The test checks x86 target in fsycl-is-device mode. x86 is not a valid
offloading target and IMO test meant to check fsycl-is-host mode to make
sure host invocations of __builtin_sycl_unique_stable_name work
correctly. This also switches the test to use sycl_entry_point attribute
instead of sycl_kernel because the intention for the future SYCL changes
is to use sycl_entry_point and eventually remove sycl_kernel attribute
when sycl_entry_point supports enough SYCL cases.
Fixes https://github.com/llvm/llvm-project/issues/146566
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Co-authored-by: Tom Honermann <tom@honermann.net>
Co-authored-by: Victor Lomuller <victor@codeplay.com>
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