[Bug middle-end/42245] ICE in verify_backedges for 197.parser with sel-sched

["amonakov at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #9 from amonakov at gcc dot gnu dot org  2010-01-14 10:29 -------
Subject: Bug 42245

Author: amonakov
Date: Thu Jan 14 10:28:47 2010
New Revision: 155890

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=155890
Log:
2010-01-14  Andrey Belevantsev  <abel@ispras.ru>
            Alexander Monakov  <amonakov@ispras.ru>

        PR middle-end/42245
        * sel-sched-ir.c (sel_recompute_toporder): New.  Use it...
        (maybe_tidy_empty_bb): ... here.  Make static.  Add new
        argument.  Update all callers.
        (tidy_control_flow): ... and here.  Recompute topological order
        of basic blocks in region if necessary.
        (sel_redirect_edge_and_branch): Change return type.  Return true
        if topological order might have been invalidated.
        (purge_empty_blocks): Export and move from...
        * sel-sched.c (purge_empty_blocks): ... here.
        * sel-sched-ir.h (sel_redirect_edge_and_branch): Update prototype.
        (maybe_tidy_empty_bb): Delete prototype.
        (purge_empty_blocks): Declare.

        * gcc.dg/pr42245.c: New.
        * gcc.dg/pr42245-2.c: New.


Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/sel-sched-ir.c
    trunk/gcc/sel-sched-ir.h
    trunk/gcc/sel-sched.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=42245