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[Bug tree-optimization/38207] Union in structs are not well optimized
- 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: 21 Nov 2008 10:51:51 -0000
- Subject: [Bug tree-optimization/38207] Union in structs are not well optimized
- References: <bug-38207-6528@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #3 from rguenth at gcc dot gnu dot org 2008-11-21 10:51 -------
The oracle correctly figures that c_1(D)->D.1593.a and c_1(D)->D.1597.c do not
alias. The problem is a general defect in FRE that causes us to never CSE
a load with the default definition of the virtual SSA name.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Ever Confirmed|0 |1
Last reconfirmed|0000-00-00 00:00:00 |2008-11-21 10:51:51
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38207