[Bug rtl-optimization/50904] [4.7 regression] pessimization when -fno-protect-parens is enabled by -Ofast

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50904

--- Comment #21 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2011-12-02 10:54:45 UTC ---
> If the expressions only become invariant after unrolling then the issue
> is that without CCP LIM does not see they are invariant I suppose.

No, adding a CCP pass doesn't help (at least immediately).

> I'll have a closer look.

Thanks in advance.