Revert "Improved DCA by using bit information."

This reverts commit 59435e3b40542bba3a5141a1fd24da71ffeafd01.
Counterexample: (x & 0xFF00) + 0xFF, with a 16-bit x.
Reject undefined bit information.

This fixes opt/fehler234.c.
rework AMD64_OP_CALL_XXX and AMD64_OP_UNOP_XXX and fix IJmp address mode matching
amd64: imulb can only be used with rax - reg operands