[Bug middle-end/51895] [4.7 Regression] ICE in simplify_subreg

[ebotcazou at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51895

--- Comment #10 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-01-19 16:13:55 UTC ---
> I wonder why it does this, instead of just using type S, and if it really has
> to for some reason, why it can't at least make sure it has the same TYPE_MODE.
> Changing a TImode argument to a BLKmode argument doesn't look at least like a
> good optimization.

I concur, BLKmode means spilling to memory at some point, so this looks like a
clear pessimization to me.