[PATCHv2 02/10] Use type_instance_flags more throughout

[Andrew Burgess <andrew.burgess@embecosm.com>]

From: Pedro Alves <pedro@palves.net>

The next patch in this series will rewrites enum_flags fixing some API
holes.  That would cause build failures around code using
type_instance_flags.  Or rather, that should be using it, but wasn't.

This patch fixes it by using type_instance_flags throughout instead of
plain integers.

Note that we can't make the seemingly obvious change to struct
type::instance_flags:

 -  unsigned instance_flags : 9;
 +  ENUM_BITFIELD (type_instance_flag_value) instance_flags : 9;

Because G++ complains then that 9 bits isn't sufficient for holding
all values of type_instance_flag_value.

So the patch adds a cast to TYPE_INSTANCE_FLAGS, and adds a separate
SET_TYPE_INSTANCE_FLAGS macro.

gdb/ChangeLog:

	* dwarf2/read.c (read_tag_pointer_type): Use type_instance_flags.
	* eval.c (fake_method::fake_method): Use SET_TYPE_INSTANCE_FLAGS.
	* gdbarch.h, gdbarch.c: Regenerate.
	* gdbarch.sh (address_class_type_flags): Use type_instance_flags.
	(address_class_name_to_type_flags): Use type_instance_flags and
	bool.
	* gdbtypes.c (address_space_name_to_int)
	(address_space_int_to_name, make_qualified_type): Use
	type_instance_flags.
	(make_qualified_type): Use type_instance_flags and
	SET_TYPE_INSTANCE_FLAGS.
	(make_type_with_address_space, make_cv_type, make_vector_type)
	(check_typedef): Use type_instance_flags.
	(recursive_dump_type): Cast type_instance_flags to unsigned for
	printing.
	(copy_type_recursive): Use SET_TYPE_INSTANCE_FLAGS.
	* gdbtypes.h (TYPE_INSTANCE_FLAGS): Return a type_instance_flags.
	(SET_TYPE_INSTANCE_FLAGS): New.
	(address_space_name_to_int, address_space_int_to_name)
	(make_type_with_address_space): Pass flags using
	type_instance_flags instead of int.
	* stabsread.c (cleanup_undefined_types_noname): Use
	SET_TYPE_INSTANCE_FLAGS.
	* type-stack.c (type_stack::follow_types): Use type_instance_flags.
---
 gdb/dwarf2/read.c |  7 +++---
 gdb/eval.c        |  2 +-
 gdb/gdbarch.c     |  6 ++---
 gdb/gdbarch.h     | 12 +++++-----
 gdb/gdbarch.sh    |  8 +++----
 gdb/gdbtypes.c    | 58 ++++++++++++++++++++++++++---------------------
 gdb/gdbtypes.h    | 15 ++++++++----
 gdb/stabsread.c   |  2 +-
 gdb/type-stack.c  |  4 ++--
 9 files changed, 62 insertions(+), 52 deletions(-)

diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 0ac8533263a..4ced5ac02bf 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -17292,10 +17292,9 @@ read_tag_pointer_type (struct die_info *die, struct dwarf2_cu *cu)
     {
       if (gdbarch_address_class_type_flags_p (gdbarch))
 	{
-	  int type_flags;
-
-	  type_flags = gdbarch_address_class_type_flags
-			 (gdbarch, byte_size, addr_class);
+	  type_instance_flags type_flags
+	    = gdbarch_address_class_type_flags (gdbarch, byte_size,
+						addr_class);
 	  gdb_assert ((type_flags & ~TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL)
 		      == 0);
 	  type = make_type_with_address_space (type, type_flags);
diff --git a/gdb/eval.c b/gdb/eval.c
index c62c35f3183..cd300ddfef6 100644
--- a/gdb/eval.c
+++ b/gdb/eval.c
@@ -659,7 +659,7 @@ fake_method::fake_method (type_instance_flags flags,
   TYPE_LENGTH (type) = 1;
   type->set_code (TYPE_CODE_METHOD);
   TYPE_CHAIN (type) = type;
-  TYPE_INSTANCE_FLAGS (type) = flags;
+  SET_TYPE_INSTANCE_FLAGS (type, flags);
   if (num_types > 0)
     {
       if (param_types[num_types - 1] == NULL)
diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c
index f8fe03ca682..2be959ecfc9 100644
--- a/gdb/gdbarch.c
+++ b/gdb/gdbarch.c
@@ -3501,7 +3501,7 @@ gdbarch_address_class_type_flags_p (struct gdbarch *gdbarch)
   return gdbarch->address_class_type_flags != NULL;
 }
 
-int
+type_instance_flags
 gdbarch_address_class_type_flags (struct gdbarch *gdbarch, int byte_size, int dwarf2_addr_class)
 {
   gdb_assert (gdbarch != NULL);
@@ -3566,8 +3566,8 @@ gdbarch_address_class_name_to_type_flags_p (struct gdbarch *gdbarch)
   return gdbarch->address_class_name_to_type_flags != NULL;
 }
 
-int
-gdbarch_address_class_name_to_type_flags (struct gdbarch *gdbarch, const char *name, int *type_flags_ptr)
+bool
+gdbarch_address_class_name_to_type_flags (struct gdbarch *gdbarch, const char *name, type_instance_flags *type_flags_ptr)
 {
   gdb_assert (gdbarch != NULL);
   gdb_assert (gdbarch->address_class_name_to_type_flags != NULL);
diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h
index 7a3060e628d..8a4a384fda9 100644
--- a/gdb/gdbarch.h
+++ b/gdb/gdbarch.h
@@ -848,8 +848,8 @@ extern void set_gdbarch_have_nonsteppable_watchpoint (struct gdbarch *gdbarch, i
 
 extern int gdbarch_address_class_type_flags_p (struct gdbarch *gdbarch);
 
-typedef int (gdbarch_address_class_type_flags_ftype) (int byte_size, int dwarf2_addr_class);
-extern int gdbarch_address_class_type_flags (struct gdbarch *gdbarch, int byte_size, int dwarf2_addr_class);
+typedef type_instance_flags (gdbarch_address_class_type_flags_ftype) (int byte_size, int dwarf2_addr_class);
+extern type_instance_flags gdbarch_address_class_type_flags (struct gdbarch *gdbarch, int byte_size, int dwarf2_addr_class);
 extern void set_gdbarch_address_class_type_flags (struct gdbarch *gdbarch, gdbarch_address_class_type_flags_ftype *address_class_type_flags);
 
 extern int gdbarch_address_class_type_flags_to_name_p (struct gdbarch *gdbarch);
@@ -866,13 +866,13 @@ extern bool gdbarch_execute_dwarf_cfa_vendor_op (struct gdbarch *gdbarch, gdb_by
 extern void set_gdbarch_execute_dwarf_cfa_vendor_op (struct gdbarch *gdbarch, gdbarch_execute_dwarf_cfa_vendor_op_ftype *execute_dwarf_cfa_vendor_op);
 
 /* Return the appropriate type_flags for the supplied address class.
-   This function should return 1 if the address class was recognized and
-   type_flags was set, zero otherwise. */
+   This function should return true if the address class was recognized and
+   type_flags was set, false otherwise. */
 
 extern int gdbarch_address_class_name_to_type_flags_p (struct gdbarch *gdbarch);
 
-typedef int (gdbarch_address_class_name_to_type_flags_ftype) (struct gdbarch *gdbarch, const char *name, int *type_flags_ptr);
-extern int gdbarch_address_class_name_to_type_flags (struct gdbarch *gdbarch, const char *name, int *type_flags_ptr);
+typedef bool (gdbarch_address_class_name_to_type_flags_ftype) (struct gdbarch *gdbarch, const char *name, type_instance_flags *type_flags_ptr);
+extern bool gdbarch_address_class_name_to_type_flags (struct gdbarch *gdbarch, const char *name, type_instance_flags *type_flags_ptr);
 extern void set_gdbarch_address_class_name_to_type_flags (struct gdbarch *gdbarch, gdbarch_address_class_name_to_type_flags_ftype *address_class_name_to_type_flags);
 
 /* Is a register in a group */
diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh
index 6d3c5c889d6..7e9204119bd 100755
--- a/gdb/gdbarch.sh
+++ b/gdb/gdbarch.sh
@@ -689,16 +689,16 @@ v;int;cannot_step_breakpoint;;;0;0;;0
 # See comment in target.h about continuable, steppable and
 # non-steppable watchpoints.
 v;int;have_nonsteppable_watchpoint;;;0;0;;0
-F;int;address_class_type_flags;int byte_size, int dwarf2_addr_class;byte_size, dwarf2_addr_class
+F;type_instance_flags;address_class_type_flags;int byte_size, int dwarf2_addr_class;byte_size, dwarf2_addr_class
 M;const char *;address_class_type_flags_to_name;int type_flags;type_flags
 # Execute vendor-specific DWARF Call Frame Instruction.  OP is the instruction.
 # FS are passed from the generic execute_cfa_program function.
 m;bool;execute_dwarf_cfa_vendor_op;gdb_byte op, struct dwarf2_frame_state *fs;op, fs;;default_execute_dwarf_cfa_vendor_op;;0
 
 # Return the appropriate type_flags for the supplied address class.
-# This function should return 1 if the address class was recognized and
-# type_flags was set, zero otherwise.
-M;int;address_class_name_to_type_flags;const char *name, int *type_flags_ptr;name, type_flags_ptr
+# This function should return true if the address class was recognized and
+# type_flags was set, false otherwise.
+M;bool;address_class_name_to_type_flags;const char *name, type_instance_flags *type_flags_ptr;name, type_flags_ptr
 # Is a register in a group
 m;int;register_reggroup_p;int regnum, struct reggroup *reggroup;regnum, reggroup;;default_register_reggroup_p;;0
 # Fetch the pointer to the ith function argument.
diff --git a/gdb/gdbtypes.c b/gdb/gdbtypes.c
index c1eb03d8984..64e44bfe23d 100644
--- a/gdb/gdbtypes.c
+++ b/gdb/gdbtypes.c
@@ -574,11 +574,11 @@ lookup_function_type_with_arguments (struct type *type,
 /* Identify address space identifier by name --
    return the integer flag defined in gdbtypes.h.  */
 
-int
+type_instance_flags
 address_space_name_to_int (struct gdbarch *gdbarch,
 			   const char *space_identifier)
 {
-  int type_flags;
+  type_instance_flags type_flags;
 
   /* Check for known address space delimiters.  */
   if (!strcmp (space_identifier, "code"))
@@ -598,7 +598,8 @@ address_space_name_to_int (struct gdbarch *gdbarch,
    gdbtypes.h -- return the string version of the adress space name.  */
 
 const char *
-address_space_int_to_name (struct gdbarch *gdbarch, int space_flag)
+address_space_int_to_name (struct gdbarch *gdbarch,
+			   type_instance_flags space_flag)
 {
   if (space_flag & TYPE_INSTANCE_FLAG_CODE_SPACE)
     return "code";
@@ -617,7 +618,7 @@ address_space_int_to_name (struct gdbarch *gdbarch, int space_flag)
    STORAGE must be in the same obstack as TYPE.  */
 
 static struct type *
-make_qualified_type (struct type *type, int new_flags,
+make_qualified_type (struct type *type, type_instance_flags new_flags,
 		     struct type *storage)
 {
   struct type *ntype;
@@ -657,7 +658,7 @@ make_qualified_type (struct type *type, int new_flags,
   TYPE_CHAIN (type) = ntype;
 
   /* Now set the instance flags and return the new type.  */
-  TYPE_INSTANCE_FLAGS (ntype) = new_flags;
+  SET_TYPE_INSTANCE_FLAGS (ntype, new_flags);
 
   /* Set length of new type to that of the original type.  */
   TYPE_LENGTH (ntype) = TYPE_LENGTH (type);
@@ -675,13 +676,14 @@ make_qualified_type (struct type *type, int new_flags,
    representations.  */
 
 struct type *
-make_type_with_address_space (struct type *type, int space_flag)
+make_type_with_address_space (struct type *type,
+			      type_instance_flags space_flag)
 {
-  int new_flags = ((TYPE_INSTANCE_FLAGS (type)
-		    & ~(TYPE_INSTANCE_FLAG_CODE_SPACE
-			| TYPE_INSTANCE_FLAG_DATA_SPACE
-		        | TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL))
-		   | space_flag);
+  type_instance_flags new_flags = ((TYPE_INSTANCE_FLAGS (type)
+				    & ~(TYPE_INSTANCE_FLAG_CODE_SPACE
+					| TYPE_INSTANCE_FLAG_DATA_SPACE
+					| TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL))
+				   | space_flag);
 
   return make_qualified_type (type, new_flags, NULL);
 }
@@ -705,9 +707,9 @@ make_cv_type (int cnst, int voltl,
 {
   struct type *ntype;	/* New type */
 
-  int new_flags = (TYPE_INSTANCE_FLAGS (type)
-		   & ~(TYPE_INSTANCE_FLAG_CONST 
-		       | TYPE_INSTANCE_FLAG_VOLATILE));
+  type_instance_flags new_flags = (TYPE_INSTANCE_FLAGS (type)
+				   & ~(TYPE_INSTANCE_FLAG_CONST
+				       | TYPE_INSTANCE_FLAG_VOLATILE));
 
   if (cnst)
     new_flags |= TYPE_INSTANCE_FLAG_CONST;
@@ -1410,7 +1412,6 @@ void
 make_vector_type (struct type *array_type)
 {
   struct type *inner_array, *elt_type;
-  int flags;
 
   /* Find the innermost array type, in case the array is
      multi-dimensional.  */
@@ -1421,7 +1422,8 @@ make_vector_type (struct type *array_type)
   elt_type = TYPE_TARGET_TYPE (inner_array);
   if (elt_type->code () == TYPE_CODE_INT)
     {
-      flags = TYPE_INSTANCE_FLAGS (elt_type) | TYPE_INSTANCE_FLAG_NOTTEXT;
+      type_instance_flags flags
+	= TYPE_INSTANCE_FLAGS (elt_type) | TYPE_INSTANCE_FLAG_NOTTEXT;
       elt_type = make_qualified_type (elt_type, flags, NULL);
       TYPE_TARGET_TYPE (inner_array) = elt_type;
     }
@@ -2732,12 +2734,13 @@ struct type *
 check_typedef (struct type *type)
 {
   struct type *orig_type = type;
-  /* While we're removing typedefs, we don't want to lose qualifiers.
-     E.g., const/volatile.  */
-  int instance_flags = TYPE_INSTANCE_FLAGS (type);
 
   gdb_assert (type);
 
+  /* While we're removing typedefs, we don't want to lose qualifiers.
+     E.g., const/volatile.  */
+  type_instance_flags instance_flags = TYPE_INSTANCE_FLAGS (type);
+
   while (type->code () == TYPE_CODE_TYPEDEF)
     {
       if (!TYPE_TARGET_TYPE (type))
@@ -2778,10 +2781,13 @@ check_typedef (struct type *type)
 	 outer cast in a chain of casting win), instead of assuming
 	 "it can't happen".  */
       {
-	const int ALL_SPACES = (TYPE_INSTANCE_FLAG_CODE_SPACE
-				| TYPE_INSTANCE_FLAG_DATA_SPACE);
-	const int ALL_CLASSES = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL;
-	int new_instance_flags = TYPE_INSTANCE_FLAGS (type);
+	const type_instance_flags ALL_SPACES
+	  = (TYPE_INSTANCE_FLAG_CODE_SPACE
+	     | TYPE_INSTANCE_FLAG_DATA_SPACE);
+	const type_instance_flags ALL_CLASSES
+	  = TYPE_INSTANCE_FLAG_ADDRESS_CLASS_ALL;
+	type_instance_flags new_instance_flags
+	  = TYPE_INSTANCE_FLAGS (type);
 
 	/* Treat code vs data spaces and address classes separately.  */
 	if ((instance_flags & ALL_SPACES) != 0)
@@ -5026,7 +5032,7 @@ recursive_dump_type (struct type *type, int spaces)
   gdb_print_host_address (TYPE_CHAIN (type), gdb_stdout);
   printf_filtered ("\n");
   printfi_filtered (spaces, "instance_flags 0x%x", 
-		    TYPE_INSTANCE_FLAGS (type));
+		    (unsigned) TYPE_INSTANCE_FLAGS (type));
   if (TYPE_CONST (type))
     {
       puts_filtered (" TYPE_CONST");
@@ -5300,7 +5306,7 @@ copy_type_recursive (struct objfile *objfile,
   if (type->name ())
     new_type->set_name (xstrdup (type->name ()));
 
-  TYPE_INSTANCE_FLAGS (new_type) = TYPE_INSTANCE_FLAGS (type);
+  SET_TYPE_INSTANCE_FLAGS (new_type, TYPE_INSTANCE_FLAGS (type));
   TYPE_LENGTH (new_type) = TYPE_LENGTH (type);
 
   /* Copy the fields.  */
@@ -5427,7 +5433,7 @@ copy_type (const struct type *type)
   gdb_assert (TYPE_OBJFILE_OWNED (type));
 
   new_type = alloc_type_copy (type);
-  TYPE_INSTANCE_FLAGS (new_type) = TYPE_INSTANCE_FLAGS (type);
+  SET_TYPE_INSTANCE_FLAGS (new_type, TYPE_INSTANCE_FLAGS (type));
   TYPE_LENGTH (new_type) = TYPE_LENGTH (type);
   memcpy (TYPE_MAIN_TYPE (new_type), TYPE_MAIN_TYPE (type),
 	  sizeof (struct main_type));
diff --git a/gdb/gdbtypes.h b/gdb/gdbtypes.h
index 55a6dafb7e2..b42cef61371 100644
--- a/gdb/gdbtypes.h
+++ b/gdb/gdbtypes.h
@@ -1585,7 +1585,10 @@ extern void allocate_gnat_aux_type (struct type *);
      TYPE_ZALLOC (type,							       \
 		  sizeof (*TYPE_MAIN_TYPE (type)->type_specific.func_stuff)))
 
-#define TYPE_INSTANCE_FLAGS(thistype) (thistype)->instance_flags
+#define TYPE_INSTANCE_FLAGS(thistype) \
+  type_instance_flags ((enum type_instance_flag_value) (thistype)->instance_flags)
+#define SET_TYPE_INSTANCE_FLAGS(thistype, flags) \
+  (thistype)->instance_flags = flags
 #define TYPE_MAIN_TYPE(thistype) (thistype)->main_type
 #define TYPE_TARGET_TYPE(thistype) TYPE_MAIN_TYPE(thistype)->target_type
 #define TYPE_POINTER_TYPE(thistype) (thistype)->pointer_type
@@ -2117,12 +2120,14 @@ extern struct type *make_atomic_type (struct type *);
 
 extern void replace_type (struct type *, struct type *);
 
-extern int address_space_name_to_int (struct gdbarch *, const char *);
+extern type_instance_flags address_space_name_to_int (struct gdbarch *,
+						      const char *);
 
-extern const char *address_space_int_to_name (struct gdbarch *, int);
+extern const char *address_space_int_to_name (struct gdbarch *,
+					      type_instance_flags);
 
-extern struct type *make_type_with_address_space (struct type *type, 
-						  int space_identifier);
+extern struct type *make_type_with_address_space
+  (struct type *type, type_instance_flags space_identifier);
 
 extern struct type *lookup_memberptr_type (struct type *, struct type *);
 
diff --git a/gdb/stabsread.c b/gdb/stabsread.c
index d2ff54a47bd..ed31dc01112 100644
--- a/gdb/stabsread.c
+++ b/gdb/stabsread.c
@@ -4397,7 +4397,7 @@ cleanup_undefined_types_noname (struct objfile *objfile)
              and needs to be copied over from the reference type.
              Since replace_type expects them to be identical, we need
              to set these flags manually before hand.  */
-          TYPE_INSTANCE_FLAGS (nat.type) = TYPE_INSTANCE_FLAGS (*type);
+          SET_TYPE_INSTANCE_FLAGS (nat.type, TYPE_INSTANCE_FLAGS (*type));
           replace_type (nat.type, *type);
         }
     }
diff --git a/gdb/type-stack.c b/gdb/type-stack.c
index f8661d75653..608142c8494 100644
--- a/gdb/type-stack.c
+++ b/gdb/type-stack.c
@@ -109,7 +109,7 @@ type_stack::follow_types (struct type *follow_type)
   int done = 0;
   int make_const = 0;
   int make_volatile = 0;
-  int make_addr_space = 0;
+  type_instance_flags make_addr_space = 0;
   bool make_restrict = false;
   bool make_atomic = false;
   int array_size;
@@ -128,7 +128,7 @@ type_stack::follow_types (struct type *follow_type)
 	make_volatile = 1;
 	break;
       case tp_space_identifier:
-	make_addr_space = pop_int ();
+	make_addr_space = (enum type_instance_flag_value) pop_int ();
 	break;
       case tp_atomic:
 	make_atomic = true;
-- 
2.25.4