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[Bug tree-optimization/37102] [4.3/4.4 Regression] out-of-SSA is broken
- From: "rguenth at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 4 Sep 2008 16:17:45 -0000
- Subject: [Bug tree-optimization/37102] [4.3/4.4 Regression] out-of-SSA is broken
- References: <bug-37102-12544@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #9 from rguenth at gcc dot gnu dot org 2008-09-04 16:17 -------
Thanks for the explanation, for the branch I would recommend an extra DCE
pass right before pass_del_ssa. On the trunk we need to make sure to run
this at -O0 as well. Note that the simple DCE can leave dead statements
around, only control-dependent DCE will make sure to not retain any
DCE opportunities.
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37102