freedreno/ir3: setup var locations in standalone compiler

Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/src/gallium/drivers/freedreno/ir3/ir3_cmdline.c b/src/gallium/drivers/freedreno/ir3/ir3_cmdline.c
index d749bfa..ba1bfa8 100644 (file)
--- a/src/gallium/drivers/freedreno/ir3/ir3_cmdline.c
+++ b/src/gallium/drivers/freedreno/ir3/ir3_cmdline.c
@@ -59,6 +59,43 @@ static void dump_info(struct ir3_shader_variant *so, const char *str)
 
 int st_glsl_type_size(const struct glsl_type *type);
 
+static void
+insert_sorted(struct exec_list *var_list, nir_variable *new_var)
+{
+       nir_foreach_variable(var, var_list) {
+               if (var->data.location > new_var->data.location) {
+                       exec_node_insert_node_before(&var->node, &new_var->node);
+                       return;
+               }
+       }
+       exec_list_push_tail(var_list, &new_var->node);
+}
+
+static void
+sort_varyings(struct exec_list *var_list)
+{
+       struct exec_list new_list;
+       exec_list_make_empty(&new_list);
+       nir_foreach_variable_safe(var, var_list) {
+               exec_node_remove(&var->node);
+               insert_sorted(&new_list, var);
+       }
+       exec_list_move_nodes_to(&new_list, var_list);
+}
+
+static void
+fixup_varying_slots(struct exec_list *var_list)
+{
+       nir_foreach_variable(var, var_list) {
+               if (var->data.location >= VARYING_SLOT_VAR0) {
+                       var->data.location += 9;
+               } else if ((var->data.location >= VARYING_SLOT_TEX0) &&
+                               (var->data.location <= VARYING_SLOT_TEX7)) {
+                       var->data.location += VARYING_SLOT_VAR0 - VARYING_SLOT_TEX0;
+               }
+       }
+}
+
 static nir_shader *
 load_glsl(unsigned num_files, char* const* files, gl_shader_stage stage)
 {
@@ -90,7 +127,38 @@ load_glsl(unsigned num_files, char* const* files, gl_shader_stage stage)
        NIR_PASS_V(nir, nir_lower_var_copies);
        NIR_PASS_V(nir, nir_lower_io_types);
 
-       // TODO nir_assign_var_locations??
+       switch (stage) {
+       case MESA_SHADER_VERTEX:
+               nir_assign_var_locations(&nir->inputs,
+                               &nir->num_inputs,
+                               st_glsl_type_size);
+
+               /* Re-lower global vars, to deal with any dead VS inputs. */
+               NIR_PASS_V(nir, nir_lower_global_vars_to_local);
+
+               sort_varyings(&nir->outputs);
+               nir_assign_var_locations(&nir->outputs,
+                               &nir->num_outputs,
+                               st_glsl_type_size);
+               fixup_varying_slots(&nir->outputs);
+               break;
+       case MESA_SHADER_FRAGMENT:
+               sort_varyings(&nir->inputs);
+               nir_assign_var_locations(&nir->inputs,
+                               &nir->num_inputs,
+                               st_glsl_type_size);
+               fixup_varying_slots(&nir->inputs);
+               nir_assign_var_locations(&nir->outputs,
+                               &nir->num_outputs,
+                               st_glsl_type_size);
+               break;
+       default:
+               errx(1, "unhandled shader stage: %d", stage);
+       }
+
+       nir_assign_var_locations(&nir->uniforms,
+                       &nir->num_uniforms,
+                       st_glsl_type_size);
 
        NIR_PASS_V(nir, nir_lower_system_values);
        NIR_PASS_V(nir, nir_lower_io, nir_var_all, st_glsl_type_size, 0);