diff options
| -rw-r--r-- | lib/Target/X86/X86ISelLowering.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp index 846acd0219..7a4d34d10a 100644 --- a/lib/Target/X86/X86ISelLowering.cpp +++ b/lib/Target/X86/X86ISelLowering.cpp @@ -7515,6 +7515,14 @@ void X86TargetLowering::computeMaskedBitsForTargetNode(const SDValue Op, KnownZero = KnownOne = APInt(Mask.getBitWidth(), 0); // Don't know anything. switch (Opc) { default: break; + case X86ISD::ADD: + case X86ISD::SUB: + case X86ISD::SMUL: + case X86ISD::UMUL: + // These nodes' second result is a boolean. + if (Op.getResNo() == 0) + break; + // Fallthrough case X86ISD::SETCC: KnownZero |= APInt::getHighBitsSet(Mask.getBitWidth(), Mask.getBitWidth() - 1); |