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[Bug middle-end/54896] optimization slowness on large basic blocks
- From: "steven at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Tue, 12 Mar 2013 18:23:29 +0000
- Subject: [Bug middle-end/54896] optimization slowness on large basic blocks
- Auto-submitted: auto-generated
- References: <bug-54896-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54896
--- Comment #8 from Steven Bosscher <steven at gcc dot gnu.org> 2013-03-12 18:23:29 UTC ---
With r196576 on x86_64 (gcc17):
at -O1:
alias stmt walking : 30.99 (36%) usr
reload CSE regs : 18.94 (22%) usr
CSE : 14.94 (17%) usr
tree DSE : 9.32 (11%) usr
at -O2:
alias stmt walking : 46.65 (30%) usr
reload CSE regs : 37.92 (25%) usr
CSE 2 : 29.09 (19%) usr
CSE : 15.02 (10%) usr
at -O3:
tree slp vectorization : 129.79 (61%) usr
alias stmt walking : 46.52 (22%) usr