[Bug tree-optimization/46183] [4.6 Regression] ICE: in calc_dfs_tree, at dominance.c:396 with -O -fno-dse -fgcse -ftree-pre

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=46183

--- Comment #9 from Richard Guenther <rguenth at gcc dot gnu.org> 2010-11-04 
15:19:24 UTC ---
Author: rguenth
Date: Thu Nov  4 15:19:19 2010
New Revision: 166316

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166316
Log:
2010-11-04  Richard Guenther  <rguent...@suse.de>

    PR rtl-optimization/46183
    * gcse.c (execute_rtl_cprop): Cleanup the CFG if something changed.
    (execute_rtl_pre): Likewise.
    (execute_rtl_hoist): Likewise.

    * gcc.dg/torture/pr46183.c: New testcase.

Added:
    trunk/gcc/testsuite/gcc.dg/torture/pr46183.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/gcse.c
    trunk/gcc/testsuite/ChangeLog