https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67295
Jakub Jelinek <jakub at gcc dot gnu.org> changed:
What |Removed |Added
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CC| |law at gcc dot gnu.org
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
At the RTL level, it would be nice if REE optimized away at least the redundant
zero extension, thus change:
cmp r1, #0
rev16ne r0, r0
uxthne r0, r0
.L2:
sxth r0, r0
b foos16
to
cmp r1, #0
rev16ne r0, r0
.L2:
sxth r0, r0
b foos16
but it seems ARM doesn't enable REE at all. Or should some other pass handle
that case?
