[Openmp-commits] [openmp] [openmp] __kmp_x86_cpuid fix for i386/PIC builds. (PR #84626)

[Michał Górny via Openmp-commits]

mgorny wrote:

I'm sorry to say but this change actually broke 32-bit builds on Gentoo, when u. Most of the tests segfault now, e.g.:

```
0/1] cd /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/test && /tmp/portage/sys-libs/libomp-19.0.0.9999/temp/python3.11/bin/python3 /usr/bin/lit -vv -j 12 /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/test
-- Testing: 325 tests, 12 workers --
FAIL: libomp :: affinity/format/api.c (1 of 325)
******************** TEST 'libomp :: affinity/format/api.c' FAILED ********************
Exit Code: -11

Command Output (stdout):
--
# RUN: at line 1
/usr/lib/ccache/bin/i686-pc-linux-gnu-clang -fopenmp   -I /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/src -I /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp/runtime/test -L /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/src  -fno-omit-frame-pointer -I /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp/runtime/test/ompt /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp/runtime/test/affinity/format/api.c -o /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/test/affinity/format/Output/api.c.tmp -lm -latomic && /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/test/affinity/format/Output/api.c.tmp
# executed command: /usr/lib/ccache/bin/i686-pc-linux-gnu-clang -fopenmp -I /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/src -I /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp/runtime/test -L /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/src -fno-omit-frame-pointer -I /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp/runtime/test/ompt /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp/runtime/test/affinity/format/api.c -o /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/test/affinity/format/Output/api.c.tmp -lm -latomic
# executed command: /tmp/portage/sys-libs/libomp-19.0.0.9999/work/openmp_build-abi_x86_32.x86/runtime/test/affinity/format/Output/api.c.tmp
# note: command had no output on stdout or stderr
# error: command failed with exit status: -11

--

********************
```

My educated guess is that you aren't listing `edi` in clobbers. If I do that, most of the tests start passing again but I still get a handful of segfaults.

https://github.com/llvm/llvm-project/pull/84626