Use INTVAL only on CONST_INT in addptrdi3 and addptrsi3

2014-06-04  Tom de Vries  <tom@codesourcery.com>

	* config/s390/s390.md ("addptrdi3", "addptrsi3"): Use INTVAL only on
	CONST_INT.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@211246 138bc75d-0d04-0410-961f-82ee72b054a4