glsl: remove element_type() helper

We now have is_array() and without_array() that make the
code much clearer and remove the need for this.

For all remaining calls to this we already knew that
the type was an array so returning a null wasn't adding any value.

v2: use without_array() in _mesa_ast_array_index_to_hir() and don't use
 without_array() in lower_clip_distance_visitor() as we want to make sure the
 array is 2D.

Reviewed-by: Matt Turner <mattst88@gmail.com>

src/glsl/ast_array_index.cpp

@@ -225,7 +225,7 @@ _mesa_ast_array_index_to_hir(void *mem_ctx,
        * values *do* diverge, then the behavior of the operation requiring a
        * dynamically uniform expression is undefined.
        */
-      if (array->type->element_type()->is_sampler()) {
+      if (array->type->without_array()->is_sampler()) {
 	 if (!state->is_version(130, 100)) {
 	    if (state->es_shader) {
 	       _mesa_glsl_warning(&loc, state,

src/glsl/ast_function.cpp

@@ -863,7 +863,7 @@ process_array_constructor(exec_list *instructions,
 
    if (is_unsized_array) {
       constructor_type =
-	 glsl_type::get_array_instance(constructor_type->element_type(),
+	 glsl_type::get_array_instance(constructor_type->fields.array,
 				       parameter_count);
       assert(constructor_type != NULL);
       assert(constructor_type->length == parameter_count);
@@ -876,7 +876,7 @@ process_array_constructor(exec_list *instructions,
       ir_rvalue *result = ir;
 
       const glsl_base_type element_base_type =
-         constructor_type->element_type()->base_type;
+         constructor_type->fields.array->base_type;
 
       /* Apply implicit conversions (not the scalar constructor rules!). See
        * the spec quote above. */
@@ -896,10 +896,10 @@ process_array_constructor(exec_list *instructions,
 	 }
       }
 
-      if (result->type != constructor_type->element_type()) {
+      if (result->type != constructor_type->fields.array) {
 	 _mesa_glsl_error(loc, state, "type error in array constructor: "
 			  "expected: %s, found %s",
-			  constructor_type->element_type()->name,
+			  constructor_type->fields.array->name,
 			  result->type->name);
          return ir_rvalue::error_value(ctx);
       }

src/glsl/ast_to_hir.cpp

@@ -678,7 +678,7 @@ validate_assignment(struct _mesa_glsl_parse_state *state,
     * is handled by ir_dereference::is_lvalue.
     */
    if (lhs_type->is_unsized_array() && rhs->type->is_array()
-       && (lhs_type->element_type() == rhs->type->element_type())) {
+       && (lhs_type->fields.array == rhs->type->fields.array)) {
       if (is_initializer) {
          return rhs;
       } else {
@@ -820,7 +820,7 @@ do_assignment(exec_list *instructions, struct _mesa_glsl_parse_state *state,
                              var->data.max_array_access);
          }
 
-         var->type = glsl_type::get_array_instance(lhs->type->element_type(),
+         var->type = glsl_type::get_array_instance(lhs->type->fields.array,
                                                    rhs->type->array_size());
          d->type = var->type;
       }
@@ -2330,8 +2330,7 @@ apply_image_qualifier_to_variable(const struct ast_type_qualifier *qual,
                                   struct _mesa_glsl_parse_state *state,
                                   YYLTYPE *loc)
 {
-   const glsl_type *base_type =
-      (var->type->is_array() ? var->type->element_type() : var->type);
+   const glsl_type *base_type = var->type->without_array();
 
    if (base_type->is_image()) {
       if (var->data.mode != ir_var_uniform &&
@@ -2855,7 +2854,7 @@ get_variable_being_redeclared(ir_variable *var, YYLTYPE loc,
     *  type and specify a size."
     */
    if (earlier->type->is_unsized_array() && var->type->is_array()
-       && (var->type->element_type() == earlier->type->element_type())) {
+       && (var->type->fields.array == earlier->type->fields.array)) {
       /* FINISHME: This doesn't match the qualifiers on the two
        * FINISHME: declarations.  It's not 100% clear whether this is
        * FINISHME: required or not.

src/glsl/glsl_parser_extras.cpp

@@ -778,7 +778,7 @@ _mesa_ast_set_aggregate_type(const glsl_type *type,
 
    /* If the aggregate is an array, recursively set its elements' types. */
    if (type->is_array()) {
-      /* Each array element has the type type->element_type().
+      /* Each array element has the type type->fields.array.
        *
        * E.g., if <type> if struct S[2] we want to set each element's type to
        * struct S.
@@ -790,7 +790,7 @@ _mesa_ast_set_aggregate_type(const glsl_type *type,
                                                link);
 
          if (expr->oper == ast_aggregate)
-            _mesa_ast_set_aggregate_type(type->element_type(), expr);
+            _mesa_ast_set_aggregate_type(type->fields.array, expr);
       }
 
    /* If the aggregate is a struct, recursively set its fields' types. */

src/glsl/glsl_types.cpp

@@ -217,7 +217,7 @@ glsl_type::contains_opaque() const {
    case GLSL_TYPE_ATOMIC_UINT:
       return true;
    case GLSL_TYPE_ARRAY:
-      return element_type()->contains_opaque();
+      return fields.array->contains_opaque();
    case GLSL_TYPE_STRUCT:
       for (unsigned int i = 0; i < length; i++) {
          if (fields.structure[i].type->contains_opaque())

src/glsl/glsl_types.h

@@ -227,18 +227,6 @@ struct glsl_type {
     */
    const glsl_type *get_scalar_type() const;
 
-   /**
-    * Query the type of elements in an array
-    *
-    * \return
-    * Pointer to the type of elements in the array for array types, or \c NULL
-    * for non-array types.
-    */
-   const glsl_type *element_type() const
-   {
-      return is_array() ? fields.array : NULL;
-   }
-
    /**
     * Get the instance of a built-in scalar, vector, or matrix type
     */
@@ -556,7 +544,7 @@ struct glsl_type {
       if (base_type == GLSL_TYPE_ATOMIC_UINT)
          return ATOMIC_COUNTER_SIZE;
       else if (is_array())
-         return length * element_type()->atomic_size();
+         return length * fields.array->atomic_size();
       else
          return 0;
    }

src/glsl/ir.cpp

@@ -912,7 +912,7 @@ ir_constant::zero(void *mem_ctx, const glsl_type *type)
       c->array_elements = ralloc_array(c, ir_constant *, type->length);
 
       for (unsigned i = 0; i < type->length; i++)
-	 c->array_elements[i] = ir_constant::zero(c, type->element_type());
+	 c->array_elements[i] = ir_constant::zero(c, type->fields.array);
    }
 
    if (type->is_record()) {
@@ -1341,7 +1341,7 @@ ir_dereference_array::set_array(ir_rvalue *value)
    const glsl_type *const vt = this->array->type;
 
    if (vt->is_array()) {
-      type = vt->element_type();
+      type = vt->fields.array;
    } else if (vt->is_matrix()) {
       type = vt->column_type();
    } else if (vt->is_vector()) {

src/glsl/link_atomics.cpp

@@ -207,7 +207,7 @@ link_assign_atomic_counter_resources(struct gl_context *ctx,
          storage->atomic_buffer_index = i;
          storage->offset = var->data.atomic.offset;
          storage->array_stride = (var->type->is_array() ?
-                                  var->type->element_type()->atomic_size() : 0);
+                                  var->type->without_array()->atomic_size() : 0);
       }
 
       /* Assign stage-specific fields. */

src/glsl/link_varyings.cpp

@@ -56,7 +56,7 @@ cross_validate_types_and_qualifiers(struct gl_shader_program *prog,
    const glsl_type *type_to_match = input->type;
    if (consumer_stage == MESA_SHADER_GEOMETRY) {
       assert(type_to_match->is_array()); /* Enforced by ast_to_hir */
-      type_to_match = type_to_match->element_type();
+      type_to_match = type_to_match->fields.array;
    }
    if (type_to_match != output->type) {
       /* There is a bit of a special case for gl_TexCoord.  This

src/glsl/linker.cpp

@@ -224,7 +224,7 @@ public:
          return visit_continue;
       }
 
-      var->type = glsl_type::get_array_instance(var->type->element_type(),
+      var->type = glsl_type::get_array_instance(var->type->fields.array,
                                                 this->num_vertices);
       var->data.max_array_access = this->num_vertices - 1;
 
@@ -245,7 +245,7 @@ public:
    {
       const glsl_type *const vt = ir->array->type;
       if (vt->is_array())
-         ir->type = vt->element_type();
+         ir->type = vt->fields.array;
       return visit_continue;
    }
 };

src/glsl/lower_clip_distance.cpp

@@ -114,7 +114,7 @@ lower_clip_distance_visitor::visit(ir_variable *ir)
       return visit_continue;
    assert (ir->type->is_array());
 
-   if (!ir->type->element_type()->is_array()) {
+   if (!ir->type->fields.array->is_array()) {
       /* 1D gl_ClipDistance (used for vertex and geometry output, and fragment
        * input).
        */
@@ -123,7 +123,7 @@ lower_clip_distance_visitor::visit(ir_variable *ir)
 
       this->progress = true;
       this->old_clip_distance_1d_var = ir;
-      assert (ir->type->element_type() == glsl_type::float_type);
+      assert (ir->type->fields.array == glsl_type::float_type);
       unsigned new_size = (ir->type->array_size() + 3) / 4;
 
       /* Clone the old var so that we inherit all of its properties */
@@ -148,8 +148,8 @@ lower_clip_distance_visitor::visit(ir_variable *ir)
 
       this->progress = true;
       this->old_clip_distance_2d_var = ir;
-      assert (ir->type->element_type()->element_type() == glsl_type::float_type);
-      unsigned new_size = (ir->type->element_type()->array_size() + 3) / 4;
+      assert (ir->type->fields.array->fields.array == glsl_type::float_type);
+      unsigned new_size = (ir->type->fields.array->array_size() + 3) / 4;
 
       /* Clone the old var so that we inherit all of its properties */
       this->new_clip_distance_2d_var = ir->clone(ralloc_parent(ir), NULL);