return true;
}
+/// \brief Return true if the specified node is a BUILD_VECTOR node of
+/// all ConstantFPSDNode or undef.
+bool ISD::isBuildVectorOfConstantFPSDNodes(const SDNode *N) {
+ if (N->getOpcode() != ISD::BUILD_VECTOR)
+ return false;
+
+ for (unsigned i = 0, e = N->getNumOperands(); i != e; ++i) {
+ SDValue Op = N->getOperand(i);
+ if (Op.getOpcode() == ISD::UNDEF)
+ continue;
+ if (!isa<ConstantFPSDNode>(Op))
+ return false;
+ }
+ return true;
+}
+
/// isScalarToVector - Return true if the specified node is a
/// ISD::SCALAR_TO_VECTOR node or a BUILD_VECTOR node where only the low
/// element is not an undef.
return true;
}
-ISD::NodeType ISD::getExtForLoadExtType(ISD::LoadExtType ExtType) {
+ISD::NodeType ISD::getExtForLoadExtType(bool IsFP, ISD::LoadExtType ExtType) {
switch (ExtType) {
case ISD::EXTLOAD:
- return ISD::ANY_EXTEND;
+ return IsFP ? ISD::FP_EXTEND : ISD::ANY_EXTEND;
case ISD::SEXTLOAD:
return ISD::SIGN_EXTEND;
case ISD::ZEXTLOAD:
// N2 to point at N1.
static void commuteShuffle(SDValue &N1, SDValue &N2, SmallVectorImpl<int> &M) {
std::swap(N1, N2);
- int NElts = M.size();
- for (int i = 0; i != NElts; ++i) {
- if (M[i] >= NElts)
- M[i] -= NElts;
- else if (M[i] >= 0)
- M[i] += NElts;
- }
+ ShuffleVectorSDNode::commuteMask(M);
}
SDValue SelectionDAG::getVectorShuffle(EVT VT, SDLoc dl, SDValue N1,
if (N1.getOpcode() == ISD::UNDEF)
commuteShuffle(N1, N2, MaskVec);
+ // If shuffling a splat, try to blend the splat instead. We do this here so
+ // that even when this arises during lowering we don't have to re-handle it.
+ auto BlendSplat = [&](BuildVectorSDNode *BV, int Offset) {
+ BitVector UndefElements;
+ SDValue Splat = BV->getSplatValue(&UndefElements);
+ if (!Splat)
+ return;
+
+ for (int i = 0; i < (int)NElts; ++i) {
+ if (MaskVec[i] < Offset || MaskVec[i] >= (Offset + (int)NElts))
+ continue;
+
+ // If this input comes from undef, mark it as such.
+ if (UndefElements[MaskVec[i] - Offset]) {
+ MaskVec[i] = -1;
+ continue;
+ }
+
+ // If we can blend a non-undef lane, use that instead.
+ if (!UndefElements[i])
+ MaskVec[i] = i + Offset;
+ }
+ };
+ if (auto *N1BV = dyn_cast<BuildVectorSDNode>(N1))
+ BlendSplat(N1BV, 0);
+ if (auto *N2BV = dyn_cast<BuildVectorSDNode>(N2))
+ BlendSplat(N2BV, NElts);
+
// Canonicalize all index into lhs, -> shuffle lhs, undef
// Canonicalize all index into rhs, -> shuffle rhs, undef
bool AllLHS = true, AllRHS = true;
return getUNDEF(VT);
// If Identity shuffle return that node.
- bool Identity = true;
+ bool Identity = true, AllSame = true;
for (unsigned i = 0; i != NElts; ++i) {
if (MaskVec[i] >= 0 && MaskVec[i] != (int)i) Identity = false;
+ if (MaskVec[i] != MaskVec[0]) AllSame = false;
}
if (Identity && NElts)
return N1;
if (Splat && Splat.getOpcode() == ISD::UNDEF)
return getUNDEF(VT);
+ bool SameNumElts =
+ V.getValueType().getVectorNumElements() == VT.getVectorNumElements();
+
// We only have a splat which can skip shuffles if there is a splatted
// value and no undef lanes rearranged by the shuffle.
if (Splat && UndefElements.none()) {
// Splat of <x, x, ..., x>, return <x, x, ..., x>, provided that the
// number of elements match or the value splatted is a zero constant.
- if (V.getValueType().getVectorNumElements() ==
- VT.getVectorNumElements())
+ if (SameNumElts)
return N1;
if (auto *C = dyn_cast<ConstantSDNode>(Splat))
if (C->isNullValue())
return N1;
}
+
+ // If the shuffle itself creates a splat, build the vector directly.
+ if (AllSame && SameNumElts) {
+ const SDValue &Splatted = BV->getOperand(MaskVec[0]);
+ SmallVector<SDValue, 8> Ops(NElts, Splatted);
+
+ EVT BuildVT = BV->getValueType(0);
+ SDValue NewBV = getNode(ISD::BUILD_VECTOR, dl, BuildVT, Ops);
+
+ // We may have jumped through bitcasts, so the type of the
+ // BUILD_VECTOR may not match the type of the shuffle.
+ if (BuildVT != VT)
+ NewBV = getNode(ISD::BITCAST, dl, VT, NewBV);
+ return NewBV;
+ }
}
}
SDValue SelectionDAG::getCommutedVectorShuffle(const ShuffleVectorSDNode &SV) {
MVT VT = SV.getSimpleValueType(0);
- unsigned NumElems = VT.getVectorNumElements();
- SmallVector<int, 8> MaskVec;
-
- for (unsigned i = 0; i != NumElems; ++i) {
- int Idx = SV.getMaskElt(i);
- if (Idx >= 0) {
- if (Idx < (int)NumElems)
- Idx += NumElems;
- else
- Idx -= NumElems;
- }
- MaskVec.push_back(Idx);
- }
+ SmallVector<int, 8> MaskVec(SV.getMask().begin(), SV.getMask().end());
+ ShuffleVectorSDNode::commuteMask(MaskVec);
SDValue Op0 = SV.getOperand(0);
SDValue Op1 = SV.getOperand(1);
KnownZero = APInt::getHighBitsSet(BitWidth, Leaders);
break;
}
+ case ISD::EXTRACT_ELEMENT: {
+ computeKnownBits(Op.getOperand(0), KnownZero, KnownOne, Depth+1);
+ const unsigned Index =
+ cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
+ const unsigned BitWidth = Op.getValueType().getSizeInBits();
+
+ // Remove low part of known bits mask
+ KnownZero = KnownZero.getHiBits(KnownZero.getBitWidth() - Index * BitWidth);
+ KnownOne = KnownOne.getHiBits(KnownOne.getBitWidth() - Index * BitWidth);
+
+ // Remove high part of known bit mask
+ KnownZero = KnownZero.trunc(BitWidth);
+ KnownOne = KnownOne.trunc(BitWidth);
+ break;
+ }
case ISD::FrameIndex:
case ISD::TargetFrameIndex:
if (unsigned Align = InferPtrAlignment(Op)) {
// FIXME: it's tricky to do anything useful for this, but it is an important
// case for targets like X86.
break;
+ case ISD::EXTRACT_ELEMENT: {
+ const int KnownSign = ComputeNumSignBits(Op.getOperand(0), Depth+1);
+ const int BitWidth = Op.getValueType().getSizeInBits();
+ const int Items =
+ Op.getOperand(0).getValueType().getSizeInBits() / BitWidth;
+
+ // Get reverse index (starting from 1), Op1 value indexes elements from
+ // little end. Sign starts at big end.
+ const int rIndex = Items - 1 -
+ cast<ConstantSDNode>(Op.getOperand(1))->getZExtValue();
+
+ // If the sign portion ends in our element the substraction gives correct
+ // result. Otherwise it gives either negative or > bitwidth result
+ return std::max(std::min(KnownSign - rIndex * BitWidth, BitWidth), 0);
+ }
}
// If we are looking at the loaded value of the SDNode.
}
}
- // Constant fold unary operations with a vector integer operand.
+ // Constant fold unary operations with a vector integer or float operand.
if (BuildVectorSDNode *BV = dyn_cast<BuildVectorSDNode>(Operand.getNode())) {
if (BV->isConstant()) {
switch (Opcode) {
// FIXME: Entirely reasonable to perform folding of other unary
// operations here as the need arises.
break;
+ case ISD::TRUNCATE:
+ // Constant build vector truncation can be done with the original scalar
+ // operands but with a new build vector with the truncated value type.
+ return getNode(ISD::BUILD_VECTOR, DL, VT, BV->ops());
+ case ISD::FNEG:
+ case ISD::FABS:
+ case ISD::FCEIL:
+ case ISD::FTRUNC:
+ case ISD::FFLOOR:
+ case ISD::FP_EXTEND:
case ISD::UINT_TO_FP:
case ISD::SINT_TO_FP: {
+ // Let the above scalar folding handle the folding of each element.
SmallVector<SDValue, 8> Ops;
for (int i = 0, e = VT.getVectorNumElements(); i != e; ++i) {
SDValue OpN = BV->getOperand(i);
- // Let the above scalar folding handle the conversion of each
- // element.
- OpN = getNode(ISD::SINT_TO_FP, DL, VT.getVectorElementType(),
- OpN);
+ OpN = getNode(Opcode, DL, VT.getVectorElementType(), OpN);
+ if (OpN.getOpcode() != ISD::UNDEF &&
+ OpN.getOpcode() != ISD::Constant &&
+ OpN.getOpcode() != ISD::ConstantFP)
+ break;
Ops.push_back(OpN);
}
- return getNode(ISD::BUILD_VECTOR, DL, VT, Ops);
+ if (Ops.size() == VT.getVectorNumElements())
+ return getNode(ISD::BUILD_VECTOR, DL, VT, Ops);
+ break;
}
}
}
SmallVector<SDValue, 16> Elts(N1.getNode()->op_begin(),
N1.getNode()->op_end());
Elts.append(N2.getNode()->op_begin(), N2.getNode()->op_end());
+
+ // BUILD_VECTOR requires all inputs to be of the same type, find the
+ // maximum type and extend them all.
+ EVT SVT = VT.getScalarType();
+ for (SDValue Op : Elts)
+ SVT = (SVT.bitsLT(Op.getValueType()) ? Op.getValueType() : SVT);
+ if (SVT.bitsGT(VT.getScalarType()))
+ for (SDValue &Op : Elts)
+ Op = TLI->isZExtFree(Op.getValueType(), SVT)
+ ? getZExtOrTrunc(Op, DL, SVT)
+ : getSExtOrTrunc(Op, DL, SVT);
+
return getNode(ISD::BUILD_VECTOR, DL, VT, Elts);
}
break;
CSEMap.InsertNode(N, IP);
} else {
-
N = GetBinarySDNode(Opcode, DL, VTs, N1, N2, nuw, nsw, exact);
}
const APFloat &V3 = N3CFP->getValueAPF();
APFloat::opStatus s =
V1.fusedMultiplyAdd(V2, V3, APFloat::rmNearestTiesToEven);
- if (s != APFloat::opInvalidOp)
+ if (!TLI->hasFloatingPointExceptions() || s != APFloat::opInvalidOp)
return getConstantFP(V1, VT);
}
break;
return DAG.getConstantFP(APFloat(DAG.EVTToAPFloatSemantics(VT), Val), VT);
}
- Value = DAG.getNode(ISD::ZERO_EXTEND, dl, VT, Value);
+ assert(Value.getValueType() == MVT::i8 && "memset with non-byte fill value?");
+ EVT IntVT = VT.getScalarType();
+ if (!IntVT.isInteger())
+ IntVT = EVT::getIntegerVT(*DAG.getContext(), IntVT.getSizeInBits());
+
+ Value = DAG.getNode(ISD::ZERO_EXTEND, dl, IntVT, Value);
if (NumBits > 8) {
// Use a multiplication with 0x010101... to extend the input to the
// required length.
APInt Magic = APInt::getSplat(NumBits, APInt(8, 0x01));
- Value = DAG.getNode(ISD::MUL, dl, VT, Value, DAG.getConstant(Magic, VT));
+ Value = DAG.getNode(ISD::MUL, dl, IntVT, Value,
+ DAG.getConstant(Magic, IntVT));
+ }
+
+ if (VT != Value.getValueType() && !VT.isInteger())
+ Value = DAG.getNode(ISD::BITCAST, dl, VT.getScalarType(), Value);
+ if (VT != Value.getValueType()) {
+ assert(VT.getVectorElementType() == Value.getValueType() &&
+ "value type should be one vector element here");
+ SmallVector<SDValue, 8> BVOps(VT.getVectorNumElements(), Value);
+ Value = DAG.getNode(ISD::BUILD_VECTOR, dl, VT, BVOps);
}
return Value;
bool DstAlignCanChange = false;
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
- bool OptSize =
- MF.getFunction()->getAttributes().
- hasAttribute(AttributeSet::FunctionIndex, Attribute::OptimizeForSize);
+ bool OptSize = MF.getFunction()->hasFnAttribute(Attribute::OptimizeForSize);
FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(Dst);
if (FI && !MFI->isFixedObjectIndex(FI->getIndex()))
DstAlignCanChange = true;
bool DstAlignCanChange = false;
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
- bool OptSize = MF.getFunction()->getAttributes().
- hasAttribute(AttributeSet::FunctionIndex, Attribute::OptimizeForSize);
+ bool OptSize = MF.getFunction()->hasFnAttribute(Attribute::OptimizeForSize);
FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(Dst);
if (FI && !MFI->isFixedObjectIndex(FI->getIndex()))
DstAlignCanChange = true;
bool DstAlignCanChange = false;
MachineFunction &MF = DAG.getMachineFunction();
MachineFrameInfo *MFI = MF.getFrameInfo();
- bool OptSize = MF.getFunction()->getAttributes().
- hasAttribute(AttributeSet::FunctionIndex, Attribute::OptimizeForSize);
+ bool OptSize = MF.getFunction()->hasFnAttribute(Attribute::OptimizeForSize);
FrameIndexSDNode *FI = dyn_cast<FrameIndexSDNode>(Dst);
if (FI && !MFI->isFixedObjectIndex(FI->getIndex()))
DstAlignCanChange = true;
SDValue SelectionDAG::getMemcpy(SDValue Chain, SDLoc dl, SDValue Dst,
SDValue Src, SDValue Size,
unsigned Align, bool isVol, bool AlwaysInline,
- MachinePointerInfo DstPtrInfo,
+ bool isTailCall, MachinePointerInfo DstPtrInfo,
MachinePointerInfo SrcPtrInfo) {
assert(Align && "The SDAG layer expects explicit alignment and reserves 0");
// Then check to see if we should lower the memcpy with target-specific
// code. If the target chooses to do this, this is the next best.
- SDValue Result =
- TSI->EmitTargetCodeForMemcpy(*this, dl, Chain, Dst, Src, Size, Align,
- isVol, AlwaysInline, DstPtrInfo, SrcPtrInfo);
- if (Result.getNode())
- return Result;
+ if (TSI) {
+ SDValue Result = TSI->EmitTargetCodeForMemcpy(
+ *this, dl, Chain, Dst, Src, Size, Align, isVol, AlwaysInline,
+ DstPtrInfo, SrcPtrInfo);
+ if (Result.getNode())
+ return Result;
+ }
// If we really need inline code and the target declined to provide it,
// use a (potentially long) sequence of loads and stores.
Type::getVoidTy(*getContext()),
getExternalSymbol(TLI->getLibcallName(RTLIB::MEMCPY),
TLI->getPointerTy()), std::move(Args), 0)
- .setDiscardResult();
- std::pair<SDValue,SDValue> CallResult = TLI->LowerCallTo(CLI);
+ .setDiscardResult()
+ .setTailCall(isTailCall);
+ std::pair<SDValue,SDValue> CallResult = TLI->LowerCallTo(CLI);
return CallResult.second;
}
SDValue SelectionDAG::getMemmove(SDValue Chain, SDLoc dl, SDValue Dst,
SDValue Src, SDValue Size,
- unsigned Align, bool isVol,
+ unsigned Align, bool isVol, bool isTailCall,
MachinePointerInfo DstPtrInfo,
MachinePointerInfo SrcPtrInfo) {
assert(Align && "The SDAG layer expects explicit alignment and reserves 0");
// Then check to see if we should lower the memmove with target-specific
// code. If the target chooses to do this, this is the next best.
- SDValue Result = TSI->EmitTargetCodeForMemmove(
- *this, dl, Chain, Dst, Src, Size, Align, isVol, DstPtrInfo, SrcPtrInfo);
- if (Result.getNode())
- return Result;
+ if (TSI) {
+ SDValue Result = TSI->EmitTargetCodeForMemmove(
+ *this, dl, Chain, Dst, Src, Size, Align, isVol, DstPtrInfo, SrcPtrInfo);
+ if (Result.getNode())
+ return Result;
+ }
// FIXME: If the memmove is volatile, lowering it to plain libc memmove may
// not be safe. See memcpy above for more details.
Type::getVoidTy(*getContext()),
getExternalSymbol(TLI->getLibcallName(RTLIB::MEMMOVE),
TLI->getPointerTy()), std::move(Args), 0)
- .setDiscardResult();
- std::pair<SDValue,SDValue> CallResult = TLI->LowerCallTo(CLI);
+ .setDiscardResult()
+ .setTailCall(isTailCall);
+ std::pair<SDValue,SDValue> CallResult = TLI->LowerCallTo(CLI);
return CallResult.second;
}
SDValue SelectionDAG::getMemset(SDValue Chain, SDLoc dl, SDValue Dst,
SDValue Src, SDValue Size,
- unsigned Align, bool isVol,
+ unsigned Align, bool isVol, bool isTailCall,
MachinePointerInfo DstPtrInfo) {
assert(Align && "The SDAG layer expects explicit alignment and reserves 0");
// Then check to see if we should lower the memset with target-specific
// code. If the target chooses to do this, this is the next best.
- SDValue Result = TSI->EmitTargetCodeForMemset(*this, dl, Chain, Dst, Src,
- Size, Align, isVol, DstPtrInfo);
- if (Result.getNode())
- return Result;
+ if (TSI) {
+ SDValue Result = TSI->EmitTargetCodeForMemset(
+ *this, dl, Chain, Dst, Src, Size, Align, isVol, DstPtrInfo);
+ if (Result.getNode())
+ return Result;
+ }
// Emit a library call.
Type *IntPtrTy = TLI->getDataLayout()->getIntPtrType(*getContext());
Type::getVoidTy(*getContext()),
getExternalSymbol(TLI->getLibcallName(RTLIB::MEMSET),
TLI->getPointerTy()), std::move(Args), 0)
- .setDiscardResult();
+ .setDiscardResult()
+ .setTailCall(isTailCall);
std::pair<SDValue,SDValue> CallResult = TLI->LowerCallTo(CLI);
return CallResult.second;
assert(VT.isInteger() == MemVT.isInteger() &&
"Cannot convert from FP to Int or Int -> FP!");
assert(VT.isVector() == MemVT.isVector() &&
- "Cannot use trunc store to convert to or from a vector!");
+ "Cannot use an ext load to convert to or from a vector!");
assert((!VT.isVector() ||
VT.getVectorNumElements() == MemVT.getVectorNumElements()) &&
- "Cannot use trunc store to change the number of vector elements!");
+ "Cannot use an ext load to change the number of vector elements!");
}
bool Indexed = AM != ISD::UNINDEXED;
SDValue
SelectionDAG::getMaskedLoad(EVT VT, SDLoc dl, SDValue Chain,
- SDValue Ptr, SDValue Mask, SDValue Src0,
- MachineMemOperand *MMO) {
+ SDValue Ptr, SDValue Mask, SDValue Src0, EVT MemVT,
+ MachineMemOperand *MMO, ISD::LoadExtType ExtTy) {
SDVTList VTs = getVTList(VT, MVT::Other);
SDValue Ops[] = { Chain, Ptr, Mask, Src0 };
FoldingSetNodeID ID;
AddNodeIDNode(ID, ISD::MLOAD, VTs, Ops);
ID.AddInteger(VT.getRawBits());
- ID.AddInteger(encodeMemSDNodeFlags(ISD::NON_EXTLOAD, ISD::UNINDEXED,
+ ID.AddInteger(encodeMemSDNodeFlags(ExtTy, ISD::UNINDEXED,
MMO->isVolatile(),
MMO->isNonTemporal(),
MMO->isInvariant()));
}
SDNode *N = new (NodeAllocator) MaskedLoadSDNode(dl.getIROrder(),
dl.getDebugLoc(), Ops, 4, VTs,
- VT, MMO);
+ ExtTy, MemVT, MMO);
CSEMap.InsertNode(N, IP);
InsertNode(N);
return SDValue(N, 0);
}
SDValue SelectionDAG::getMaskedStore(SDValue Chain, SDLoc dl, SDValue Val,
- SDValue Ptr, SDValue Mask, MachineMemOperand *MMO) {
+ SDValue Ptr, SDValue Mask, EVT MemVT,
+ MachineMemOperand *MMO, bool isTrunc) {
assert(Chain.getValueType() == MVT::Other &&
"Invalid chain type");
EVT VT = Val.getValueType();
}
SDNode *N = new (NodeAllocator) MaskedStoreSDNode(dl.getIROrder(),
dl.getDebugLoc(), Ops, 4,
- VTs, VT, MMO);
+ VTs, isTrunc, MemVT, MMO);
CSEMap.InsertNode(N, IP);
InsertNode(N);
return SDValue(N, 0);
assert(N->getNumOperands() == NumOps &&
"Update with wrong number of operands");
- // Check to see if there is no change.
- bool AnyChange = false;
- for (unsigned i = 0; i != NumOps; ++i) {
- if (Ops[i] != N->getOperand(i)) {
- AnyChange = true;
- break;
- }
- }
-
- // No operands changed, just return the input node.
- if (!AnyChange) return N;
+ // If no operands changed just return the input node.
+ if (Ops.empty() || std::equal(Ops.begin(), Ops.end(), N->op_begin()))
+ return N;
// See if the modified node already exists.
void *InsertPos = nullptr;
/// For IROrder, we keep the smaller of the two
SDNode *SelectionDAG::UpdadeSDLocOnMergedSDNode(SDNode *N, SDLoc OLoc) {
DebugLoc NLoc = N->getDebugLoc();
- if (!(NLoc.isUnknown()) && (OptLevel == CodeGenOpt::None) &&
- (OLoc.getDebugLoc() != NLoc)) {
+ if (NLoc && OptLevel == CodeGenOpt::None && OLoc.getDebugLoc() != NLoc) {
N->setDebugLoc(DebugLoc());
}
unsigned Order = std::min(N->getIROrder(), OLoc.getIROrder());
SDDbgValue *SelectionDAG::getDbgValue(MDNode *Var, MDNode *Expr, SDNode *N,
unsigned R, bool IsIndirect, uint64_t Off,
DebugLoc DL, unsigned O) {
+ assert(cast<MDLocalVariable>(Var)->isValidLocationForIntrinsic(DL) &&
+ "Expected inlined-at fields to agree");
return new (Allocator) SDDbgValue(Var, Expr, N, R, IsIndirect, Off, DL, O);
}
SDDbgValue *SelectionDAG::getConstantDbgValue(MDNode *Var, MDNode *Expr,
const Value *C, uint64_t Off,
DebugLoc DL, unsigned O) {
+ assert(cast<MDLocalVariable>(Var)->isValidLocationForIntrinsic(DL) &&
+ "Expected inlined-at fields to agree");
return new (Allocator) SDDbgValue(Var, Expr, C, Off, DL, O);
}
SDDbgValue *SelectionDAG::getFrameIndexDbgValue(MDNode *Var, MDNode *Expr,
unsigned FI, uint64_t Off,
DebugLoc DL, unsigned O) {
+ assert(cast<MDLocalVariable>(Var)->isValidLocationForIntrinsic(DL) &&
+ "Expected inlined-at fields to agree");
return new (Allocator) SDDbgValue(Var, Expr, FI, Off, DL, O);
}
if (TLI->isGAPlusOffset(Ptr.getNode(), GV, GVOffset)) {
unsigned PtrWidth = TLI->getPointerTypeSizeInBits(GV->getType());
APInt KnownZero(PtrWidth, 0), KnownOne(PtrWidth, 0);
- llvm::computeKnownBits(const_cast<GlobalValue*>(GV), KnownZero, KnownOne,
- TLI->getDataLayout());
+ llvm::computeKnownBits(const_cast<GlobalValue *>(GV), KnownZero, KnownOne,
+ *TLI->getDataLayout());
unsigned AlignBits = KnownZero.countTrailingOnes();
unsigned Align = AlignBits ? 1 << std::min(31U, AlignBits) : 0;
if (Align)
projects / oota-llvm.git / blobdiff