[Bug ipa/65076] [5 Regression] 16% tramp3d-v4.cpp compile time regression

["hubicka at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65076

--- Comment #42 from Jan Hubicka <hubicka at gcc dot gnu.org> ---
Sorry, accidental message.

It is 69->80.5s between 141127.61083 and 150113.26056 (tester was down)
      66->69s between 141123.15275 and 141124.01653
      60->64 between 140807.80282 and 140808.66762

Now the other tester shows 
      59->50 between 150112.41636 and 150113.13858
      51->53 between 141124.14999 and 141123.43031
      45->48 between 140807.01584 and 140808.72560

Can we, please, restart the frescobaldi tester? It is down sine 23rd.

There is an inline change
2015-01-12  Jan Hubicka  <hubicka@ucw.cz>

        PR ipa/63967
        PR ipa/64425
        * ipa-inline.c (compute_uninlined_call_time,
        compute_inlined_call_time): Use counts for extra precision when
        needed possible.
        (big_speedup_p): Fix formating.
        (RELATIVE_TIME_BENEFIT_RANGE): Remove.
        (relative_time_benefit): Remove.
        (edge_badness): Turn DECL_DISREGARD_INLINE_LIMITS into hint;
        merge guessed and read profile paths.
        (inline_small_functions): Count only !optimize_size functions into
        initial size; be more lax about sanity check when profile is used;
        be sure to update inlined function profile when profile is read.

2015-01-12  Jan Hubicka  <hubicka@ucw.cz>

        PR ipa/63470
        * ipa-inline-analysis.c (inline_edge_duplication_hook): Adjust
        cost when edge becomes direct.
        * ipa-prop.c (make_edge_direct): Do not adjust when speculation
        is resolved or when introducing new speculation.

2014-11-22  Jan Hubicka  <hubicka@ucw.cz>

        PR ipa/63671
        * ipa-inline-transform.c (can_remove_node_now_p_1): Handle alises
        and -fno-devirtualize more carefully.
        (can_remove_node_now_p): Update.

(it really is 24th)

2014-08-07  Jan Hubicka  <hubicka@ucw.cz>

        * ipa-devirt.c: Include gimple-pretty-print.h
        (referenced_from_vtable_p): Exclude DECL_EXTERNAL from
        further tests.
        (decl_maybe_in_construction_p): Fix conditional on cdtor check
        (get_polymorphic_call_info): Fix return value
        (type_change_info): New sturcture based on ipa-prop
        variant.
        (noncall_stmt_may_be_vtbl_ptr_store): New predicate
        based on ipa-prop variant.
        (extr_type_from_vtbl_ptr_store): New function
        based on ipa-prop variant.
        (record_known_type): New function.
        (check_stmt_for_type_change): New function.
        (get_dynamic_type): New function.
        * ipa-prop.c (ipa_analyze_call_uses): Use get_dynamic_type.
        * tree-ssa-pre.c: ipa-utils.h
        (eliminate_dom_walker::before_dom_children): Use ipa-devirt
        machinery; sanity check with ipa-prop devirtualization.
        * trans-mem.c (ipa_tm_insert_gettmclone_call): Clear
        polymorphic flag.

Last one is ipa-cp change or perhaps get_dynamic_type is expensive (it has some
chance for that). I will add timevar for it.

The first two changes are not what I would expect. Perhaps checking these is a
good idea.  It may be something else comitted the same day.