re PR fortran/47659 (-Wconversion[-extra] should emit warning for constant expressions)

re PR fortran/47659 (-Wconversion[-extra] should emit warning for constant expressions)

2011-08-21  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/47659
	* expr.c (gfc_check_assign): Check for type conversions when the
	right-hand side is a constant REAL/COMPLEX contstant the left-hand
	side is also REAL/COMPLEX.  Don't warn when a narrowing conversion
	for REAL does not change the value of the constant.

2011-08-21  Thomas Koenig  <tkoenig@gcc.gnu.org>

	PR fortran/47659
	* gfortran.dg/warn_conversion_2.f90:  Also warn about conversion
	of a constant resulting from simplification.
	* gfortran.dg/warn_conversion_3.f90:  New test.

From-SVN: r177942