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[Bug c/38518] Excessive compile time with -O3
- From: "hjl dot tools at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Dec 2008 19:50:44 -0000
- Subject: [Bug c/38518] Excessive compile time with -O3
- References: <bug-38518-9596@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #2 from hjl dot tools at gmail dot com 2008-12-13 19:50 -------
On 2.66GHz Cor2 Quad running Fedora 9/x86-64, gcc 4.4 revision 142740 gave:
lake:pts/1[9]> time ./xgcc -B./ -O3 /tmp/bug48.c -S
./xgcc -B./ -O3 /tmp/bug48.c -S 94.39s user 0.98s system 99% cpu 1:35.51 total
lake:pts/1[10]> time ./xgcc -B./ -O2 /tmp/bug48.c -S
./xgcc -B./ -O2 /tmp/bug48.c -S 11.66s user 0.22s system 99% cpu 11.877 total
lake:pts/1[11]> time ./xgcc -B./ -O2 /tmp/bug48.c -S -ftree-vectorize
./xgcc -B./ -O2 /tmp/bug48.c -S -ftree-vectorize 61.16s user 0.73s system 99%
cpu 1:01.92 total
--
hjl dot tools at gmail dot com changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hjl dot tools at gmail dot
| |com
Status|UNCONFIRMED |RESOLVED
Resolution| |WORKSFORME
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38518