diff options
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index b5198c8510..a0fd4316c3 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -13430,6 +13430,11 @@ static SDValue PerformShiftCombine(SDNode* N, SelectionDAG &DAG, BaseShAmt = Arg; break; } + // Handle the case where the build_vector is all undef + // FIXME: Should DAG allow this? + if (i == NumElts) + return SDValue(); + for (; i != NumElts; ++i) { SDValue Arg = ShAmtOp.getOperand(i); if (Arg.getOpcode() == ISD::UNDEF) continue; |