llvm dev - Jul 2016 - Match LLVM IR back to assembly

Hi all,

I am trying to write a pass which matches LLVM IR back to assembly in order
to track PCs corresponding to certain LLVM IR instructions on an x86-64
machine. LLVM's debug-ir options is/was doing exactly this, but on older
versions (i.e. pre-3.6) it crashes while on newer versions it has been
deprecated.

I've recently tried debug-ir with 3.4 and 3.5, but this assert fails:
llc: llvm-3.4/lib/CodeGen/AsmPrinter/DwarfDebug.cpp:1614: void
llvm::DwarfDebug::beginFunction(const llvm::MachineFunction*): Assertion
`TheCU && "Unable to find compile unit!"' failed

There is a previous discussion on this, yet no fix:
https://groups.google.com/forum/#!topic/llvm-dev/Oawy2-_lqCU


Any tips for how to solve this would be greatly appreciated.

Thank you,
-Bogdan.
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