broadcom/compiler: handle implicit uniform loads when optimizing constant alu

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/9681>

src/broadcom/compiler/vir_opt_constant_alu.c

@@ -71,10 +71,12 @@ opt_constant_add(struct v3d_compile *c, struct qinst *inst, uint32_t *values)
         }
 
         /* Remove the original ALU instruction and replace it with a uniform
-         * load.
+         * load. If the original instruction loaded an implicit uniform we
+         * need to replicate that in the new instruction.
          */
         struct qreg dst = inst->dst;
         struct qinst *mov = vir_MOV_dest(c, dst, unif);
+        mov->uniform = inst->uniform;
         vir_remove_instruction(c, inst);
         if (dst.file == QFILE_TEMP)
                 c->defs[dst.index] = mov;