[clang] [Clang] Fix assertion failure when passing wide string literal to __builtin_nanf (PR #205452)

[Aaron Ballman via cfe-commits]

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@@ -0,0 +1,3 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+
+char hello = __builtin_nanf(L""); // expected-error {{incompatible pointer types passing 'int[1]' to parameter of type 'const char *'}}
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AaronBallman wrote:

Can you also add coverage for other string literal formats and other nan spellings?

https://github.com/llvm/llvm-project/pull/205452