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[Bug target/52055] load of 64-bit pointer reads 64 bits even when only 32 are used
- From: "jakub 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 16:35:13 +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 #5 from Jakub Jelinek <jakub at gcc dot gnu.org> 2012-02-01 16:35:13 UTC ---
That's true, but currently REE is after reload, this combining would be better
done before reload. Perhaps a separate post-combine pre-ira pass could handle
that and also perhaps PR50176 (if it is somehow possible to insert CC clobbers
to insns that don't have it safely). The UD/DU links computation REE does is
very expensive I think.