[llvm] [LV] Vectorize FMax via OrderedFCmpSelect w/o fast-math flags. (PR #146711)

[via llvm-commits]

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@@ -962,6 +963,14 @@ RecurrenceDescriptor::InstDesc RecurrenceDescriptor::isRecurrenceInstr(
                "unexpected recurrence kind for minnum");
         return InstDesc(I, RecurKind::FMinNum);
       }
+      if (Kind == RecurKind::FMax || Kind == RecurKind::OrderedFCmpSelect) {
+        if (isa<SelectInst>(I))
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ayalz wrote:

SelectInst need not check that its comparison is ordered and isMinMaxPattern() like FCmpInst below?

https://github.com/llvm/llvm-project/pull/146711