Re: gcn: Add missing GFX9_4_GENERIC, OpenMP context-selector update

[Andrew Stubbs]

On 15/10/2025 14:18, Tobias Burnus wrote:
The patch updates https://gcc.gnu.org/onlinedocs/libgomp/OpenMP-Context- 
Selectors.html
to clarify the behavior of 'isa("gfx9-generic")' vs. 'isa("gfx900")'.
(The documentation update also applies to Nvptx.)


Additionally, for AMD GCN, only:
- It enables the ISA context selector for generic ISAs names

- As copy-n-paste bug, gfx942 and gfx950 missed the link
   to their generic name (relevant for the ABI/ISA check in
   libgomp's plugin-gcn)

- I updated the context selector check to handle generic
   names: testsuite/libgomp.c/declare-variant-4*.{h,cc}

For the latter, expected result is:
- PASS for scan-amdgcn-amdhsa-offload-tree-dump
- some PASS, some FAIL for '(test for excess errors)'
depending on the configured multilib; if failing,
the message contains "ld: error: unable to find library -lgomp".

(The latter is consistent with previous results, except that
some more tests will fail, unless you have that multilib.)

OK for mainline?

The GCN bits look OK, although it would be nice if unsupported tests 
didn't FAIL.

Andrew