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[Bug tree-optimization/17517] [4.0 Regression] ICE: SSA corruption
- From: "amacleod at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 16 Sep 2004 13:12:14 -0000
- Subject: [Bug tree-optimization/17517] [4.0 Regression] ICE: SSA corruption
- References: <20040916101717.17517.steven@gcc.gnu.org>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Additional Comments From amacleod at redhat dot com 2004-09-16 13:12 -------
a followon issue with copyrename.
if we have an abnormal PHI:
a_6 = <a_4, a_3>
and somewhere else we have
p_9 = a_2
<...>
a_3 = a_2
we coalesce p_9 and a_2 because there is no reason not to.
a_3 and a_2 are automatically coalesced since they hgave the same root.
now we have p_9 propgated into the abnormal PHI, and boom.
--
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |ASSIGNED
Ever Confirmed| |1
Last reconfirmed|0000-00-00 00:00:00 |2004-09-16 13:12:10
date| |
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17517