re PR debug/11983 (ICE in dwarf-2 on code using altivec)

re PR debug/11983 (ICE in dwarf-2 on code using altivec)

	PR debug/11983
	* dwarf2out.c (enum dw_val_class): Rename dw_val_class_float to
	dw_val_class_vec.  Replace use throughout file.
	(dw_float_const): Delete.
	(dw_vec_const): New.
	(dw_val_struct_union): Rename val_float to val_vec.  Replace use
	throughout file.
	(add_AT_vec): Rename from add_AT_float.  Add elt_size param.
	(same_dw_val_p): Adjust vec comparison.  Use memcmp.
	(size_of_die): Adjust dw_val_class_vec sizing.
	(output_die): Output dw_val_class_vec.
	(insert_int, extract_int, insert_float): New functions.
	(add_const_value_attribute): Use insert_float for CONST_DOUBLE.
	Handle CONST_VECTOR.
	(add_location_or_const_value_attribute): Handle CONST_VECTOR.

From-SVN: r79077