nir: add bindless to nir data

Reviewed-by: Iago Toral Quiroga <itoral@igalia.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>

src/compiler/glsl/glsl_to_nir.cpp

@@ -434,6 +434,7 @@ nir_visitor::visit(ir_variable *ir)
    var->data.index = ir->data.index;
    var->data.descriptor_set = 0;
    var->data.binding = ir->data.binding;
+   var->data.bindless = ir->data.bindless;
    var->data.offset = ir->data.offset;
    var->data.image.read_only = ir->data.memory_read_only;
    var->data.image.write_only = ir->data.memory_write_only;

src/compiler/nir/nir.h

@@ -249,6 +249,12 @@ typedef struct nir_variable {
        */
       unsigned fb_fetch_output:1;
 
+      /**
+       * Non-zero if this variable is considered bindless as defined by
+       * ARB_bindless_texture.
+       */
+      unsigned bindless:1;
+
       /**
        * \brief Layout qualifier for gl_FragDepth.
        *