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nir: Rework gather_info to entirely use deref instructions

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Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Acked-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Jason Ekstrand
2018-03-26 15:53:17 -07:00
parent b1a18b8797
commit 69866af357
1 changed files with 14 additions and 28 deletions
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42
src/compiler/nir/nir_gather_info.c
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@@ -113,23 +113,19 @@ mark_whole_variable(nir_shader *shader, nir_variable *var, bool is_output_read)
}
static unsigned
get_io_offset(nir_deref_var *deref, bool is_vertex_input)
get_io_offset(nir_deref_instr *deref, bool is_vertex_input)
{
unsigned offset = 0;
nir_deref *tail = &deref->deref;
while (tail->child != NULL) {
tail = tail->child;
for (nir_deref_instr *d = deref; d; d = nir_deref_instr_parent(d)) {
if (d->deref_type == nir_deref_type_array) {
nir_const_value *const_index = nir_src_as_const_value(d->arr.index);
if (tail->deref_type == nir_deref_type_array) {
nir_deref_array *deref_array = nir_deref_as_array(tail);
if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
if (!const_index)
return -1;
}
offset += glsl_count_attribute_slots(tail->type, is_vertex_input) *
deref_array->base_offset;
offset += glsl_count_attribute_slots(d->type, is_vertex_input) *
const_index->u32[0];
}
/* TODO: we can get the offset for structs here see nir_lower_io() */
}
@@ -145,9 +141,9 @@ get_io_offset(nir_deref_var *deref, bool is_vertex_input)
* occurs, then nothing will be marked and false will be returned.
*/
static bool
try_mask_partial_io(nir_shader *shader, nir_deref_var *deref, bool is_output_read)
try_mask_partial_io(nir_shader *shader, nir_variable *var,
nir_deref_instr *deref, bool is_output_read)
{
nir_variable *var = deref->var;
const struct glsl_type *type = var->type;
if (nir_is_per_vertex_io(var, shader->info.stage)) {
@@ -232,29 +228,19 @@ gather_intrinsic_info(nir_intrinsic_instr *instr, nir_shader *shader,
case nir_intrinsic_interp_deref_at_centroid:
case nir_intrinsic_interp_deref_at_sample:
case nir_intrinsic_interp_deref_at_offset:
case nir_intrinsic_interp_var_at_centroid:
case nir_intrinsic_interp_var_at_sample:
case nir_intrinsic_interp_var_at_offset:
case nir_intrinsic_load_deref:
case nir_intrinsic_load_var:
case nir_intrinsic_store_deref:
case nir_intrinsic_store_var: {
nir_deref_var *deref;
if (nir_intrinsic_infos[instr->intrinsic].num_variables > 0)
deref = instr->variables[0];
else
deref = nir_deref_instr_to_deref(nir_src_as_deref(instr->src[0]), dead_ctx);
nir_variable *var = deref->var;
case nir_intrinsic_store_deref:{
nir_deref_instr *deref = nir_src_as_deref(instr->src[0]);
nir_variable *var = nir_deref_instr_get_variable(deref);
if (var->data.mode == nir_var_shader_in ||
var->data.mode == nir_var_shader_out) {
bool is_output_read = false;
if (var->data.mode == nir_var_shader_out &&
(instr->intrinsic == nir_intrinsic_load_var ||
instr->intrinsic == nir_intrinsic_load_deref))
instr->intrinsic == nir_intrinsic_load_deref)
is_output_read = true;
if (!try_mask_partial_io(shader, deref, is_output_read))
if (!try_mask_partial_io(shader, var, deref, is_output_read))
mark_whole_variable(shader, var, is_output_read);
/* We need to track which input_reads bits correspond to a