loop.c (mark_loop_jump): Handle LO_SUM.

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        * loop.c (mark_loop_jump): Handle LO_SUM.  If we encounter something
        we do not understand, mark the loop and containing loops as invalid.

From-SVN: r25214

gcc/ChangeLog

+Mon Feb 15 11:33:51 1999  Jeffrey A Law  (law@cygnus.com)
+
+	* loop.c (mark_loop_jump): Handle LO_SUM.  If we encounter something
+	we do not understand, mark the loop and containing loops as invalid.
+
 Mon Feb 15 00:40:45 1999  J"orn Rennecke <amylaar@cygnus.co.uk>
 
 	* alias.c (init_alias_analysis): Avoid self-referential value