[llvm] [ConstraintElimination] Add support for UCMP/SCMP intrinsics (PR #97974)

[via llvm-commits]

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@@ -1736,6 +1765,11 @@ static bool eliminateConstraints(Function &F, DominatorTree &DT, LoopInfo &LI,
         Changed |= Simplified;
       } else if (auto *MinMax = dyn_cast<MinMaxIntrinsic>(Inst)) {
         Changed |= checkAndReplaceMinMax(MinMax, Info, ToRemove);
+      } else if (auto *CmpIntrinsic = dyn_cast<IntrinsicInst>(Inst);
+                 CmpIntrinsic &&
+                 (CmpIntrinsic->getIntrinsicID() == Intrinsic::scmp ||
+                  CmpIntrinsic->getIntrinsicID() == Intrinsic::ucmp)) {
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Poseydon42 wrote:

Added the suggested class. I can't think of any good way to remove code duplication between `icmp` and `ucmp/scmp`, but if there are any suggestions I'm happy to implement them.

https://github.com/llvm/llvm-project/pull/97974