Comparing their PrimTypes isn't enough in this case. We can have a floating cast here as well.
Implement `+`, `-`, `*`, `/` , `%`, `&`, `|`, `^`, `<<`, `>>` and compound assignment operator. --------- Signed-off-by: yronglin <yronglin777@gmail.com>
"Interp" clashes with the clang interpreter and people often confuse this.