Using __attribute__((overloadable)) when declaring nir ops with
variable-width params in clc results in their symbol names being (IA64)
mangled; this change enables the mangled names to be handled when later
lowering the calls.
Signed-off-by: Simon Perretta <simon.perretta@imgtec.com>
Acked-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/36873>