https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114855

--- Comment #34 from Andrew Macleod <amacleod at redhat dot com> ---
Btw, if we simply remove the call to that function, with -O1
-fenable-tree-thread1 I see:

 backwards jump threading           :  14.36 (  3%)   0.39 (  5%)  14.68 (  3%)
  238M (  9%)

which is a notable improvement from 1370 seconds :-P   SO clearly the culprit.

DOM appears to still be somewhat of an issue..  Ive done some experimenting in
this area, but nothing IM willing to commit to yet.  Do you have anything
outstanding for this Aldy?

dominator optimization             : 208.04 ( 43%)   0.95 ( 12%) 209.77 ( 43%) 
 342M ( 13%)

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