diff options
Diffstat (limited to 'lib/Target/SystemZ/SystemZISelDAGToDAG.cpp')
-rw-r--r-- | lib/Target/SystemZ/SystemZISelDAGToDAG.cpp | 18 |
1 files changed, 10 insertions, 8 deletions
diff --git a/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp b/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp index d95361eed1..aa4752c2ba 100644 --- a/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp +++ b/lib/Target/SystemZ/SystemZISelDAGToDAG.cpp @@ -769,15 +769,17 @@ bool SystemZDAGToDAGISel::expandRxSBG(RxSBGOperands &RxSBG) const { RxSBG.Input = N.getOperand(0); return true; - case ISD::ZERO_EXTEND: { - // Restrict the mask to the extended operand. - unsigned InnerBitSize = N.getOperand(0).getValueType().getSizeInBits(); - if (!refineRxSBGMask(RxSBG, allOnes(InnerBitSize))) - return false; + case ISD::ZERO_EXTEND: + if (RxSBG.Opcode != SystemZ::RNSBG) { + // Restrict the mask to the extended operand. + unsigned InnerBitSize = N.getOperand(0).getValueType().getSizeInBits(); + if (!refineRxSBGMask(RxSBG, allOnes(InnerBitSize))) + return false; - RxSBG.Input = N.getOperand(0); - return true; - } + RxSBG.Input = N.getOperand(0); + return true; + } + // Fall through. case ISD::SIGN_EXTEND: { // Check that the extension bits are don't-care (i.e. are masked out |