2012-04-16  Kenneth Zadeck <zadeck@naturalbridge.com>

	* builtins.c (get_object_alignment_2, get_pointer_alignment_1,
	c_strlen, c_getstr, target_char_cast,
	expand_builtin_mempcpy_args, expand_builtin_strncpy,
	expand_builtin_memset_args, expand_builtin_strncpy,
	expand_builtin_memset_args, expand_builtin_frame_address,
	expand_builtin_alloca, expand_builtin_atomic_compare_exchange,
	fold_builtin_powi, fold_builtin_memset,
	fold_builtin_memory_op, fold_builtin_memchr,
	fold_builtin_memcmp, fold_builtin_strncmp,
	fold_builtin_load_exponent, fold_builtin_snprintf,
	expand_builtin_object_size, expand_builtin_memory_chk,
	maybe_emit_chk_warning, maybe_emit_sprintf_chk_warning,
	fold_builtin_object_size, fold_builtin_memory_chk,
	fold_builtin_stxcpy_chk, fold_builtin_strcat_chk,
	fold_builtin_sprintf_chk_1, fold_builtin_snprintf_chk_1,
	do_mpfr_bessel_n): Convert to api that does not assume that
	tree_cst is two HWIs.
	(fold_builtin_int_roundingfn, fold_builtin_bitop,
	fold_builtin_bswap, fold_builtin_memory_op,
	expand_builtin_object_size): Use wide-int rather than double-int api.
	
	* dfp.c (decimal_real_to_integer): Add wide-int version. 
	* real.c (real_to_integer): Ditto.
	* tree.h (tree_fits_uhwi_p, tree_fits_shwi_p, tree_fits_hwi_p, 
	tree_to_shwi, tree_to_hwi, tree_to_uhwi): New functions.