diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index 90356021f60..c5f0324ac41 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -3887,7 +3887,9 @@ SDValue DAGCombiner::visitZERO_EXTEND(SDNode *N) { } // fold (zext (load x)) -> (zext (truncate (zextload x))) - if (ISD::isNON_EXTLoad(N0.getNode()) && + // None of the supported targets knows how to perform load and vector_zext + // in one instruction. We only perform this transformation on scalar zext. + if (ISD::isNON_EXTLoad(N0.getNode()) && !VT.isVector() && ((!LegalOperations && !cast<LoadSDNode>(N0)->isVolatile()) || TLI.isLoadExtLegal(ISD::ZEXTLOAD, N0.getValueType()))) { bool DoXform = true; |
