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

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226814 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Kuperstein
2015-01-22 12:48:07 +00:00
parent 0a979a09ae
commit 8fc1c3a619
5 changed files with 6 additions and 85 deletions
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lib/CodeGen/SelectionDAG/SelectionDAG.cpp
+1 -22
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@@ -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;
}
}
}
}