[Bug rtl-optimization/56339] [4.8 Regression]: Suboptimal register allocation

[steven at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56339

--- Comment #8 from Steven Bosscher <steven at gcc dot gnu.org> 2013-03-08 18:49:09 UTC ---
(In reply to comment #6)
> So - what regressed this compared to 4.7?  It wasn't regmove.c changes.

Probably LRA, it better respects IRA's choices (which is good).  The fix
should be found in a change to IRA or regmove.