[LLVMdev] Accessing slot numbers of unnamed instructions (SlotTracker)

[Duncan Sands]

Hi Florian,

> I'm currently trying to figure out a method for providing a unique
> identification of an llvm::Instruction that is consistent with the output of an
> AssemblyWriter. Obviously this is easy for named instructions: In this case
> the identification is the name itself, but I'd like to have the same thing for
> unnamed instructions.
>
> If I understand the code in AssemblyWriter.cpp correctly, AssemblyWriter uses
> SlotTracker to keep track of the numbers used for unnamed instructions.
> Unfortunately for me SlotTracker is missing from LLVM's public header files. Is
> there any other way to retrieve a slot number for an Instruction that is
> consistent with the numbers assigned by an existing AssemblyWriter instance.

why do you want this?  The short answer is that these numbers are only available
in the AssemblyWriter, so you would either have to duplicate the logic that it
uses, or put some kind of hook in AssemblyWriter.

Ciao, Duncan.