[Bug rtl-optimization/47420] [4.6 regression] ICE: in calc_dfs_tree, at dominance.c:395 with c++ code for mingw

[silver24k at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47420

--- Comment #8 from Yu Simin <silver24k at gmail dot com> 2011-02-06 20:40:34 
UTC ---
I used git-bisect and found it is caused by r166555.

Author: hubicka
Date: Wed Nov 10 20:23:09 2010
New Revision: 166555

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=166555
Log:
    PR tree-optimize/46228
    * doc/invoke.texi (comdat-sharing-probability): Document.
    * ipa-inline.c (cgraph_estimate_growth): Handle COMDATs
    * params.def (PARAM_COMDAT_SHARING_PROBABILITY): New param.
    * g++.dg/tree-ssa/pr46228.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/tree-ssa/pr46228.C
Modified:
    trunk/gcc/doc/invoke.texi
    trunk/gcc/ipa-inline.c
    trunk/gcc/params.def
    trunk/gcc/testsuite/ChangeLog