https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71022
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Last reconfirmed| |2016-05-10
Ever confirmed|0 |1
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
IRA might choose to do this as part of life-range splitting/shortening. Note
that reg-reg moves may be cheaper code-size wise (like on CISC archs with
non-fixed insn lengths). RTL cost should tell you, of course.