[Bug tree-optimization/47447] [4.3/4.4 Regression] "Unable to coalesce ssa_names <x> and <y>" ICE in tree-ssa-coalesce.c when -O3 is used

[asharif at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47447

--- Comment #7 from asharif at gcc dot gnu.org 2011-02-03 22:26:48 UTC ---
(In reply to comment #5)
> I almost want to say LOOP_VINFO_NITERS should not have abnormal SSA's to begin
> with.

Andrew, shouldn't it be fine to have abnormal SSAs as long as they don't
conflict? That may be the best solution -- i.e. bailing out only if they will
conflict later on, as opposed to what my patch does (it bails out as soon as an
abnormal name is detected).