[Bug fortran/30834] ICE with kind=8 exponentiaton

["fxcoudert at gcc dot gnu dot org" <gcc-bugzilla at gcc dot gnu dot org>]

------- Comment #9 from fxcoudert at gcc dot gnu dot org  2007-03-17 18:45 -------
Created an attachment (id=13222)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=13222&action=view)
Proposed patch

I think the attached patch would fix this bug. It's a significant rewrite of
the arith.c code to:
  * handle the case of large integer exponents for both complex and real; I do
it by not extracting an int from the exponent, but simply handle the mpz_t
throughout
  * rewrite completely the integer**integer case, because it had other
problems, such as the following:

$ cat c.f90 
  print *, 0**(-1)
  end
$ gfortran c.f90
c.f90:0: internal compiler error: Floating point exception

All testcases reported are fixed. I don't have any more time to work on this
now, if one of you want to try the patch on the corner cases you can imagine,
I'd appreciate that.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30834