WIP: Constant fold indexAddrOff and readAddrOff primops
The rewrite rules for indexWord(8|16|32)AddrOff#
work, but the ones for readWord(8|16|32)AddrOff#
never seem to fire.
The rewrite rules for indexWord(8|16|32)AddrOff#
work, but the ones for readWord(8|16|32)AddrOff#
never seem to fire.