#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)
+mark_global_var_uses_block(nir_block *block, nir_function_impl *impl,
+ struct hash_table *var_func_table)
{
- struct global_to_local_state *state = void_state;
-
nir_foreach_instr(block, instr) {
if (instr->type != nir_instr_type_intrinsic)
continue;
continue;
struct hash_entry *entry =
- _mesa_hash_table_search(state->var_func_table, var);
+ _mesa_hash_table_search(var_func_table, var);
if (entry) {
- if (entry->data != state->impl)
+ if (entry->data != impl)
entry->data = NULL;
} else {
- _mesa_hash_table_insert(state->var_func_table, var, state->impl);
+ _mesa_hash_table_insert(var_func_table, var, impl);
}
}
}
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_hash_table_create(NULL, _mesa_hash_pointer,
+ _mesa_key_pointer_equal);
nir_foreach_function(shader, function) {
if (function->impl) {
- state.impl = function->impl;
- nir_foreach_block_call(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) {
+ hash_table_foreach(var_func_table, entry) {
nir_variable *var = (void *)entry->key;
nir_function_impl *impl = entry->data;
}
}
- _mesa_hash_table_destroy(state.var_func_table, NULL);
+ _mesa_hash_table_destroy(var_func_table, NULL);
return progress;
}