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Simplify condition checking as CONCAT assume all inputs of the same type. 

llvm-svn: 166260
This commit is contained in:
Michael Liao 2012-10-19 03:17:00 +00:00
parent c26f5457d0
commit 2c2358036d
1 changed files with 3 additions and 3 deletions
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6
llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp
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@ -8629,9 +8629,9 @@ SDValue DAGCombiner::visitEXTRACT_SUBVECTOR(SDNode* N) {
// (extract_subvec (concat V1, V2, ...), i)
// Into:
// Vi if possible
for (unsigned i = 0, e = V->getNumOperands(); i != e; ++i)
if (V->getOperand(i).getValueType() != NVT)
return SDValue();
// Only operand 0 is checked as 'concat' assumes all inputs of the same type.
if (V->getOperand(0).getValueType() != NVT)
return SDValue();
unsigned Idx = dyn_cast<ConstantSDNode>(N->getOperand(1))->getZExtValue();
unsigned NumElems = NVT.getVectorNumElements();
assert((Idx % NumElems) == 0 &&