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[Bug ipa/62016] [4.8/4.9 Regression] very slow compilation at -O3 on x86_64-linux-gnu
- From: "rguenth at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: Fri, 16 Jan 2015 09:34:32 +0000
- Subject: [Bug ipa/62016] [4.8/4.9 Regression] very slow compilation at -O3 on x86_64-linux-gnu
- Auto-submitted: auto-generated
- References: <bug-62016-4 at http dot gcc dot gnu dot org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62016
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Known to work| |5.0
Summary|[4.8/4.9/5 Regression] very |[4.8/4.9 Regression] very
|slow compilation at -O3 on |slow compilation at -O3 on
|x86_64-linux-gnu |x86_64-linux-gnu
Known to fail| |4.8.3, 4.9.2
--- Comment #10 from Richard Biener <rguenth at gcc dot gnu.org> ---
Yep.
> /usr/bin/time gcc-4.7 t.c -O3
0.10user 0.02system 0:00.62elapsed 21%CPU (0avgtext+0avgdata 15704maxresident)k
26080inputs+48outputs (113major+9177minor)pagefaults 0swaps
> /usr/bin/time gcc-4.8 t.c -O3
^C
0.00user 0.00system 6:11.40elapsed 0%CPU (0avgtext+0avgdata 1136maxresident)k
1440inputs+0outputs (7major+331minor)pagefaults 0swaps
> /usr/bin/time gcc-4.9 t.c -O3
3.13user 0.18system 0:03.84elapsed 86%CPU (0avgtext+0avgdata
404088maxresident)k
28400inputs+48outputs (128major+137978minor)pagefaults 0swaps
> /usr/bin/time /space/rguenther/install/gcc-5.0/bin/gcc t.c -O3
0.04user 0.01system 0:00.28elapsed 20%CPU (0avgtext+0avgdata 13364maxresident)k
6376inputs+48outputs (17major+8570minor)pagefaults 0swaps