[Bug libgomp/81689] libgomp.c/target-link-1.c fails for nvptx: #pragma omp target link not implemented

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81689

--- Comment #2 from Tobias Burnus <burnus at gcc dot gnu.org> ---
While the two PRs have fixed offloading for AMDGCN, nvptx still fails with the
same error. The generated assembler is:

 "ld.global.u64 %r27,[a$linkptr];\n"

But there is NO associated global-var declaration
similar to:

 "// BEGIN GLOBAL VAR DECL: __nvptx_uni\n"
 ".extern .shared .u32 __nvptx_uni[32];\n"

In principle, it should be generated by nvptx_output_aligned_decl – but this
never called. It is currently called via ASM_OUTPUT_ALIGNED_DECL_COMMON and
ASM_OUTPUT_ALIGNED_DECL_LOCAL.

Without proper debugging, I have the feeling that ASM_OUTPUT_ALIGNED_BSS is
called for this – but that's not defined for nvptx. Nor is
TARGET_ASM_SELECT_SECTION.