[Bug tree-optimization/56490] [4.7/4.8/4.9 Regression] -Wall triggering infinite loop

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56490

--- Comment #9 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Fri Feb 21 09:53:56 2014
New Revision: 207988

URL: http://gcc.gnu.org/viewcvs?rev=207988&root=gcc&view=rev
Log:
    PR tree-optimization/56490
    * params.def (PARAM_UNINIT_CONTROL_DEP_ATTEMPTS): New param.
    * tree-ssa-uninit.c: Include params.h.
    (compute_control_dep_chain): Add num_calls argument, return false
    if it exceed PARAM_UNINIT_CONTROL_DEP_ATTEMPTS param, pass
    num_calls to recursive call.
    (find_predicates): Change dep_chain into normal array,
    cur_chain into auto_vec<edge, MAX_CHAIN_LEN + 1>, add num_calls
    variable and adjust compute_control_dep_chain caller.
    (find_def_preds): Likewise.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/params.def
    trunk/gcc/tree-ssa-uninit.c