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[Bug middle-end/51895] [4.7 Regression] ICE in simplify_subreg
- From: "ebotcazou at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Thu, 19 Jan 2012 16:13:55 +0000
- Subject: [Bug middle-end/51895] [4.7 Regression] ICE in simplify_subreg
- Auto-submitted: auto-generated
- References: <bug-51895-4@http.gcc.gnu.org/bugzilla/>
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.