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nir: Remove deref chain support from lower_atomics

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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 16:46:09 -07:00
parent 4b0ea65333
commit 81f29d6d33
1 changed files with 2 additions and 144 deletions
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146
src/compiler/glsl/gl_nir_lower_atomics.c
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@@ -38,146 +38,6 @@
* that directly store the buffer index and byte offset
*/
static bool
lower_var_instr(nir_intrinsic_instr *instr,
const struct gl_shader_program *shader_program,
nir_shader *shader, bool use_binding_as_idx)
{
nir_intrinsic_op op;
switch (instr->intrinsic) {
case nir_intrinsic_atomic_counter_read_var:
op = nir_intrinsic_atomic_counter_read;
break;
case nir_intrinsic_atomic_counter_inc_var:
op = nir_intrinsic_atomic_counter_inc;
break;
case nir_intrinsic_atomic_counter_dec_var:
op = nir_intrinsic_atomic_counter_dec;
break;
case nir_intrinsic_atomic_counter_add_var:
op = nir_intrinsic_atomic_counter_add;
break;
case nir_intrinsic_atomic_counter_min_var:
op = nir_intrinsic_atomic_counter_min;
break;
case nir_intrinsic_atomic_counter_max_var:
op = nir_intrinsic_atomic_counter_max;
break;
case nir_intrinsic_atomic_counter_and_var:
op = nir_intrinsic_atomic_counter_and;
break;
case nir_intrinsic_atomic_counter_or_var:
op = nir_intrinsic_atomic_counter_or;
break;
case nir_intrinsic_atomic_counter_xor_var:
op = nir_intrinsic_atomic_counter_xor;
break;
case nir_intrinsic_atomic_counter_exchange_var:
op = nir_intrinsic_atomic_counter_exchange;
break;
case nir_intrinsic_atomic_counter_comp_swap_var:
op = nir_intrinsic_atomic_counter_comp_swap;
break;
default:
return false;
}
if (instr->variables[0]->var->data.mode != nir_var_uniform &&
instr->variables[0]->var->data.mode != nir_var_shader_storage &&
instr->variables[0]->var->data.mode != nir_var_shared)
return false; /* atomics passed as function arguments can't be lowered */
void *mem_ctx = ralloc_parent(instr);
unsigned uniform_loc = instr->variables[0]->var->data.location;
unsigned idx = use_binding_as_idx ?
instr->variables[0]->var->data.binding :
shader_program->data->UniformStorage[uniform_loc].opaque[shader->info.stage].index;
nir_intrinsic_instr *new_instr = nir_intrinsic_instr_create(mem_ctx, op);
nir_intrinsic_set_base(new_instr, idx);
nir_load_const_instr *offset_const =
nir_load_const_instr_create(mem_ctx, 1, 32);
offset_const->value.u32[0] = instr->variables[0]->var->data.offset;
nir_instr_insert_before(&instr->instr, &offset_const->instr);
nir_ssa_def *offset_def = &offset_const->def;
nir_deref *tail = &instr->variables[0]->deref;
while (tail->child != NULL) {
nir_deref_array *deref_array = nir_deref_as_array(tail->child);
tail = tail->child;
unsigned child_array_elements = tail->child != NULL ?
glsl_get_aoa_size(tail->type) : 1;
offset_const->value.u32[0] += deref_array->base_offset *
child_array_elements * ATOMIC_COUNTER_SIZE;
if (deref_array->deref_array_type == nir_deref_array_type_indirect) {
nir_load_const_instr *atomic_counter_size =
nir_load_const_instr_create(mem_ctx, 1, 32);
atomic_counter_size->value.u32[0] = child_array_elements * ATOMIC_COUNTER_SIZE;
nir_instr_insert_before(&instr->instr, &atomic_counter_size->instr);
nir_alu_instr *mul = nir_alu_instr_create(mem_ctx, nir_op_imul);
nir_ssa_dest_init(&mul->instr, &mul->dest.dest, 1, 32, NULL);
mul->dest.write_mask = 0x1;
nir_src_copy(&mul->src[0].src, &deref_array->indirect, mul);
mul->src[1].src.is_ssa = true;
mul->src[1].src.ssa = &atomic_counter_size->def;
nir_instr_insert_before(&instr->instr, &mul->instr);
nir_alu_instr *add = nir_alu_instr_create(mem_ctx, nir_op_iadd);
nir_ssa_dest_init(&add->instr, &add->dest.dest, 1, 32, NULL);
add->dest.write_mask = 0x1;
add->src[0].src.is_ssa = true;
add->src[0].src.ssa = &mul->dest.dest.ssa;
add->src[1].src.is_ssa = true;
add->src[1].src.ssa = offset_def;
nir_instr_insert_before(&instr->instr, &add->instr);
offset_def = &add->dest.dest.ssa;
}
}
new_instr->src[0].is_ssa = true;
new_instr->src[0].ssa = offset_def;
/* Copy the other sources, if any, from the original instruction to the new
* instruction.
*/
for (unsigned i = 0; i < nir_intrinsic_infos[instr->intrinsic].num_srcs; i++)
nir_src_copy(&new_instr->src[i + 1], &instr->src[i], new_instr);
if (instr->dest.is_ssa) {
nir_ssa_dest_init(&new_instr->instr, &new_instr->dest,
instr->dest.ssa.num_components, 32, NULL);
nir_ssa_def_rewrite_uses(&instr->dest.ssa,
nir_src_for_ssa(&new_instr->dest.ssa));
} else {
nir_dest_copy(&new_instr->dest, &instr->dest, mem_ctx);
}
nir_instr_insert_before(&instr->instr, &new_instr->instr);
nir_instr_remove(&instr->instr);
return true;
}
static bool
lower_deref_instr(nir_builder *b, nir_intrinsic_instr *instr,
const struct gl_shader_program *shader_program,
@@ -282,6 +142,8 @@ gl_nir_lower_atomics(nir_shader *shader,
{
bool progress = false;
nir_assert_unlowered_derefs(shader, nir_lower_atomic_counter_derefs);
nir_foreach_function(function, shader) {
if (!function->impl)
continue;
@@ -296,10 +158,6 @@ gl_nir_lower_atomics(nir_shader *shader,
if (instr->type != nir_instr_type_intrinsic)
continue;
impl_progress |= lower_var_instr(nir_instr_as_intrinsic(instr),
shader_program, shader,
use_binding_as_idx);
impl_progress |= lower_deref_instr(&build,
nir_instr_as_intrinsic(instr),
shader_program, shader,