Revert r226811, MSVC accepts code sane compilers don't.

llvm-svn: 226814

1 files changed, 1 insertions, 22 deletions

diff --git a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
index c5ef77a3195..f75d5f4b2bd 100644
--- a/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+++ b/llvm/lib/CodeGen/SelectionDAG/SelectionDAG.cpp
@@ -1513,10 +1513,9 @@ SDValue SelectionDAG::getVectorShuffle(EVT VT, SDLoc dl, SDValue N1,
     return getUNDEF(VT);
 
   // If Identity shuffle return that node.
-  bool Identity = true, AllSame = true;
+  bool Identity = 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;
@@ -1550,26 +1549,6 @@ SDValue SelectionDAG::getVectorShuffle(EVT VT, SDLoc dl, SDValue N1,
           if (C->isNullValue())
             return N1;
       }
-
-      // If the shuffle itself creates a constant splat, build the vector
-      // directly.
-      if (AllSame) {
-         const SDValue &Splatted = BV->getOperand(MaskVec[0]);
-         if (isa<ConstantSDNode>(Splatted) || isa<ConstantFPSDNode>(Splatted)) {
-           SmallVector<SDValue, 8> Ops;
-           for (unsigned i = 0; i != NElts; ++i) {
-             Ops.push_back(Splatted);
-           }
-           SDValue &NewBV = getNode(ISD::BUILD_VECTOR, dl,
-             BV->getValueType(0), Ops);
-
-           // We may have jumped through bitcasts, so the type of the
-           // BUILD_VECTOR may not match the type of the shuffle.
-           if (BV->getValueType(0) != VT)
-             NewBV = getNode(ISD::BITCAST, dl, VT, NewBV);
-           return NewBV;
-         }
-      }
     }
   }