[llvm-branch-commits] [llvm] InstCombine: Handle multiple use copysign (PR #176917)

[Yingwei Zheng via llvm-branch-commits]

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@@ -2616,7 +2618,8 @@ Value *InstCombinerImpl::SimplifyDemandedUseFPClass(Instruction *I,
       }
 
       if (Value *Simplified = simplifyDemandedFPClassCopysignMag(
-              CI->getArgOperand(0), DemandedMask, Known, FMF.noSignedZeros()))
+              CI->getArgOperand(0), DemandedMask, KnownMag,
+              FMF.noSignedZeros()))
         return Simplified;
 
       KnownFPClass KnownSign = computeKnownFPClass(CI->getArgOperand(1),
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dtcxzyw wrote:

The position is out of sync. I mean `Known.SignBit && KnownSign.SignBit` -> KnownMag.SignBit && KnownSign.SignBit.

https://github.com/llvm/llvm-project/pull/176917