https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88461
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #4 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
What we can do easily, but not sure if it won't lead to worse code for non-mask
code, would be to add either =k, km or =*k, *km alternatives to the various
zeroextend?i?i2 patterns, all we have right now are the mov?i_internal
patterns.
Because even the mov?i_internal patterns use *, perhaps best to use just that.
For this testcase that would still imply a kmov* instruction.
If we want to go further, we'd need patterns for the instructions that set
masks (comparisons etc.), which would contain zero_extend around the mask to
wider modes. That implies two iterators and guess it wouldn't play nicely with
define_subst, so we'd need to do that manually.
