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[X86] Simplify lowerVectorShuffleAsBitMask to handle only integer VT's 

Summary: This function is only called with integer VT arguments, so remove code that handles FP vectors.

Reviewers: RKSimon, craig.topper, delena, andreadb

Subscribers: llvm-commits

Differential Revision: https://reviews.llvm.org/D26985

llvm-svn: 287743
This commit is contained in:
Zvi Rackover 2016-11-23 06:45:25 +00:00
parent 768c6f0ca6
commit 14aba43ea9
1 changed files with 5 additions and 13 deletions
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18
llvm/lib/Target/X86/X86ISelLowering.cpp
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@ -7627,16 +7627,11 @@ static SDValue lowerVectorShuffleAsBitMask(const SDLoc &DL, MVT VT, SDValue V1,
SDValue V2, ArrayRef<int> Mask,
const SmallBitVector &Zeroable,
SelectionDAG &DAG) {
assert(!VT.isFloatingPoint() && "Floating point types are not supported");
MVT EltVT = VT.getVectorElementType();
int NumEltBits = EltVT.getSizeInBits();
MVT IntEltVT = MVT::getIntegerVT(NumEltBits);
SDValue Zero = DAG.getConstant(0, DL, IntEltVT);
SDValue AllOnes = DAG.getConstant(APInt::getAllOnesValue(NumEltBits), DL,
IntEltVT);
if (EltVT.isFloatingPoint()) {
Zero = DAG.getBitcast(EltVT, Zero);
AllOnes = DAG.getBitcast(EltVT, AllOnes);
}
SDValue Zero = DAG.getConstant(0, DL, EltVT);
SDValue AllOnes =
DAG.getConstant(APInt::getAllOnesValue(EltVT.getSizeInBits()), DL, EltVT);
SmallVector<SDValue, 16> VMaskOps(Mask.size(), Zero);
SDValue V;
for (int i = 0, Size = Mask.size(); i < Size; ++i) {
@ -7655,10 +7650,7 @@ static SDValue lowerVectorShuffleAsBitMask(const SDLoc &DL, MVT VT, SDValue V1,
return SDValue(); // No non-zeroable elements!
SDValue VMask = DAG.getBuildVector(VT, DL, VMaskOps);
V = DAG.getNode(VT.isFloatingPoint()
? (unsigned) X86ISD::FAND : (unsigned) ISD::AND,
DL, VT, V, VMask);
return V;
return DAG.getNode(ISD::AND, DL, VT, V, VMask);
}
/// \brief Try to emit a blend instruction for a shuffle using bit math.