#include "nir.h"
-struct global_to_local_state {
- nir_function_impl *impl;
- /* A hash table keyed on variable pointers that stores the unique
- * nir_function_impl that uses the given variable. If a variable is
- * used in multiple functions, the data for the given key will be NULL.
- */
- struct hash_table *var_func_table;
-};
-
-static bool
-mark_global_var_uses_block(nir_block *block, void *void_state)
+static void
+register_var_use(nir_variable *var, nir_function_impl *impl,
+ struct hash_table *var_func_table)
{
- struct global_to_local_state *state = void_state;
+ if (var->data.mode != nir_var_shader_temp)
+ return;
- nir_foreach_instr(block, instr) {
- if (instr->type != nir_instr_type_intrinsic)
- continue;
-
- nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
- unsigned num_vars = nir_intrinsic_infos[intrin->intrinsic].num_variables;
-
- for (unsigned i = 0; i < num_vars; i++) {
- nir_variable *var = intrin->variables[i]->var;
- if (var->data.mode != nir_var_global)
- continue;
+ struct hash_entry *entry =
+ _mesa_hash_table_search(var_func_table, var);
- struct hash_entry *entry =
- _mesa_hash_table_search(state->var_func_table, var);
+ if (entry) {
+ if (entry->data != impl)
+ entry->data = NULL;
+ } else {
+ _mesa_hash_table_insert(var_func_table, var, impl);
+ }
+}
- if (entry) {
- if (entry->data != state->impl)
- entry->data = NULL;
- } else {
- _mesa_hash_table_insert(state->var_func_table, var, state->impl);
- }
+static bool
+mark_global_var_uses_block(nir_block *block, nir_function_impl *impl,
+ struct hash_table *var_func_table)
+{
+ nir_foreach_instr(instr, block) {
+ if (instr->type == nir_instr_type_deref) {
+ nir_deref_instr *deref = nir_instr_as_deref(instr);
+ if (deref->deref_type == nir_deref_type_var)
+ register_var_use(deref->var, impl, var_func_table);
}
}
bool
nir_lower_global_vars_to_local(nir_shader *shader)
{
- struct global_to_local_state state;
bool progress = false;
- state.var_func_table = _mesa_hash_table_create(NULL, _mesa_hash_pointer,
- _mesa_key_pointer_equal);
+ /* A hash table keyed on variable pointers that stores the unique
+ * nir_function_impl that uses the given variable. If a variable is
+ * used in multiple functions, the data for the given key will be NULL.
+ */
+ struct hash_table *var_func_table = _mesa_pointer_hash_table_create(NULL);
- nir_foreach_function(shader, function) {
+ nir_foreach_function(function, shader) {
if (function->impl) {
- state.impl = function->impl;
- nir_foreach_block(function->impl, mark_global_var_uses_block, &state);
+ nir_foreach_block(block, function->impl)
+ mark_global_var_uses_block(block, function->impl, var_func_table);
}
}
- struct hash_entry *entry;
- hash_table_foreach(state.var_func_table, entry) {
- nir_variable *var = (void *)entry->key;
- nir_function_impl *impl = entry->data;
+ nir_foreach_variable_with_modes_safe(var, shader, nir_var_shader_temp) {
+ struct hash_entry *entry = _mesa_hash_table_search(var_func_table, var);
+ if (!entry)
+ continue;
- assert(var->data.mode == nir_var_global);
+ nir_function_impl *impl = entry->data;
if (impl != NULL) {
exec_node_remove(&var->node);
- var->data.mode = nir_var_local;
+ var->data.mode = nir_var_function_temp;
exec_list_push_tail(&impl->locals, &var->node);
nir_metadata_preserve(impl, nir_metadata_block_index |
nir_metadata_dominance |
}
}
- _mesa_hash_table_destroy(state.var_func_table, NULL);
+ _mesa_hash_table_destroy(var_func_table, NULL);
+
+ if (progress)
+ nir_fixup_deref_modes(shader);
+
+ nir_foreach_function(function, shader) {
+ if (function->impl)
+ nir_metadata_preserve(function->impl, nir_metadata_all);
+ }
return progress;
}