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

[via cfe-commits]

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@@ -406,55 +406,55 @@ def LogF16F128 : Builtin, F16F128MathTemplate {
 
 def LrintF128 : Builtin {
   let Spellings = ["__builtin_lrintf128"];
-  let Attributes = [FunctionWithBuiltinPrefix, NoThrow, ConstIgnoringErrnoAndExceptions];
+  let Attributes = [FunctionWithBuiltinPrefix, NoThrow, ConstIgnoringErrnoAndExceptions, Constexpr];
   let Prototype = "long int(__float128)";
 }
 
 def LroundF128 : Builtin {
   let Spellings = ["__builtin_lroundf128"];
-  let Attributes = [FunctionWithBuiltinPrefix, NoThrow, ConstIgnoringErrnoAndExceptions];
+  let Attributes = [FunctionWithBuiltinPrefix, NoThrow, ConstIgnoringErrnoAndExceptions, Constexpr];
   let Prototype = "long int(__float128)";
 }
 
-def NearbyintF128 : Builtin {
-  let Spellings = ["__builtin_nearbyintf128"];
-  let Attributes = [FunctionWithBuiltinPrefix, NoThrow, Const];
-  let Prototype = "__float128(__float128)";
+def NearbyintF16F128 : Builtin, F16F128MathTemplate {
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Serosh-commits wrote:

:\ done 

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