* dwarf2out.c (loc_descriptor): For SYMBOL_REFs and LABEL_REFs

	* dwarf2out.c (loc_descriptor): For SYMBOL_REFs and LABEL_REFs
	use DW_OP_addr+DW_OP_stack_value instead of DW_OP_implicit_value.
	(add_const_value_attribute): For CONST_STRING, SYMBOL_REFs and
	LABEL_REFs use DW_OP_addr+DW_OP_stack_value DW_AT_location instead of
	DW_AT_const_value.

	* gcc.dg/debug/dwarf2/const-1.c: Don't expect DW_AT_const_value,
	but instead DW_AT_location with DW_OP_addr+DW_OP_stack_value.  Add
	-gno-strict-dwarf -fno-merge-debug-strings to dg-options.
	* g++.dg/debug/dwarf2/const1.C: Likewise.
	* g++.dg/debug/dwarf2/template-params-3.C: Likewise.
	* g++.dg/debug/dwarf2/template-func-params-3.C: Likewise.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@155327 138bc75d-0d04-0410-961f-82ee72b054a4