[Bug middle-end/49310] [4.7 Regression] Compile time hog in var-tracking emit

[jakub at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49310

--- Comment #6 from Jakub Jelinek <jakub at gcc dot gnu.org> 2011-06-08 13:38:51 UTC ---
Or alternatively make it more dynamic, like if in one function the maximum
level is reached or almost reached (so it could be checked only in
vt_expand_loc_callback) more than some parameter times (like several millions
or so), it would temporarily drop down the limit to a lower value.
It would probably need to recheck all var locations at that spot though,
because
dummy and real expansion should match.