[Bug target/67657] [SH][5]: internal compiler error: in cselib_record_set, at cselib.c:2396 when compiling libjpeg-turbo

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67657

--- Comment #7 from Oleg Endo <olegendo at gcc dot gnu.org> ---
Created attachment 36357
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36357&action=edit
Proposed patch

Although a "mov @r2+,r2" is actually possible and valid (r2 will contain the
value loaded from memory, AFAIR), it doesn't make sense to keep the post-inc,
as the result will be overwritten anyway.  The patch catches those cases in the
peepholes and removes the post-inc.  I'm now testing this on sh-elf.