[llvm] [llvm] Add support for llvm IR atomicrmw fminimum/fmaximum instructions (PR #136759)

[Jonathan Thackray via llvm-commits]

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@@ -68,6 +68,12 @@ bool isSaturating(AtomicRMWInst& RMWI) {
     case AtomicRMWInst::FMin:
       // minnum(x, -inf) -> +inf
       return CF->isNegative() && CF->isInfinity();
+    case AtomicRMWInst::FMaximum:
+      // maximum(x, +inf) -> +inf
+      return !CF->isNegative() && CF->isInfinity();
+    case AtomicRMWInst::FMinimum:
+      // minimum(x, -inf) -> +inf
+      return CF->isNegative() && CF->isInfinity();
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jthackray wrote:

Thanks. I've removed these, as @arsenm says below they should be done in a later patch.

https://github.com/llvm/llvm-project/pull/136759