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nir: Report progress from nir_remove_dead_variables().

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Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Reviewed-by: Jason Ekstrand <jason.ekstrand@intel.com>
This commit is contained in:
Kenneth Graunke 2015-09-17 10:57:14 -07:00
parent 9f5e7ae9d8
commit 1adde5b87e
2 changed files with 12 additions and 5 deletions
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2
src/glsl/nir/nir.h
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@ -1823,7 +1823,7 @@ void nir_lower_io(nir_shader *shader,
int (*type_size)(const struct glsl_type *));
void nir_lower_vars_to_ssa(nir_shader *shader);
void nir_remove_dead_variables(nir_shader *shader);
bool nir_remove_dead_variables(nir_shader *shader);
void nir_move_vec_src_uses_to_dest(nir_shader *shader);
bool nir_lower_vec_to_movs(nir_shader *shader);

15
src/glsl/nir/nir_remove_dead_variables.c
View file

@ -97,32 +97,39 @@ add_var_use_shader(nir_shader *shader, struct set *live)
}
}
static void
static bool
remove_dead_vars(struct exec_list *var_list, struct set *live)
{
bool progress = false;
foreach_list_typed_safe(nir_variable, var, node, var_list) {
struct set_entry *entry = _mesa_set_search(live, var);
if (entry == NULL) {
exec_node_remove(&var->node);
ralloc_free(var);
progress = true;
}
}
return progress;
}
void
bool
nir_remove_dead_variables(nir_shader *shader)
{
bool progress = false;
struct set *live =
_mesa_set_create(NULL, _mesa_hash_pointer, _mesa_key_pointer_equal);
add_var_use_shader(shader, live);
remove_dead_vars(&shader->globals, live);
progress = remove_dead_vars(&shader->globals, live) || progress;
nir_foreach_overload(shader, overload) {
if (overload->impl)
remove_dead_vars(&overload->impl->locals, live);
progress = remove_dead_vars(&overload->impl->locals, live) || progress;
}
_mesa_set_destroy(live, NULL);
return progress;
}