Convert lvalue reference type check to general reference type check

In almost all contexts (except for overload resolution rules and expression
semantics), lvalue and rvalue references are equivalent. That means that in all
but these cases we can replace a TYPE_CODE_REF check to a TYPE_IS_REFERENCE
check and, for switch statements, add a case label for a rvalue reference type
next to a case label for an lvalue reference type. This patch does exactly
that.

gdb/ChangeLog

	PR gdb/14441
	* aarch64-tdep.c (aarch64_type_align)
	(aarch64_extract_return_value, aarch64_store_return_value): Change
	lvalue reference type checks to general reference type checks.
	* amd64-tdep.c (amd64_classify): Likewise.
	* amd64-windows-tdep.c (amd64_windows_passed_by_integer_register):
	Likewise.
	* arm-tdep.c (arm_type_align, arm_extract_return_value)
	(arm_store_return_value): Likewise.
	* ax-gdb.c (gen_fetch, gen_cast): Likewise.
	* c-typeprint.c (c_print_type): Likewise.
	* c-varobj.c (adjust_value_for_child_access, c_value_of_variable)
	(cplus_number_of_children, cplus_describe_child): Likewise.
	* compile/compile-c-symbols.c (generate_vla_size): Likewise.
	* completer.c (expression_completer): Likewise.
	* cp-support.c (make_symbol_overload_list_adl_namespace):
	Likewise.
	* darwin-nat-info.c (info_mach_region_command): Likewise.
	* dwarf2loc.c (entry_data_value_coerce_ref)
	(value_of_dwarf_reg_entry): Likewise.
	* eval.c (ptrmath_type_p, evaluate_subexp_standard)
	(evaluate_subexp_for_address, evaluate_subexp_for_sizeof):
	Likewise.
	* findvar.c (extract_typed_address, store_typed_address):
	Likewise.
	* gdbtypes.c (rank_one_type): Likewise.
	* hppa-tdep.c (hppa64_integral_or_pointer_p): Likewise.
	* infcall.c (value_arg_coerce): Likewise.
	* language.c (pointer_type): Likewise.
	* m32c-tdep.c (m32c_reg_arg_type, m32c_m16c_address_to_pointer):
	Likewise.
	* m88k-tdep.c (m88k_integral_or_pointer_p): Likewise.
	* mn10300-tdep.c (mn10300_type_align): Likewise.
	* msp430-tdep.c (msp430_push_dummy_call): Likewise.
	* ppc-sysv-tdep.c (do_ppc_sysv_return_value)
	(ppc64_sysv_abi_push_param, ppc64_sysv_abi_return_value):
	Likewise.
	* printcmd.c (print_formatted, x_command): Likewise.
	* python/py-type.c (typy_get_composite, typy_template_argument):
	Likewise.
	* python/py-value.c (valpy_referenced_value)
	(valpy_get_dynamic_type, value_has_field): Likewise.
	* s390-linux-tdep.c (s390_function_arg_integer): Likewise.
	* sparc-tdep.c (sparc_integral_or_pointer_p): Likewise.
	* sparc64-tdep.c (sparc64_integral_or_pointer_p): Likewise.
	* spu-tdep.c (spu_scalar_value_p): Likewise.
	* symtab.c (lookup_symbol_aux): Likewise.
	* typeprint.c (whatis_exp, print_type_scalar): Likewise.
	* valarith.c (binop_types_user_defined_p, unop_user_defined_p):
	Likewise.
	* valops.c (value_cast_pointers, value_cast)
	(value_reinterpret_cast, value_dynamic_cast, value_addr, typecmp)
	(value_struct_elt, value_struct_elt_bitpos)
	(value_find_oload_method_list, find_overload_match)
	(value_rtti_indirect_type): Likewise.
	* valprint.c (val_print_scalar_type_p, generic_val_print):
	Likewise.
	* value.c (value_actual_type, value_as_address, unpack_long)
	(pack_long, pack_unsigned_long, coerce_ref_if_computed)
	(coerce_ref): Likewise.
	* varobj.c (varobj_get_value_type): Likewise.

1 files changed, 3 insertions, 2 deletions

diff --git a/gdb/valprint.c b/gdb/valprint.c
index 529f9a5058..6937dab7c6 100644
--- a/gdb/valprint.c
+++ b/gdb/valprint.c
@@ -281,7 +281,7 @@ int
 val_print_scalar_type_p (struct type *type)
 {
   type = check_typedef (type);
-  while (TYPE_CODE (type) == TYPE_CODE_REF)
+  while (TYPE_IS_REFERENCE (type))
     {
       type = TYPE_TARGET_TYPE (type);
       type = check_typedef (type);
@@ -536,7 +536,7 @@ get_value_addr_contents (struct value *deref_val)
     }
 }
 
-/* generic_val_print helper for TYPE_CODE_REF.  */
+/* generic_val_print helper for TYPE_CODE_{RVALUE_,}REF.  */
 
 static void
 generic_val_print_ref (struct type *type,
@@ -960,6 +960,7 @@ generic_val_print (struct type *type,
       break;
 
     case TYPE_CODE_REF:
+    case TYPE_CODE_RVALUE_REF:
       generic_val_print_ref (type, embedded_offset, stream, recurse,
 			     original_value, options);
       break;