[clang] [clang][SYCL] Handle cdecl variadic functions for SYCL device (PR #194922)

[Erich Keane via cfe-commits]

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@@ -4459,6 +4460,11 @@ void Sema::checkCall(NamedDecl *FDecl, const FunctionProtoType *Proto,
     }
   }
 
+  if (FD && FD->isVariadic() && getLangOpts().SYCLIsDevice &&
+      !isUnevaluatedContext()) {
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erichkeane wrote:

single liner shouldn't have curleys.

https://github.com/llvm/llvm-project/pull/194922