[clang] [clang][sema] make sure arguments of __atomic_exchange complete type (PR #75135)

[Erich Keane via cfe-commits]

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@@ -7885,6 +7885,18 @@ ExprResult Sema::BuildAtomicExpr(SourceRange CallRange, SourceRange ExprRange,
   if ((IsOpenCL || IsHIP || IsScoped) &&
       Op != AtomicExpr::AO__opencl_atomic_init)
     ++AdjustedNumArgs;
+
+  // Verify if the arguments are of type CompleteType
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erichkeane wrote:

When doing so, please see if you can 'extract' this to a function, something like;

`RequireAtomicArgs(Args)` kind of thing.

https://github.com/llvm/llvm-project/pull/75135