#include "ir.h"
#include "ir_optimization.h"
+namespace {
+
/**
* Visitor that performs varying packing. For each varying declared in the
* shader, this visitor determines whether it needs to be packed. If so, it
class lower_packed_varyings_visitor
{
public:
- lower_packed_varyings_visitor(void *mem_ctx, unsigned location_base,
- unsigned locations_used,
+ lower_packed_varyings_visitor(void *mem_ctx, unsigned locations_used,
ir_variable_mode mode,
unsigned gs_input_vertices,
exec_list *out_instructions);
*/
void * const mem_ctx;
- /**
- * Location representing the first generic varying slot for this shader
- * stage (e.g. VARYING_SLOT_VAR0 if we are packing vertex shader outputs).
- * Varyings whose location is less than this value are assumed to
- * correspond to special fixed function hardware, so they are not lowered.
- */
- const unsigned location_base;
-
/**
* Number of generic varying slots which are used by this shader. This is
- * used to allocate temporary intermediate data structures. If any any
- * varying used by this shader has a location greater than or equal to
- * location_base + locations_used, an assertion will fire.
+ * used to allocate temporary intermediate data structures. If any varying
+ * used by this shader has a location greater than or equal to
+ * VARYING_SLOT_VAR0 + locations_used, an assertion will fire.
*/
const unsigned locations_used;
exec_list *out_instructions;
};
+} /* anonymous namespace */
+
lower_packed_varyings_visitor::lower_packed_varyings_visitor(
- void *mem_ctx, unsigned location_base, unsigned locations_used,
- ir_variable_mode mode, unsigned gs_input_vertices,
- exec_list *out_instructions)
+ void *mem_ctx, unsigned locations_used, ir_variable_mode mode,
+ unsigned gs_input_vertices, exec_list *out_instructions)
: mem_ctx(mem_ctx),
- location_base(location_base),
locations_used(locations_used),
packed_varyings((ir_variable **)
rzalloc_array_size(mem_ctx, sizeof(*packed_varyings),
void
lower_packed_varyings_visitor::run(exec_list *instructions)
{
- foreach_list (node, instructions) {
- ir_variable *var = ((ir_instruction *) node)->as_variable();
+ foreach_in_list(ir_instruction, node, instructions) {
+ ir_variable *var = node->as_variable();
if (var == NULL)
continue;
- if (var->mode != this->mode ||
- var->location < (int) this->location_base ||
+ if (var->data.mode != this->mode ||
+ var->data.location < VARYING_SLOT_VAR0 ||
!this->needs_lowering(var))
continue;
* safe, caller should ensure that integral varyings always use flat
* interpolation, even when this is not required by GLSL.
*/
- assert(var->interpolation == INTERP_QUALIFIER_FLAT ||
+ assert(var->data.interpolation == INTERP_QUALIFIER_FLAT ||
!var->type->contains_integer());
/* Change the old varying into an ordinary global. */
- var->mode = ir_var_auto;
+ assert(var->data.mode != ir_var_temporary);
+ var->data.mode = ir_var_auto;
/* Create a reference to the old varying. */
ir_dereference_variable *deref
= new(this->mem_ctx) ir_dereference_variable(var);
/* Recursively pack or unpack it. */
- this->lower_rvalue(deref, var->location * 4 + var->location_frac, var,
+ this->lower_rvalue(deref, var->data.location * 4 + var->data.location_frac, var,
var->name, this->gs_input_vertices != 0, 0);
}
}
ir_constant *constant = new(this->mem_ctx) ir_constant(i);
ir_dereference_array *dereference_array = new(this->mem_ctx)
ir_dereference_array(rvalue, constant);
- char *subscripted_name
- = ralloc_asprintf(this->mem_ctx, "%s[%d]", name, i);
if (gs_input_toplevel) {
/* Geometry shader inputs are a special case. Instead of storing
* each element of the array at a different location, all elements
* are at the same location, but with a different vertex index.
*/
(void) this->lower_rvalue(dereference_array, fine_location,
- unpacked_var, subscripted_name,
- false, i);
+ unpacked_var, name, false, i);
} else {
+ char *subscripted_name
+ = ralloc_asprintf(this->mem_ctx, "%s[%d]", name, i);
fine_location =
this->lower_rvalue(dereference_array, fine_location,
unpacked_var, subscripted_name,
unsigned location, ir_variable *unpacked_var, const char *name,
unsigned vertex_index)
{
- unsigned slot = location - this->location_base;
+ unsigned slot = location - VARYING_SLOT_VAR0;
assert(slot < locations_used);
if (this->packed_varyings[slot] == NULL) {
char *packed_name = ralloc_asprintf(this->mem_ctx, "packed:%s", name);
const glsl_type *packed_type;
- if (unpacked_var->interpolation == INTERP_QUALIFIER_FLAT)
+ if (unpacked_var->data.interpolation == INTERP_QUALIFIER_FLAT)
packed_type = glsl_type::ivec4_type;
else
packed_type = glsl_type::vec4_type;
/* Prevent update_array_sizes() from messing with the size of the
* array.
*/
- packed_var->max_array_access = this->gs_input_vertices - 1;
+ packed_var->data.max_array_access = this->gs_input_vertices - 1;
}
- packed_var->centroid = unpacked_var->centroid;
- packed_var->interpolation = unpacked_var->interpolation;
- packed_var->location = location;
+ packed_var->data.centroid = unpacked_var->data.centroid;
+ packed_var->data.sample = unpacked_var->data.sample;
+ packed_var->data.interpolation = unpacked_var->data.interpolation;
+ packed_var->data.location = location;
unpacked_var->insert_before(packed_var);
this->packed_varyings[slot] = packed_var;
} else {
bool
lower_packed_varyings_visitor::needs_lowering(ir_variable *var)
{
- /* Things composed of vec4's don't need lowering. Everything else does. */
+ /* Things composed of vec4's and varyings with explicitly assigned
+ * locations don't need lowering. Everything else does.
+ */
+ if (var->data.explicit_location)
+ return false;
+
const glsl_type *type = var->type;
if (this->gs_input_vertices != 0) {
assert(type->is_array());
explicit lower_packed_varyings_gs_splicer(void *mem_ctx,
const exec_list *instructions);
- virtual ir_visitor_status visit(ir_emit_vertex *ev);
+ virtual ir_visitor_status visit_leave(ir_emit_vertex *ev);
private:
/**
ir_visitor_status
-lower_packed_varyings_gs_splicer::visit(ir_emit_vertex *ev)
+lower_packed_varyings_gs_splicer::visit_leave(ir_emit_vertex *ev)
{
- foreach_list(node, this->instructions) {
- ir_instruction *ir = (ir_instruction *) node;
+ foreach_in_list(ir_instruction, ir, this->instructions) {
ev->insert_before(ir->clone(this->mem_ctx, NULL));
}
return visit_continue;
void
-lower_packed_varyings(void *mem_ctx, unsigned location_base,
- unsigned locations_used, ir_variable_mode mode,
- unsigned gs_input_vertices, gl_shader *shader)
+lower_packed_varyings(void *mem_ctx, unsigned locations_used,
+ ir_variable_mode mode, unsigned gs_input_vertices,
+ gl_shader *shader)
{
exec_list *instructions = shader->ir;
ir_function *main_func = shader->symbols->get_function("main");
exec_list void_parameters;
ir_function_signature *main_func_sig
- = main_func->matching_signature(NULL, &void_parameters);
+ = main_func->matching_signature(NULL, &void_parameters, false);
exec_list new_instructions;
- lower_packed_varyings_visitor visitor(mem_ctx, location_base,
- locations_used, mode,
+ lower_packed_varyings_visitor visitor(mem_ctx, locations_used, mode,
gs_input_vertices, &new_instructions);
visitor.run(instructions);
if (mode == ir_var_shader_out) {
- if (shader->Type == GL_GEOMETRY_SHADER) {
+ if (shader->Stage == MESA_SHADER_GEOMETRY) {
/* For geometry shaders, outputs need to be lowered before each call
* to EmitVertex()
*/
projects / mesa.git / blobdiff