[Bug middle-end/12392] very long optimized compile

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=12392

--- Comment #33 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Wed Mar 30 07:47:40 2016
New Revision: 234546

URL: https://gcc.gnu.org/viewcvs?rev=234546&root=gcc&view=rev
Log:
2016-03-30  Michael Matz  <m...@suse.de>
        Richard Biener  <rguent...@suse.de>

        PR ipa/12392
        * ipa-polymorphic-call.c (struct type_change_info): Change
        speculative to an unsigned allowing to limit the work we do.
        (csftc_abort_walking_p): New inline function..
        (check_stmt_for_type_change): Limit the number of may-defs
        skipped for speculative devirtualization to
        max-speculative-devirt-maydefs.
        * params.def (max-speculative-devirt-maydefs): New param.
        * doc/invoke.texi (--param max-speculative-devirt-maydefs): Document.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/doc/invoke.texi
    trunk/gcc/ipa-polymorphic-call.c
    trunk/gcc/params.def