http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56087
Mikael Pettersson <mikpe at it dot uu.se> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |mikpe at it dot uu.se --- Comment #2 from Mikael Pettersson <mikpe at it dot uu.se> 2013-01-23 21:15:40 UTC --- (In reply to comment #0) > Using the same register twice in muls.l is not permitted. This sounds a lot like PR52573, a patch was proposed in July 2012 and finally approved and committed a few days ago in r195288, see <http://gcc.gnu.org/ml/gcc-patches/2013-01/msg00936.html>. Can you confirm that Debian's gcc 4.6 lacks the PR52573 fix but its 4.7 does have the fix? If that's not the case, then this must be a different bug that just happens to have symptoms similar to PR52573.