void onInsnAdded(SsaInsn insn){
  onSourcesChanged(insn,null);
  updateOneDefinition(insn,null);
}

void onInsnAdded ( SsaInsn insn ) { onSourcesChanged ( insn , null ) ; updateOneDefinition ( insn , null ) ; }
adds an insn to both the use and def lists . for use when adding a new insn to the method .
