real.c (real_maxval): New function to return the largest finite value representable in a given mode (i.e.


	* real.c (real_maxval): New function to return the largest finite
	value representable in a given mode (i.e. FLT_MAX and DBL_MAX).
	* real.h (real_maxval): Prototype here.
	* fold-const.c (fold_inf_compare): Transform comparisons against
	+-Infinity into comparisons against DBL_MAX (or equivalent).

	* gcc.c-torture/execute/ieee/inf-2.c: New test case.

From-SVN: r67112