[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

1 files changed, 5 insertions, 13 deletions

diff --git a/llvm/lib/Target/X86/X86ISelLowering.cpp b/llvm/lib/Target/X86/X86ISelLowering.cpp
index 0a4fa41954f..b89383d2ce6 100644
--- a/llvm/lib/Target/X86/X86ISelLowering.cpp
+++ b/llvm/lib/Target/X86/X86ISelLowering.cpp
@@ -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.