[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 #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2010-11-11 
20:33:21 UTC ---
Author: jakub
Date: Thu Nov 11 20:33:18 2010
New Revision: 166615

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166615
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_5-branch/gcc/testsuite/gcc.c-torture/compile/pr46107.c
Modified:
    branches/gcc-4_5-branch/gcc/ChangeLog
    branches/gcc-4_5-branch/gcc/cfgloopmanip.c
    branches/gcc-4_5-branch/gcc/testsuite/ChangeLog