[clang] Clang: Support minimumnum and maximumnum intrinsics (PR #96281)

[Matt Arsenault via cfe-commits]

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@@ -15314,6 +15314,32 @@ bool FloatExprEvaluator::VisitCallExpr(const CallExpr *E) {
       Result = RHS;
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arsenm wrote:

Unrelated, but why is up here reproducing logic that's already in APFloat? 

https://github.com/llvm/llvm-project/pull/96281