nir/opt_algebraic: add more 64-bit patterns

Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/31964>

src/compiler/nir/nir_opt_algebraic.py

@@ -1963,6 +1963,9 @@ optimizations.extend([
    (('u2u32', ('iadd(is_used_once)', 'a@64', b)),
     ('iadd', ('u2u32', a), ('u2u32', b))),
 
+   (('u2u32', ('imul(is_used_once)', 'a@64', b)),
+    ('imul', ('u2u32', a), ('u2u32', b))),
+
    # Redundant trip through 8-bit
    (('i2i16', ('u2u8', ('iand', 'a@16', 1))), ('iand', 'a@16', 1)),
    (('u2u16', ('u2u8', ('iand', 'a@16', 1))), ('iand', 'a@16', 1)),