[llvm-branch-commits] [llvm] InstCombine: Improve SimplifyDemandedFPClass min/max handling (PR #175382)

[Yingwei Zheng via llvm-branch-commits]

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@@ -2329,29 +2329,23 @@ Value *InstCombinerImpl::SimplifyDemandedUseFPClass(Instruction *I,
         KnownRHS.knownNot(fcNan);
       }
 
-      KnownFPClass::MinMaxKind OpKind;
+      bool OrderedZeroSign = !FMF.noSignedZeros();
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dtcxzyw wrote:

When `OrderedZeroSign` is true, `cannotOrderStrictlyXXX` is more likely to return true. It is a bit weird that additional nsz pessimize optimization.

https://github.com/llvm/llvm-project/pull/175382