[Bug middle-end/89150] [9 regression] Tree form bitmaps break GC

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89150

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Author: rguenth
Date: Tue Feb  5 08:32:16 2019
New Revision: 268530

URL: https://gcc.gnu.org/viewcvs?rev=268530&root=gcc&view=rev
Log:
2019-02-05  Richard Biener  <rguent...@suse.de>

        PR middle-end/89150
        * bitmap.h (struct bitmap_obstack): Do not mark GTY.
        (struct bitmap_element): Drop chain_prev so we properly recurse on
        the prev member, supporting tree views.
        (struct bitmap_head): GTY skip the obstack member.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/bitmap.h