[clang] [Clang] Throw error when calling atomic with pointer to zero size object (PR #91057)

[Aaron Ballman via cfe-commits]

================
@@ -8497,7 +8498,8 @@ ExprResult Sema::BuildAtomicExpr(SourceRange CallRange, 
SourceRange ExprRange,
         << 0 << AdjustedNumArgs << static_cast<unsigned>(Args.size())
         << /*is non object*/ 0 << ExprRange;
     return ExprError();
-  } else if (Args.size() > AdjustedNumArgs) {
+  }
+  if (Args.size() > AdjustedNumArgs) {
----------------
AaronBallman wrote:

The change is correct per our coding standard, but is unrelated to the changes 
in your patch. I'd say you can land this specific change as an NFC commit if 
you'd like, but otherwise it should be backed out of this PR.

https://github.com/llvm/llvm-project/pull/91057
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