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[Bug middle-end/38533] [4.2/4.3/4.4 regression] tree-ssa-reassoc.c increases register pressure several times
- From: "jakub at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 17 Dec 2008 16:04:30 -0000
- Subject: [Bug middle-end/38533] [4.2/4.3/4.4 regression] tree-ssa-reassoc.c increases register pressure several times
- References: <bug-38533-17083@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #6 from jakub at gcc dot gnu dot org 2008-12-17 16:04 -------
The problem with the patch is that useless insns (visited with has_zero_uses on
lhs) are now scattered in the bbs and so aren't removed immediately.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38533