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[Bug bootstrap/52391] [4.7 regression] genattrtab almost 5X slower for m68k than in 4.6 and earlier releases
- From: "mikpe at it dot uu.se" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Mon, 27 Feb 2012 23:03:00 +0000
- Subject: [Bug bootstrap/52391] [4.7 regression] genattrtab almost 5X slower for m68k than in 4.6 and earlier releases
- Auto-submitted: auto-generated
- References: <bug-52391-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52391
--- Comment #6 from Mikael Pettersson <mikpe at it dot uu.se> 2012-02-27 23:03:00 UTC ---
Top-most lines from gprof profile of genattrtab @ r178388:
Flat profile:
Each sample counts as 0.01 seconds.
% cumulative self self total
time seconds seconds calls s/call s/call name
67.71 437.11 437.11 138244364 0.00 0.00 simplify_and_tree
22.16 580.15 143.04 532054774 0.00 0.00 attr_equal_p
6.49 622.06 41.91 1753529513 0.00 0.00 rtx_equal_p
2.23 636.47 14.41 78398171 0.00 0.00 simplify_or_tree
0.99 642.88 6.41 2169340 0.00 0.00 simplify_test_exp
0.24 644.41 1.53 15087810 0.00 0.00 compute_alternative_mask
0.12 645.20 0.79 2105645 0.00 0.00 attr_rtx