From 2c2358036df4ed294a451d4ffa812c6e81ae62ce Mon Sep 17 00:00:00 2001 From: Michael Liao Date: Fri, 19 Oct 2012 03:17:00 +0000 Subject: [PATCH] Simplify condition checking as CONCAT assume all inputs of the same type. llvm-svn: 166260 --- llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 22270968e3fb..17386b74e36b 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -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(N->getOperand(1))->getZExtValue(); unsigned NumElems = NVT.getVectorNumElements(); assert((Idx % NumElems) == 0 && -- 2.34.1