pan/bi: Lower umul_high

Also lower uadd_carry, which the mul_high lowering generates.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8358>

src/panfrost/bifrost/bifrost_compile.c

@@ -2162,6 +2162,8 @@ bi_optimize_nir(nir_shader *nir)
                 NIR_PASS(progress, nir, nir_opt_algebraic);
                 NIR_PASS(progress, nir, nir_opt_constant_folding);
 
+                NIR_PASS(progress, nir, nir_lower_alu);
+
                 if (lower_flrp != 0) {
                         bool lower_flrp_progress = false;
                         NIR_PASS(lower_flrp_progress,

src/panfrost/bifrost/bifrost_compile.h

@@ -69,6 +69,9 @@ static const nir_shader_compiler_options bifrost_nir_options = {
         .lower_doubles_options = nir_lower_dmod,
         /* TODO: Don't lower supported 64-bit operations */
         .lower_int64_options = ~0,
+        /* TODO: Use IMULD on v7 */
+        .lower_mul_high = true,
+        .lower_uadd_carry = true,
 
         .lower_bitfield_extract_to_shifts = true,
         .has_fsub = true,