[Bug ipa/65478] [5 regression] crafty performance regression

[hubicka at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65478

--- Comment #14 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Author: hubicka
Date: Sun Mar 29 15:38:52 2015
New Revision: 221763

URL: https://gcc.gnu.org/viewcvs?rev=221763&root=gcc&view=rev
Log:

    PR ipa/65478
    * params.def (PARAM_IPA_CP_RECURSION_PENALTY) : New.
    (PARAM_IPA_CP_SINGLE_CALL_PENALTY): Likewise.
    * ipa-prop.h (ipa_node_params): New flags node_within_scc and
    node_calling_single_call.
    * ipa-cp.c (count_callers): New function.
    (set_single_call_flag): Likewise.
    (initialize_node_lattices): Count callers and set single_flag_call if
    necessary.
    (incorporate_penalties): New function.
    (good_cloning_opportunity_p): Use it, dump new flags.
    (propagate_constants_topo): Set node_within_scc flag if appropriate.
    * doc/invoke.texi (ipa-cp-recursion-penalty,
    ipa-cp-single-call-pentalty): Document.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/doc/invoke.texi
    trunk/gcc/ipa-cp.c
    trunk/gcc/ipa-prop.h
    trunk/gcc/params.def