Implement -print-dest-src-operands; Handle TEST8mi MIR

[bharsesh]

• Handle TEST[x]mi MIR to identify destination/source operands in MIR
• Implement -print-dest-src-operands to print the dest/source operands. This comes in handy when writing unit-tests as we add support for more instructions in X86InstrInfo::getDestAndSrc.

[niktesic]

Thanks for working on this! These kinds of debug prints are valuable for tracking locations. However, I think we should reconsider the format of our debug outputs for different locations (DestSrcPairs, TaintInfo...).

Personally, I would like to see all info about one location in the same line, like in regInfo MF attribute. Please, find the example below. Dest: { reg: $rbp, off: 12 } - register + offset Src1: { reg: $rax } - register Src2: { off: 3 } - immediate

Or, for TainList elements (TaintInfo) something like { reg: $rcx, off: 4 } (mem addr: 4)

What do you think about this?