nir: add support for user defined loop control
This will allow us to make use of the loop control support in spirv and the GL support provided by EXT_control_flow_attributes. Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl> Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=108841
This commit is contained in:
parent
6170814c42
commit
b56451f82c
|
@ -1968,12 +1968,19 @@ typedef struct {
|
|||
struct list_head loop_terminator_list;
|
||||
} nir_loop_info;
|
||||
|
||||
typedef enum {
|
||||
nir_loop_control_none = 0x0,
|
||||
nir_loop_control_unroll = 0x1,
|
||||
nir_loop_control_dont_unroll = 0x2,
|
||||
} nir_loop_control;
|
||||
|
||||
typedef struct {
|
||||
nir_cf_node cf_node;
|
||||
|
||||
struct exec_list body; /** < list of nir_cf_node */
|
||||
|
||||
nir_loop_info *info;
|
||||
nir_loop_control control;
|
||||
bool partially_unrolled;
|
||||
} nir_loop;
|
||||
|
||||
|
|
|
@ -552,6 +552,7 @@ static nir_loop *
|
|||
clone_loop(clone_state *state, struct exec_list *cf_list, const nir_loop *loop)
|
||||
{
|
||||
nir_loop *nloop = nir_loop_create(state->ns);
|
||||
nloop->control = loop->control;
|
||||
nloop->partially_unrolled = loop->partially_unrolled;
|
||||
|
||||
nir_cf_node_insert_end(cf_list, &nloop->cf_node);
|
||||
|
|
|
@ -770,11 +770,20 @@ partial_unroll(nir_shader *shader, nir_loop *loop, unsigned trip_count)
|
|||
_mesa_hash_table_destroy(remap_table, NULL);
|
||||
}
|
||||
|
||||
/*
|
||||
* Returns true if we should unroll the loop, otherwise false.
|
||||
*/
|
||||
static bool
|
||||
is_loop_small_enough_to_unroll(nir_shader *shader, nir_loop_info *li)
|
||||
check_unrolling_restrictions(nir_shader *shader, nir_loop *loop)
|
||||
{
|
||||
unsigned max_iter = shader->options->max_unroll_iterations;
|
||||
if (loop->control == nir_loop_control_unroll)
|
||||
return true;
|
||||
|
||||
if (loop->control == nir_loop_control_dont_unroll)
|
||||
return false;
|
||||
|
||||
nir_loop_info *li = loop->info;
|
||||
unsigned max_iter = shader->options->max_unroll_iterations;
|
||||
unsigned trip_count =
|
||||
li->max_trip_count ? li->max_trip_count : li->guessed_trip_count;
|
||||
|
||||
|
@ -822,7 +831,7 @@ process_loops(nir_shader *sh, nir_cf_node *cf_node, bool *has_nested_loop_out)
|
|||
/* Don't attempt to unroll a second inner loop in this pass, wait until the
|
||||
* next pass as we have altered the cf.
|
||||
*/
|
||||
if (!progress) {
|
||||
if (!progress && loop->control != nir_loop_control_dont_unroll) {
|
||||
|
||||
/* Check for the classic
|
||||
*
|
||||
|
@ -848,7 +857,7 @@ process_loops(nir_shader *sh, nir_cf_node *cf_node, bool *has_nested_loop_out)
|
|||
unsigned num_lt = list_length(&loop->info->loop_terminator_list);
|
||||
if (!has_nested_loop && num_lt == 1 && !loop->partially_unrolled &&
|
||||
loop->info->guessed_trip_count &&
|
||||
is_loop_small_enough_to_unroll(sh, loop->info)) {
|
||||
check_unrolling_restrictions(sh, loop)) {
|
||||
partial_unroll(sh, loop, loop->info->guessed_trip_count);
|
||||
progress = true;
|
||||
}
|
||||
|
@ -857,7 +866,7 @@ process_loops(nir_shader *sh, nir_cf_node *cf_node, bool *has_nested_loop_out)
|
|||
if (has_nested_loop || !loop->info->limiting_terminator)
|
||||
goto exit;
|
||||
|
||||
if (!is_loop_small_enough_to_unroll(sh, loop->info))
|
||||
if (!check_unrolling_restrictions(sh, loop))
|
||||
goto exit;
|
||||
|
||||
if (loop->info->exact_trip_count_known) {
|
||||
|
|
Loading…
Reference in New Issue