---
src/glsl/nir/nir_lower_phis_to_scalar.c | 25 ++++++++++++++++---------
1 file changed, 16 insertions(+), 9 deletions(-)
diff --git a/src/glsl/nir/nir_lower_phis_to_scalar.c
b/src/glsl/nir/nir_lower_phis_to_scalar.c
index aa124d9..909a743 100644
--- a/src/glsl/nir/nir_lower_phis_to_scalar.c
+++ b/src/glsl/nir/nir_lower_phis_to_scalar.c
@@ -41,6 +41,8 @@ struct lower_phis_to_scalar_state {
* scalarizable or non-null for scalarizable.
*/
struct hash_table *phi_table;
+
+ bool progress;
};
static bool
@@ -192,6 +194,8 @@ lower_phis_to_scalar_block(nir_block *block, void
*void_state)
if (!should_lower_phi(phi, state))
continue;
+ state->progress = true;
+
/* Create a vecN operation to combine the results. Most of these
* will be redundant, but copy propagation should clean them up for
* us. No need to add the complexity here.
@@ -262,8 +266,8 @@ lower_phis_to_scalar_block(nir_block *block, void
*void_state)
return true;
}
-static void
-lower_phis_to_scalar_impl(nir_function_impl *impl)
+static bool
+lower_phis_to_scalar_impl(nir_function_impl *impl, void *unused)
{
struct lower_phis_to_scalar_state state;
@@ -271,13 +275,13 @@ lower_phis_to_scalar_impl(nir_function_impl *impl)
state.dead_ctx = ralloc_context(NULL);
state.phi_table = _mesa_hash_table_create(state.dead_ctx,
_mesa_hash_pointer,
_mesa_key_pointer_equal);
+ state.progress = false;
nir_foreach_block(impl, lower_phis_to_scalar_block, &state);
- nir_metadata_preserve(impl, nir_metadata_block_index |
- nir_metadata_dominance);
-
ralloc_free(state.dead_ctx);
+
+ return state.progress;
}
/** A pass that lowers vector phi nodes to scalar
@@ -287,11 +291,14 @@ lower_phis_to_scalar_impl(nir_function_impl *impl)
* instance, if one of the sources is a non-scalarizable vector, then we
* don't bother lowering because that would generate hard-to-coalesce movs.
*/
+static const nir_pass nir_lower_phis_to_scalar_pass = {
+ NULL, /* shader_pass_func */
+ lower_phis_to_scalar_impl,
+ nir_metadata_block_index | nir_metadata_dominance,
+};
+
void
nir_lower_phis_to_scalar(nir_shader *shader)
{
- nir_foreach_overload(shader, overload) {
- if (overload->impl)
- lower_phis_to_scalar_impl(overload->impl);
- }
+ nir_shader_run_pass(shader, &nir_lower_phis_to_scalar_pass);
}
--
2.5.0.400.gff86faf
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