------- Comment #12 from rob1weld at aol dot com 2009-01-28 03:54 ------- On the Trunk using "-O2" or "-O3" can produce slower code.
I built gcc version 4.4.0 20090126 [trunk revision 143680] for i386-redhat-linux and was dismayed to find that libmudflaps had a few FAILs: Results for 4.4.0 20090126 (experimental) [trunk revision 143680] (GCC) testsuite on i386-redhat-linux-gnu http://gcc.gnu.org/ml/gcc-testresults/2009-01/msg02853.html The file "libmudflap.cth/pass40-frag.c" fails with NO optimization due to: 6100 6200 WARNING: program timed out. FAIL: libmudflap.cth/pass40-frag.c output pattern test Since it is only completing 62% of it's task the timeout needs an appropriate increase. The file "libmudflap.cth/pass40-frag.c" fails with "-O2" due to: 4100 4200 4300 4400 4500 4600 4700 4800 4900 WARNING: program timed out. FAIL: libmudflap.cth/pass40-frag.c (-O2) output pattern test With "-O2" it only completes 49% (slower than default). The file "libmudflap.cth/pass40-frag.c" fails with "-O3" due to: 5100 5200 5300 5400 5500 5600 5700 5800 WARNING: program timed out. FAIL: libmudflap.cth/pass40-frag.c (-O3) output pattern test With "-O3" it only completes 58% (slower than default, but faster than "-O2"). Rob -- http://gcc.gnu.org/bugzilla/show_bug.cgi?id=34163
