class lower_clip_distance_visitor : public ir_rvalue_visitor {
public:
- explicit lower_clip_distance_visitor(GLenum shader_type)
- : progress(false), old_clip_distance_1d_var(NULL),
- old_clip_distance_2d_var(NULL), new_clip_distance_1d_var(NULL),
- new_clip_distance_2d_var(NULL), shader_type(shader_type)
+ explicit lower_clip_distance_visitor(gl_shader_stage shader_stage)
+ : progress(false), old_clip_distance_out_var(NULL),
+ old_clip_distance_in_var(NULL), new_clip_distance_out_var(NULL),
+ new_clip_distance_in_var(NULL), shader_stage(shader_stage)
{
}
*
* Note:
*
- * - the 2d_var is for geometry shader input only.
+ * - the in_var is for geometry and both tessellation shader inputs only.
*
- * - since gl_ClipDistance is available in geometry shaders as both an
- * input and an output, it's possible for both old_clip_distance_1d_var
- * and old_clip_distance_2d_var to be non-null.
+ * - since gl_ClipDistance is available in tessellation control,
+ * tessellation evaluation and geometry shaders as both an input
+ * and an output, it's possible for both old_clip_distance_out_var
+ * and old_clip_distance_in_var to be non-null.
*/
- ir_variable *old_clip_distance_1d_var;
- ir_variable *old_clip_distance_2d_var;
+ ir_variable *old_clip_distance_out_var;
+ ir_variable *old_clip_distance_in_var;
/**
* Pointer to the newly-created gl_ClipDistanceMESA variable.
*/
- ir_variable *new_clip_distance_1d_var;
- ir_variable *new_clip_distance_2d_var;
+ ir_variable *new_clip_distance_out_var;
+ ir_variable *new_clip_distance_in_var;
/**
- * Type of shader we are compiling (e.g. GL_VERTEX_SHADER)
+ * Type of shader we are compiling (e.g. MESA_SHADER_VERTEX)
*/
- const GLenum shader_type;
+ const gl_shader_stage shader_stage;
};
} /* anonymous namespace */
ir_visitor_status
lower_clip_distance_visitor::visit(ir_variable *ir)
{
+ ir_variable **old_var;
+ ir_variable **new_var;
+
if (!ir->name || strcmp(ir->name, "gl_ClipDistance") != 0)
return visit_continue;
assert (ir->type->is_array());
- if (!ir->type->element_type()->is_array()) {
- /* 1D gl_ClipDistance (used for vertex and geometry output, and fragment
- * input).
- */
- if (this->old_clip_distance_1d_var)
+ if (ir->data.mode == ir_var_shader_out) {
+ if (this->old_clip_distance_out_var)
return visit_continue;
+ old_var = &old_clip_distance_out_var;
+ new_var = &new_clip_distance_out_var;
+ } else if (ir->data.mode == ir_var_shader_in) {
+ if (this->old_clip_distance_in_var)
+ return visit_continue;
+ old_var = &old_clip_distance_in_var;
+ new_var = &new_clip_distance_in_var;
+ } else {
+ unreachable("not reached");
+ }
- this->progress = true;
- this->old_clip_distance_1d_var = ir;
- assert (ir->type->element_type() == glsl_type::float_type);
+ this->progress = true;
+
+ if (!ir->type->fields.array->is_array()) {
+ /* gl_ClipDistance (used for vertex, tessellation evaluation and
+ * geometry output, and fragment input).
+ */
+ assert((ir->data.mode == ir_var_shader_in &&
+ this->shader_stage == MESA_SHADER_FRAGMENT) ||
+ (ir->data.mode == ir_var_shader_out &&
+ (this->shader_stage == MESA_SHADER_VERTEX ||
+ this->shader_stage == MESA_SHADER_TESS_EVAL ||
+ this->shader_stage == MESA_SHADER_GEOMETRY)));
+
+ *old_var = ir;
+ 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 */
- this->new_clip_distance_1d_var = ir->clone(ralloc_parent(ir), NULL);
+ *new_var = ir->clone(ralloc_parent(ir), NULL);
/* And change the properties that we need to change */
- this->new_clip_distance_1d_var->name
- = ralloc_strdup(this->new_clip_distance_1d_var,
- "gl_ClipDistanceMESA");
- this->new_clip_distance_1d_var->type
- = glsl_type::get_array_instance(glsl_type::vec4_type, new_size);
- this->new_clip_distance_1d_var->max_array_access
- = ir->max_array_access / 4;
-
- ir->replace_with(this->new_clip_distance_1d_var);
+ (*new_var)->name = ralloc_strdup(*new_var, "gl_ClipDistanceMESA");
+ (*new_var)->type = glsl_type::get_array_instance(glsl_type::vec4_type,
+ new_size);
+ (*new_var)->data.max_array_access = ir->data.max_array_access / 4;
+
+ ir->replace_with(*new_var);
} else {
- /* 2D gl_ClipDistance (used for geometry input). */
- assert(ir->mode == ir_var_shader_in &&
- this->shader_type == GL_GEOMETRY_SHADER_ARB);
- if (this->old_clip_distance_2d_var)
- return visit_continue;
+ /* 2D gl_ClipDistance (used for tessellation control, tessellation
+ * evaluation and geometry input, and tessellation control output).
+ */
+ assert((ir->data.mode == ir_var_shader_in &&
+ (this->shader_stage == MESA_SHADER_GEOMETRY ||
+ this->shader_stage == MESA_SHADER_TESS_EVAL)) ||
+ this->shader_stage == MESA_SHADER_TESS_CTRL);
- 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;
+ *old_var = ir;
+ 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);
+ *new_var = ir->clone(ralloc_parent(ir), NULL);
/* And change the properties that we need to change */
- this->new_clip_distance_2d_var->name
- = ralloc_strdup(this->new_clip_distance_2d_var, "gl_ClipDistanceMESA");
- this->new_clip_distance_2d_var->type = glsl_type::get_array_instance(
+ (*new_var)->name = ralloc_strdup(*new_var, "gl_ClipDistanceMESA");
+ (*new_var)->type = glsl_type::get_array_instance(
glsl_type::get_array_instance(glsl_type::vec4_type,
new_size),
ir->type->array_size());
- this->new_clip_distance_2d_var->max_array_access
- = ir->max_array_access / 4;
+ (*new_var)->data.max_array_access = ir->data.max_array_access / 4;
- ir->replace_with(this->new_clip_distance_2d_var);
+ ir->replace_with(*new_var);
}
+
return visit_continue;
}
{
/* Note that geometry shaders contain gl_ClipDistance both as an input
* (which is a 2D array) and an output (which is a 1D array), so it's
- * possible for both this->old_clip_distance_1d_var and
- * this->old_clip_distance_2d_var to be non-NULL in the same shader.
+ * possible for both this->old_clip_distance_out_var and
+ * this->old_clip_distance_in_var to be non-NULL in the same shader.
*/
- if (this->old_clip_distance_1d_var) {
- ir_dereference_variable *var_ref = ir->as_dereference_variable();
- if (var_ref && var_ref->var == this->old_clip_distance_1d_var)
+ if (!ir->type->is_array())
+ return false;
+ if (ir->type->fields.array != glsl_type::float_type)
+ return false;
+
+ if (this->old_clip_distance_out_var) {
+ if (ir->variable_referenced() == this->old_clip_distance_out_var)
return true;
}
- if (this->old_clip_distance_2d_var) {
- /* 2D clip distance is only possible as a geometry input */
- assert(this->shader_type == GL_GEOMETRY_SHADER_ARB);
+ if (this->old_clip_distance_in_var) {
+ assert(this->shader_stage == MESA_SHADER_TESS_CTRL ||
+ this->shader_stage == MESA_SHADER_TESS_EVAL ||
+ this->shader_stage == MESA_SHADER_GEOMETRY ||
+ this->shader_stage == MESA_SHADER_FRAGMENT);
- ir_dereference_array *array_ref = ir->as_dereference_array();
- if (array_ref) {
- ir_dereference_variable *var_ref =
- array_ref->array->as_dereference_variable();
- if (var_ref && var_ref->var == this->old_clip_distance_2d_var)
- return true;
- }
+ if (ir->variable_referenced() == this->old_clip_distance_in_var)
+ return true;
}
return false;
}
ir_rvalue *
lower_clip_distance_visitor::lower_clip_distance_vec8(ir_rvalue *ir)
{
- if (this->old_clip_distance_1d_var) {
- ir_dereference_variable *var_ref = ir->as_dereference_variable();
- if (var_ref && var_ref->var == this->old_clip_distance_1d_var) {
- return new(ralloc_parent(ir))
- ir_dereference_variable(this->new_clip_distance_1d_var);
- }
+ if (!ir->type->is_array())
+ return NULL;
+ if (ir->type->fields.array != glsl_type::float_type)
+ return NULL;
+
+ ir_variable **new_var = NULL;
+ if (this->old_clip_distance_out_var) {
+ if (ir->variable_referenced() == this->old_clip_distance_out_var)
+ new_var = &this->new_clip_distance_out_var;
+ }
+ if (this->old_clip_distance_in_var) {
+ if (ir->variable_referenced() == this->old_clip_distance_in_var)
+ new_var = &this->new_clip_distance_in_var;
}
- if (this->old_clip_distance_2d_var) {
- /* 2D clip distance is only possible as a geometry input */
- assert(this->shader_type == GL_GEOMETRY_SHADER_ARB);
+ if (new_var == NULL)
+ return NULL;
+ if (ir->as_dereference_variable()) {
+ return new(ralloc_parent(ir)) ir_dereference_variable(*new_var);
+ } else {
ir_dereference_array *array_ref = ir->as_dereference_array();
- if (array_ref) {
- ir_dereference_variable *var_ref =
- array_ref->array->as_dereference_variable();
- if (var_ref && var_ref->var == this->old_clip_distance_2d_var) {
- return new(ralloc_parent(ir))
- ir_dereference_array(this->new_clip_distance_2d_var,
- array_ref->array_index);
- }
- }
+ assert(array_ref);
+ assert(array_ref->array->as_dereference_variable());
+
+ return new(ralloc_parent(ir))
+ ir_dereference_array(*new_var, array_ref->array_index);
}
- return NULL;
}
ir_visitor_status
lower_clip_distance_visitor::visit_leave(ir_assignment *ir)
{
+ /* First invoke the base class visitor. This causes handle_rvalue() to be
+ * called on ir->rhs and ir->condition.
+ */
+ ir_rvalue_visitor::visit_leave(ir);
+
if (this->is_clip_distance_vec8(ir->lhs) ||
this->is_clip_distance_vec8(ir->rhs)) {
/* LHS or RHS of the assignment is the entire 1D gl_ClipDistance array
this->base_ir->insert_before(temp_clip_distance);
actual_param->replace_with(
new(ctx) ir_dereference_variable(temp_clip_distance));
- if (formal_param->mode == ir_var_function_in
- || formal_param->mode == ir_var_function_inout) {
+ if (formal_param->data.mode == ir_var_function_in
+ || formal_param->data.mode == ir_var_function_inout) {
/* Copy from gl_ClipDistance to the temporary before the call.
* Since we are going to insert this copy before the current
* instruction, we need to visit it afterwards to make sure it
this->base_ir->insert_before(new_assignment);
this->visit_new_assignment(new_assignment);
}
- if (formal_param->mode == ir_var_function_out
- || formal_param->mode == ir_var_function_inout) {
+ if (formal_param->data.mode == ir_var_function_out
+ || formal_param->data.mode == ir_var_function_inout) {
/* Copy from the temporary to gl_ClipDistance after the call.
* Since visit_list_elements() has already decided which
* instruction it's going to visit next, we need to visit
bool
lower_clip_distance(gl_shader *shader)
{
- lower_clip_distance_visitor v(shader->Type);
+ lower_clip_distance_visitor v(shader->Stage);
visit_list_elements(&v, shader->ir);
- if (v.new_clip_distance_1d_var)
- shader->symbols->add_variable(v.new_clip_distance_1d_var);
- if (v.new_clip_distance_2d_var)
- shader->symbols->add_variable(v.new_clip_distance_2d_var);
+ if (v.new_clip_distance_out_var)
+ shader->symbols->add_variable(v.new_clip_distance_out_var);
+ if (v.new_clip_distance_in_var)
+ shader->symbols->add_variable(v.new_clip_distance_in_var);
return v.progress;
}
projects / mesa.git / blobdiff