+static ir_rvalue *
+clamp_to_array_bounds(void *mem_ctx, ir_rvalue *index, const glsl_type *type)
+{
+ assert(type->is_array());
+
+ const unsigned array_size = type->arrays_of_arrays_size();
+
+ ir_constant *max_index = new(mem_ctx) ir_constant(array_size - 1);
+ max_index->type = index->type;
+
+ ir_constant *zero = new(mem_ctx) ir_constant(0);
+ zero->type = index->type;
+
+ if (index->type->base_type == GLSL_TYPE_INT)
+ index = max2(index, zero);
+ index = min2(index, max_index);
+
+ return index;
+}
+