gdb: add type::bounds / type::set_bounds

Add the `bounds` and `set_bounds` methods on `struct type`, in order to
remove the `TYPE_RANGE_DATA` macro.  In this patch, the
`TYPE_RANGE_DATA` macro is changed to use `type::bounds`, so all the
call sites that are used to set a range type's bounds are changed to use
`type::set_bounds`.  The next patch will remove `TYPE_RANGE_DATA`
completely.

gdb/ChangeLog:

	* gdbtypes.h (struct type) <bounds, set_bounds>: New methods.
	(TYPE_RANGE_DATA): Use type::bounds.  Change all uses that
	are used to set the range type's bounds to use set_bounds.

Change-Id: I62e15506239b98404e62bbea8120db184ed87847

4 files changed, 39 insertions, 12 deletions

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 8fb5878..09bcc67 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,9 @@
+2020-07-12  Simon Marchi  <simon.marchi@efficios.com>
+
+	* gdbtypes.h (struct type) <bounds, set_bounds>: New methods.
+	(TYPE_RANGE_DATA): Use type::bounds.  Change all uses that
+	are used to set the range type's bounds to use set_bounds.
+
 2020-07-11  Philippe Waroquiers  <philippe.waroquiers@skynet.be>
 
 	* exec.c (_initialize_exec): Update exec-file-mismatch help.
diff --git a/gdb/gdbtypes.c b/gdb/gdbtypes.c
index cdf88a4..66f0943 100644
--- a/gdb/gdbtypes.c
+++ b/gdb/gdbtypes.c
@@ -935,15 +935,17 @@ create_range_type (struct type *result_type, struct type *index_type,
   else
     TYPE_LENGTH (result_type) = TYPE_LENGTH (check_typedef (index_type));
 
-  TYPE_RANGE_DATA (result_type) = (struct range_bounds *)
-    TYPE_ZALLOC (result_type, sizeof (struct range_bounds));
-  TYPE_RANGE_DATA (result_type)->low = *low_bound;
-  TYPE_RANGE_DATA (result_type)->high = *high_bound;
-  TYPE_RANGE_DATA (result_type)->bias = bias;
+  range_bounds *bounds
+    = (struct range_bounds *) TYPE_ZALLOC (result_type, sizeof (range_bounds));
+  bounds->low = *low_bound;
+  bounds->high = *high_bound;
+  bounds->bias = bias;
 
   /* Initialize the stride to be a constant, the value will already be zero
      thanks to the use of TYPE_ZALLOC above.  */
-  TYPE_RANGE_DATA (result_type)->stride.kind = PROP_CONST;
+  bounds->stride.kind = PROP_CONST;
+
+  result_type->set_bounds (bounds);
 
   if (low_bound->kind == PROP_CONST && low_bound->data.const_val >= 0)
     TYPE_UNSIGNED (result_type) = 1;
@@ -5363,9 +5365,12 @@ copy_type_recursive (struct objfile *objfile,
   /* For range types, copy the bounds information.  */
   if (type->code () == TYPE_CODE_RANGE)
     {
-      TYPE_RANGE_DATA (new_type) = (struct range_bounds *)
-        TYPE_ALLOC (new_type, sizeof (struct range_bounds));
-      *TYPE_RANGE_DATA (new_type) = *TYPE_RANGE_DATA (type);
+      range_bounds *bounds
+        = ((struct range_bounds *) TYPE_ALLOC
+	   (new_type, sizeof (struct range_bounds)));
+
+      *bounds = *type->bounds ();
+      new_type->set_bounds (bounds);
     }
 
   if (type->main_type->dyn_prop_list != NULL)
diff --git a/gdb/gdbtypes.h b/gdb/gdbtypes.h
index 28d42ef..236d37b 100644
--- a/gdb/gdbtypes.h
+++ b/gdb/gdbtypes.h
@@ -953,6 +953,22 @@ struct type
     this->field (0).set_type (index_type);
   }
 
+  /* Get the bounds bounds of this type.  The type must be a range type.  */
+  range_bounds *bounds () const
+  {
+    gdb_assert (this->code () == TYPE_CODE_RANGE);
+
+    return this->main_type->flds_bnds.bounds;
+  }
+
+  /* Set the bounds of this type.  The type must be a range type.  */
+  void set_bounds (range_bounds *bounds)
+  {
+    gdb_assert (this->code () == TYPE_CODE_RANGE);
+
+    this->main_type->flds_bnds.bounds = bounds;
+  }
+
   /* * Return the dynamic property of the requested KIND from this type's
      list of dynamic properties.  */
   dynamic_prop *dyn_prop (dynamic_prop_node_kind kind) const;
@@ -1502,7 +1518,7 @@ extern unsigned type_align (struct type *);
    space in struct type.  */
 extern bool set_type_align (struct type *, ULONGEST);
 
-#define TYPE_RANGE_DATA(thistype) TYPE_MAIN_TYPE(thistype)->flds_bnds.bounds
+#define TYPE_RANGE_DATA(thistype) ((thistype)->bounds ())
 #define TYPE_LOW_BOUND(range_type) \
   TYPE_RANGE_DATA(range_type)->low.data.const_val
 #define TYPE_HIGH_BOUND(range_type) \
diff --git a/gdb/mdebugread.c b/gdb/mdebugread.c
index 6f76bc6..aa0c715 100644
--- a/gdb/mdebugread.c
+++ b/gdb/mdebugread.c
@@ -1734,8 +1734,8 @@ parse_type (int fd, union aux_ext *ax, unsigned int aux_index, int *bs,
   if (t->bt == btRange)
     {
       tp->set_num_fields (0);
-      TYPE_RANGE_DATA (tp) = ((struct range_bounds *)
-			  TYPE_ZALLOC (tp, sizeof (struct range_bounds)));
+      tp->set_bounds (((struct range_bounds *)
+			TYPE_ZALLOC (tp, sizeof (struct range_bounds))));
       TYPE_LOW_BOUND (tp) = AUX_GET_DNLOW (bigend, ax);
       ax++;
       TYPE_HIGH_BOUND (tp) = AUX_GET_DNHIGH (bigend, ax);