zink: delete split_blocks pass

this is no longer useful

Reviewed-by: Dave Airlie <airlied@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/24634>

diff --git a/src/gallium/drivers/zink/zink_compiler.c b/src/gallium/drivers/zink/zink_compiler.c
index 3e4e247..e492f48 100644 (file)
--- a/src/gallium/drivers/zink/zink_compiler.c
+++ b/src/gallium/drivers/zink/zink_compiler.c
@@ -3176,73 +3176,6 @@ lower_64bit_vars(nir_shader *shader, bool doubles_only)
    return progress;
 }
 
-static bool
-split_blocks(nir_shader *nir)
-{
-   bool progress = false;
-   bool changed = true;
-   do {
-      progress = false;
-      nir_foreach_shader_out_variable(var, nir) {
-         const struct glsl_type *base_type = glsl_without_array(var->type);
-         nir_variable *members[32]; //can't have more than this without breaking NIR
-         if (!glsl_type_is_struct(base_type))
-            continue;
-         /* TODO: arrays? */
-         if (!glsl_type_is_struct(var->type) || glsl_get_length(var->type) == 1)
-            continue;
-         if (glsl_count_attribute_slots(var->type, false) == 1)
-            continue;
-         unsigned offset = 0;
-         for (unsigned i = 0; i < glsl_get_length(var->type); i++) {
-            members[i] = nir_variable_clone(var, nir);
-            members[i]->type = glsl_get_struct_field(var->type, i);
-            members[i]->name = (void*)glsl_get_struct_elem_name(var->type, i);
-            members[i]->data.location += offset;
-            offset += glsl_count_attribute_slots(members[i]->type, false);
-            nir_shader_add_variable(nir, members[i]);
-         }
-         nir_foreach_function_impl(impl, nir) {
-            bool func_progress = false;
-            nir_builder b = nir_builder_create(impl);
-            nir_foreach_block(block, impl) {
-               nir_foreach_instr_safe(instr, block) {
-                  switch (instr->type) {
-                  case nir_instr_type_deref: {
-                  nir_deref_instr *deref = nir_instr_as_deref(instr);
-                  if (!(deref->modes & nir_var_shader_out))
-                     continue;
-                  if (nir_deref_instr_get_variable(deref) != var)
-                     continue;
-                  if (deref->deref_type != nir_deref_type_struct)
-                     continue;
-                  nir_deref_instr *parent = nir_deref_instr_parent(deref);
-                  if (parent->deref_type != nir_deref_type_var)
-                     continue;
-                  deref->modes = nir_var_shader_temp;
-                  parent->modes = nir_var_shader_temp;
-                  b.cursor = nir_before_instr(instr);
-                  nir_def *dest = &nir_build_deref_var(&b, members[deref->strct.index])->def;
-                  nir_def_rewrite_uses_after(&deref->def, dest, &deref->instr);
-                  nir_instr_remove(&deref->instr);
-                  func_progress = true;
-                  break;
-                  }
-                  default: break;
-                  }
-               }
-            }
-            if (func_progress)
-               nir_metadata_preserve(impl, nir_metadata_none);
-         }
-         var->data.mode = nir_var_shader_temp;
-         changed = true;
-         progress = true;
-      }
-   } while (progress);
-   return changed;
-}
-
 static void
 zink_shader_dump(const struct zink_shader *zs, void *words, size_t size, const char *file)
 {
@@ -5482,9 +5415,6 @@ zink_shader_create(struct zink_screen *screen, struct nir_shader *nir,
       NIR_PASS_V(nir, nir_lower_subgroups, &subgroup_options);
    }
 
-   if (so_info && so_info->num_outputs)
-      NIR_PASS_V(nir, split_blocks);
-
    optimize_nir(nir, NULL);
    NIR_PASS_V(nir, nir_remove_dead_variables, nir_var_function_temp, NULL);
    NIR_PASS_V(nir, nir_lower_discard_if, (nir_lower_discard_if_to_cf |