spirv: Only split blocks

Instead of splitting every per-vertex struct, just split the ones that
are actually blocks.  The reason for the split is so that we have
separate variables for separate locations, qualifiers, and builtin
decorations.  The vulkan spec only allows these on members of blocks.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>

diff --git a/src/compiler/spirv/vtn_variables.c b/src/compiler/spirv/vtn_variables.c
index b6a5880..37dfcf1 100644 (file)
--- a/src/compiler/spirv/vtn_variables.c
+++ b/src/compiler/spirv/vtn_variables.c
@@ -1626,8 +1626,12 @@ var_decoration_cb(struct vtn_builder *b, struct vtn_value *val, int member,
    } else {
       if (vtn_var->var) {
          if (vtn_var->var->num_members == 0) {
-            assert(member == -1);
-            apply_var_decoration(b, &vtn_var->var->data, dec);
+            /* We call this function on types as well as variables and not all
+             * struct types get split so we can end up having stray member
+             * decorations; just ignore them.
+             */
+            if (member == -1)
+               apply_var_decoration(b, &vtn_var->var->data, dec);
          } else if (member >= 0) {
             /* Member decorations must come from a type */
             assert(val->value_type == vtn_value_type_type);
@@ -2040,7 +2044,8 @@ vtn_create_variable(struct vtn_builder *b, struct vtn_value *val,
       var->var->data.mode = nir_mode;
       var->var->data.patch = var->patch;
 
-      if (glsl_type_is_struct(interface_type->type)) {
+      if (interface_type->base_type == vtn_base_type_struct &&
+          interface_type->block) {
          /* It's a struct.  Set it up as per-member. */
          var->var->num_members = glsl_get_length(interface_type->type);
          var->var->members = rzalloc_array(var->var, struct nir_variable_data,