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[Bug libfortran/30780] cpu_time produces a floating point exception when used with -O0
- From: "jvdelisle at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>
- To: gcc-bugs at gcc dot gnu dot org
- Date: 13 Feb 2007 05:41:40 -0000
- Subject: [Bug libfortran/30780] cpu_time produces a floating point exception when used with -O0
- References: <bug-30780-14089@http.gcc.gnu.org/bugzilla/>
- Reply-to: gcc-bugzilla at gcc dot gnu dot org
------- Comment #5 from jvdelisle at gcc dot gnu dot org 2007-02-13 05:41 -------
I modified cpu_time_4 to just return some dummy values, and experimented a bit
with the test case. When I commented out the print statement, the exception
went away.
Here is a reduced test case.
program test2
real :: dog
dog = 1.0
print *, dog
end program test2
The exception is occurring in the print statement. Nothing to do with time.
(gdb) r
Starting program: /home/jerry/prs/pr30780/a.out
Program received signal SIGFPE, Arithmetic exception.
0x00002aaaaab2c3d9 in write_float (dtp=0x7fff52698b00, f=0x7fff52698a50,
source=<value optimized out>, len=<value optimized out>)
at ../../../gcc43/libgfortran/io/write.c:366
366 if ((m > 0.0 && m < 0.1 - 0.05 / exp_d) || (m >= exp_d - 0.5 ) ||
--
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30780