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| author | Joseph Myers <joseph@codesourcery.com> | 2017-03-15 17:32:46 +0000 |
|---|---|---|
| committer | Joseph Myers <joseph@codesourcery.com> | 2017-03-15 17:32:46 +0000 |
| commit | ffe308e4fcf2f276c87fd405596569ba52ad0a29 (patch) | |
| tree | 6d75f028e52fcc225416090f06daaa9a0677758f /sysdeps/alpha/Versions | |
| parent | ff80ec4283493958d7ee9ac8e41ca09837f70bcd (diff) | |
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Fix test-math-vector-sincos.h aliasing.
x86_64 libmvec tests have been failing to build lately with GCC
mainline with -Wuninitialized errors, and Markus Trippelsdorf traced
this to an aliasing issue
<https://sourceware.org/ml/libc-alpha/2017-03/msg00169.html>.
This patch fixes the aliasing issue, so that the vectors-of-pointers
are initialized using a union instead of pointer casts. This also
fixes the testsuite build failures with GCC mainline.
Tested for x86_64 (full testsuite with GCC 6; testsuite build with GCC
mainline with build-many-glibcs.py).
* sysdeps/x86/fpu/test-math-vector-sincos.h (INIT_VEC_PTRS_LOOP):
Use a union when storing pointers.
(VECTOR_WRAPPER_fFF_2): Do not take address of integer vector and
cast result when passing to INIT_VEC_PTRS_LOOP.
(VECTOR_WRAPPER_fFF_3): Likewise.
(VECTOR_WRAPPER_fFF_4): Likewise.
Diffstat (limited to 'sysdeps/alpha/Versions')
0 files changed, 0 insertions, 0 deletions