diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
-rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index fd156fa7dd07..2c7bffe76503 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -13072,9 +13072,15 @@ SDValue DAGCombiner::createBuildVecShuffle(SDLoc DL, SDNode *N, !TLI.isOperationLegal(ISD::VECTOR_SHUFFLE, InVT1)) return SDValue(); - if (InVT1 != InVT2) + // Legalizing INSERT_SUBVECTOR is tricky - you basically have to + // lower it back into a BUILD_VECTOR. So if the inserted type is + // illegal, don't even try. + if (InVT1 != InVT2) { + if (!TLI.isTypeLegal(InVT2)) + return SDValue(); VecIn2 = DAG.getNode(ISD::INSERT_SUBVECTOR, DL, InVT1, DAG.getUNDEF(InVT1), VecIn2, ZeroIdx); + } ShuffleNumElems = NumElems * 2; } else { // Both VecIn1 and VecIn2 are wider than the output, and VecIn2 is wider |