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nir: Support deref instructions in loop_analyze

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Reviewed-by: Caio Marcelo de Oliveira Filho <caio.oliveira@intel.com>
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 15:21:36 -07:00
parent e786fcf777
commit 414148cdc1
1 changed files with 47 additions and 4 deletions
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51
src/compiler/nir/nir_loop_analyze.c
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@ -623,8 +623,8 @@ find_trip_count(loop_info_state *state)
* due to array access heuristics.
*/
static bool
force_unroll_array_access(loop_info_state *state, nir_shader *ns,
nir_deref_var *variable)
force_unroll_array_access_var(loop_info_state *state, nir_shader *ns,
nir_deref_var *variable)
{
nir_deref *tail = &variable->deref;
@ -664,6 +664,37 @@ force_unroll_array_access(loop_info_state *state, nir_shader *ns,
return false;
}
static bool
force_unroll_array_access(loop_info_state *state, nir_shader *ns,
nir_deref_instr *deref)
{
for (nir_deref_instr *d = deref; d; d = nir_deref_instr_parent(d)) {
if (d->deref_type != nir_deref_type_array)
continue;
assert(d->arr.index.is_ssa);
nir_loop_variable *array_index = get_loop_var(d->arr.index.ssa, state);
if (array_index->type != basic_induction)
continue;
nir_deref_instr *parent = nir_deref_instr_parent(d);
assert(glsl_type_is_array(parent->type) ||
glsl_type_is_matrix(parent->type));
if (glsl_get_length(parent->type) == state->loop->info->trip_count) {
state->loop->info->force_unroll = true;
return true;
}
if (deref->mode & state->indirect_mask) {
state->loop->info->force_unroll = true;
return true;
}
}
return false;
}
static bool
force_unroll_heuristics(loop_info_state *state, nir_shader *ns,
nir_block *block)
@ -683,10 +714,23 @@ force_unroll_heuristics(loop_info_state *state, nir_shader *ns,
unsigned num_vars =
nir_intrinsic_infos[intrin->intrinsic].num_variables;
for (unsigned i = 0; i < num_vars; i++) {
if (force_unroll_array_access(state, ns, intrin->variables[i]))
if (force_unroll_array_access_var(state, ns, intrin->variables[i]))
return true;
}
}
if (intrin->intrinsic == nir_intrinsic_load_deref ||
intrin->intrinsic == nir_intrinsic_store_deref ||
intrin->intrinsic == nir_intrinsic_copy_deref) {
if (force_unroll_array_access(state, ns,
nir_src_as_deref(intrin->src[0])))
return true;
if (intrin->intrinsic == nir_intrinsic_copy_deref &&
force_unroll_array_access(state, ns,
nir_src_as_deref(intrin->src[1])))
return true;
}
}
return false;
@ -827,7 +871,6 @@ void
nir_loop_analyze_impl(nir_function_impl *impl,
nir_variable_mode indirect_mask)
{
nir_assert_lowered_derefs(impl->function->shader, nir_lower_load_store_derefs);
nir_index_ssa_defs(impl);
foreach_list_typed(nir_cf_node, node, node, &impl->body)
process_loops(node, indirect_mask);