glsl: Make ir_variable::max_ifc_array_access private

The payoff for this will come in a few more patches.

No change Valgrind massif results for a trimmed apitrace of dota2.

Signed-off-by: Ian Romanick <ian.d.romanick@intel.com>
Reviewed-by: Matt Turner <mattst88@gmail.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

src/glsl/ast_array_index.cpp

@@ -88,8 +88,14 @@ update_max_array_access(ir_rvalue *ir, unsigned idx, YYLTYPE *loc,
             unsigned field_index =
                deref_record->record->type->field_index(deref_record->field);
             assert(field_index < interface_type->length);
-            if (idx > deref_var->var->max_ifc_array_access[field_index]) {
-               deref_var->var->max_ifc_array_access[field_index] = idx;
+
+            unsigned *const max_ifc_array_access =
+               deref_var->var->get_max_ifc_array_access();
+
+            assert(max_ifc_array_access != NULL);
+
+            if (idx > max_ifc_array_access[field_index]) {
+               max_ifc_array_access[field_index] = idx;
 
                /* Check whether this access will, as a side effect, implicitly
                 * cause the size of a built-in array to be too large.

src/glsl/ir.h

@@ -526,6 +526,17 @@ public:
       return this->interface_type;
    }
 
+   /**
+    * Get the max_ifc_array_access pointer
+    *
+    * A "set" function is not needed because the array is dynmically allocated
+    * as necessary.
+    */
+   inline unsigned *get_max_ifc_array_access()
+   {
+      return this->max_ifc_array_access;
+   }
+
    /**
     * Enable emitting extension warnings for this variable
     */
@@ -548,19 +559,6 @@ public:
     */
    const char *name;
 
-   /**
-    * For variables which satisfy the is_interface_instance() predicate, this
-    * points to an array of integers such that if the ith member of the
-    * interface block is an array, max_ifc_array_access[i] is the maximum
-    * array element of that member that has been accessed.  If the ith member
-    * of the interface block is not an array, max_ifc_array_access[i] is
-    * unused.
-    *
-    * For variables whose type is not an interface block, this pointer is
-    * NULL.
-    */
-   unsigned *max_ifc_array_access;
-
    struct ir_variable_data {
 
       /**
@@ -822,6 +820,19 @@ public:
 private:
    static const char *const warn_extension_table[];
 
+   /**
+    * For variables which satisfy the is_interface_instance() predicate, this
+    * points to an array of integers such that if the ith member of the
+    * interface block is an array, max_ifc_array_access[i] is the maximum
+    * array element of that member that has been accessed.  If the ith member
+    * of the interface block is not an array, max_ifc_array_access[i] is
+    * unused.
+    *
+    * For variables whose type is not an interface block, this pointer is
+    * NULL.
+    */
+   unsigned *max_ifc_array_access;
+
    /**
     * For variables that are in an interface block or are an instance of an
     * interface block, this is the \c GLSL_TYPE_INTERFACE type for that block.

src/glsl/ir_validate.cpp

@@ -682,10 +682,15 @@ ir_validate::visit(ir_variable *ir)
          ir->get_interface_type()->fields.structure;
       for (unsigned i = 0; i < ir->get_interface_type()->length; i++) {
          if (fields[i].type->array_size() > 0) {
-            if (ir->max_ifc_array_access[i] >= fields[i].type->length) {
+            const unsigned *const max_ifc_array_access =
+               ir->get_max_ifc_array_access();
+
+            assert(max_ifc_array_access != NULL);
+
+            if (max_ifc_array_access[i] >= fields[i].type->length) {
                printf("ir_variable has maximum access out of bounds for "
                       "field %s (%d vs %d)\n", fields[i].name,
-                      ir->max_ifc_array_access[i], fields[i].type->length);
+                      max_ifc_array_access[i], fields[i].type->length);
                ir->print();
                abort();
             }

src/glsl/link_functions.cpp

@@ -245,11 +245,19 @@ public:
                /* Similarly, we need implicit sizes of arrays within interface
                 * blocks to be sized by the maximal access in *any* shader.
                 */
+               unsigned *const linked_max_ifc_array_access =
+                  var->get_max_ifc_array_access();
+               unsigned *const ir_max_ifc_array_access =
+                  ir->var->get_max_ifc_array_access();
+
+               assert(linked_max_ifc_array_access != NULL);
+               assert(ir_max_ifc_array_access != NULL);
+
                for (unsigned i = 0; i < var->get_interface_type()->length;
                     i++) {
-                  var->max_ifc_array_access[i] =
-                     MAX2(var->max_ifc_array_access[i],
-                          ir->var->max_ifc_array_access[i]);
+                  linked_max_ifc_array_access[i] =
+                     MAX2(linked_max_ifc_array_access[i],
+                          ir_max_ifc_array_access[i]);
                }
             }
 	 }

src/glsl/linker.cpp

@@ -1173,7 +1173,8 @@ public:
       if (var->type->is_interface()) {
          if (interface_contains_unsized_arrays(var->type)) {
             const glsl_type *new_type =
-               resize_interface_members(var->type, var->max_ifc_array_access);
+               resize_interface_members(var->type,
+                                        var->get_max_ifc_array_access());
             var->type = new_type;
             var->change_interface_type(new_type);
          }
@@ -1182,7 +1183,7 @@ public:
          if (interface_contains_unsized_arrays(var->type->fields.array)) {
             const glsl_type *new_type =
                resize_interface_members(var->type->fields.array,
-                                        var->max_ifc_array_access);
+                                        var->get_max_ifc_array_access());
             var->change_interface_type(new_type);
             var->type =
                glsl_type::get_array_instance(new_type, var->type->length);