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Remove AllUndef check from one of the loops in getVectorShuffle. It was already handled by the 'AllLHS && AllRHS' check after the previous loop.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@187965 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Craig Topper 2013-08-08 08:03:12 +00:00
parent 37c107b9b5
commit eee2a11ee3
1 changed files with 1 additions and 5 deletions
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6
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -1351,17 +1351,13 @@ SDValue SelectionDAG::getVectorShuffle(EVT VT, SDLoc dl, SDValue N1,
commuteShuffle(N1, N2, MaskVec);
}
// If Identity shuffle, or all shuffle in to undef, return that node.
bool AllUndef = true;
// If Identity shuffle return that node.
bool Identity = true;
for (unsigned i = 0; i != NElts; ++i) {
if (MaskVec[i] >= 0 && MaskVec[i] != (int)i) Identity = false;
if (MaskVec[i] >= 0) AllUndef = false;
}
if (Identity && NElts == N1.getValueType().getVectorNumElements())
return N1;
if (AllUndef)
return getUNDEF(VT);
FoldingSetNodeID ID;
SDValue Ops[2] = { N1, N2 };