[Bug other/55793] Compile hog with -gdwarf-4 and -O2 (-fvar-tracking issue)

[jan.smets@alcatel-lucent.com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55793

--- Comment #1 from Jan Smets <jan.smets@alcatel-lucent.com> 2012-12-22 20:44:32 UTC ---
85%+ of the time is spent in "var-tracking dataflow". This may just be a
duplicate of #54402 but the testcase there is different.