[clang] [clang][SYCL Upstreaming] Add sycl_external attribute and restrict emitting device code (PR #140282)

[via cfe-commits]

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@@ -25,20 +40,29 @@ int main() {
   auto lambda2 = [](int){};
   auto lambda3 = [](double){};
 
-  kernel<class K1>(lambda1);
-  kernel2<class K2>(lambda2);
-  kernel3<class K3>(lambda3);
+  kernel_wrapper(lambda1);
+  kernel2_wrapper(lambda2);
+  kernel3_wrapper(lambda3);
 
   // Ensure the kernels are named the same between the device and host
   // invocations.
+  kernel_wrapper([](){
   (void)__builtin_sycl_unique_stable_name(decltype(lambda1));
   (void)__builtin_sycl_unique_stable_name(decltype(lambda2));
   (void)__builtin_sycl_unique_stable_name(decltype(lambda3));
+  });
 
   // Make sure the following 3 are the same between the host and device compile.
   // Note that these are NOT the same value as each other, they differ by the
   // signature.
   // CHECK: private unnamed_addr [[$ADDRSPACE]]constant [17 x i8] c"_ZTSZ4mainEUlvE_\00"
   // CHECK: private unnamed_addr [[$ADDRSPACE]]constant [17 x i8] c"_ZTSZ4mainEUliE_\00"
   // CHECK: private unnamed_addr [[$ADDRSPACE]]constant [17 x i8] c"_ZTSZ4mainEUldE_\00"
+
+  // On Windows, ensure that we haven't broken the 'lambda numbering' for thex
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schittir wrote:

Thank you for the review, @Fznamznon!

https://github.com/llvm/llvm-project/pull/140282