------- Comment #1 from rguenth at gcc dot gnu dot org 2008-05-15 10:12 -------
Confirmed. The problem is how we compute MTAG_GLOBAL and call clobbering.
We assert that "unmodifiable" variables are not call clobbered and
"unmodifiable" is if MTAG_GLOBAL && TREE_READONLY. Now we transition between
unmodifiable and not unmodifiable in compute_tag_properties and are not
careful making an already call clobbered variable unmodifiable.
The simplest fix is to remove the offending assert (we only believe we have
extra call clobbering - but I think this is not true in general).
Note I cannot reproduce this on the trunk but on the 4.3 branch only.
--
rguenth at gcc dot gnu dot org changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |NEW
Component|tree-optimization |middle-end
Ever Confirmed|0 |1
Keywords| |alias, ice-on-valid-code
Known to fail| |4.3.1
Last reconfirmed|0000-00-00 00:00:00 |2008-05-15 10:12:50
date| |
Summary|-ftree-parallelize-loops=4, |-ftree-parallelize-loops=4,
|vectorizer enabled, ICE |vectorizer enabled, ICE
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=36244
