[Bug libfortran/30780] cpu_time produces a floating point exception when used with -O0

[kargl at gcc dot gnu dot org]

------- Comment #6 from kargl at gcc dot gnu dot org  2007-02-13 06:41 -------
(In reply to comment #5)

> The exception is occurring in the print statement. Nothing to do with time.
> 

No, there is a "problem" in cpu_time.  -ffpe-trap='precision' is
trapping on lost precision.  On x86_64, long is 64-bit and 
GFC_REAL_4 is 32-bit with only 24-bits of precision.  You can't
convert long to GFC_REAL_4 without loss of precision.  In short,
using this option is probably not a good idea if you have mixed
mode math.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30780