diff options
Diffstat (limited to 'lib/CodeGen/SelectionDAG/DAGCombiner.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index df951a51bb..569b1a91d7 100644 --- a/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -2272,9 +2272,13 @@ SDOperand DAGCombiner::ReduceLoadWidth(SDNode *N) { MVT::ValueType VT = N->getValueType(0); MVT::ValueType EVT = N->getValueType(0); + // Special case: SIGN_EXTEND_INREG is basically truncating to EVT then + // extended to VT. if (Opc == ISD::SIGN_EXTEND_INREG) { ExtType = ISD::SEXTLOAD; EVT = cast<VTSDNode>(N->getOperand(1))->getVT(); + if (AfterLegalize && !TLI.isLoadXLegal(ISD::SEXTLOAD, EVT)) + return SDOperand(); } unsigned EVTBits = MVT::getSizeInBits(EVT); |