https://gcc.gnu.org/bugzilla/show_bug.cgi?id=66511
Roger Sayle <roger at nextmovesoftware dot com> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |roger at nextmovesoftware dot
com
--- Comment #4 from Roger Sayle <roger at nextmovesoftware dot com> ---
Created attachment 54871
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=54871&action=edit
proposed patch
Proposed patch, using a peephole2 in avr-dimode.md to inline calls to __lshrdi3
that require only a single instruction or two (due to truncation). For
truncations to char, this is smaller and faster, and for truncations to
unsigned short this is the same size, but faster. The drawback is that
performing this late (in peephole2) doesn't eliminate the stack frame
prolog/epilog. Thoughts?
