nir/schedule: return progress and fix metadata

Tracking if we changed the shader is somewhat complicated, so assume
we always do.

Reviewed-by: Emma Anholt <emma@anholt.net>
Reviewed-by: Konstantin Seurer <konstantin.seurer@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36291>

src/compiler/nir/nir_schedule.c

@@ -1270,7 +1270,7 @@ nir_schedule_validate_uses(nir_schedule_scoreboard *scoreboard)
  * free a register immediately.  The amount below the limit is up to you to
  * tune.
  */
-void
+bool
 nir_schedule(nir_shader *shader,
              const nir_schedule_options *options)
 {
@@ -1286,9 +1286,14 @@ nir_schedule(nir_shader *shader,
       nir_foreach_block(block, impl) {
          nir_schedule_block(scoreboard, block);
       }
+
+      nir_progress(true, impl, nir_metadata_control_flow |
+                               nir_metadata_divergence |
+                               nir_metadata_live_defs);
    }
 
    nir_schedule_validate_uses(scoreboard);
 
    ralloc_free(scoreboard);
+   return true;
 }

src/compiler/nir/nir_schedule.h

@@ -83,7 +83,7 @@ typedef struct nir_schedule_options {
 
 } nir_schedule_options;
 
-void nir_schedule(nir_shader *shader, const nir_schedule_options *options);
+bool nir_schedule(nir_shader *shader, const nir_schedule_options *options);
 
 #ifdef __cplusplus
 } /* extern "C" */