Fixes for idapro 6.4;  allins.h seems to not be something one should include directly, include intel.h instead.

Begin the loop identification process with the data structures and fundamental methods of back edge discovery.

Expand IDIOM 3 to include subtraction of small immediate from condition code; add IDIOM 13 for all NEGATEDPTR references; increase MEDS propagation of POINTER types.

Build RTLs for dryrun lib opcodes; fix uninit vars and clean up code; start mul by large const idiom recognition.

Do not allow DEF signedness to become mixed due to propagation of USE operand signedness within an RTL.