[Bug rtl-optimization/27735] [4.2 Regression] ICE at -O3 caused by loop unswitching

[rakdver at gcc dot gnu dot org]

------- Comment #8 from rakdver at gcc dot gnu dot org  2006-08-30 08:14 -------
Subject: Bug 27735

Author: rakdver
Date: Wed Aug 30 08:14:29 2006
New Revision: 116582

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=116582
Log:
        PR rtl-optimization/27735
        * cfgloopmanip.c (fix_loop_placements, fix_bb_placements, unloop):
        Add new argument to keep track of whether an irreducible region
        was affected.  All callers changed.
        (fix_irreducible_loops): Removed.
        (remove_path): Call mark_irreducible_loops if EDGE_IRREDUCIBLE_LOOP
        flags were invalidated.

        * gcc.dg/loop-unswitch-1.c: New test.


Added:
    trunk/gcc/testsuite/gcc.dg/loop-unswitch-1.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/cfgloopmanip.c
    trunk/gcc/testsuite/ChangeLog


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=27735