* iselIntExpr_AMode_wrk: generate correct code for the case
  "Sub64(expr,simm9)."

* handle 1Uto64(arbitrary-expression)



git-svn-id: svn://svn.valgrind.org/vex/trunk@2834 8f6e269a-dfd6-0310-a8e1-e2731360e62c