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

[Matt Arsenault via llvm-commits]

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@@ -8776,6 +8776,8 @@ Value *OpenMPIRBuilder::emitRMWOpAsInstruction(Value *Src1, Value *Src2,
   case AtomicRMWInst::UMin:
   case AtomicRMWInst::FMax:
   case AtomicRMWInst::FMin:
+  case AtomicRMWInst::FMaximum:
+  case AtomicRMWInst::FMinimum:
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arsenm wrote:

This code really should be deleted. I don't know why OMPIRBuilder has anything like this, but it's also a straight copy of the lower atomic utility 

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