[Bug c/49148] Certain expressions take an extremely long time for no apparent reason

jchthys at yahoo dot com gcc-bugzilla@gcc.gnu.org
Tue May 24 19:16:00 GMT 2011


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49148

John Peyton <jchthys at yahoo dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |missed-optimization

--- Comment #1 from John Peyton <jchthys at yahoo dot com> 2011-05-24 18:56:52 UTC ---
The following command was used to compile and execute the test case:

     gcc gcc_bug.c -O3 -o gcc_bug && ./gcc_bug

Note that -O3 was used. In addition, -lm affects performance minimally if it is
used.



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