```
// llvm-objdump -d output (before)
400000: e8 0b 00 00 00 callq 11
400005: e8 0b 00 00 00 callq 11
// llvm-objdump -d output (after)
400000: e8 0b 00 00 00 callq 0x400010
400005: e8 0b 00 00 00 callq 0x400015
// GNU objdump -d. The lack of 0x is not ideal because the result cannot be re-assembled
400000: e8 0b 00 00 00 callq 400010
400005: e8 0b 00 00 00 callq 400015
```
In llvm-objdump, we pass the address of the next MCInst. Ideally we
should just thread the address of the current address, unfortunately we
cannot call X86MCCodeEmitter::encodeInstruction (X86MCCodeEmitter
requires MCInstrInfo and MCContext) to get the length of the MCInst.
MCInstPrinter::printInst has other callers (e.g llvm-mc -filetype=asm, llvm-mca) which set Address to 0.
They leave MCInstPrinter::PrintBranchImmAsAddress as false and this change is a no-op for them.
Reviewed By: jhenderson
Differential Revision: https://reviews.llvm.org/D76580
Now that D75203 has landed and baked for a few days, extend the basic approach to prefix padding as well. The patch itself is fairly straight forward.
For the moment, this patch adds the functional support and some basic testing there of, but defaults to not enabling prefix padding. I want to be able to phrase a separate patch which adds the target specific reasoning and test it cleanly. I haven't decided whether I want to common it with the nop logic or not.
Differential Revision: https://reviews.llvm.org/D75300
Fangrui Song