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

[Timm Baeder via cfe-commits]

================
@@ -9,6 +9,7 @@
 #include "Boolean.h"
 #include "Char.h"
 #include "EvalEmitter.h"
+#include "Interp.h"
----------------
tbaederr wrote:

You should add whatever is needed (or its prototype) from Interp.h (I guess `CheckFloatStatus`) to `InterpHelpers.h` instead.

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