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[Bug tree-optimization/23821] [4.0/4.1/4.2/4.3 Regression] DOM and VRP creating harder to optimize code
- 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: 12 Jan 2008 10:49:50 -0000
- Subject: [Bug tree-optimization/23821] [4.0/4.1/4.2/4.3 Regression] DOM and VRP creating harder to optimize code
- References: <bug-23821-5077@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #15 from rguenth at gcc dot gnu dot org 2008-01-12 10:49 -------
I think symbolic substitutions should be only done if the resulting stmt can
be simplified to a constant. Now for VRP my long-term plan is to get rid of
symbolic ranges altogether to make it cheaper and easier to keep value-range
information across passes.
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rguenth at gcc dot gnu dot org changed:
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23821