[Bug tree-optimization/47615] [4.6 Regression] ICE: too deep recursion in phi_translate/phi_translate_1 with -ftree-pre -fno-tree-fre -fno-tree-sra

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47615

--- Comment #4 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-02-07 
16:58:20 UTC ---
Author: rguenth
Date: Mon Feb  7 16:58:17 2011
New Revision: 169888

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=169888
Log:
2011-02-07  Richard Guenther  <rguent...@suse.de>

    PR tree-optimization/47615
    * tree-ssa-sccvn.h (run_scc_vn): Take a vn-walk mode argument.
    * tree-ssa-sccvn.c (default_vn_walk_kind): New global.
    (run_scc_vn): Initialize it.
    (visit_reference_op_load): Use it.
    * tree-ssa-pre.c (execute_pre): Use VN_WALK if in PRE.

    * g++.dg/opt/pr47615.C: New testcase.

Added:
    trunk/gcc/testsuite/g++.dg/opt/pr47615.C
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/testsuite/ChangeLog
    trunk/gcc/tree-ssa-pre.c
    trunk/gcc/tree-ssa-sccvn.c
    trunk/gcc/tree-ssa-sccvn.h