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[Bug middle-end/49310] [4.7 Regression] Compile time hog in var-tracking emit
- From: "Joost.VandeVondele at pci dot uzh.ch" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Wed, 8 Jun 2011 07:16:12 +0000
- Subject: [Bug middle-end/49310] [4.7 Regression] Compile time hog in var-tracking emit
- Auto-submitted: auto-generated
- References: <bug-49310-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49310
--- Comment #2 from Joost VandeVondele <Joost.VandeVondele at pci dot uzh.ch> 2011-06-08 07:16:06 UTC ---
the testcase from
http://gcc.gnu.org/bugzilla/attachment.cgi?id=20290
can be used more conveniently. It runs in 1.4s and still spends 50% of time in
var-tracking emit.
Using callgrind, most of the time is in emit_notes_for_changes, calling
htab_traverse.