http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57819
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |jakub at gcc dot gnu.org
--- Comment #1 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 30456
--> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30456&action=edit
gcc49-pr57819.patch
Untested fix. I've actually had in one version also optimization of the
zero_extend if SUBREG_REG's mode is wider then ZERO_EXTEND mode - then just
return lowpart subreg, but that breaks the test1 function, the matching is
quite sensitive.
