nir: add implicit_sized_array data field

Will be used in following patches for glsl linking validation.

Acked-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28538>

src/compiler/glsl/glsl_to_nir.cpp

@@ -444,6 +444,7 @@ nir_visitor::visit(ir_variable *ir)
    var->data.compact = false;
    var->data.used = ir->data.used;
    var->data.max_array_access = ir->data.max_array_access;
+   var->data.implicit_sized_array = ir->data.implicit_sized_array;
 
    switch(ir->data.mode) {
    case ir_var_auto:

src/compiler/nir/nir.h

@@ -606,6 +606,9 @@ typedef struct nir_variable {
        */
       unsigned explicit_location : 1;
 
+      /* Was the array implicitly sized during linking */
+      unsigned implicit_sized_array : 1;
+
       /**
        * Highest element accessed with a constant array index
        *