[clang] [libc] [llvm] [clang] Make __builtin_exp and __builtin_expf constexpr. (PR #199808)

[via cfe-commits]

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@@ -2737,7 +2741,8 @@ static bool checkFloatingPointResult(EvalInfo &Info, const Expr *E,
   // - the expression being evaluated is not a part of global variable
   //   initializer,
   // the evaluation probably need to be rejected.
-  return true;
+  Info.FFDiag(E, diag::note_constexpr_float_arithmetic_strict);
+  return false;
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lntue wrote:

Done.  I updated the checks to deal with global variable initializers.

https://github.com/llvm/llvm-project/pull/199808