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[Bug tree-optimization/32919] [4.3 Regression] SSA corruption because of abnormal edges and PRE
- From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 28 Jul 2007 00:05:03 -0000
- Subject: [Bug tree-optimization/32919] [4.3 Regression] SSA corruption because of abnormal edges and PRE
- References: <bug-32919-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #1 from pinskia at gcc dot gnu dot org 2007-07-28 00:05 -------
Value numbering spec_28(ab) stmt = spec_28(ab) = PHI <spec_7(ab)(3)>
Setting value number of spec_28(ab) to spec_7(ab)
We should not value number this PHI node, yes it is a copy but a needed copy
for abnormal edges.
Note the reduced testcase is missing an optimization but that is already filed
as PR 32810.
--
pinskia at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |dberlin at gcc dot gnu dot
| |org
Keywords| |ice-on-valid-code
Target Milestone|--- |4.3.0
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32919