[Bug tree-optimization/88531] Index data types when targeting AVX-512 vectorization with gather/scatter
jakub at gcc dot gnu.org
gcc-bugzilla@gcc.gnu.org
Mon Dec 17 12:32:00 GMT 2018
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88531
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |hjl.tools at gmail dot com
--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
I think I haven't changed anything on this. AVX2 and AVX512{F,VL} gathers and
scatters only do signed widening themselves. Thus, if the index is uint32_t
and -m64, the only hope would be to perform vectorization conversion of it to
uint64_t/int64_t vector first and then use gathers or scatters with V*DImode
indexes.
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