[clang] [CLANG] Add warning when comparing to INF or NAN in fast math mode. (PR #76873)

[Andy Kaylor via cfe-commits]

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@@ -2245,6 +2246,11 @@ Sema::CheckBuiltinFunctionCall(FunctionDecl *FDecl, unsigned BuiltinID,
   case Builtin::BI__builtin_islessequal:
   case Builtin::BI__builtin_islessgreater:
   case Builtin::BI__builtin_isunordered:
+    if (BuiltinID == Builtin::BI__builtin_isunordered) {
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andykaylor wrote:

Should this check be in SemaBuiltinUnorderedCompare()?

https://github.com/llvm/llvm-project/pull/76873