PR target/27829

	* arm.c (arm_print_operand case 'S'): Validate that the operand is
	a shift operand before calling shift_op.  Avoid redundant call of
	shift_op.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@114265 138bc75d-0d04-0410-961f-82ee72b054a4