 of file X86AvoidStoreForwardingBlocks.cpp.

References getBaseOperand(), llvm::MachineOperand::getIndex(), llvm::MachineOperand::getReg(), and llvm::MachineOperand::isReg().

INITIALIZE_PASS_BEGIN()

INITIALIZE_PASS_BEGIN	(	X86AvoidSFBLegacy	,
		DEBUG_TYPE	,
		"Machine code sinking"	,
		false	,
		false	)

References DEBUG_TYPE, and INITIALIZE_PASS_DEPENDENCY.

isBlockingStore()

bool isBlockingStore ( int64_t LoadDispImm, unsigned LoadSize, int64_t StoreDispImm, unsigned StoreSize )

static

Definition at line 604 of file X86AvoidStoreForwardingBlocks.cpp.

isPotentialBlockedMemCpyLd()

bool isPotentialBlockedMemCpyLd ( unsigned Opcode )

static

Definition at line 148 of file X86AvoidStoreForwardingBlocks.cpp.

References isXMMLoadOpcode(), and isYMMLoadOpcode().

isPotentialBlockedMemCpyPair()

bool isPotentialBlockedMemCpyPair ( unsigned LdOpcode, unsigned StOpcode )

static

Definition at line 152 of file X86AvoidStoreForwardingBlocks.cpp.

isPotentialBlockingStoreInst()

bool isPotentialBlockingStoreInst ( unsigned Opcode, unsigned LoadOpcode )

static

Definition at line 204 of file X86AvoidStoreForwardingBlocks.cpp.

References isYMMLoadOpcode().

isRelevantAddressingMode()

bool isRelevantAddressingMode ( MachineInstr * MI )

static

Definition at line 305 of file X86AvoidStoreForwardingBlocks.cpp.

References llvm::X86::AddrIndexReg, llvm::X86::AddrScaleAmt, llvm::X86::AddrSegmentReg, llvm::sampleprof::Base, getAddrOffset(), getBaseOperand(), getDispOperand(), llvm::MachineOperand::getImm(), llvm::MachineOperand::getReg(), llvm::MachineOperand::isImm(), llvm::MachineOperand::isReg(), and MI.

isXMMLoadOpcode()

bool isXMMLoadOpcode ( unsigned Opcode )

static

Definition at line 128 of file X86AvoidStoreForwardingBlocks.cpp.

Referenced by isPotentialBlockedMemCpyLd().

isYMMLoadOpcode()

bool isYMMLoadOpcode ( unsigned Opcode )

static

Definition at line 138 of file X86AvoidStoreForwardingBlocks.cpp.

Referenced by isPotentialBlockedMemCpyLd(), and isPotentialBlockingStoreInst().

removeRedundantBlockingStores()

void removeRedundantBlockingStores ( DisplacementSizeMap & BlockingStoresDispSizeMap )

static

Definition at line 622 of file X86AvoidStoreForwardingBlocks.cpp.

References llvm::SmallVectorTemplateCommon< T, typename >::back(), llvm::SmallVectorImpl< T >::clear(), llvm::SmallVectorTemplateBase< T, bool >::pop_back(), llvm::SmallVectorTemplateBase< T, bool >::push_back(), and llvm::SmallVectorTemplateCommon< T, typename >::size().

updateBlockingStoresDispSizeMap()

void updateBlockingStoresDispSizeMap ( DisplacementSizeMap & BlockingStoresDispSizeMap, int64_t DispImm, unsigned Size )

static

Definition at line 612 of file X86AvoidStoreForwardingBlocks.cpp.

References Size.

updateKillStatus()

void updateKillStatus ( MachineInstr * LoadInst, MachineInstr * StoreInst )

static

Definition at line 478 of file X86AvoidStoreForwardingBlocks.cpp.

References getBaseOperand(), llvm::ilist_detail::node_parent_access< NodeTy, ParentTy >::getParent(), llvm::ilist_node_with_parent< NodeTy, ParentTy, Options >::getPrevNode(), llvm::MachineOperand::isKill(), llvm::MachineOperand::isReg(), llvm::prev_nodbg(), and llvm::MachineOperand::setIsKill().

Variable Documentation

DEBUG_TYPE

DEBUG_TYPE

Definition at line 121 of file X86AvoidStoreForwardingBlocks.cpp.

false

Machine code false

Definition at line 122 of file X86AvoidStoreForwardingBlocks.cpp.

MOV128SZ

const int MOV128SZ = 16

static

Definition at line 222 of file X86AvoidStoreForwardingBlocks.cpp.

MOV16SZ

const int MOV16SZ = 2

static

Definition at line 225 of file X86AvoidStoreForwardingBlocks.cpp.

MOV32SZ

const int MOV32SZ = 4

static

Definition at line 224 of file X86AvoidStoreForwardingBlocks.cpp.

MOV64SZ

const int MOV64SZ = 8

static

Definition at line 223 of file X86AvoidStoreForwardingBlocks.cpp.

MOV8SZ

const int MOV8SZ = 1

static

Definition at line 226 of file X86AvoidStoreForwardingBlocks.cpp.

sinking

Machine code sinking

Definition at line 121 of file X86AvoidStoreForwardingBlocks.cpp.