nir: add a new access flag to allow access in helper invocations

v2: Add nir_print support

Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Caio Oliveira <caio.oliveira@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/13718>

src/compiler/nir/nir.h

@@ -577,7 +577,7 @@ typedef struct nir_variable {
        * Access flags for memory variables (SSBO/global), image uniforms, and
        * bindless images in uniforms/inputs/outputs.
        */
-      unsigned access:8;
+      unsigned access:9;
 
       /**
        * Descriptor set binding for sampler or UBO.

src/compiler/nir/nir_print.c

@@ -508,8 +508,10 @@ print_var_decl(nir_variable *var, print_state *state)
    const char *const reorder = (access & ACCESS_CAN_REORDER) ? "reorderable " : "";
    const char *const stream_cache_policy = (access & ACCESS_STREAM_CACHE_POLICY) ?
                                            "stream-cache-policy " : "";
-   fprintf(fp, "%s%s%s%s%s%s%s", coher, volat, restr, ronly, wonly, reorder,
-           stream_cache_policy);
+   const char *const include_helpers = (access & ACCESS_INCLUDE_HELPERS) ?
+                                       "include-helpers " : "";
+   fprintf(fp, "%s%s%s%s%s%s%s%s", coher, volat, restr, ronly, wonly, reorder,
+           stream_cache_policy, include_helpers);
 
    if (glsl_get_base_type(glsl_without_array(var->type)) == GLSL_TYPE_IMAGE) {
       fprintf(fp, "%s ", util_format_short_name(var->data.image.format));

src/compiler/shader_enums.h

@@ -903,6 +903,9 @@ enum gl_access_qualifier
 
    /** Use as little cache space as possible. */
    ACCESS_STREAM_CACHE_POLICY = (1 << 7),
+
+   /** Execute instruction also in helpers. */
+   ACCESS_INCLUDE_HELPERS = (1 << 8),
 };
 
 /**