[RFC 0/3] Remove unused operators OP_BITSTRING TERNOP_SLICE_COUNT and TYPE_CODE_BITSTRING

[Yao Qi]

Hi,
This patch set is a follow-up to my prosal here,

  Remove OP_LABELED TERNOP_SLICE_COUNT and OP_BITSTRING?
  http://sourceware.org/ml/gdb/2012-08/msg00018.html

However, OP_LABELED is not removed in this patch set, because it is not
obviously correct to do so, and more thoughts are needed.  Removal of
TYPE_CODE_BITSTRING is added in this set.

I don't put much words in each patch, because each of them just simply
removes unused bits.  Regression tested on x86_64-unknow-linux.