[Bug tree-optimization/46107] [4.6 Regression] -ftree-loop-distribute-patterns caused verify_loop_structure problem

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46107

--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-12 
11:28:35 UTC ---
Author: jakub
Date: Fri Nov 12 11:28:32 2010
New Revision: 166649

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166649
Log:
    Backport from mainline
    2010-11-03  Jakub Jelinek  <ja...@redhat.com>

    PR tree-optimization/46107
    * cfgloopmanip.c (loop_version): Set irred_flag back into entry->flags
    if cfg_hook_duplicate_loop_to_header_edge failed.

    * gcc.c-torture/compile/pr46107.c: New test.

Added:
    branches/gcc-4_4-branch/gcc/testsuite/gcc.c-torture/compile/pr46107.c
Modified:
    branches/gcc-4_4-branch/gcc/ChangeLog
    branches/gcc-4_4-branch/gcc/cfgloopmanip.c
    branches/gcc-4_4-branch/gcc/gimplify.c
    branches/gcc-4_4-branch/gcc/testsuite/ChangeLog