[clang] [clang][SYCL] Disable float128 device mode diagnostic (PR #128513)

[Alexey Bader via cfe-commits]

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@@ -4700,7 +4700,8 @@ void Sema::AddModeAttr(Decl *D, const AttributeCommonInfo &CI,
 
   if (NewElemTy.isNull()) {
     // Only emit diagnostic on host for 128-bit mode attribute
-    if (!(DestWidth == 128 && getLangOpts().CUDAIsDevice))
+    if (!(DestWidth == 128 &&
+          (getLangOpts().CUDAIsDevice || getLangOpts().SYCLIsDevice)))
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bader wrote:

Now, I'd like to understand how OpenMP compiler solves that problem and why OpenMP solution seems to be different from CUDA. @npmiller, do you know any reason why they should be different?

https://github.com/llvm/llvm-project/pull/128513