[PATCH] PR fortran/86045 -- test for P=0 in mod(, 0)

[Steve Kargl]

The attached patch re-arranges the code in gfc_simply_mod().
This allows gfortran to test if the 2nd argument is zero.
Tested on i586-*-freebsd and x86_64-*-freebsd.  OK to commit?

2018-06-04  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/86045
	* simplify.c (gfc_simplify_mod): Re-arrange code to test whether
	'P' is zero and issue an error if it is.

2018-06-04  Steven G. Kargl  <kargl@gcc.gnu.org>

	PR fortran/86045
	* gfortran.dg/pr86045.f90: New test.

-- 
Steve
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