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[Bug target/52055] load of 64-bit pointer reads 64 bits even when only 32 are used
- 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: Wed, 01 Feb 2012 16:13:43 +0000
- Subject: [Bug target/52055] load of 64-bit pointer reads 64 bits even when only 32 are used
- Auto-submitted: auto-generated
- References: <bug-52055-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52055
--- Comment #4 from Eric Botcazou <ebotcazou at gcc dot gnu.org> 2012-02-01 16:13:43 UTC ---
> So, shell we do this kind of shortening in fwprop instead? If a MEM load has
> all uses subregged to a narrower mode, try to subreg it and adjust the callers?
This would be backward combining (a la REE) though, not forward propagating.