108#define DEBUG_TYPE "instcombine"
116 "Number of instruction combining iterations performed");
117STATISTIC(NumOneIteration,
"Number of functions with one iteration");
118STATISTIC(NumTwoIterations,
"Number of functions with two iterations");
119STATISTIC(NumThreeIterations,
"Number of functions with three iterations");
121 "Number of functions with four or more iterations");
125STATISTIC(NumDeadInst ,
"Number of dead inst eliminated");
131 "Controls which instructions are visited");
138 "instcombine-max-sink-users",
cl::init(32),
139 cl::desc(
"Maximum number of undroppable users for instruction sinking"));
143 cl::desc(
"Maximum array size considered when doing a combine"));
155std::optional<Instruction *>
166 bool &KnownBitsComputed) {
183 *
this, II, DemandedElts, PoisonElts, PoisonElts2, PoisonElts3,
198 auto *Inst = dyn_cast<Instruction>(
GEP);
205 if (Inst && !
GEP->hasOneUse() && !
GEP->hasAllConstantIndices() &&
206 !
GEP->getSourceElementType()->isIntegerTy(8)) {
220bool InstCombinerImpl::isDesirableIntType(
unsigned BitWidth)
const {
239bool InstCombinerImpl::shouldChangeType(
unsigned FromWidth,
240 unsigned ToWidth)
const {
246 if (ToWidth < FromWidth && isDesirableIntType(ToWidth))
251 if ((FromLegal || isDesirableIntType(FromWidth)) && !ToLegal)
256 if (!FromLegal && !ToLegal && ToWidth > FromWidth)
267bool InstCombinerImpl::shouldChangeType(
Type *
From,
Type *To)
const {
273 unsigned FromWidth =
From->getPrimitiveSizeInBits();
275 return shouldChangeType(FromWidth, ToWidth);
284 auto *OBO = dyn_cast<OverflowingBinaryOperator>(&
I);
285 if (!OBO || !OBO->hasNoSignedWrap())
290 if (Opcode != Instruction::Add && Opcode != Instruction::Sub)
293 const APInt *BVal, *CVal;
297 bool Overflow =
false;
298 if (Opcode == Instruction::Add)
299 (void)BVal->
sadd_ov(*CVal, Overflow);
301 (
void)BVal->
ssub_ov(*CVal, Overflow);
307 auto *OBO = dyn_cast<OverflowingBinaryOperator>(&
I);
308 return OBO && OBO->hasNoUnsignedWrap();
312 auto *OBO = dyn_cast<OverflowingBinaryOperator>(&
I);
313 return OBO && OBO->hasNoSignedWrap();
322 I.clearSubclassOptionalData();
327 I.clearSubclassOptionalData();
328 I.setFastMathFlags(FMF);
337 auto *Cast = dyn_cast<CastInst>(BinOp1->
getOperand(0));
338 if (!Cast || !Cast->hasOneUse())
342 auto CastOpcode = Cast->getOpcode();
343 if (CastOpcode != Instruction::ZExt)
351 auto *BinOp2 = dyn_cast<BinaryOperator>(Cast->getOperand(0));
352 if (!BinOp2 || !BinOp2->hasOneUse() || BinOp2->getOpcode() != AssocOpcode)
378 Cast->dropPoisonGeneratingFlags();
384Value *InstCombinerImpl::simplifyIntToPtrRoundTripCast(
Value *Val) {
385 auto *IntToPtr = dyn_cast<IntToPtrInst>(Val);
388 auto *PtrToInt = dyn_cast<PtrToIntInst>(IntToPtr->getOperand(0));
389 Type *CastTy = IntToPtr->getDestTy();
392 PtrToInt->getSrcTy()->getPointerAddressSpace() &&
395 return PtrToInt->getOperand(0);
422 bool Changed =
false;
430 Changed = !
I.swapOperands();
432 if (
I.isCommutative()) {
433 if (
auto Pair = matchSymmetricPair(
I.getOperand(0),
I.getOperand(1))) {
443 if (
I.isAssociative()) {
466 I.setHasNoUnsignedWrap(
true);
469 I.setHasNoSignedWrap(
true);
498 if (
I.isAssociative() &&
I.isCommutative()) {
561 if (isa<FPMathOperator>(NewBO)) {
575 I.setHasNoUnsignedWrap(
true);
593 if (LOp == Instruction::And)
594 return ROp == Instruction::Or || ROp == Instruction::Xor;
597 if (LOp == Instruction::Or)
598 return ROp == Instruction::And;
602 if (LOp == Instruction::Mul)
603 return ROp == Instruction::Add || ROp == Instruction::Sub;
626 if (isa<Constant>(V))
640 assert(
Op &&
"Expected a binary operator");
641 LHS =
Op->getOperand(0);
642 RHS =
Op->getOperand(1);
643 if (TopOpcode == Instruction::Add || TopOpcode == Instruction::Sub) {
648 return Instruction::Mul;
653 if (OtherOp && OtherOp->
getOpcode() == Instruction::AShr &&
656 return Instruction::AShr;
659 return Op->getOpcode();
668 assert(
A &&
B &&
C &&
D &&
"All values must be provided");
671 Value *RetVal =
nullptr;
682 if (
A ==
C || (InnerCommutative &&
A ==
D)) {
702 if (
B ==
D || (InnerCommutative &&
B ==
C)) {
725 if (isa<OverflowingBinaryOperator>(RetVal)) {
728 if (isa<OverflowingBinaryOperator>(&
I)) {
729 HasNSW =
I.hasNoSignedWrap();
730 HasNUW =
I.hasNoUnsignedWrap();
732 if (
auto *LOBO = dyn_cast<OverflowingBinaryOperator>(
LHS)) {
733 HasNSW &= LOBO->hasNoSignedWrap();
734 HasNUW &= LOBO->hasNoUnsignedWrap();
737 if (
auto *ROBO = dyn_cast<OverflowingBinaryOperator>(
RHS)) {
738 HasNSW &= ROBO->hasNoSignedWrap();
739 HasNUW &= ROBO->hasNoUnsignedWrap();
742 if (TopLevelOpcode == Instruction::Add && InnerOpcode == Instruction::Mul) {
752 cast<Instruction>(RetVal)->setHasNoSignedWrap(HasNSW);
755 cast<Instruction>(RetVal)->setHasNoUnsignedWrap(HasNUW);
770 unsigned Opc =
I->getOpcode();
771 unsigned ConstIdx = 1;
778 case Instruction::Sub:
781 case Instruction::ICmp:
788 case Instruction::Or:
792 case Instruction::Add:
798 if (!
match(
I->getOperand(1 - ConstIdx),
811 if (Opc == Instruction::ICmp && !cast<ICmpInst>(
I)->isEquality() &&
816 bool Consumes =
false;
820 assert(NotOp !=
nullptr &&
821 "Desync between isFreeToInvert and getFreelyInverted");
830 case Instruction::Sub:
833 case Instruction::Or:
834 case Instruction::Add:
837 case Instruction::ICmp:
873 auto IsValidBinOpc = [](
unsigned Opc) {
877 case Instruction::And:
878 case Instruction::Or:
879 case Instruction::Xor:
880 case Instruction::Add:
889 auto IsCompletelyDistributable = [](
unsigned BinOpc1,
unsigned BinOpc2,
891 assert(ShOpc != Instruction::AShr);
892 return (BinOpc1 != Instruction::Add && BinOpc2 != Instruction::Add) ||
893 ShOpc == Instruction::Shl;
896 auto GetInvShift = [](
unsigned ShOpc) {
897 assert(ShOpc != Instruction::AShr);
898 return ShOpc == Instruction::LShr ? Instruction::Shl : Instruction::LShr;
901 auto CanDistributeBinops = [&](
unsigned BinOpc1,
unsigned BinOpc2,
905 if (BinOpc1 == Instruction::And)
910 if (!IsCompletelyDistributable(BinOpc1, BinOpc2, ShOpc))
916 if (BinOpc2 == Instruction::And)
927 auto MatchBinOp = [&](
unsigned ShOpnum) ->
Instruction * {
929 Value *
X, *
Y, *ShiftedX, *Mask, *Shift;
930 if (!
match(
I.getOperand(ShOpnum),
933 if (!
match(
I.getOperand(1 - ShOpnum),
941 auto *IY = dyn_cast<Instruction>(
I.getOperand(ShOpnum));
942 auto *IX = dyn_cast<Instruction>(ShiftedX);
947 unsigned ShOpc = IY->getOpcode();
948 if (ShOpc != IX->getOpcode())
952 auto *BO2 = dyn_cast<Instruction>(
I.getOperand(1 - ShOpnum));
956 unsigned BinOpc = BO2->getOpcode();
958 if (!IsValidBinOpc(
I.getOpcode()) || !IsValidBinOpc(BinOpc))
961 if (ShOpc == Instruction::AShr) {
975 if (BinOpc ==
I.getOpcode() &&
976 IsCompletelyDistributable(
I.getOpcode(), BinOpc, ShOpc)) {
991 if (!CanDistributeBinops(
I.getOpcode(), BinOpc, ShOpc, CMask, CShift))
1005 return MatchBinOp(1);
1023 Value *
A, *CondVal, *TrueVal, *FalseVal;
1026 auto MatchSelectAndCast = [&](
Value *CastOp,
Value *SelectOp) {
1028 A->getType()->getScalarSizeInBits() == 1 &&
1035 if (MatchSelectAndCast(
LHS,
RHS))
1037 else if (MatchSelectAndCast(
RHS,
LHS))
1042 auto NewFoldedConst = [&](
bool IsTrueArm,
Value *V) {
1043 bool IsCastOpRHS = (CastOp ==
RHS);
1044 bool IsZExt = isa<ZExtInst>(CastOp);
1049 }
else if (IsZExt) {
1050 unsigned BitWidth = V->getType()->getScalarSizeInBits();
1063 Value *NewTrueVal = NewFoldedConst(
false, TrueVal);
1065 NewFoldedConst(
true, FalseVal));
1069 Value *NewTrueVal = NewFoldedConst(
true, TrueVal);
1071 NewFoldedConst(
false, FalseVal));
1092 if (Op0 && Op1 && LHSOpcode == RHSOpcode)
1212static std::optional<std::pair<Value *, Value *>>
1214 if (
LHS->getParent() !=
RHS->getParent())
1215 return std::nullopt;
1217 if (
LHS->getNumIncomingValues() < 2)
1218 return std::nullopt;
1221 return std::nullopt;
1223 Value *L0 =
LHS->getIncomingValue(0);
1224 Value *R0 =
RHS->getIncomingValue(0);
1226 for (
unsigned I = 1, E =
LHS->getNumIncomingValues();
I != E; ++
I) {
1230 if ((L0 == L1 && R0 == R1) || (L0 == R1 && R0 == L1))
1233 return std::nullopt;
1236 return std::optional(std::pair(L0, R0));
1239std::optional<std::pair<Value *, Value *>>
1240InstCombinerImpl::matchSymmetricPair(
Value *LHS,
Value *RHS) {
1241 Instruction *LHSInst = dyn_cast<Instruction>(LHS);
1242 Instruction *RHSInst = dyn_cast<Instruction>(RHS);
1244 return std::nullopt;
1246 case Instruction::PHI:
1248 case Instruction::Select: {
1254 return std::pair(TrueVal, FalseVal);
1255 return std::nullopt;
1257 case Instruction::Call: {
1261 if (LHSMinMax && RHSMinMax &&
1268 return std::pair(LHSMinMax->
getLHS(), LHSMinMax->
getRHS());
1269 return std::nullopt;
1272 return std::nullopt;
1282 if (!LHSIsSelect && !RHSIsSelect)
1287 if (isa<FPMathOperator>(&
I)) {
1288 FMF =
I.getFastMathFlags();
1295 Value *
Cond, *True =
nullptr, *False =
nullptr;
1303 if (Opcode != Instruction::Add || (!True && !False) || (True && False))
1318 if (LHSIsSelect && RHSIsSelect &&
A ==
D) {
1327 else if (True && !False)
1335 if (
Value *NewSel = foldAddNegate(
B,
C,
RHS))
1342 if (
Value *NewSel = foldAddNegate(E,
F,
LHS))
1346 if (!True || !False)
1357 assert(!isa<Constant>(
I) &&
"Shouldn't invert users of constant");
1359 if (U == IgnoredUser)
1361 switch (cast<Instruction>(U)->
getOpcode()) {
1362 case Instruction::Select: {
1363 auto *SI = cast<SelectInst>(U);
1365 SI->swapProfMetadata();
1368 case Instruction::Br: {
1375 case Instruction::Xor:
1382 "canFreelyInvertAllUsersOf() ?");
1389Value *InstCombinerImpl::dyn_castNegVal(
Value *V)
const {
1399 if (
C->getType()->getElementType()->isIntegerTy())
1403 for (
unsigned i = 0, e = CV->getNumOperands(); i != e; ++i) {
1408 if (isa<UndefValue>(Elt))
1411 if (!isa<ConstantInt>(Elt))
1418 if (
auto *CV = dyn_cast<Constant>(V))
1419 if (CV->getType()->isVectorTy() &&
1420 CV->getType()->getScalarType()->isIntegerTy() && CV->getSplatValue())
1433Instruction *InstCombinerImpl::foldFBinOpOfIntCastsFromSign(
1434 BinaryOperator &BO,
bool OpsFromSigned, std::array<Value *, 2> IntOps,
1438 Type *IntTy = IntOps[0]->getType();
1443 unsigned MaxRepresentableBits =
1448 unsigned NumUsedLeadingBits[2] = {IntSz, IntSz};
1452 auto IsNonZero = [&](
unsigned OpNo) ->
bool {
1453 if (OpsKnown[OpNo].hasKnownBits() &&
1454 OpsKnown[OpNo].getKnownBits(
SQ).isNonZero())
1459 auto IsNonNeg = [&](
unsigned OpNo) ->
bool {
1463 return OpsKnown[OpNo].getKnownBits(
SQ).isNonNegative();
1467 auto IsValidPromotion = [&](
unsigned OpNo) ->
bool {
1469 if (OpsFromSigned != isa<SIToFPInst>(BO.
getOperand(OpNo)) &&
1478 if (MaxRepresentableBits < IntSz) {
1488 NumUsedLeadingBits[OpNo] =
1489 IntSz - OpsKnown[OpNo].getKnownBits(
SQ).countMinLeadingZeros();
1497 if (MaxRepresentableBits < NumUsedLeadingBits[OpNo])
1500 return !OpsFromSigned || BO.
getOpcode() != Instruction::FMul ||
1505 if (Op1FpC !=
nullptr) {
1507 if (OpsFromSigned && BO.
getOpcode() == Instruction::FMul &&
1512 OpsFromSigned ? Instruction::FPToSI : Instruction::FPToUI, Op1FpC,
1514 if (Op1IntC ==
nullptr)
1517 : Instruction::UIToFP,
1518 Op1IntC, FPTy,
DL) != Op1FpC)
1522 IntOps[1] = Op1IntC;
1526 if (IntTy != IntOps[1]->
getType())
1529 if (Op1FpC ==
nullptr) {
1530 if (!IsValidPromotion(1))
1533 if (!IsValidPromotion(0))
1539 bool NeedsOverflowCheck =
true;
1542 unsigned OverflowMaxOutputBits = OpsFromSigned ? 2 : 1;
1543 unsigned OverflowMaxCurBits =
1544 std::max(NumUsedLeadingBits[0], NumUsedLeadingBits[1]);
1545 bool OutputSigned = OpsFromSigned;
1547 case Instruction::FAdd:
1548 IntOpc = Instruction::Add;
1549 OverflowMaxOutputBits += OverflowMaxCurBits;
1551 case Instruction::FSub:
1552 IntOpc = Instruction::Sub;
1553 OverflowMaxOutputBits += OverflowMaxCurBits;
1555 case Instruction::FMul:
1556 IntOpc = Instruction::Mul;
1557 OverflowMaxOutputBits += OverflowMaxCurBits * 2;
1563 if (OverflowMaxOutputBits < IntSz) {
1564 NeedsOverflowCheck =
false;
1567 if (IntOpc == Instruction::Sub)
1568 OutputSigned =
true;
1574 if (NeedsOverflowCheck &&
1575 !willNotOverflow(IntOpc, IntOps[0], IntOps[1], BO, OutputSigned))
1579 if (
auto *IntBO = dyn_cast<BinaryOperator>(IntBinOp)) {
1580 IntBO->setHasNoSignedWrap(OutputSigned);
1581 IntBO->setHasNoUnsignedWrap(!OutputSigned);
1594 std::array<Value *, 2> IntOps = {
nullptr,
nullptr};
1614 if (
Instruction *R = foldFBinOpOfIntCastsFromSign(BO,
false,
1615 IntOps, Op1FpC, OpsKnown))
1617 return foldFBinOpOfIntCastsFromSign(BO,
true, IntOps,
1633 !
X->getType()->isIntOrIntVectorTy(1))
1652 C = dyn_cast<Constant>(IsTrueArm ? SI->getTrueValue()
1653 : SI->getFalseValue());
1654 }
else if (
match(SI->getCondition(),
1660 C = dyn_cast<Constant>(
Op);
1681 bool FoldWithMultiUse) {
1683 if (!SI->hasOneUse() && !FoldWithMultiUse)
1686 Value *TV = SI->getTrueValue();
1687 Value *FV = SI->getFalseValue();
1688 if (!(isa<Constant>(TV) || isa<Constant>(FV)))
1692 if (SI->getType()->isIntOrIntVectorTy(1))
1702 if (
auto *CI = dyn_cast<FCmpInst>(SI->getCondition())) {
1703 if (CI->hasOneUse()) {
1704 Value *Op0 = CI->getOperand(0), *Op1 = CI->getOperand(1);
1705 if ((TV == Op0 && FV == Op1) || (FV == Op0 && TV == Op1))
1713 if (!NewTV && !NewFV)
1751 const ICmpInst *ICmp = dyn_cast<ICmpInst>(&
I);
1755 std::optional<bool> ImpliedCond =
1757 Ops[0], Ops[1],
DL, LHSIsTrue);
1767 if (NumPHIValues == 0)
1777 if (UI != &
I && !
I.isIdenticalTo(UI))
1788 Value *NonSimplifiedInVal =
nullptr;
1789 for (
unsigned i = 0; i != NumPHIValues; ++i) {
1798 if (NonSimplifiedBB)
return nullptr;
1800 NonSimplifiedBB = InBB;
1801 NonSimplifiedInVal = InVal;
1806 if (isa<InvokeInst>(InVal))
1807 if (cast<Instruction>(InVal)->
getParent() == NonSimplifiedBB)
1824 if (NonSimplifiedBB !=
nullptr) {
1840 if (NonSimplifiedBB) {
1844 U = NonSimplifiedInVal;
1846 U = U->DoPHITranslation(PN->
getParent(), NonSimplifiedBB);
1851 for (
unsigned i = 0; i != NumPHIValues; ++i) {
1852 if (NewPhiValues[i])
1860 if (
User == &
I)
continue;
1866 const_cast<PHINode &
>(*NewPN),
1875 auto *Phi0 = dyn_cast<PHINode>(BO.
getOperand(0));
1876 auto *Phi1 = dyn_cast<PHINode>(BO.
getOperand(1));
1877 if (!Phi0 || !Phi1 || !Phi0->hasOneUse() || !Phi1->hasOneUse() ||
1878 Phi0->getNumOperands() != Phi1->getNumOperands())
1899 auto CanFoldIncomingValuePair = [&](std::tuple<Use &, Use &>
T) {
1900 auto &Phi0Use = std::get<0>(
T);
1901 auto &Phi1Use = std::get<1>(
T);
1902 if (Phi0->getIncomingBlock(Phi0Use) != Phi1->getIncomingBlock(Phi1Use))
1904 Value *Phi0UseV = Phi0Use.get();
1905 Value *Phi1UseV = Phi1Use.get();
1908 else if (Phi1UseV ==
C)
1915 if (
all_of(
zip(Phi0->operands(), Phi1->operands()),
1916 CanFoldIncomingValuePair)) {
1919 assert(NewIncomingValues.
size() == Phi0->getNumOperands() &&
1920 "The number of collected incoming values should equal the number "
1921 "of the original PHINode operands!");
1922 for (
unsigned I = 0;
I < Phi0->getNumOperands();
I++)
1923 NewPhi->
addIncoming(NewIncomingValues[
I], Phi0->getIncomingBlock(
I));
1928 if (Phi0->getNumOperands() != 2 || Phi1->getNumOperands() != 2)
1935 ConstBB = Phi0->getIncomingBlock(0);
1936 OtherBB = Phi0->getIncomingBlock(1);
1938 ConstBB = Phi0->getIncomingBlock(1);
1939 OtherBB = Phi0->getIncomingBlock(0);
1949 auto *PredBlockBranch = dyn_cast<BranchInst>(OtherBB->
getTerminator());
1950 if (!PredBlockBranch || PredBlockBranch->isConditional() ||
1957 for (
auto BBIter = BO.
getParent()->
begin(); &*BBIter != &BO; ++BBIter)
1970 Phi0->getIncomingValueForBlock(OtherBB),
1971 Phi1->getIncomingValueForBlock(OtherBB));
1972 if (
auto *NotFoldedNewBO = dyn_cast<BinaryOperator>(NewBO))
1973 NotFoldedNewBO->copyIRFlags(&BO);
1983 if (!isa<Constant>(
I.getOperand(1)))
1986 if (
auto *Sel = dyn_cast<SelectInst>(
I.getOperand(0))) {
1989 }
else if (
auto *PN = dyn_cast<PHINode>(
I.getOperand(0))) {
2000 if (
GEP.hasAllZeroIndices() && !Src.hasAllZeroIndices() &&
2007 if (!isa<VectorType>(Inst.
getType()))
2013 cast<VectorType>(Inst.
getType())->getElementCount());
2015 cast<VectorType>(Inst.
getType())->getElementCount());
2020 Value *L0, *L1, *R0, *R1;
2025 cast<ShuffleVectorInst>(
LHS)->isConcat() &&
2026 cast<ShuffleVectorInst>(
RHS)->isConcat()) {
2033 if (
auto *BO = dyn_cast<BinaryOperator>(NewBO0))
2036 if (
auto *BO = dyn_cast<BinaryOperator>(NewBO1))
2043 if (
auto *BO = dyn_cast<BinaryOperator>(V))
2047 M, Intrinsic::experimental_vector_reverse, V->getType());
2060 return createBinOpReverse(V1, V2);
2064 return createBinOpReverse(V1,
RHS);
2068 return createBinOpReverse(
LHS, V2);
2078 if (
auto *BO = dyn_cast<BinaryOperator>(XY))
2087 V1->
getType() == V2->getType() &&
2090 return createBinOpShuffle(V1, V2, Mask);
2099 auto *LShuf = cast<ShuffleVectorInst>(
LHS);
2100 auto *RShuf = cast<ShuffleVectorInst>(
RHS);
2105 if (LShuf->isSelect() &&
2107 RShuf->isSelect() &&
2125 auto *InstVTy = dyn_cast<FixedVectorType>(Inst.
getType());
2130 cast<FixedVectorType>(V1->
getType())->getNumElements() <=
2131 InstVTy->getNumElements()) {
2133 "Shuffle should not change scalar type");
2140 bool ConstOp1 = isa<Constant>(
RHS);
2142 unsigned SrcVecNumElts =
2143 cast<FixedVectorType>(V1->
getType())->getNumElements();
2146 bool MayChange =
true;
2147 unsigned NumElts = InstVTy->getNumElements();
2148 for (
unsigned I = 0;
I < NumElts; ++
I) {
2150 if (ShMask[
I] >= 0) {
2151 assert(ShMask[
I] < (
int)NumElts &&
"Not expecting narrowing shuffle");
2159 if (!CElt || (!isa<PoisonValue>(NewCElt) && NewCElt != CElt) ||
2160 I >= SrcVecNumElts) {
2164 NewVecC[ShMask[
I]] = CElt;
2175 if (
I >= SrcVecNumElts || ShMask[
I] < 0) {
2180 if (!MaybePoison || !isa<PoisonValue>(MaybePoison)) {
2197 Value *NewLHS = ConstOp1 ? V1 : NewC;
2198 Value *NewRHS = ConstOp1 ? NewC : V1;
2199 return createBinOpShuffle(NewLHS, NewRHS, Mask);
2206 if (isa<ShuffleVectorInst>(
RHS))
2239 if (isa<FPMathOperator>(R)) {
2240 R->copyFastMathFlags(&Inst);
2243 if (
auto *NewInstBO = dyn_cast<BinaryOperator>(NewBO))
2244 NewInstBO->copyIRFlags(R);
2273 cast<Operator>(Op1)->getOpcode() == CastOpc &&
2274 (Op0->
hasOneUse() || Op1->hasOneUse()))) {
2292 if (!willNotOverflow(BO.
getOpcode(),
X,
Y, BO, IsSext))
2298 if (
auto *NewBinOp = dyn_cast<BinaryOperator>(NarrowBO)) {
2300 NewBinOp->setHasNoSignedWrap();
2302 NewBinOp->setHasNoUnsignedWrap();
2320 if (!
GEP.hasAllConstantIndices())
2335 bool IsInBounds =
GEP.isInBounds();
2336 Type *Ty =
GEP.getSourceElementType();
2337 Value *NewTrueC = Builder.
CreateGEP(Ty, TrueC, IndexC,
"", IsInBounds);
2338 Value *NewFalseC = Builder.
CreateGEP(Ty, FalseC, IndexC,
"", IsInBounds);
2348 if (
GEP.getNumIndices() != 1)
2357 Type *PtrTy = Src->getType()->getScalarType();
2358 unsigned IndexSizeInBits =
DL.getIndexTypeSizeInBits(PtrTy);
2365 if (isa<ScalableVectorType>(
BaseType))
2369 if (NewOffset.
isZero() ||
2370 (Src->hasOneUse() &&
GEP.getOperand(1)->hasOneUse())) {
2391 Type *PtrTy = Src->getType()->getScalarType();
2392 if (
GEP.hasAllConstantIndices() &&
2393 (Src->hasOneUse() || Src->hasAllConstantIndices())) {
2397 bool IsFirstType =
true;
2398 unsigned NumVarIndices = 0;
2399 for (
auto Pair :
enumerate(Src->indices())) {
2400 if (!isa<ConstantInt>(Pair.value())) {
2402 IsFirstType =
false;
2403 NumVarIndices = Pair.index() + 1;
2410 if (NumVarIndices != Src->getNumIndices()) {
2431 if (!
Offset.isZero() || (!IsFirstType && !ConstIndices[0].isZero())) {
2434 if (Src->hasAllConstantIndices())
2446 Src->getNumIndices() - NumVarIndices));
2453 IsInBounds &=
Idx.isNonNegative() == ConstIndices[0].isNonNegative();
2458 Indices,
"", IsInBounds));
2461 if (Src->getResultElementType() !=
GEP.getSourceElementType())
2467 bool EndsWithSequential =
false;
2470 EndsWithSequential =
I.isSequential();
2473 if (EndsWithSequential) {
2476 Value *SO1 = Src->getOperand(Src->getNumOperands()-1);
2494 if (Src->getNumOperands() == 2) {
2500 Indices.
append(Src->op_begin()+1, Src->op_end()-1);
2503 }
else if (isa<Constant>(*
GEP.idx_begin()) &&
2504 cast<Constant>(*
GEP.idx_begin())->isNullValue() &&
2505 Src->getNumOperands() != 1) {
2507 Indices.
append(Src->op_begin()+1, Src->op_end());
2511 if (!Indices.
empty())
2514 Src->getSourceElementType(), Src->getOperand(0), Indices,
"",
2522 bool &DoesConsume,
unsigned Depth) {
2523 static Value *
const NonNull =
reinterpret_cast<Value *
>(uintptr_t(1));
2541 if (!WillInvertAllUses)
2546 if (
auto *
I = dyn_cast<CmpInst>(V)) {
2557 DoesConsume,
Depth))
2560 DoesConsume,
Depth))
2569 DoesConsume,
Depth))
2572 DoesConsume,
Depth))
2581 DoesConsume,
Depth))
2590 DoesConsume,
Depth))
2602 bool LocalDoesConsume = DoesConsume;
2604 LocalDoesConsume,
Depth))
2607 LocalDoesConsume,
Depth)) {
2608 DoesConsume = LocalDoesConsume;
2611 DoesConsume,
Depth);
2612 assert(NotB !=
nullptr &&
2613 "Unable to build inverted value for known freely invertable op");
2614 if (
auto *II = dyn_cast<IntrinsicInst>(V))
2623 if (
PHINode *PN = dyn_cast<PHINode>(V)) {
2624 bool LocalDoesConsume = DoesConsume;
2626 for (
Use &U : PN->operands()) {
2627 BasicBlock *IncomingBlock = PN->getIncomingBlock(U);
2631 if (NewIncomingVal ==
nullptr)
2634 if (NewIncomingVal == V)
2637 IncomingValues.
emplace_back(NewIncomingVal, IncomingBlock);
2640 DoesConsume = LocalDoesConsume;
2646 for (
auto [Val, Pred] : IncomingValues)
2655 DoesConsume,
Depth))
2662 DoesConsume,
Depth))
2671 bool IsLogical,
Value *
A,
2673 bool LocalDoesConsume = DoesConsume;
2675 LocalDoesConsume,
Depth))
2678 LocalDoesConsume,
Depth)) {
2680 LocalDoesConsume,
Depth);
2681 DoesConsume = LocalDoesConsume;
2691 return TryInvertAndOrUsingDeMorgan(Instruction::And,
false,
A,
2695 return TryInvertAndOrUsingDeMorgan(Instruction::Or,
false,
A,
2699 return TryInvertAndOrUsingDeMorgan(Instruction::And,
true,
A,
2703 return TryInvertAndOrUsingDeMorgan(Instruction::Or,
true,
A,
2712 Type *GEPType =
GEP.getType();
2713 Type *GEPEltType =
GEP.getSourceElementType();
2722 if (
auto *GEPFVTy = dyn_cast<FixedVectorType>(GEPType)) {
2723 auto VWidth = GEPFVTy->getNumElements();
2724 APInt PoisonElts(VWidth, 0);
2740 bool MadeChange =
false;
2744 Type *NewScalarIndexTy =
2754 Type *IndexTy = (*I)->getType();
2755 Type *NewIndexType =
2758 cast<VectorType>(IndexTy)->getElementCount())
2770 if (IndexTy != NewIndexType) {
2782 if (!GEPEltType->
isIntegerTy(8) &&
GEP.hasAllConstantIndices()) {
2791 if (
auto *PN = dyn_cast<PHINode>(PtrOp)) {
2792 auto *Op1 = dyn_cast<GetElementPtrInst>(PN->getOperand(0));
2807 for (
auto I = PN->op_begin()+1, E = PN->op_end();
I !=E; ++
I) {
2808 auto *Op2 = dyn_cast<GetElementPtrInst>(*
I);
2809 if (!Op2 || Op1->getNumOperands() != Op2->getNumOperands() ||
2810 Op1->getSourceElementType() != Op2->getSourceElementType())
2818 Type *CurTy =
nullptr;
2820 for (
unsigned J = 0,
F = Op1->getNumOperands(); J !=
F; ++J) {
2821 if (Op1->getOperand(J)->getType() != Op2->getOperand(J)->getType())
2824 if (Op1->getOperand(J) != Op2->getOperand(J)) {
2833 assert(CurTy &&
"No current type?");
2853 CurTy = Op1->getSourceElementType();
2865 if (DI != -1 && !PN->hasOneUse())
2868 auto *NewGEP = cast<GetElementPtrInst>(Op1->clone());
2881 PN->getNumOperands());
2884 for (
auto &
I : PN->operands())
2885 NewPN->
addIncoming(cast<GEPOperator>(
I)->getOperand(DI),
2886 PN->getIncomingBlock(
I));
2888 NewGEP->setOperand(DI, NewPN);
2891 NewGEP->insertBefore(*
GEP.getParent(),
GEP.getParent()->getFirstInsertionPt());
2895 if (
auto *Src = dyn_cast<GEPOperator>(PtrOp))
2901 if (
GEP.getNumIndices() == 1 && !IsGEPSrcEleScalable) {
2902 unsigned AS =
GEP.getPointerAddressSpace();
2903 if (
GEP.getOperand(1)->getType()->getScalarSizeInBits() ==
2907 if (TyAllocSize == 1) {
2916 GEPType ==
Y->getType()) {
2917 bool HasSameUnderlyingObject =
2919 bool Changed =
false;
2920 GEP.replaceUsesWithIf(
Y, [&](
Use &U) {
2921 bool ShouldReplace = HasSameUnderlyingObject ||
2922 isa<ICmpInst>(U.getUser()) ||
2923 isa<PtrToIntInst>(U.getUser());
2924 Changed |= ShouldReplace;
2925 return ShouldReplace;
2927 return Changed ? &
GEP :
nullptr;
2950 if (
GEP.getNumIndices() == 1) {
2961 GEP.getPointerOperand(), Idx1);
2975 GEP.getResultElementType(),
GEP.getPointerOperand(),
2978 GEP.getResultElementType(), NewPtr,
2983 if (!
GEP.isInBounds()) {
2986 APInt BasePtrOffset(IdxWidth, 0);
2987 Value *UnderlyingPtrOp =
2990 bool CanBeNull, CanBeFreed;
2992 DL, CanBeNull, CanBeFreed);
2993 if (!CanBeNull && !CanBeFreed && DerefBytes != 0) {
2994 if (
GEP.accumulateConstantOffset(
DL, BasePtrOffset) &&
2996 APInt AllocSize(IdxWidth, DerefBytes);
2997 if (BasePtrOffset.
ule(AllocSize)) {
2999 GEP.getSourceElementType(), PtrOp, Indices,
GEP.getName());
3013 if (isa<ConstantPointerNull>(V))
3015 if (
auto *LI = dyn_cast<LoadInst>(V))
3016 return isa<GlobalVariable>(LI->getPointerOperand());
3040 return Dest && Dest->Ptr == UsedV;
3054 switch (
I->getOpcode()) {
3059 case Instruction::AddrSpaceCast:
3060 case Instruction::BitCast:
3061 case Instruction::GetElementPtr:
3066 case Instruction::ICmp: {
3073 unsigned OtherIndex = (ICI->
getOperand(0) == PI) ? 1 : 0;
3080 auto AlignmentAndSizeKnownValid = [](
CallBase *CB) {
3084 const APInt *Alignment;
3086 return match(CB->getArgOperand(0),
m_APInt(Alignment)) &&
3090 auto *CB = dyn_cast<CallBase>(AI);
3092 if (CB && TLI.
getLibFunc(*CB->getCalledFunction(), TheLibFunc) &&
3093 TLI.
has(TheLibFunc) && TheLibFunc == LibFunc_aligned_alloc &&
3094 !AlignmentAndSizeKnownValid(CB))
3100 case Instruction::Call:
3107 case Intrinsic::memmove:
3108 case Intrinsic::memcpy:
3109 case Intrinsic::memset: {
3111 if (
MI->isVolatile() ||
MI->getRawDest() != PI)
3115 case Intrinsic::assume:
3116 case Intrinsic::invariant_start:
3117 case Intrinsic::invariant_end:
3118 case Intrinsic::lifetime_start:
3119 case Intrinsic::lifetime_end:
3120 case Intrinsic::objectsize:
3123 case Intrinsic::launder_invariant_group:
3124 case Intrinsic::strip_invariant_group:
3153 case Instruction::Store: {
3155 if (SI->isVolatile() || SI->getPointerOperand() != PI)
3163 }
while (!Worklist.
empty());
3186 std::unique_ptr<DIBuilder> DIB;
3187 if (isa<AllocaInst>(
MI)) {
3193 for (
unsigned i = 0, e =
Users.size(); i != e; ++i) {
3205 II,
DL, &
TLI,
AA,
true, &InsertedInstructions);
3206 for (
Instruction *Inserted : InsertedInstructions)
3214 for (
unsigned i = 0, e =
Users.size(); i != e; ++i) {
3223 C->isFalseWhenEqual()));
3224 }
else if (
auto *SI = dyn_cast<StoreInst>(
I)) {
3225 for (
auto *DVI : DVIs)
3226 if (DVI->isAddressOfVariable())
3228 for (
auto *DVR : DVRs)
3229 if (DVR->isAddressOfVariable())
3272 for (
auto *DVI : DVIs)
3273 if (DVI->isAddressOfVariable() || DVI->getExpression()->startsWithDeref())
3274 DVI->eraseFromParent();
3275 for (
auto *DVR : DVRs)
3276 if (DVR->isAddressOfVariable() || DVR->getExpression()->startsWithDeref())
3277 DVR->eraseFromParent();
3323 if (FreeInstrBB->
size() != 2) {
3325 if (&Inst == &FI || &Inst == FreeInstrBBTerminator)
3327 auto *Cast = dyn_cast<CastInst>(&Inst);
3328 if (!Cast || !Cast->isNoopCast(
DL))
3349 "Broken CFG: missing edge from predecessor to successor");
3354 if (&Instr == FreeInstrBBTerminator)
3356 Instr.moveBeforePreserving(TI);
3359 "Only the branch instruction should remain");
3370 Attrs = Attrs.removeParamAttribute(FI.
getContext(), 0, Attribute::NonNull);
3371 Attribute Dereferenceable = Attrs.getParamAttr(0, Attribute::Dereferenceable);
3372 if (Dereferenceable.
isValid()) {
3374 Attrs = Attrs.removeParamAttribute(FI.
getContext(), 0,
3375 Attribute::Dereferenceable);
3376 Attrs = Attrs.addDereferenceableOrNullParamAttr(FI.
getContext(), 0, Bytes);
3385 if (isa<UndefValue>(
Op)) {
3393 if (isa<ConstantPointerNull>(
Op))
3429 FPClassTest ReturnClass =
F->getAttributes().getRetNoFPClass();
3430 if (ReturnClass ==
fcNone)
3447 bool Changed =
false;
3448 while (
Instruction *Prev =
I.getPrevNonDebugInstruction()) {
3453 if (Prev->isEHPad())
3484 return BBI->isDebugOrPseudoInst() ||
3485 (isa<BitCastInst>(BBI) && BBI->getType()->isPointerTy());
3490 if (BBI != FirstInstr)
3492 }
while (BBI != FirstInstr && IsNoopInstrForStoreMerging(BBI));
3494 return dyn_cast<StoreInst>(BBI);
3506 if (!
DeadEdges.insert({From, To}).second)
3511 for (
Use &U : PN.incoming_values())
3512 if (PN.getIncomingBlock(U) ==
From && !isa<PoisonValue>(U)) {
3528 std::next(
I->getReverseIterator())))) {
3529 if (!Inst.use_empty() && !Inst.getType()->isTokenTy()) {
3533 if (Inst.isEHPad() || Inst.getType()->isTokenTy())
3536 Inst.dropDbgRecords();
3544 for (
Value *V : Changed)
3571 if (Succ == LiveSucc)
3599 if (isa<SelectInst>(
Cond) &&
3620 auto *Cmp = cast<CmpInst>(
Cond);
3629 if (isa<UndefValue>(
Cond)) {
3633 if (
auto *CI = dyn_cast<ConstantInt>(
Cond)) {
3649 unsigned CstOpIdx = IsTrueArm ? 1 : 2;
3650 auto *
C = dyn_cast<ConstantInt>(
Select->getOperand(CstOpIdx));
3654 BasicBlock *CstBB = SI.findCaseValue(
C)->getCaseSuccessor();
3655 if (CstBB != SI.getDefaultDest())
3668 for (
auto Case : SI.cases())
3669 if (!CR.
contains(Case.getCaseValue()->getValue()))
3681 for (
auto Case : SI.cases()) {
3683 assert(isa<ConstantInt>(NewCase) &&
3684 "Result of expression should be constant");
3685 Case.setValue(cast<ConstantInt>(NewCase));
3693 for (
auto Case : SI.cases()) {
3695 assert(isa<ConstantInt>(NewCase) &&
3696 "Result of expression should be constant");
3697 Case.setValue(cast<ConstantInt>(NewCase));
3705 all_of(SI.cases(), [&](
const auto &Case) {
3706 return Case.getCaseValue()->getValue().countr_zero() >= ShiftAmt;
3712 Value *NewCond = Op0;
3719 for (
auto Case : SI.cases()) {
3720 const APInt &CaseVal = Case.getCaseValue()->getValue();
3722 : CaseVal.
lshr(ShiftAmt);
3723 Case.setValue(ConstantInt::get(SI.getContext(), ShiftedCase));
3731 bool IsZExt = isa<ZExtInst>(
Cond);
3735 if (
all_of(SI.cases(), [&](
const auto &Case) {
3736 const APInt &CaseVal = Case.getCaseValue()->getValue();
3737 return IsZExt ? CaseVal.isIntN(NewWidth)
3738 : CaseVal.isSignedIntN(NewWidth);
3740 for (
auto &Case : SI.cases()) {
3741 APInt TruncatedCase = Case.getCaseValue()->getValue().
trunc(NewWidth);
3742 Case.setValue(ConstantInt::get(SI.getContext(), TruncatedCase));
3749 if (
auto *
Select = dyn_cast<SelectInst>(
Cond)) {
3764 for (
const auto &
C : SI.cases()) {
3766 std::min(LeadingKnownZeros,
C.getCaseValue()->getValue().countl_zero());
3768 std::min(LeadingKnownOnes,
C.getCaseValue()->getValue().countl_one());
3771 unsigned NewWidth = Known.
getBitWidth() - std::max(LeadingKnownZeros, LeadingKnownOnes);
3777 if (NewWidth > 0 && NewWidth < Known.
getBitWidth() &&
3778 shouldChangeType(Known.
getBitWidth(), NewWidth)) {
3783 for (
auto Case : SI.cases()) {
3784 APInt TruncatedCase = Case.getCaseValue()->getValue().
trunc(NewWidth);
3785 Case.setValue(ConstantInt::get(SI.getContext(), TruncatedCase));
3790 if (isa<UndefValue>(
Cond)) {
3794 if (
auto *CI = dyn_cast<ConstantInt>(
Cond)) {
3796 SI.findCaseValue(CI)->getCaseSuccessor());
3810 const APInt *
C =
nullptr;
3812 if (*EV.
idx_begin() == 0 && (OvID == Intrinsic::smul_with_overflow ||
3813 OvID == Intrinsic::umul_with_overflow)) {
3818 if (
C->isPowerOf2()) {
3819 return BinaryOperator::CreateShl(
3821 ConstantInt::get(WO->getLHS()->getType(),
C->logBase2()));
3829 if (!WO->hasOneUse())
3843 assert(*EV.
idx_begin() == 1 &&
"Unexpected extract index for overflow inst");
3846 if (OvID == Intrinsic::usub_with_overflow)
3851 if (OvID == Intrinsic::smul_with_overflow &&
3852 WO->getLHS()->getType()->isIntOrIntVectorTy(1))
3853 return BinaryOperator::CreateAnd(WO->getLHS(), WO->getRHS());
3856 if (OvID == Intrinsic::umul_with_overflow && WO->getLHS() == WO->getRHS()) {
3857 unsigned BitWidth = WO->getLHS()->getType()->getScalarSizeInBits();
3862 ConstantInt::get(WO->getLHS()->getType(),
3873 WO->getBinaryOp(), *
C, WO->getNoWrapKind());
3878 auto *OpTy = WO->getRHS()->getType();
3879 auto *NewLHS = WO->getLHS();
3883 ConstantInt::get(OpTy, NewRHSC));
3901 const unsigned *exti, *exte, *insi, *inse;
3902 for (exti = EV.
idx_begin(), insi =
IV->idx_begin(),
3903 exte = EV.
idx_end(), inse =
IV->idx_end();
3904 exti != exte && insi != inse;
3918 if (exti == exte && insi == inse)
3951 if (
Instruction *R = foldExtractOfOverflowIntrinsic(EV))
3954 if (
LoadInst *L = dyn_cast<LoadInst>(Agg)) {
3956 if (
auto *STy = dyn_cast<StructType>(Agg->
getType());
3957 STy && STy->containsScalableVectorType())
3965 if (L->isSimple() && L->hasOneUse()) {
3977 L->getPointerOperand(), Indices);
3981 NL->setAAMetadata(L->getAAMetadata());
3988 if (
auto *PN = dyn_cast<PHINode>(Agg))
3994 if (
auto *SI = dyn_cast<SelectInst>(Agg))
4011 switch (Personality) {
4041 cast<ArrayType>(
LHS->
getType())->getNumElements()
4043 cast<ArrayType>(
RHS->
getType())->getNumElements();
4055 bool MakeNewInstruction =
false;
4057 bool CleanupFlag =
LI.isCleanup();
4060 for (
unsigned i = 0, e =
LI.getNumClauses(); i != e; ++i) {
4061 bool isLastClause = i + 1 == e;
4062 if (
LI.isCatch(i)) {
4069 if (AlreadyCaught.
insert(TypeInfo).second) {
4074 MakeNewInstruction =
true;
4081 MakeNewInstruction =
true;
4082 CleanupFlag =
false;
4093 assert(
LI.isFilter(i) &&
"Unsupported landingpad clause!");
4101 if (!NumTypeInfos) {
4104 MakeNewInstruction =
true;
4105 CleanupFlag =
false;
4109 bool MakeNewFilter =
false;
4111 if (isa<ConstantAggregateZero>(FilterClause)) {
4113 assert(NumTypeInfos > 0 &&
"Should have handled empty filter already!");
4119 MakeNewInstruction =
true;
4126 if (NumTypeInfos > 1)
4127 MakeNewFilter =
true;
4131 NewFilterElts.
reserve(NumTypeInfos);
4136 bool SawCatchAll =
false;
4137 for (
unsigned j = 0; j != NumTypeInfos; ++j) {
4165 if (SeenInFilter.
insert(TypeInfo).second)
4166 NewFilterElts.
push_back(cast<Constant>(Elt));
4171 MakeNewInstruction =
true;
4176 if (NewFilterElts.
size() < NumTypeInfos)
4177 MakeNewFilter =
true;
4179 if (MakeNewFilter) {
4181 NewFilterElts.
size());
4183 MakeNewInstruction =
true;
4192 if (MakeNewFilter && !NewFilterElts.
size()) {
4193 assert(MakeNewInstruction &&
"New filter but not a new instruction!");
4194 CleanupFlag =
false;
4205 for (
unsigned i = 0, e = NewClauses.
size(); i + 1 < e; ) {
4208 for (j = i; j != e; ++j)
4209 if (!isa<ArrayType>(NewClauses[j]->
getType()))
4215 for (
unsigned k = i; k + 1 < j; ++k)
4219 std::stable_sort(NewClauses.
begin() + i, NewClauses.
begin() + j,
4221 MakeNewInstruction =
true;
4240 for (
unsigned i = 0; i + 1 < NewClauses.
size(); ++i) {
4250 for (
unsigned j = NewClauses.
size() - 1; j != i; --j) {
4251 Value *LFilter = NewClauses[j];
4262 NewClauses.
erase(J);
4263 MakeNewInstruction =
true;
4273 if (isa<ConstantAggregateZero>(LFilter)) {
4276 if (isa<ConstantAggregateZero>(
Filter)) {
4277 assert(FElts <= LElts &&
"Should have handled this case earlier!");
4279 NewClauses.
erase(J);
4280 MakeNewInstruction =
true;
4286 if (isa<ConstantAggregateZero>(
Filter)) {
4289 assert(FElts > 0 &&
"Should have eliminated the empty filter earlier!");
4290 for (
unsigned l = 0; l != LElts; ++l)
4293 NewClauses.
erase(J);
4294 MakeNewInstruction =
true;
4305 bool AllFound =
true;
4306 for (
unsigned f = 0; f != FElts; ++f) {
4309 for (
unsigned l = 0; l != LElts; ++l) {
4311 if (LTypeInfo == FTypeInfo) {
4321 NewClauses.
erase(J);
4322 MakeNewInstruction =
true;
4330 if (MakeNewInstruction) {
4333 for (
unsigned i = 0, e = NewClauses.
size(); i != e; ++i)
4338 if (NewClauses.
empty())
4346 if (
LI.isCleanup() != CleanupFlag) {
4347 assert(!CleanupFlag &&
"Adding a cleanup, not removing one?!");
4348 LI.setCleanup(CleanupFlag);
4372 auto *OrigOpInst = dyn_cast<Instruction>(OrigOp);
4377 if (!OrigOpInst || !OrigOpInst->hasOneUse() || isa<PHINode>(OrigOp))
4391 Use *MaybePoisonOperand =
nullptr;
4392 for (
Use &U : OrigOpInst->operands()) {
4393 if (isa<MetadataAsValue>(U.get()) ||
4396 if (!MaybePoisonOperand)
4397 MaybePoisonOperand = &U;
4402 OrigOpInst->dropPoisonGeneratingAnnotations();
4405 if (!MaybePoisonOperand)
4410 MaybePoisonOperand->get(), MaybePoisonOperand->get()->
getName() +
".fr");
4412 replaceUse(*MaybePoisonOperand, FrozenMaybePoisonOperand);
4423 Use *StartU =
nullptr;
4441 Value *StartV = StartU->get();
4453 if (!Visited.
insert(V).second)
4456 if (Visited.
size() > 32)
4473 I->dropPoisonGeneratingAnnotations();
4475 if (StartNeedsFreeze) {
4487 if (isa<Constant>(
Op) ||
Op->hasOneUse())
4496 if (isa<Argument>(
Op)) {
4500 auto MoveBeforeOpt = cast<Instruction>(
Op)->getInsertionPointAfterDef();
4503 MoveBefore = *MoveBeforeOpt;
4507 if (isa<DbgInfoIntrinsic>(MoveBefore))
4508 MoveBefore = MoveBefore->getNextNonDebugInstruction()->getIterator();
4511 MoveBefore.setHeadBit(
false);
4513 bool Changed =
false;
4514 if (&FI != &*MoveBefore) {
4515 FI.
moveBefore(*MoveBefore->getParent(), MoveBefore);
4519 Op->replaceUsesWithIf(&FI, [&](
Use &U) ->
bool {
4521 Changed |= Dominates;
4530 for (
auto *U : V->users()) {
4531 if (isa<ShuffleVectorInst>(U))
4540 Value *Op0 =
I.getOperand(0);
4546 if (
auto *PN = dyn_cast<PHINode>(Op0)) {
4569 auto getUndefReplacement = [&
I](
Type *Ty) {
4572 for (
const auto *U :
I.users()) {
4581 else if (BestValue !=
C)
4582 BestValue = NullValue;
4584 assert(BestValue &&
"Must have at least one use");
4599 Constant *ReplaceC = getUndefReplacement(
I.getType()->getScalarType());
4614 auto *CB = dyn_cast<CallBase>(
I);
4633 for (
const User *U :
I.users()) {
4634 if (Visited.
insert(U).second)
4639 while (!AllocaUsers.
empty()) {
4640 auto *UserI = cast<Instruction>(AllocaUsers.
pop_back_val());
4641 if (isa<BitCastInst>(UserI) || isa<GetElementPtrInst>(UserI) ||
4642 isa<AddrSpaceCastInst>(UserI)) {
4663 if (isa<PHINode>(
I) ||
I->isEHPad() ||
I->mayThrow() || !
I->willReturn() ||
4671 if (isa<AllocaInst>(
I))
4679 if (
auto *CI = dyn_cast<CallInst>(
I)) {
4680 if (CI->isConvergent())
4686 if (
I->mayWriteToMemory()) {
4693 if (
I->mayReadFromMemory()) {
4700 E =
I->getParent()->end();
4702 if (Scan->mayWriteToMemory())
4706 I->dropDroppableUses([&](
const Use *U) {
4707 auto *
I = dyn_cast<Instruction>(U->getUser());
4708 if (
I &&
I->getParent() != DestBlock) {
4718 I->moveBefore(*DestBlock, InsertPos);
4729 if (!DbgUsers.
empty())
4731 if (!DbgVariableRecords.
empty())
4733 DbgVariableRecords);
4753 for (
auto &DbgUser : DbgUsers)
4754 if (DbgUser->getParent() != DestBlock)
4761 if (DVI->getParent() == SrcBlock)
4764 [](
auto *
A,
auto *
B) {
return B->comesBefore(
A); });
4768 for (
auto *
User : DbgUsersToSink) {
4773 if (isa<DbgDeclareInst>(
User))
4778 User->getDebugLoc()->getInlinedAt());
4780 if (!SunkVariables.
insert(DbgUserVariable).second)
4785 if (isa<DbgAssignIntrinsic>(
User))
4788 DIIClones.emplace_back(cast<DbgVariableIntrinsic>(
User->clone()));
4789 if (isa<DbgDeclareInst>(
User) && isa<CastInst>(
I))
4790 DIIClones.back()->replaceVariableLocationOp(
I,
I->getOperand(0));
4795 if (!DIIClones.empty()) {
4800 DIIClone->insertBefore(&*InsertPos);
4815 for (
auto &DVR : DbgVariableRecords)
4816 if (DVR->getParent() != DestBlock)
4817 DbgVariableRecordsToSalvage.
push_back(DVR);
4823 if (DVR->getParent() == SrcBlock)
4824 DbgVariableRecordsToSink.
push_back(DVR);
4831 return B->getInstruction()->comesBefore(
A->getInstruction());
4838 using InstVarPair = std::pair<const Instruction *, DebugVariable>;
4840 if (DbgVariableRecordsToSink.
size() > 1) {
4846 DVR->getDebugLoc()->getInlinedAt());
4847 CountMap[std::make_pair(DVR->getInstruction(), DbgUserVariable)] += 1;
4853 for (
auto It : CountMap) {
4854 if (It.second > 1) {
4855 FilterOutMap[It.first] =
nullptr;
4856 DupSet.
insert(It.first.first);
4867 DVR.getDebugLoc()->getInlinedAt());
4869 FilterOutMap.
find(std::make_pair(Inst, DbgUserVariable));
4870 if (FilterIt == FilterOutMap.
end())
4872 if (FilterIt->second !=
nullptr)
4874 FilterIt->second = &DVR;
4889 DVR->getDebugLoc()->getInlinedAt());
4893 if (!FilterOutMap.
empty()) {
4894 InstVarPair IVP = std::make_pair(DVR->getInstruction(), DbgUserVariable);
4895 auto It = FilterOutMap.
find(IVP);
4898 if (It != FilterOutMap.
end() && It->second != DVR)
4902 if (!SunkVariables.
insert(DbgUserVariable).second)
4905 if (DVR->isDbgAssign())
4913 if (DVRClones.
empty())
4927 assert(InsertPos.getHeadBit());
4929 InsertPos->getParent()->insertDbgRecordBefore(DVRClone, InsertPos);
4953 if (
I ==
nullptr)
continue;
4968 auto getOptionalSinkBlockForInst =
4969 [
this](
Instruction *
I) -> std::optional<BasicBlock *> {
4971 return std::nullopt;
4975 unsigned NumUsers = 0;
4977 for (
auto *U :
I->users()) {
4978 if (U->isDroppable())
4981 return std::nullopt;
4985 if (
PHINode *PN = dyn_cast<PHINode>(UserInst)) {
4986 for (
unsigned i = 0; i < PN->getNumIncomingValues(); i++) {
4987 if (PN->getIncomingValue(i) ==
I) {
4991 if (UserParent && UserParent != PN->getIncomingBlock(i))
4992 return std::nullopt;
4993 UserParent = PN->getIncomingBlock(i);
4996 assert(UserParent &&
"expected to find user block!");
4998 if (UserParent && UserParent != UserInst->
getParent())
4999 return std::nullopt;
5005 if (NumUsers == 0) {
5009 return std::nullopt;
5021 return std::nullopt;
5031 return std::nullopt;
5036 auto OptBB = getOptionalSinkBlockForInst(
I);
5038 auto *UserParent = *OptBB;
5046 for (
Use &U :
I->operands())
5047 if (
Instruction *OpI = dyn_cast<Instruction>(U.get()))
5055 I, {LLVMContext::MD_dbg, LLVMContext::MD_annotation});
5068 <<
" New = " << *Result <<
'\n');
5070 Result->copyMetadata(*
I,
5071 {LLVMContext::MD_dbg, LLVMContext::MD_annotation});
5073 I->replaceAllUsesWith(Result);
5076 Result->takeName(
I);
5083 if (isa<PHINode>(Result) != isa<PHINode>(
I)) {
5085 if (isa<PHINode>(
I))
5091 Result->insertInto(InstParent, InsertPos);
5100 <<
" New = " << *
I <<
'\n');
5132 if (!
I->hasMetadataOtherThanDebugLoc())
5135 auto Track = [](
Metadata *ScopeList,
auto &Container) {
5136 const auto *MDScopeList = dyn_cast_or_null<MDNode>(ScopeList);
5137 if (!MDScopeList || !Container.insert(MDScopeList).second)
5139 for (
const auto &
MDOperand : MDScopeList->operands())
5140 if (
auto *MDScope = dyn_cast<MDNode>(
MDOperand))
5141 Container.insert(MDScope);
5144 Track(
I->getMetadata(LLVMContext::MD_alias_scope), UsedAliasScopesAndLists);
5145 Track(
I->getMetadata(LLVMContext::MD_noalias), UsedNoAliasScopesAndLists);
5154 "llvm.experimental.noalias.scope.decl in use ?");
5157 "llvm.experimental.noalias.scope should refer to a single scope");
5159 if (
auto *MD = dyn_cast<MDNode>(
MDOperand))
5160 return !UsedAliasScopesAndLists.
contains(MD) ||
5161 !UsedNoAliasScopesAndLists.
contains(MD);
5186 if (Succ != LiveSucc &&
DeadEdges.insert({BB, Succ}).second)
5187 for (
PHINode &PN : Succ->phis())
5188 for (
Use &U : PN.incoming_values())
5189 if (PN.getIncomingBlock(U) == BB && !isa<PoisonValue>(U)) {
5199 HandleOnlyLiveSuccessor(BB,
nullptr);
5206 if (!Inst.use_empty() &&
5207 (Inst.getNumOperands() == 0 || isa<Constant>(Inst.getOperand(0))))
5211 Inst.replaceAllUsesWith(
C);
5214 Inst.eraseFromParent();
5220 for (
Use &U : Inst.operands()) {
5221 if (!isa<ConstantVector>(U) && !isa<ConstantExpr>(U))
5224 auto *
C = cast<Constant>(U);
5225 Constant *&FoldRes = FoldedConstants[
C];
5231 <<
"\n Old = " << *
C
5232 <<
"\n New = " << *FoldRes <<
'\n');
5241 if (!Inst.isDebugOrPseudoInst()) {
5242 InstrsForInstructionWorklist.
push_back(&Inst);
5243 SeenAliasScopes.
analyse(&Inst);
5251 if (isa<UndefValue>(BI->getCondition())) {
5253 HandleOnlyLiveSuccessor(BB,
nullptr);
5256 if (
auto *
Cond = dyn_cast<ConstantInt>(BI->getCondition())) {
5257 bool CondVal =
Cond->getZExtValue();
5258 HandleOnlyLiveSuccessor(BB, BI->getSuccessor(!CondVal));
5261 }
else if (
SwitchInst *SI = dyn_cast<SwitchInst>(TI)) {
5262 if (isa<UndefValue>(SI->getCondition())) {
5264 HandleOnlyLiveSuccessor(BB,
nullptr);
5267 if (
auto *
Cond = dyn_cast<ConstantInt>(SI->getCondition())) {
5268 HandleOnlyLiveSuccessor(BB,
5269 SI->findCaseValue(
Cond)->getCaseSuccessor());
5279 if (LiveBlocks.
count(&BB))
5282 unsigned NumDeadInstInBB;
5283 unsigned NumDeadDbgInstInBB;
5284 std::tie(NumDeadInstInBB, NumDeadDbgInstInBB) =
5287 MadeIRChange |= NumDeadInstInBB + NumDeadDbgInstInBB > 0;
5288 NumDeadInst += NumDeadInstInBB;
5305 Inst->eraseFromParent();
5322 auto &
DL =
F.getParent()->getDataLayout();
5330 if (
auto *Assume = dyn_cast<AssumeInst>(
I))
5338 bool MadeIRChange =
false;
5343 unsigned Iteration = 0;
5349 <<
" on " <<
F.getName()
5350 <<
" reached; stopping without verifying fixpoint\n");
5354 ++NumWorklistIterations;
5355 LLVM_DEBUG(
dbgs() <<
"\n\nINSTCOMBINE ITERATION #" << Iteration <<
" on "
5356 <<
F.getName() <<
"\n");
5359 ORE, BFI, BPI, PSI,
DL, LI);
5362 MadeChangeInThisIteration |= IC.
run();
5363 if (!MadeChangeInThisIteration)
5366 MadeIRChange =
true;
5369 "Instruction Combining did not reach a fixpoint after " +
5377 else if (Iteration == 2)
5379 else if (Iteration == 3)
5380 ++NumThreeIterations;
5382 ++NumFourOrMoreIterations;
5384 return MadeIRChange;
5392 OS, MapClassName2PassName);
5395 OS << (Options.
UseLoopInfo ?
"" :
"no-") <<
"use-loop-info;";
5418 auto *BFI = (PSI && PSI->hasProfileSummary()) ?
5423 BFI, BPI, PSI, LI, Options))
5454 auto AA = &getAnalysis<AAResultsWrapperPass>().getAAResults();
5455 auto &AC = getAnalysis<AssumptionCacheTracker>().getAssumptionCache(
F);
5456 auto &TLI = getAnalysis<TargetLibraryInfoWrapperPass>().getTLI(
F);
5457 auto &
TTI = getAnalysis<TargetTransformInfoWrapperPass>().getTTI(
F);
5458 auto &DT = getAnalysis<DominatorTreeWrapperPass>().getDomTree();
5459 auto &ORE = getAnalysis<OptimizationRemarkEmitterWrapperPass>().getORE();
5462 auto *LIWP = getAnalysisIfAvailable<LoopInfoWrapperPass>();
5463 auto *LI = LIWP ? &LIWP->getLoopInfo() :
nullptr;
5465 &getAnalysis<ProfileSummaryInfoWrapperPass>().getPSI();
5468 &getAnalysis<LazyBlockFrequencyInfoPass>().getBFI() :
5471 if (
auto *WrapperPass =
5472 getAnalysisIfAvailable<BranchProbabilityInfoWrapperPass>())
5473 BPI = &WrapperPass->getBPI();
5487 "Combine redundant instructions",
false,
false)
MachineBasicBlock MachineBasicBlock::iterator DebugLoc DL
amdgpu AMDGPU Register Bank Select
This file implements a class to represent arbitrary precision integral constant values and operations...
Expand Atomic instructions
static const Function * getParent(const Value *V)
This is the interface for LLVM's primary stateless and local alias analysis.
BlockVerifier::State From
static GCRegistry::Add< OcamlGC > B("ocaml", "ocaml 3.10-compatible GC")
static GCRegistry::Add< ErlangGC > A("erlang", "erlang-compatible garbage collector")
static GCRegistry::Add< StatepointGC > D("statepoint-example", "an example strategy for statepoint")
This file contains the declarations for the subclasses of Constant, which represent the different fla...
Returns the sub type a function will return at a given Idx Should correspond to the result type of an ExtractValue instruction executed with just that one unsigned Idx
This file provides an implementation of debug counters.
#define DEBUG_COUNTER(VARNAME, COUNTERNAME, DESC)
This file defines the DenseMap class.
static GCMetadataPrinterRegistry::Add< ErlangGCPrinter > X("erlang", "erlang-compatible garbage collector")
static bool isSigned(unsigned int Opcode)
This is the interface for a simple mod/ref and alias analysis over globals.
This file provides various utilities for inspecting and working with the control flow graph in LLVM I...
iv Induction Variable Users
This file provides internal interfaces used to implement the InstCombine.
This file provides the primary interface to the instcombine pass.
static Value * simplifySwitchOnSelectUsingRanges(SwitchInst &SI, SelectInst *Select, bool IsTrueArm)
static bool isUsedWithinShuffleVector(Value *V)
static bool isNeverEqualToUnescapedAlloc(Value *V, const TargetLibraryInfo &TLI, Instruction *AI)
static bool combineInstructionsOverFunction(Function &F, InstructionWorklist &Worklist, AliasAnalysis *AA, AssumptionCache &AC, TargetLibraryInfo &TLI, TargetTransformInfo &TTI, DominatorTree &DT, OptimizationRemarkEmitter &ORE, BlockFrequencyInfo *BFI, BranchProbabilityInfo *BPI, ProfileSummaryInfo *PSI, LoopInfo *LI, const InstCombineOptions &Opts)
static bool shorter_filter(const Value *LHS, const Value *RHS)
static Instruction * foldSelectGEP(GetElementPtrInst &GEP, InstCombiner::BuilderTy &Builder)
Thread a GEP operation with constant indices through the constant true/false arms of a select.
static bool shouldMergeGEPs(GEPOperator &GEP, GEPOperator &Src)
static cl::opt< unsigned > MaxArraySize("instcombine-maxarray-size", cl::init(1024), cl::desc("Maximum array size considered when doing a combine"))
static cl::opt< unsigned > ShouldLowerDbgDeclare("instcombine-lower-dbg-declare", cl::Hidden, cl::init(true))
static bool hasNoSignedWrap(BinaryOperator &I)
static bool simplifyAssocCastAssoc(BinaryOperator *BinOp1, InstCombinerImpl &IC)
Combine constant operands of associative operations either before or after a cast to eliminate one of...
static Value * simplifyInstructionWithPHI(Instruction &I, PHINode *PN, Value *InValue, BasicBlock *InBB, const DataLayout &DL, const SimplifyQuery SQ)
static void ClearSubclassDataAfterReassociation(BinaryOperator &I)
Conservatively clears subclassOptionalData after a reassociation or commutation.
static bool isAllocSiteRemovable(Instruction *AI, SmallVectorImpl< WeakTrackingVH > &Users, const TargetLibraryInfo &TLI)
static Value * getIdentityValue(Instruction::BinaryOps Opcode, Value *V)
This function returns identity value for given opcode, which can be used to factor patterns like (X *...
static bool leftDistributesOverRight(Instruction::BinaryOps LOp, Instruction::BinaryOps ROp)
Return whether "X LOp (Y ROp Z)" is always equal to "(X LOp Y) ROp (X LOp Z)".
static std::optional< std::pair< Value *, Value * > > matchSymmetricPhiNodesPair(PHINode *LHS, PHINode *RHS)
static Value * foldOperationIntoSelectOperand(Instruction &I, SelectInst *SI, Value *NewOp, InstCombiner &IC)
static Instruction * canonicalizeGEPOfConstGEPI8(GetElementPtrInst &GEP, GEPOperator *Src, InstCombinerImpl &IC)
static Instruction * tryToMoveFreeBeforeNullTest(CallInst &FI, const DataLayout &DL)
Move the call to free before a NULL test.
static bool rightDistributesOverLeft(Instruction::BinaryOps LOp, Instruction::BinaryOps ROp)
Return whether "(X LOp Y) ROp Z" is always equal to "(X ROp Z) LOp (Y ROp Z)".
static Value * tryFactorization(BinaryOperator &I, const SimplifyQuery &SQ, InstCombiner::BuilderTy &Builder, Instruction::BinaryOps InnerOpcode, Value *A, Value *B, Value *C, Value *D)
This tries to simplify binary operations by factorizing out common terms (e.
static bool isRemovableWrite(CallBase &CB, Value *UsedV, const TargetLibraryInfo &TLI)
Given a call CB which uses an address UsedV, return true if we can prove the call's only possible eff...
static Instruction::BinaryOps getBinOpsForFactorization(Instruction::BinaryOps TopOpcode, BinaryOperator *Op, Value *&LHS, Value *&RHS, BinaryOperator *OtherOp)
This function predicates factorization using distributive laws.
static bool hasNoUnsignedWrap(BinaryOperator &I)
static bool SoleWriteToDeadLocal(Instruction *I, TargetLibraryInfo &TLI)
Check for case where the call writes to an otherwise dead alloca.
static cl::opt< unsigned > MaxSinkNumUsers("instcombine-max-sink-users", cl::init(32), cl::desc("Maximum number of undroppable users for instruction sinking"))
static Constant * constantFoldOperationIntoSelectOperand(Instruction &I, SelectInst *SI, bool IsTrueArm)
static bool isCatchAll(EHPersonality Personality, Constant *TypeInfo)
Return 'true' if the given typeinfo will match anything.
static bool isMergedGEPInBounds(GEPOperator &GEP1, GEPOperator &GEP2)
static cl::opt< bool > EnableCodeSinking("instcombine-code-sinking", cl::desc("Enable code sinking"), cl::init(true))
static bool maintainNoSignedWrap(BinaryOperator &I, Value *B, Value *C)
static GCMetadataPrinterRegistry::Add< OcamlGCMetadataPrinter > Y("ocaml", "ocaml 3.10-compatible collector")
static bool IsSelect(MachineInstr &MI)
This header defines various interfaces for pass management in LLVM.
#define INITIALIZE_PASS_DEPENDENCY(depName)
#define INITIALIZE_PASS_END(passName, arg, name, cfg, analysis)
#define INITIALIZE_PASS_BEGIN(passName, arg, name, cfg, analysis)
const SmallVectorImpl< MachineOperand > & Cond
assert(ImpDefSCC.getReg()==AMDGPU::SCC &&ImpDefSCC.isDef())
This file defines the SmallPtrSet class.
This file defines the SmallVector class.
This file defines the 'Statistic' class, which is designed to be an easy way to expose various metric...
#define STATISTIC(VARNAME, DESC)
static SymbolRef::Type getType(const Symbol *Sym)
This defines the Use class.
static std::optional< unsigned > getOpcode(ArrayRef< VPValue * > Values)
Returns the opcode of Values or ~0 if they do not all agree.
static const uint32_t IV[8]
bool isNoAliasScopeDeclDead(Instruction *Inst)
void analyse(Instruction *I)
A manager for alias analyses.
A wrapper pass to provide the legacy pass manager access to a suitably prepared AAResults object.
Class for arbitrary precision integers.
static APInt getAllOnes(unsigned numBits)
Return an APInt of a specified width with all bits set.
bool isMinSignedValue() const
Determine if this is the smallest signed value.
APInt trunc(unsigned width) const
Truncate to new width.
bool isZero() const
Determine if this value is zero, i.e. all bits are clear.
unsigned getBitWidth() const
Return the number of bits in the APInt.
APInt sadd_ov(const APInt &RHS, bool &Overflow) const
APInt ashr(unsigned ShiftAmt) const
Arithmetic right-shift function.
bool isNonNegative() const
Determine if this APInt Value is non-negative (>= 0)
bool ule(const APInt &RHS) const
Unsigned less or equal comparison.
bool isPowerOf2() const
Check if this APInt's value is a power of two greater than zero.
static APInt getLowBitsSet(unsigned numBits, unsigned loBitsSet)
Constructs an APInt value that has the bottom loBitsSet bits set.
APInt ssub_ov(const APInt &RHS, bool &Overflow) const
APInt lshr(unsigned shiftAmt) const
Logical right-shift function.
A container for analyses that lazily runs them and caches their results.
PassT::Result * getCachedResult(IRUnitT &IR) const
Get the cached result of an analysis pass for a given IR unit.
PassT::Result & getResult(IRUnitT &IR, ExtraArgTs... ExtraArgs)
Get the result of an analysis pass for a given IR unit.
Represent the analysis usage information of a pass.
AnalysisUsage & addRequired()
AnalysisUsage & addPreserved()
Add the specified Pass class to the set of analyses preserved by this pass.
void setPreservesCFG()
This function should be called by the pass, iff they do not:
ArrayRef - Represent a constant reference to an array (0 or more elements consecutively in memory),...
size_t size() const
size - Get the array size.
Class to represent array types.
uint64_t getNumElements() const
static ArrayType * get(Type *ElementType, uint64_t NumElements)
This static method is the primary way to construct an ArrayType.
Type * getElementType() const
A function analysis which provides an AssumptionCache.
An immutable pass that tracks lazily created AssumptionCache objects.
A cache of @llvm.assume calls within a function.
void registerAssumption(AssumeInst *CI)
Add an @llvm.assume intrinsic to this function's cache.
uint64_t getDereferenceableBytes() const
Returns the number of dereferenceable bytes from the dereferenceable attribute.
bool isValid() const
Return true if the attribute is any kind of attribute.
Legacy wrapper pass to provide the BasicAAResult object.
LLVM Basic Block Representation.
iterator begin()
Instruction iterator methods.
iterator_range< const_phi_iterator > phis() const
Returns a range that iterates over the phis in the basic block.
const_iterator getFirstInsertionPt() const
Returns an iterator to the first instruction in this block that is suitable for inserting a non-PHI i...
iterator_range< filter_iterator< BasicBlock::const_iterator, std::function< bool(const Instruction &)> > > instructionsWithoutDebug(bool SkipPseudoOp=true) const
Return a const iterator range over the instructions in the block, skipping any debug instructions.
InstListType::const_iterator getFirstNonPHIIt() const
Iterator returning form of getFirstNonPHI.
const Instruction & front() const
bool isEntryBlock() const
Return true if this is the entry block of the containing function.
const BasicBlock * getSinglePredecessor() const
Return the predecessor of this block if it has a single predecessor block.
const BasicBlock * getUniquePredecessor() const
Return the predecessor of this block if it has a unique predecessor block.
const Function * getParent() const
Return the enclosing method, or null if none.
InstListType::iterator iterator
Instruction iterators...
const_iterator getFirstNonPHIOrDbgOrAlloca() const
Returns an iterator to the first instruction in this block that is not a PHINode, a debug intrinsic,...
const Instruction * getTerminator() const LLVM_READONLY
Returns the terminator instruction if the block is well formed or null if the block is not well forme...
static BinaryOperator * Create(BinaryOps Op, Value *S1, Value *S2, const Twine &Name, BasicBlock::iterator InsertBefore)
Construct a binary instruction, given the opcode and the two operands.
BinaryOps getOpcode() const
static BinaryOperator * CreateNeg(Value *Op, const Twine &Name, BasicBlock::iterator InsertBefore)
Helper functions to construct and inspect unary operations (NEG and NOT) via binary operators SUB and...
static BinaryOperator * CreateNUW(BinaryOps Opc, Value *V1, Value *V2, const Twine &Name="")
Analysis pass which computes BlockFrequencyInfo.
BlockFrequencyInfo pass uses BlockFrequencyInfoImpl implementation to estimate IR basic block frequen...
Conditional or Unconditional Branch instruction.
void swapSuccessors()
Swap the successors of this branch instruction.
bool isConditional() const
BasicBlock * getSuccessor(unsigned i) const
bool isUnconditional() const
Value * getCondition() const
Analysis pass which computes BranchProbabilityInfo.
Analysis providing branch probability information.
void swapSuccEdgesProbabilities(const BasicBlock *Src)
Swap outgoing edges probabilities for Src with branch terminator.
Represents analyses that only rely on functions' control flow.
Base class for all callable instructions (InvokeInst and CallInst) Holds everything related to callin...
Function * getCalledFunction() const
Returns the function called, or null if this is an indirect function invocation or the function signa...
void setAttributes(AttributeList A)
Set the parameter attributes for this call.
bool doesNotThrow() const
Determine if the call cannot unwind.
Value * getArgOperand(unsigned i) const
AttributeList getAttributes() const
Return the parameter attributes for this call.
This class represents a function call, abstracting a target machine's calling convention.
static CallInst * Create(FunctionType *Ty, Value *F, const Twine &NameStr, BasicBlock::iterator InsertBefore)
static CastInst * Create(Instruction::CastOps, Value *S, Type *Ty, const Twine &Name, BasicBlock::iterator InsertBefore)
Provides a way to construct any of the CastInst subclasses using an opcode instead of the subclass's ...
Predicate
This enumeration lists the possible predicates for CmpInst subclasses.
@ ICMP_UGT
unsigned greater than
@ ICMP_ULT
unsigned less than
Predicate getSwappedPredicate() const
For example, EQ->EQ, SLE->SGE, ULT->UGT, OEQ->OEQ, ULE->UGE, OLT->OGT, etc.
Predicate getInversePredicate() const
For example, EQ -> NE, UGT -> ULE, SLT -> SGE, OEQ -> UNE, UGT -> OLE, OLT -> UGE,...
Predicate getPredicate() const
Return the predicate for this instruction.
ConstantArray - Constant Array Declarations.
static Constant * get(ArrayType *T, ArrayRef< Constant * > V)
A vector constant whose element type is a simple 1/2/4/8-byte integer or float/double,...
static Constant * getSub(Constant *C1, Constant *C2, bool HasNUW=false, bool HasNSW=false)
static Constant * getNot(Constant *C)
static Constant * getICmp(unsigned short pred, Constant *LHS, Constant *RHS, bool OnlyIfReduced=false)
get* - Return some common constants without having to specify the full Instruction::OPCODE identifier...
static Constant * getShl(Constant *C1, Constant *C2, bool HasNUW=false, bool HasNSW=false)
static Constant * getAdd(Constant *C1, Constant *C2, bool HasNUW=false, bool HasNSW=false)
static Constant * getBinOpIdentity(unsigned Opcode, Type *Ty, bool AllowRHSConstant=false, bool NSZ=false)
Return the identity constant for a binary opcode.
static Constant * getNeg(Constant *C, bool HasNSW=false)
This is the shared class of boolean and integer constants.
static ConstantInt * getTrue(LLVMContext &Context)
static ConstantInt * getFalse(LLVMContext &Context)
static ConstantInt * getBool(LLVMContext &Context, bool V)
This class represents a range of values.
bool getEquivalentICmp(CmpInst::Predicate &Pred, APInt &RHS) const
Set up Pred and RHS such that ConstantRange::makeExactICmpRegion(Pred, RHS) == *this.
static ConstantRange makeExactICmpRegion(CmpInst::Predicate Pred, const APInt &Other)
Produce the exact range such that all values in the returned range satisfy the given predicate with a...
bool contains(const APInt &Val) const
Return true if the specified value is in the set.
static ConstantRange makeExactNoWrapRegion(Instruction::BinaryOps BinOp, const APInt &Other, unsigned NoWrapKind)
Produce the range that contains X if and only if "X BinOp Other" does not wrap.
Constant Vector Declarations.
static Constant * get(ArrayRef< Constant * > V)
This is an important base class in LLVM.
static Constant * getIntegerValue(Type *Ty, const APInt &V)
Return the value for an integer or pointer constant, or a vector thereof, with the given scalar value...
static Constant * replaceUndefsWith(Constant *C, Constant *Replacement)
Try to replace undefined constant C or undefined elements in C with Replacement.
static Constant * getAllOnesValue(Type *Ty)
const Constant * stripPointerCasts() const
static Constant * getNullValue(Type *Ty)
Constructor to create a '0' constant of arbitrary type.
Constant * getAggregateElement(unsigned Elt) const
For aggregates (struct/array/vector) return the constant that corresponds to the specified element if...
bool isNullValue() const
Return true if this is the value that would be returned by getNullValue.
This class represents an Operation in the Expression.
A parsed version of the target data layout string in and methods for querying it.
SmallVector< APInt > getGEPIndicesForOffset(Type *&ElemTy, APInt &Offset) const
Get GEP indices to access Offset inside ElemTy.
bool isLegalInteger(uint64_t Width) const
Returns true if the specified type is known to be a native integer type supported by the CPU.
unsigned getIndexTypeSizeInBits(Type *Ty) const
Layout size of the index used in GEP calculation.
IntegerType * getIndexType(LLVMContext &C, unsigned AddressSpace) const
Returns the type of a GEP index in AddressSpace.
TypeSize getTypeAllocSize(Type *Ty) const
Returns the offset in bytes between successive objects of the specified type, including alignment pad...
unsigned getIndexSizeInBits(unsigned AS) const
Size in bits of index used for address calculation in getelementptr.
TypeSize getTypeSizeInBits(Type *Ty) const
Size examples:
int64_t getIndexedOffsetInType(Type *ElemTy, ArrayRef< Value * > Indices) const
Returns the offset from the beginning of the type for the specified indices.
This is the common base class for debug info intrinsics for variables.
Record of a variable value-assignment, aka a non instruction representation of the dbg....
static bool shouldExecute(unsigned CounterName)
Identifies a unique instance of a variable.
iterator find(const_arg_type_t< KeyT > Val)
void registerBranch(BranchInst *BI)
Add a branch condition to the cache.
Analysis pass which computes a DominatorTree.
Legacy analysis pass which computes a DominatorTree.
Concrete subclass of DominatorTreeBase that is used to compute a normal dominator tree.
bool isReachableFromEntry(const Use &U) const
Provide an overload for a Use.
bool dominates(const BasicBlock *BB, const Use &U) const
Return true if the (end of the) basic block BB dominates the use U.
Utility class for floating point operations which can have information about relaxed accuracy require...
Convenience struct for specifying and reasoning about fast-math flags.
This class represents a freeze function that returns random concrete value if an operand is either a ...
FunctionPass class - This class is used to implement most global optimizations.
bool skipFunction(const Function &F) const
Optional passes call this function to check whether the pass should be skipped.
const BasicBlock & getEntryBlock() const
static bool isTargetIntrinsic(Intrinsic::ID IID)
isTargetIntrinsic - Returns true if IID is an intrinsic specific to a certain target.
bool isInBounds() const
Test whether this is an inbounds GEP, as defined by LangRef.html.
bool hasAllZeroIndices() const
Return true if all of the indices of this GEP are zeros.
an instruction for type-safe pointer arithmetic to access elements of arrays and structs
static Type * getTypeAtIndex(Type *Ty, Value *Idx)
Return the type of the element at the given index of an indexable type.
static GetElementPtrInst * Create(Type *PointeeType, Value *Ptr, ArrayRef< Value * > IdxList, const Twine &NameStr, BasicBlock::iterator InsertBefore)
static GetElementPtrInst * CreateInBounds(Type *PointeeType, Value *Ptr, ArrayRef< Value * > IdxList, const Twine &NameStr, BasicBlock::iterator InsertBefore)
Create an "inbounds" getelementptr.
void setIsInBounds(bool b=true)
Set or clear the inbounds flag on this GEP instruction.
Legacy wrapper pass to provide the GlobalsAAResult object.
This instruction compares its operands according to the predicate given to the constructor.
static bool isEquality(Predicate P)
Return true if this predicate is either EQ or NE.
Value * CreateBinaryIntrinsic(Intrinsic::ID ID, Value *LHS, Value *RHS, Instruction *FMFSource=nullptr, const Twine &Name="")
Create a call to intrinsic ID with 2 operands which is mangled on the first type.
Value * CreatePtrAdd(Value *Ptr, Value *Offset, const Twine &Name="", bool IsInBounds=false)
Value * CreateLogicalOp(Instruction::BinaryOps Opc, Value *Cond1, Value *Cond2, const Twine &Name="")
Value * CreateExtractValue(Value *Agg, ArrayRef< unsigned > Idxs, const Twine &Name="")
CallInst * CreateIntrinsic(Intrinsic::ID ID, ArrayRef< Type * > Types, ArrayRef< Value * > Args, Instruction *FMFSource=nullptr, const Twine &Name="")
Create a call to intrinsic ID with Args, mangled using Types.
Value * CreateSelect(Value *C, Value *True, Value *False, const Twine &Name="", Instruction *MDFrom=nullptr)
Value * CreateSExt(Value *V, Type *DestTy, const Twine &Name="")
Value * CreateFreeze(Value *V, const Twine &Name="")
void setFastMathFlags(FastMathFlags NewFMF)
Set the fast-math flags to be used with generated fp-math operators.
Value * CreateInBoundsGEP(Type *Ty, Value *Ptr, ArrayRef< Value * > IdxList, const Twine &Name="")
void CollectMetadataToCopy(Instruction *Src, ArrayRef< unsigned > MetadataKinds)
Collect metadata with IDs MetadataKinds from Src which should be added to all created instructions.
ConstantInt * getInt32(uint32_t C)
Get a constant 32-bit value.
Value * CreateCmp(CmpInst::Predicate Pred, Value *LHS, Value *RHS, const Twine &Name="", MDNode *FPMathTag=nullptr)
PHINode * CreatePHI(Type *Ty, unsigned NumReservedValues, const Twine &Name="")
Value * CreateNot(Value *V, const Twine &Name="")
Value * CreateSub(Value *LHS, Value *RHS, const Twine &Name="", bool HasNUW=false, bool HasNSW=false)
LoadInst * CreateLoad(Type *Ty, Value *Ptr, const char *Name)
Provided to resolve 'CreateLoad(Ty, Ptr, "...")' correctly, instead of converting the string to 'bool...
Value * CreateShuffleVector(Value *V1, Value *V2, Value *Mask, const Twine &Name="")
Value * CreateAnd(Value *LHS, Value *RHS, const Twine &Name="")
Value * CreateAdd(Value *LHS, Value *RHS, const Twine &Name="", bool HasNUW=false, bool HasNSW=false)
Value * CreateTrunc(Value *V, Type *DestTy, const Twine &Name="", bool IsNUW=false, bool IsNSW=false)
Value * CreateBinOp(Instruction::BinaryOps Opc, Value *LHS, Value *RHS, const Twine &Name="", MDNode *FPMathTag=nullptr)
Value * CreateIntCast(Value *V, Type *DestTy, bool isSigned, const Twine &Name="")
void SetInsertPoint(BasicBlock *TheBB)
This specifies that created instructions should be appended to the end of the specified block.
Value * CreateAShr(Value *LHS, Value *RHS, const Twine &Name="", bool isExact=false)
Value * CreateXor(Value *LHS, Value *RHS, const Twine &Name="")
Value * CreateGEP(Type *Ty, Value *Ptr, ArrayRef< Value * > IdxList, const Twine &Name="", bool IsInBounds=false)
Value * CreateICmp(CmpInst::Predicate P, Value *LHS, Value *RHS, const Twine &Name="")
Value * CreateLogicalOr(Value *Cond1, Value *Cond2, const Twine &Name="")
IntegerType * getInt8Ty()
Fetch the type representing an 8-bit integer.
ConstantInt * getInt(const APInt &AI)
Get a constant integer value.
Provides an 'InsertHelper' that calls a user-provided callback after performing the default insertion...
This instruction inserts a struct field of array element value into an aggregate value.
static InsertValueInst * Create(Value *Agg, Value *Val, ArrayRef< unsigned > Idxs, const Twine &NameStr, BasicBlock::iterator InsertBefore)
InstCombinePass(InstCombineOptions Opts={})
void printPipeline(raw_ostream &OS, function_ref< StringRef(StringRef)> MapClassName2PassName)
PreservedAnalyses run(Function &F, FunctionAnalysisManager &AM)
Instruction * FoldOpIntoSelect(Instruction &Op, SelectInst *SI, bool FoldWithMultiUse=false)
Given an instruction with a select as one operand and a constant as the other operand,...
Instruction * foldBinOpOfSelectAndCastOfSelectCondition(BinaryOperator &I)
Tries to simplify binops of select and cast of the select condition.
Instruction * foldBinOpIntoSelectOrPhi(BinaryOperator &I)
This is a convenience wrapper function for the above two functions.
bool SimplifyAssociativeOrCommutative(BinaryOperator &I)
Performs a few simplifications for operators which are associative or commutative.
Instruction * visitGEPOfGEP(GetElementPtrInst &GEP, GEPOperator *Src)
Value * foldUsingDistributiveLaws(BinaryOperator &I)
Tries to simplify binary operations which some other binary operation distributes over.
Instruction * foldBinOpShiftWithShift(BinaryOperator &I)
Instruction * visitUnreachableInst(UnreachableInst &I)
Instruction * foldOpIntoPhi(Instruction &I, PHINode *PN)
Given a binary operator, cast instruction, or select which has a PHI node as operand #0,...
void handleUnreachableFrom(Instruction *I, SmallVectorImpl< BasicBlock * > &Worklist)
Value * SimplifyDemandedVectorElts(Value *V, APInt DemandedElts, APInt &PoisonElts, unsigned Depth=0, bool AllowMultipleUsers=false) override
The specified value produces a vector with any number of elements.
Instruction * visitFreeze(FreezeInst &I)
void handlePotentiallyDeadBlocks(SmallVectorImpl< BasicBlock * > &Worklist)
Instruction * visitFree(CallInst &FI, Value *FreedOp)
Instruction * visitExtractValueInst(ExtractValueInst &EV)
void handlePotentiallyDeadSuccessors(BasicBlock *BB, BasicBlock *LiveSucc)
Instruction * visitUnconditionalBranchInst(BranchInst &BI)
Instruction * eraseInstFromFunction(Instruction &I) override
Combiner aware instruction erasure.
Instruction * visitLandingPadInst(LandingPadInst &LI)
bool prepareWorklist(Function &F, ReversePostOrderTraversal< BasicBlock * > &RPOT)
Perform early cleanup and prepare the InstCombine worklist.
Instruction * visitReturnInst(ReturnInst &RI)
Instruction * visitSwitchInst(SwitchInst &SI)
Instruction * foldBinopWithPhiOperands(BinaryOperator &BO)
For a binary operator with 2 phi operands, try to hoist the binary operation before the phi.
Constant * getLosslessTrunc(Constant *C, Type *TruncTy, unsigned ExtOp)
Value * SimplifyDemandedUseFPClass(Value *V, FPClassTest DemandedMask, KnownFPClass &Known, unsigned Depth, Instruction *CxtI)
Attempts to replace V with a simpler value based on the demanded floating-point classes.
bool mergeStoreIntoSuccessor(StoreInst &SI)
Try to transform: if () { *P = v1; } else { *P = v2 } or: *P = v1; if () { *P = v2; } into a phi node...
Instruction * tryFoldInstWithCtpopWithNot(Instruction *I)
void tryToSinkInstructionDbgValues(Instruction *I, BasicBlock::iterator InsertPos, BasicBlock *SrcBlock, BasicBlock *DestBlock, SmallVectorImpl< DbgVariableIntrinsic * > &DbgUsers)
void CreateNonTerminatorUnreachable(Instruction *InsertAt)
Create and insert the idiom we use to indicate a block is unreachable without having to rewrite the C...
Value * pushFreezeToPreventPoisonFromPropagating(FreezeInst &FI)
bool run()
Run the combiner over the entire worklist until it is empty.
Instruction * foldVectorBinop(BinaryOperator &Inst)
Canonicalize the position of binops relative to shufflevector.
bool removeInstructionsBeforeUnreachable(Instruction &I)
Value * SimplifySelectsFeedingBinaryOp(BinaryOperator &I, Value *LHS, Value *RHS)
void tryToSinkInstructionDbgVariableRecords(Instruction *I, BasicBlock::iterator InsertPos, BasicBlock *SrcBlock, BasicBlock *DestBlock, SmallVectorImpl< DbgVariableRecord * > &DPUsers)
void addDeadEdge(BasicBlock *From, BasicBlock *To, SmallVectorImpl< BasicBlock * > &Worklist)
Instruction * visitAllocSite(Instruction &FI)
Instruction * visitGetElementPtrInst(GetElementPtrInst &GEP)
Instruction * visitBranchInst(BranchInst &BI)
Value * tryFactorizationFolds(BinaryOperator &I)
This tries to simplify binary operations by factorizing out common terms (e.
Instruction * foldFreezeIntoRecurrence(FreezeInst &I, PHINode *PN)
bool tryToSinkInstruction(Instruction *I, BasicBlock *DestBlock)
Try to move the specified instruction from its current block into the beginning of DestBlock,...
bool freezeOtherUses(FreezeInst &FI)
void freelyInvertAllUsersOf(Value *V, Value *IgnoredUser=nullptr)
Freely adapt every user of V as-if V was changed to !V.
The core instruction combiner logic.
const DataLayout & getDataLayout() const
static bool isCanonicalPredicate(CmpInst::Predicate Pred)
Predicate canonicalization reduces the number of patterns that need to be matched by other transforms...
bool isFreeToInvert(Value *V, bool WillInvertAllUses, bool &DoesConsume)
Return true if the specified value is free to invert (apply ~ to).
static unsigned getComplexity(Value *V)
Assign a complexity or rank value to LLVM Values.
Instruction * InsertNewInstBefore(Instruction *New, BasicBlock::iterator Old)
Inserts an instruction New before instruction Old.
Instruction * replaceInstUsesWith(Instruction &I, Value *V)
A combiner-aware RAUW-like routine.
uint64_t MaxArraySizeForCombine
Maximum size of array considered when transforming.
static bool shouldAvoidAbsorbingNotIntoSelect(const SelectInst &SI)
void replaceUse(Use &U, Value *NewValue)
Replace use and add the previously used value to the worklist.
InstructionWorklist & Worklist
A worklist of the instructions that need to be simplified.
Instruction * InsertNewInstWith(Instruction *New, BasicBlock::iterator Old)
Same as InsertNewInstBefore, but also sets the debug loc.
BranchProbabilityInfo * BPI
unsigned ComputeNumSignBits(const Value *Op, unsigned Depth=0, const Instruction *CxtI=nullptr) const
std::optional< Instruction * > targetInstCombineIntrinsic(IntrinsicInst &II)
void addToWorklist(Instruction *I)
Value * getFreelyInvertedImpl(Value *V, bool WillInvertAllUses, BuilderTy *Builder, bool &DoesConsume, unsigned Depth)
Return nonnull value if V is free to invert under the condition of WillInvertAllUses.
std::optional< Value * > targetSimplifyDemandedVectorEltsIntrinsic(IntrinsicInst &II, APInt DemandedElts, APInt &UndefElts, APInt &UndefElts2, APInt &UndefElts3, std::function< void(Instruction *, unsigned, APInt, APInt &)> SimplifyAndSetOp)
Instruction * replaceOperand(Instruction &I, unsigned OpNum, Value *V)
Replace operand of instruction and add old operand to the worklist.
static Constant * getSafeVectorConstantForBinop(BinaryOperator::BinaryOps Opcode, Constant *In, bool IsRHSConstant)
Some binary operators require special handling to avoid poison and undefined behavior.
SmallDenseSet< std::pair< BasicBlock *, BasicBlock * >, 8 > DeadEdges
Edges that are known to never be taken.
std::optional< Value * > targetSimplifyDemandedUseBitsIntrinsic(IntrinsicInst &II, APInt DemandedMask, KnownBits &Known, bool &KnownBitsComputed)
void computeKnownBits(const Value *V, KnownBits &Known, unsigned Depth, const Instruction *CxtI) const
bool isValidAddrSpaceCast(unsigned FromAS, unsigned ToAS) const
Value * getFreelyInverted(Value *V, bool WillInvertAllUses, BuilderTy *Builder, bool &DoesConsume)
void visit(Iterator Start, Iterator End)
The legacy pass manager's instcombine pass.
InstructionCombiningPass()
void getAnalysisUsage(AnalysisUsage &AU) const override
getAnalysisUsage - This function should be overriden by passes that need analysis information to do t...
bool runOnFunction(Function &F) override
runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass.
InstructionWorklist - This is the worklist management logic for InstCombine and other simplification ...
Instruction * removeOne()
void pushUsersToWorkList(Instruction &I)
When an instruction is simplified, add all users of the instruction to the work lists because they mi...
void add(Instruction *I)
Add instruction to the worklist.
void push(Instruction *I)
Push the instruction onto the worklist stack.
Instruction * popDeferred()
void zap()
Check that the worklist is empty and nuke the backing store for the map.
void reserve(size_t Size)
static bool isBitwiseLogicOp(unsigned Opcode)
Determine if the Opcode is and/or/xor.
void copyIRFlags(const Value *V, bool IncludeWrapFlags=true)
Convenience method to copy supported exact, fast-math, and (optionally) wrapping flags from V to this...
const DebugLoc & getDebugLoc() const
Return the debug location for this node as a DebugLoc.
const Module * getModule() const
Return the module owning the function this instruction belongs to or nullptr it the function does not...
bool isAssociative() const LLVM_READONLY
Return true if the instruction is associative:
bool isCommutative() const LLVM_READONLY
Return true if the instruction is commutative:
void setFastMathFlags(FastMathFlags FMF)
Convenience function for setting multiple fast-math flags on this instruction, which must be an opera...
const BasicBlock * getParent() const
const Function * getFunction() const
Return the function this instruction belongs to.
bool isTerminator() const
void dropUBImplyingAttrsAndMetadata()
Drop any attributes or metadata that can cause immediate undefined behavior.
FastMathFlags getFastMathFlags() const LLVM_READONLY
Convenience function for getting all the fast-math flags, which must be an operator which supports th...
bool willReturn() const LLVM_READONLY
Return true if the instruction will return (unwinding is considered as a form of returning control fl...
unsigned getOpcode() const
Returns a member of one of the enums like Instruction::Add.
bool isBitwiseLogicOp() const
Return true if this is and/or/xor.
void dropPoisonGeneratingFlags()
Drops flags that may cause this instruction to evaluate to poison despite having non-poison inputs.
void setDebugLoc(DebugLoc Loc)
Set the debug location information for this instruction.
void moveBefore(Instruction *MovePos)
Unlink this instruction from its current basic block and insert it into the basic block that MovePos ...
Class to represent integer types.
static IntegerType * get(LLVMContext &C, unsigned NumBits)
This static method is the primary way of constructing an IntegerType.
A wrapper class for inspecting calls to intrinsic functions.
Intrinsic::ID getIntrinsicID() const
Return the intrinsic ID of this intrinsic.
static InvokeInst * Create(FunctionType *Ty, Value *Func, BasicBlock *IfNormal, BasicBlock *IfException, ArrayRef< Value * > Args, const Twine &NameStr, BasicBlock::iterator InsertBefore)
The landingpad instruction holds all of the information necessary to generate correct exception handl...
void addClause(Constant *ClauseVal)
Add a catch or filter clause to the landing pad.
void setCleanup(bool V)
Indicate that this landingpad instruction is a cleanup.
static LandingPadInst * Create(Type *RetTy, unsigned NumReservedClauses, const Twine &NameStr, BasicBlock::iterator InsertBefore)
Constructors - NumReservedClauses is a hint for the number of incoming clauses that this landingpad w...
This is an alternative analysis pass to BlockFrequencyInfoWrapperPass.
static void getLazyBFIAnalysisUsage(AnalysisUsage &AU)
Helper for client passes to set up the analysis usage on behalf of this pass.
An instruction for reading from memory.
Analysis pass that exposes the LoopInfo for a function.
const MDOperand & getOperand(unsigned I) const
unsigned getNumOperands() const
Return number of MDNode operands.
Tracking metadata reference owned by Metadata.
This is the common base class for memset/memcpy/memmove.
static MemoryLocation getForDest(const MemIntrinsic *MI)
Return a location representing the destination of a memory set or transfer.
This class represents min/max intrinsics.
static ICmpInst::Predicate getPredicate(Intrinsic::ID ID)
Returns the comparison predicate underlying the intrinsic.
A Module instance is used to store all the information related to an LLVM module.
MDNode * getScopeList() const
An analysis over an "inner" IR unit that provides access to an analysis manager over a "outer" IR uni...
Utility class for integer operators which may exhibit overflow - Add, Sub, Mul, and Shl.
bool hasNoSignedWrap() const
Test whether this operation is known to never undergo signed overflow, aka the nsw property.
bool hasNoUnsignedWrap() const
Test whether this operation is known to never undergo unsigned overflow, aka the nuw property.
void addIncoming(Value *V, BasicBlock *BB)
Add an incoming value to the end of the PHI list.
op_range incoming_values()
static PHINode * Create(Type *Ty, unsigned NumReservedValues, const Twine &NameStr, BasicBlock::iterator InsertBefore)
Constructors - NumReservedValues is a hint for the number of incoming edges that this phi node will h...
BasicBlock * getIncomingBlock(unsigned i) const
Return incoming basic block number i.
Value * getIncomingValue(unsigned i) const
Return incoming value number x.
unsigned getNumIncomingValues() const
Return the number of incoming edges.
PassRegistry - This class manages the registration and intitialization of the pass subsystem as appli...
static PassRegistry * getPassRegistry()
getPassRegistry - Access the global registry object, which is automatically initialized at applicatio...
In order to facilitate speculative execution, many instructions do not invoke immediate undefined beh...
static PoisonValue * get(Type *T)
Static factory methods - Return an 'poison' object of the specified type.
A set of analyses that are preserved following a run of a transformation pass.
static PreservedAnalyses all()
Construct a special preserved set that preserves all passes.
void preserveSet()
Mark an analysis set as preserved.
An analysis pass based on the new PM to deliver ProfileSummaryInfo.
An analysis pass based on legacy pass manager to deliver ProfileSummaryInfo.
Analysis providing profile information.
bool hasProfileSummary() const
Returns true if profile summary is available.
A global registry used in conjunction with static constructors to make pluggable components (like tar...
Return a value (possibly void), from a function.
Value * getReturnValue() const
Convenience accessor. Returns null if there is no return value.
static ReturnInst * Create(LLVMContext &C, Value *retVal, BasicBlock::iterator InsertBefore)
This class represents a cast from signed integer to floating point.
This class represents the LLVM 'select' instruction.
static SelectInst * Create(Value *C, Value *S1, Value *S2, const Twine &NameStr, BasicBlock::iterator InsertBefore, Instruction *MDFrom=nullptr)
This instruction constructs a fixed permutation of two input vectors.
size_type count(ConstPtrType Ptr) const
count - Return 1 if the specified pointer is in the set, 0 otherwise.
std::pair< iterator, bool > insert(PtrType Ptr)
Inserts Ptr if and only if there is no element in the container equal to Ptr.
bool contains(ConstPtrType Ptr) const
SmallPtrSet - This class implements a set which is optimized for holding SmallSize or less elements.
SmallSet - This maintains a set of unique values, optimizing for the case when the set is small (less...
std::pair< const_iterator, bool > insert(const T &V)
insert - Insert an element into the set if it isn't already there.
This class consists of common code factored out of the SmallVector class to reduce code duplication b...
reference emplace_back(ArgTypes &&... Args)
void reserve(size_type N)
iterator erase(const_iterator CI)
void append(ItTy in_start, ItTy in_end)
Add the specified range to the end of the SmallVector.
typename SuperClass::iterator iterator
void push_back(const T &Elt)
This is a 'vector' (really, a variable-sized array), optimized for the case when the array is small.
An instruction for storing to memory.
StringRef - Represent a constant reference to a string, i.e.
TargetFolder - Create constants with target dependent folding.
Analysis pass providing the TargetTransformInfo.
Analysis pass providing the TargetLibraryInfo.
Provides information about what library functions are available for the current target.
bool has(LibFunc F) const
Tests whether a library function is available.
bool getLibFunc(StringRef funcName, LibFunc &F) const
Searches for a particular function name.
Twine - A lightweight data structure for efficiently representing the concatenation of temporary valu...
The instances of the Type class are immutable: once they are created, they are never changed.
const fltSemantics & getFltSemantics() const
bool isVectorTy() const
True if this is an instance of VectorType.
static IntegerType * getInt1Ty(LLVMContext &C)
unsigned getPointerAddressSpace() const
Get the address space of this pointer or pointer vector type.
unsigned getScalarSizeInBits() const LLVM_READONLY
If this is a vector type, return the getPrimitiveSizeInBits value for the element type.
bool isStructTy() const
True if this is an instance of StructType.
bool isSized(SmallPtrSetImpl< Type * > *Visited=nullptr) const
Return true if it makes sense to take the size of this type.
bool isScalableTy() const
Return true if this is a type whose size is a known multiple of vscale.
static IntegerType * getInt32Ty(LLVMContext &C)
bool isIntegerTy() const
True if this is an instance of IntegerType.
TypeSize getPrimitiveSizeInBits() const LLVM_READONLY
Return the basic size of this type if it is a primitive type.
Type * getScalarType() const
If this is a vector type, return the element type, otherwise return 'this'.
This class represents a cast unsigned integer to floating point.
This function has undefined behavior.
A Use represents the edge between a Value definition and its users.
bool replaceUsesOfWith(Value *From, Value *To)
Replace uses of one Value with another.
Value * getOperand(unsigned i) const
LLVM Value Representation.
Type * getType() const
All values are typed, get the type of this value.
const Value * stripAndAccumulateInBoundsConstantOffsets(const DataLayout &DL, APInt &Offset) const
This is a wrapper around stripAndAccumulateConstantOffsets with the in-bounds requirement set to fals...
bool hasOneUse() const
Return true if there is exactly one use of this value.
iterator_range< user_iterator > users()
bool hasNUses(unsigned N) const
Return true if this Value has exactly N uses.
const Value * stripPointerCasts() const
Strip off pointer casts, all-zero GEPs and address space casts.
LLVMContext & getContext() const
All values hold a context through their type.
uint64_t getPointerDereferenceableBytes(const DataLayout &DL, bool &CanBeNull, bool &CanBeFreed) const
Returns the number of bytes known to be dereferenceable for the pointer value.
StringRef getName() const
Return a constant reference to the value's name.
void takeName(Value *V)
Transfer the name from V to this value.
static VectorType * get(Type *ElementType, ElementCount EC)
This static method is the primary way to construct an VectorType.
constexpr ScalarTy getFixedValue() const
constexpr bool isZero() const
An efficient, type-erasing, non-owning reference to a callable.
Type * getIndexedType() const
reverse_self_iterator getReverseIterator()
self_iterator getIterator()
This class implements an extremely fast bulk output stream that can only output to a stream.
A raw_ostream that writes to an std::string.
#define llvm_unreachable(msg)
Marks that the current location is not supposed to be reachable.
bool isNoFPClassCompatibleType(Type *Ty)
Returns true if this is a type legal for the 'nofpclass' attribute.
@ C
The default llvm calling convention, compatible with C.
Function * getDeclaration(Module *M, ID id, ArrayRef< Type * > Tys=std::nullopt)
Create or insert an LLVM Function declaration for an intrinsic, and return it.
cst_pred_ty< is_all_ones > m_AllOnes()
Match an integer or vector with all bits set.
class_match< PoisonValue > m_Poison()
Match an arbitrary poison constant.
BinaryOp_match< LHS, RHS, Instruction::And > m_And(const LHS &L, const RHS &R)
PtrAdd_match< PointerOpTy, OffsetOpTy > m_PtrAdd(const PointerOpTy &PointerOp, const OffsetOpTy &OffsetOp)
Matches GEP with i8 source element type.
BinaryOp_match< LHS, RHS, Instruction::Add > m_Add(const LHS &L, const RHS &R)
class_match< BinaryOperator > m_BinOp()
Match an arbitrary binary operation and ignore it.
BinaryOp_match< LHS, RHS, Instruction::AShr > m_AShr(const LHS &L, const RHS &R)
class_match< Constant > m_Constant()
Match an arbitrary Constant and ignore it.
BinaryOp_match< LHS, RHS, Instruction::Xor > m_Xor(const LHS &L, const RHS &R)
br_match m_UnconditionalBr(BasicBlock *&Succ)
specific_intval< false > m_SpecificInt(const APInt &V)
Match a specific integer value or vector with all elements equal to the value.
bool match(Val *V, const Pattern &P)
BinOpPred_match< LHS, RHS, is_idiv_op > m_IDiv(const LHS &L, const RHS &R)
Matches integer division operations.
bind_ty< Instruction > m_Instruction(Instruction *&I)
Match an instruction, capturing it if we match.
specificval_ty m_Specific(const Value *V)
Match if we have a specific specified value.
DisjointOr_match< LHS, RHS > m_DisjointOr(const LHS &L, const RHS &R)
constantexpr_match m_ConstantExpr()
Match a constant expression or a constant that contains a constant expression.
BinOpPred_match< LHS, RHS, is_right_shift_op > m_Shr(const LHS &L, const RHS &R)
Matches logical shift operations.
cst_pred_ty< is_nonnegative > m_NonNegative()
Match an integer or vector of non-negative values.
class_match< ConstantInt > m_ConstantInt()
Match an arbitrary ConstantInt and ignore it.
ThreeOps_match< Cond, LHS, RHS, Instruction::Select > m_Select(const Cond &C, const LHS &L, const RHS &R)
Matches SelectInst.
CmpClass_match< LHS, RHS, FCmpInst, FCmpInst::Predicate > m_FCmp(FCmpInst::Predicate &Pred, const LHS &L, const RHS &R)
CastOperator_match< OpTy, Instruction::Trunc > m_Trunc(const OpTy &Op)
Matches Trunc.
apint_match m_APIntAllowPoison(const APInt *&Res)
Match APInt while allowing poison in splat vector constants.
CmpClass_match< LHS, RHS, ICmpInst, ICmpInst::Predicate > m_ICmp(ICmpInst::Predicate &Pred, const LHS &L, const RHS &R)
OneUse_match< T > m_OneUse(const T &SubPattern)
auto m_LogicalOr()
Matches L || R where L and R are arbitrary values.
BinaryOp_match< cst_pred_ty< is_zero_int >, ValTy, Instruction::Sub > m_Neg(const ValTy &V)
Matches a 'Neg' as 'sub 0, V'.
TwoOps_match< V1_t, V2_t, Instruction::ShuffleVector > m_Shuffle(const V1_t &v1, const V2_t &v2)
Matches ShuffleVectorInst independently of mask value.
match_combine_and< class_match< Constant >, match_unless< constantexpr_match > > m_ImmConstant()
Match an arbitrary immediate Constant and ignore it.
CastInst_match< OpTy, ZExtInst > m_ZExt(const OpTy &Op)
Matches ZExt.
brc_match< Cond_t, bind_ty< BasicBlock >, bind_ty< BasicBlock > > m_Br(const Cond_t &C, BasicBlock *&T, BasicBlock *&F)
match_combine_or< BinaryOp_match< LHS, RHS, Instruction::Add >, DisjointOr_match< LHS, RHS > > m_AddLike(const LHS &L, const RHS &R)
Match either "add" or "or disjoint".
CastInst_match< OpTy, UIToFPInst > m_UIToFP(const OpTy &Op)
CastOperator_match< OpTy, Instruction::BitCast > m_BitCast(const OpTy &Op)
Matches BitCast.
match_combine_or< CastInst_match< OpTy, SExtInst >, NNegZExt_match< OpTy > > m_SExtLike(const OpTy &Op)
Match either "sext" or "zext nneg".
apint_match m_APInt(const APInt *&Res)
Match a ConstantInt or splatted ConstantVector, binding the specified pointer to the contained APInt.
class_match< Value > m_Value()
Match an arbitrary value and ignore it.
AnyBinaryOp_match< LHS, RHS, true > m_c_BinOp(const LHS &L, const RHS &R)
Matches a BinaryOperator with LHS and RHS in either order.
OverflowingBinaryOp_match< LHS, RHS, Instruction::Add, OverflowingBinaryOperator::NoSignedWrap > m_NSWAdd(const LHS &L, const RHS &R)
CastInst_match< OpTy, SIToFPInst > m_SIToFP(const OpTy &Op)
BinaryOp_match< LHS, RHS, Instruction::LShr > m_LShr(const LHS &L, const RHS &R)
match_combine_or< CastInst_match< OpTy, ZExtInst >, CastInst_match< OpTy, SExtInst > > m_ZExtOrSExt(const OpTy &Op)
Exact_match< T > m_Exact(const T &SubPattern)
BinOpPred_match< LHS, RHS, is_shift_op > m_Shift(const LHS &L, const RHS &R)
Matches shift operations.
BinaryOp_match< LHS, RHS, Instruction::Shl > m_Shl(const LHS &L, const RHS &R)
cstfp_pred_ty< is_non_zero_fp > m_NonZeroFP()
Match a floating-point non-zero.
m_Intrinsic_Ty< Opnd0 >::Ty m_VecReverse(const Opnd0 &Op0)
auto m_LogicalAnd()
Matches L && R where L and R are arbitrary values.
match_combine_or< match_combine_or< MaxMin_match< ICmpInst, LHS, RHS, smax_pred_ty >, MaxMin_match< ICmpInst, LHS, RHS, smin_pred_ty > >, match_combine_or< MaxMin_match< ICmpInst, LHS, RHS, umax_pred_ty >, MaxMin_match< ICmpInst, LHS, RHS, umin_pred_ty > > > m_MaxOrMin(const LHS &L, const RHS &R)
auto m_Undef()
Match an arbitrary undef constant.
BinaryOp_match< cst_pred_ty< is_all_ones >, ValTy, Instruction::Xor, true > m_Not(const ValTy &V)
Matches a 'Not' as 'xor V, -1' or 'xor -1, V'.
BinaryOp_match< LHS, RHS, Instruction::Or > m_Or(const LHS &L, const RHS &R)
CastInst_match< OpTy, SExtInst > m_SExt(const OpTy &Op)
Matches SExt.
is_zero m_Zero()
Match any null constant or a vector with all elements equal to 0.
CastOperator_match< OpTy, Instruction::PtrToInt > m_PtrToInt(const OpTy &Op)
Matches PtrToInt.
BinaryOp_match< LHS, RHS, Instruction::Sub > m_Sub(const LHS &L, const RHS &R)
match_combine_or< LTy, RTy > m_CombineOr(const LTy &L, const RTy &R)
Combine two pattern matchers matching L || R.
initializer< Ty > init(const Ty &Val)
This is an optimization pass for GlobalISel generic memory operations.
auto drop_begin(T &&RangeOrContainer, size_t N=1)
Return a range covering RangeOrContainer with the first N elements excluded.
Intrinsic::ID getInverseMinMaxIntrinsic(Intrinsic::ID MinMaxID)
detail::zippy< detail::zip_shortest, T, U, Args... > zip(T &&t, U &&u, Args &&...args)
zip iterator for two or more iteratable types.
void stable_sort(R &&Range)
bool all_of(R &&range, UnaryPredicate P)
Provide wrappers to std::all_of which take ranges instead of having to pass begin/end explicitly.
bool succ_empty(const Instruction *I)
Value * simplifyFreezeInst(Value *Op, const SimplifyQuery &Q)
Given an operand for a Freeze, see if we can fold the result.
FunctionPass * createInstructionCombiningPass()
std::pair< unsigned, unsigned > removeAllNonTerminatorAndEHPadInstructions(BasicBlock *BB)
Remove all instructions from a basic block other than its terminator and any present EH pad instructi...
auto enumerate(FirstRange &&First, RestRanges &&...Rest)
Given two or more input ranges, returns a new range whose values are are tuples (A,...
void salvageDebugInfoForDbgValues(Instruction &I, ArrayRef< DbgVariableIntrinsic * > Insns, ArrayRef< DbgVariableRecord * > DPInsns)
Implementation of salvageDebugInfo, applying only to instructions in Insns, rather than all debug use...
void findDbgUsers(SmallVectorImpl< DbgVariableIntrinsic * > &DbgInsts, Value *V, SmallVectorImpl< DbgVariableRecord * > *DbgVariableRecords=nullptr)
Finds the debug info intrinsics describing a value.
void salvageDebugInfo(const MachineRegisterInfo &MRI, MachineInstr &MI)
Assuming the instruction MI is going to be deleted, attempt to salvage debug users of MI by writing t...
auto successors(const MachineBasicBlock *BB)
bool isRemovableAlloc(const CallBase *V, const TargetLibraryInfo *TLI)
Return true if this is a call to an allocation function that does not have side effects that we are r...
std::optional< StringRef > getAllocationFamily(const Value *I, const TargetLibraryInfo *TLI)
If a function is part of an allocation family (e.g.
Value * lowerObjectSizeCall(IntrinsicInst *ObjectSize, const DataLayout &DL, const TargetLibraryInfo *TLI, bool MustSucceed)
Try to turn a call to @llvm.objectsize into an integer value of the given Type.
iterator_range< T > make_range(T x, T y)
Convenience function for iterating over sub-ranges.
Value * simplifyInstructionWithOperands(Instruction *I, ArrayRef< Value * > NewOps, const SimplifyQuery &Q)
Like simplifyInstruction but the operands of I are replaced with NewOps.
void append_range(Container &C, Range &&R)
Wrapper function to append range R to container C.
const Value * getUnderlyingObject(const Value *V, unsigned MaxLookup=6)
This method strips off any GEP address adjustments, pointer casts or llvm.threadlocal....
iterator_range< early_inc_iterator_impl< detail::IterOfRange< RangeT > > > make_early_inc_range(RangeT &&Range)
Make a range that does early increment to allow mutation of the underlying range without disrupting i...
gep_type_iterator gep_type_end(const User *GEP)
Value * getReallocatedOperand(const CallBase *CB)
If this is a call to a realloc function, return the reallocated operand.
bool isAllocLikeFn(const Value *V, const TargetLibraryInfo *TLI)
Tests if a value is a call or invoke to a library function that allocates memory (either malloc,...
bool handleUnreachableTerminator(Instruction *I, SmallVectorImpl< Value * > &PoisonedValues)
If a terminator in an unreachable basic block has an operand of type Instruction, transform it into p...
int countr_zero(T Val)
Count number of 0's from the least significant bit to the most stopping at the first 1.
Value * simplifyAddInst(Value *LHS, Value *RHS, bool IsNSW, bool IsNUW, const SimplifyQuery &Q)
Given operands for an Add, fold the result or return null.
Constant * ConstantFoldConstant(const Constant *C, const DataLayout &DL, const TargetLibraryInfo *TLI=nullptr)
ConstantFoldConstant - Fold the constant using the specified DataLayout.
constexpr bool has_single_bit(T Value) noexcept
bool isInstructionTriviallyDead(Instruction *I, const TargetLibraryInfo *TLI=nullptr)
Return true if the result produced by the instruction is not used, and the instruction will return.
bool isSplatValue(const Value *V, int Index=-1, unsigned Depth=0)
Return true if each element of the vector value V is poisoned or equal to every other non-poisoned el...
Value * emitGEPOffset(IRBuilderBase *Builder, const DataLayout &DL, User *GEP, bool NoAssumptions=false)
Given a getelementptr instruction/constantexpr, emit the code necessary to compute the offset from th...
constexpr unsigned MaxAnalysisRecursionDepth
auto reverse(ContainerTy &&C)
Constant * ConstantFoldInstOperands(Instruction *I, ArrayRef< Constant * > Ops, const DataLayout &DL, const TargetLibraryInfo *TLI=nullptr)
ConstantFoldInstOperands - Attempt to constant fold an instruction with the specified operands.
void sort(IteratorTy Start, IteratorTy End)
FPClassTest
Floating-point class tests, supported by 'is_fpclass' intrinsic.
bool LowerDbgDeclare(Function &F)
Lowers llvm.dbg.declare intrinsics into appropriate set of llvm.dbg.value intrinsics.
raw_ostream & dbgs()
dbgs() - This returns a reference to a raw_ostream for debugging messages.
void report_fatal_error(Error Err, bool gen_crash_diag=true)
Report a serious error, calling any installed error handler.
void ConvertDebugDeclareToDebugValue(DbgVariableIntrinsic *DII, StoreInst *SI, DIBuilder &Builder)
===------------------------------------------------------------------—===// Dbg Intrinsic utilities
Constant * ConstantFoldCastOperand(unsigned Opcode, Constant *C, Type *DestTy, const DataLayout &DL)
Attempt to constant fold a cast with the specified operand.
bool canCreateUndefOrPoison(const Operator *Op, bool ConsiderFlagsAndMetadata=true)
canCreateUndefOrPoison returns true if Op can create undef or poison from non-undef & non-poison oper...
EHPersonality classifyEHPersonality(const Value *Pers)
See if the given exception handling personality function is one that we understand.
Value * simplifyExtractValueInst(Value *Agg, ArrayRef< unsigned > Idxs, const SimplifyQuery &Q)
Given operands for an ExtractValueInst, fold the result or return null.
Constant * ConstantFoldBinaryOpOperands(unsigned Opcode, Constant *LHS, Constant *RHS, const DataLayout &DL)
Attempt to constant fold a binary operation with the specified operands.
bool replaceAllDbgUsesWith(Instruction &From, Value &To, Instruction &DomPoint, DominatorTree &DT)
Point debug users of From to To or salvage them.
bool isKnownNonZero(const Value *V, const SimplifyQuery &Q, unsigned Depth=0)
Return true if the given value is known to be non-zero when defined.
constexpr int PoisonMaskElem
auto drop_end(T &&RangeOrContainer, size_t N=1)
Return a range covering RangeOrContainer with the last N elements excluded.
Value * simplifyBinOp(unsigned Opcode, Value *LHS, Value *RHS, const SimplifyQuery &Q)
Given operands for a BinaryOperator, fold the result or return null.
@ Or
Bitwise or logical OR of integers.
DWARFExpression::Operation Op
Constant * ConstantFoldInstruction(Instruction *I, const DataLayout &DL, const TargetLibraryInfo *TLI=nullptr)
ConstantFoldInstruction - Try to constant fold the specified instruction.
bool isGuaranteedNotToBeUndefOrPoison(const Value *V, AssumptionCache *AC=nullptr, const Instruction *CtxI=nullptr, const DominatorTree *DT=nullptr, unsigned Depth=0)
Return true if this function can prove that V does not have undef bits and is never poison.
Value * getFreedOperand(const CallBase *CB, const TargetLibraryInfo *TLI)
If this if a call to a free function, return the freed operand.
bool isSafeToSpeculativelyExecute(const Instruction *I, const Instruction *CtxI=nullptr, AssumptionCache *AC=nullptr, const DominatorTree *DT=nullptr, const TargetLibraryInfo *TLI=nullptr)
Return true if the instruction does not have any effects besides calculating the result and does not ...
constexpr unsigned BitWidth
bool isGuaranteedToTransferExecutionToSuccessor(const Instruction *I)
Return true if this function can prove that the instruction I will always transfer execution to one o...
gep_type_iterator gep_type_begin(const User *GEP)
auto predecessors(const MachineBasicBlock *BB)
bool is_contained(R &&Range, const E &Element)
Returns true if Element is found in Range.
bool equal(L &&LRange, R &&RRange)
Wrapper function around std::equal to detect if pair-wise elements between two ranges are the same.
Value * simplifyGEPInst(Type *SrcTy, Value *Ptr, ArrayRef< Value * > Indices, bool InBounds, const SimplifyQuery &Q)
Given operands for a GetElementPtrInst, fold the result or return null.
static auto filterDbgVars(iterator_range< simple_ilist< DbgRecord >::iterator > R)
Filter the DbgRecord range to DbgVariableRecord types only and downcast.
void initializeInstCombine(PassRegistry &)
Initialize all passes linked into the InstCombine library.
void initializeInstructionCombiningPassPass(PassRegistry &)
std::optional< bool > isImpliedCondition(const Value *LHS, const Value *RHS, const DataLayout &DL, bool LHSIsTrue=true, unsigned Depth=0)
Return true if RHS is known to be implied true by LHS.
bool isPotentiallyReachable(const Instruction *From, const Instruction *To, const SmallPtrSetImpl< BasicBlock * > *ExclusionSet=nullptr, const DominatorTree *DT=nullptr, const LoopInfo *LI=nullptr)
Determine whether instruction 'To' is reachable from 'From', without passing through any blocks in Ex...
void swap(llvm::BitVector &LHS, llvm::BitVector &RHS)
Implement std::swap in terms of BitVector swap.
static unsigned int semanticsPrecision(const fltSemantics &)
unsigned countMinLeadingOnes() const
Returns the minimum number of leading one bits.
unsigned getBitWidth() const
Get the bit width of this value.
unsigned countMinLeadingZeros() const
Returns the minimum number of leading zero bits.
A CRTP mix-in to automatically provide informational APIs needed for passes.
SimplifyQuery getWithInstruction(const Instruction *I) const
SimplifyQuery getWithoutUndef() const