2014-07-30 19:56:52 +01:00
|
|
|
/*
|
|
|
|
* Copyright © 2014 Intel Corporation
|
|
|
|
*
|
|
|
|
* Permission is hereby granted, free of charge, to any person obtaining a
|
|
|
|
* copy of this software and associated documentation files (the "Software"),
|
|
|
|
* to deal in the Software without restriction, including without limitation
|
|
|
|
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
|
|
|
|
* and/or sell copies of the Software, and to permit persons to whom the
|
|
|
|
* Software is furnished to do so, subject to the following conditions:
|
|
|
|
*
|
|
|
|
* The above copyright notice and this permission notice (including the next
|
|
|
|
* paragraph) shall be included in all copies or substantial portions of the
|
|
|
|
* Software.
|
|
|
|
*
|
|
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
|
|
|
|
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
|
|
|
|
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
|
|
|
|
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
|
|
|
|
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
|
|
|
|
* IN THE SOFTWARE.
|
|
|
|
*
|
|
|
|
* Authors:
|
|
|
|
* Connor Abbott (cwabbott0@gmail.com)
|
|
|
|
*
|
|
|
|
*/
|
|
|
|
|
|
|
|
#include "nir.h"
|
|
|
|
|
|
|
|
static void
|
2017-10-16 23:32:30 +01:00
|
|
|
add_var_use_intrinsic(nir_intrinsic_instr *instr, struct set *live,
|
|
|
|
nir_variable_mode modes)
|
2014-07-30 19:56:52 +01:00
|
|
|
{
|
|
|
|
unsigned num_vars = nir_intrinsic_infos[instr->intrinsic].num_variables;
|
2016-12-10 03:37:12 +00:00
|
|
|
|
|
|
|
switch (instr->intrinsic) {
|
|
|
|
case nir_intrinsic_copy_var:
|
|
|
|
_mesa_set_add(live, instr->variables[1]->var);
|
|
|
|
/* Fall through */
|
|
|
|
case nir_intrinsic_store_var: {
|
|
|
|
/* The first source in both copy_var and store_var is the destination.
|
|
|
|
* If the variable is a local that never escapes the shader, then we
|
|
|
|
* don't mark it as live for just a store.
|
|
|
|
*/
|
|
|
|
nir_variable_mode mode = instr->variables[0]->var->data.mode;
|
|
|
|
if (!(mode & (nir_var_local | nir_var_global | nir_var_shared)))
|
|
|
|
_mesa_set_add(live, instr->variables[0]->var);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
2017-10-16 23:32:30 +01:00
|
|
|
/* This pass can't be used on I/O variables after they've been lowered. */
|
|
|
|
case nir_intrinsic_load_input:
|
|
|
|
assert(!(modes & nir_var_shader_in));
|
|
|
|
break;
|
|
|
|
case nir_intrinsic_store_output:
|
|
|
|
assert(!(modes & nir_var_shader_out));
|
|
|
|
break;
|
|
|
|
|
2016-12-10 03:37:12 +00:00
|
|
|
default:
|
|
|
|
for (unsigned i = 0; i < num_vars; i++) {
|
|
|
|
_mesa_set_add(live, instr->variables[i]->var);
|
|
|
|
}
|
|
|
|
break;
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
add_var_use_call(nir_call_instr *instr, struct set *live)
|
|
|
|
{
|
|
|
|
if (instr->return_deref != NULL) {
|
|
|
|
nir_variable *var = instr->return_deref->var;
|
2015-01-15 17:31:18 +00:00
|
|
|
_mesa_set_add(live, var);
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
for (unsigned i = 0; i < instr->num_params; i++) {
|
|
|
|
nir_variable *var = instr->params[i]->var;
|
2015-01-15 17:31:18 +00:00
|
|
|
_mesa_set_add(live, var);
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
|
|
|
add_var_use_tex(nir_tex_instr *instr, struct set *live)
|
|
|
|
{
|
2016-02-06 17:05:10 +00:00
|
|
|
if (instr->texture != NULL) {
|
|
|
|
nir_variable *var = instr->texture->var;
|
2015-01-15 17:31:18 +00:00
|
|
|
_mesa_set_add(live, var);
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|
2015-11-03 01:58:29 +00:00
|
|
|
|
|
|
|
if (instr->sampler != NULL) {
|
|
|
|
nir_variable *var = instr->sampler->var;
|
|
|
|
_mesa_set_add(live, var);
|
|
|
|
}
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
static void
|
2017-10-16 23:32:30 +01:00
|
|
|
add_var_use_shader(nir_shader *shader, struct set *live, nir_variable_mode modes)
|
2014-07-30 19:56:52 +01:00
|
|
|
{
|
2016-04-27 04:26:42 +01:00
|
|
|
nir_foreach_function(function, shader) {
|
2015-12-26 18:00:47 +00:00
|
|
|
if (function->impl) {
|
2016-04-12 20:14:04 +01:00
|
|
|
nir_foreach_block(block, function->impl) {
|
2016-04-27 02:34:19 +01:00
|
|
|
nir_foreach_instr(instr, block) {
|
2016-04-12 20:14:04 +01:00
|
|
|
switch(instr->type) {
|
|
|
|
case nir_instr_type_intrinsic:
|
2017-10-16 23:32:30 +01:00
|
|
|
add_var_use_intrinsic(nir_instr_as_intrinsic(instr), live,
|
|
|
|
modes);
|
2016-04-12 20:14:04 +01:00
|
|
|
break;
|
|
|
|
|
|
|
|
case nir_instr_type_call:
|
|
|
|
add_var_use_call(nir_instr_as_call(instr), live);
|
|
|
|
break;
|
|
|
|
|
|
|
|
case nir_instr_type_tex:
|
|
|
|
add_var_use_tex(nir_instr_as_tex(instr), live);
|
|
|
|
break;
|
|
|
|
|
|
|
|
default:
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2016-12-10 03:37:12 +00:00
|
|
|
static void
|
|
|
|
remove_dead_var_writes(nir_shader *shader, struct set *live)
|
|
|
|
{
|
|
|
|
nir_foreach_function(function, shader) {
|
|
|
|
if (!function->impl)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
nir_foreach_block(block, function->impl) {
|
|
|
|
nir_foreach_instr_safe(instr, block) {
|
|
|
|
if (instr->type != nir_instr_type_intrinsic)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
nir_intrinsic_instr *intrin = nir_instr_as_intrinsic(instr);
|
|
|
|
if (intrin->intrinsic != nir_intrinsic_copy_var &&
|
|
|
|
intrin->intrinsic != nir_intrinsic_store_var)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* Stores to dead variables need to be removed */
|
|
|
|
if (intrin->variables[0]->var->data.mode == 0)
|
|
|
|
nir_instr_remove(instr);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2015-09-17 18:57:14 +01:00
|
|
|
static bool
|
2015-03-27 23:17:20 +00:00
|
|
|
remove_dead_vars(struct exec_list *var_list, struct set *live)
|
2014-07-30 19:56:52 +01:00
|
|
|
{
|
2015-09-17 18:57:14 +01:00
|
|
|
bool progress = false;
|
|
|
|
|
2015-03-27 23:17:20 +00:00
|
|
|
foreach_list_typed_safe(nir_variable, var, node, var_list) {
|
2015-01-15 17:31:18 +00:00
|
|
|
struct set_entry *entry = _mesa_set_search(live, var);
|
2015-03-27 23:19:27 +00:00
|
|
|
if (entry == NULL) {
|
2016-12-10 03:37:12 +00:00
|
|
|
/* Mark this variable as used by setting the mode to 0 */
|
|
|
|
var->data.mode = 0;
|
2014-07-30 19:56:52 +01:00
|
|
|
exec_node_remove(&var->node);
|
2015-09-17 18:57:14 +01:00
|
|
|
progress = true;
|
2015-03-27 23:19:27 +00:00
|
|
|
}
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|
2015-09-17 18:57:14 +01:00
|
|
|
|
|
|
|
return progress;
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|
|
|
|
|
2015-09-17 18:57:14 +01:00
|
|
|
bool
|
2016-03-25 21:26:11 +00:00
|
|
|
nir_remove_dead_variables(nir_shader *shader, nir_variable_mode modes)
|
2014-07-30 19:56:52 +01:00
|
|
|
{
|
2015-09-17 18:57:14 +01:00
|
|
|
bool progress = false;
|
2014-07-30 19:56:52 +01:00
|
|
|
struct set *live =
|
2015-01-15 17:31:18 +00:00
|
|
|
_mesa_set_create(NULL, _mesa_hash_pointer, _mesa_key_pointer_equal);
|
2014-07-30 19:56:52 +01:00
|
|
|
|
2018-05-16 15:02:55 +01:00
|
|
|
nir_assert_lowered_derefs(shader, nir_lower_all_derefs);
|
|
|
|
|
2017-10-16 23:32:30 +01:00
|
|
|
add_var_use_shader(shader, live, modes);
|
2014-07-30 19:56:52 +01:00
|
|
|
|
2016-03-25 21:26:11 +00:00
|
|
|
if (modes & nir_var_uniform)
|
|
|
|
progress = remove_dead_vars(&shader->uniforms, live) || progress;
|
2014-07-30 19:56:52 +01:00
|
|
|
|
2016-03-25 21:26:11 +00:00
|
|
|
if (modes & nir_var_shader_in)
|
|
|
|
progress = remove_dead_vars(&shader->inputs, live) || progress;
|
|
|
|
|
|
|
|
if (modes & nir_var_shader_out)
|
|
|
|
progress = remove_dead_vars(&shader->outputs, live) || progress;
|
|
|
|
|
|
|
|
if (modes & nir_var_global)
|
|
|
|
progress = remove_dead_vars(&shader->globals, live) || progress;
|
|
|
|
|
|
|
|
if (modes & nir_var_system_value)
|
|
|
|
progress = remove_dead_vars(&shader->system_values, live) || progress;
|
|
|
|
|
2017-01-06 23:33:35 +00:00
|
|
|
if (modes & nir_var_shared)
|
|
|
|
progress = remove_dead_vars(&shader->shared, live) || progress;
|
|
|
|
|
2016-03-25 21:26:11 +00:00
|
|
|
if (modes & nir_var_local) {
|
2016-04-27 04:26:42 +01:00
|
|
|
nir_foreach_function(function, shader) {
|
2016-03-25 21:26:11 +00:00
|
|
|
if (function->impl) {
|
2016-12-10 03:37:12 +00:00
|
|
|
if (remove_dead_vars(&function->impl->locals, live))
|
2016-03-25 21:26:11 +00:00
|
|
|
progress = true;
|
2016-12-10 03:37:12 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (progress) {
|
|
|
|
remove_dead_var_writes(shader, live);
|
|
|
|
|
|
|
|
nir_foreach_function(function, shader) {
|
|
|
|
if (function->impl) {
|
|
|
|
nir_metadata_preserve(function->impl, nir_metadata_block_index |
|
|
|
|
nir_metadata_dominance);
|
2015-11-03 05:28:26 +00:00
|
|
|
}
|
|
|
|
}
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|
|
|
|
|
|
|
|
_mesa_set_destroy(live, NULL);
|
2015-09-17 18:57:14 +01:00
|
|
|
return progress;
|
2014-07-30 19:56:52 +01:00
|
|
|
}
|