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

[Matt Arsenault via cfe-commits]

================
@@ -15314,6 +15314,32 @@ bool FloatExprEvaluator::VisitCallExpr(const CallExpr 
*E) {
       Result = RHS;
     return true;
   }
+
+  case Builtin::BI__builtin_fmaximum_num:
+  case Builtin::BI__builtin_fmaximum_numf:
+  case Builtin::BI__builtin_fmaximum_numl:
+  case Builtin::BI__builtin_fmaximum_numf16:
+  case Builtin::BI__builtin_fmaximum_numf128: {
+    APFloat RHS(0.);
+    if (!EvaluateFloat(E->getArg(0), Result, Info) ||
----------------
arsenm wrote:

This doesn't have tests showing the evaluation, similar to those added for 
fmin/fmax in ec32386404409b65d21fdf916110c08912335926

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