[clang] [Clang] Add constexpr eval for cmath builtins (PR #194327)

[via cfe-commits]

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@@ -717,6 +717,335 @@ static inline Floating abs(InterpState &S, const Floating &In) {
   return Output;
 }
 
+static bool interp__builtin_ceil(InterpState &S, CodePtr OpPC,
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Serosh-commits wrote:

my bad :\ done i have renamed it and expanded it to explicitly handle all standard variants needed

https://github.com/llvm/llvm-project/pull/194327