[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

Richard Biener <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |rguenth at gcc dot gnu.org
   Target Milestone|---                         |9.0

--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
IIRC there are no tree-view GC allocated bitmaps yet.  One option would be
to only keep chain_next ("%h.next") which would handle walking next w/o
recursion but recurse on prev.

So not sure why this is a regression since tree form didn't exist before
and the issue might only become appearant when tree view bitmaps start
to be GC allocated?