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[Bug tree-optimization/16306] [4.0/4.1 Regression] restrict and copying pointers problem
- From: "steven 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 Oct 2005 20:58:03 -0000
- Subject: [Bug tree-optimization/16306] [4.0/4.1 Regression] restrict and copying pointers problem
- References: <bug-16306-1008@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from steven at gcc dot gnu dot org 2005-10-12 20:58 -------
The patch mentioned in #2 is not sufficient anymore. copy propagation and VRP
also propagate copies of this kind. And may_propagate_copy is not used in most
places, and even when it _is_ used, it doesn't help because it allows this kind
of copies to be performed.
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=16306