https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91837
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |wrong-code
Component|c++ |tree-optimization
--- Comment #2 from Richard Biener <rguenth at gcc dot gnu.org> ---
gcc-9-branch revision 275330 works fine for me, likewise the GCC 9.2 release.
Note I have to use -mprefer-vector-width=512 to get AVX512 instructions used.
> g++-9 t.C -O3 -march=native -mprefer-vector-width=512 -fopt-info-vec
t.C:35:23: optimized: loop vectorized using 64 byte vectors
t.C:32:23: optimized: loop vectorized using 64 byte vectors
/usr/include/c++/9/bits/stl_algobase.h:759:13: optimized: loop vectorized using
64 byte vectors
vs.
> g++-9 t.C -O3 -march=native -fopt-info-vec
t.C:35:23: optimized: loop vectorized using 32 byte vectors
t.C:32:23: optimized: loop vectorized using 32 byte vectors
/usr/include/c++/9/bits/stl_algobase.h:759:13: optimized: loop vectorized using
32 byte vectors
so, not confirmed.
