[LLVMdev] Modifying debug information through llvm pass

[Riyad Parvez]

Hi All,

I want to change debug information of an llvm instruction so that the 
modified debug info is subsequently passed to executable binary. So if I 
use "addr2line" utility on the binary, it will return my modified debug 
information.

I've tried to change by using the following code snippet:

    MDNode *N = Inst->getMetadata("dbg");
    DebugLoc Loc = DebugLoc::get(newLine, newCol, N);
    Inst->setDebugLoc(Loc);

I read the DebugLoc back by using

    const DebugLoc D = Inst->getDebugLoc();
    unsigned Line = D.getLine();
    outs() << Line <<"\n";

But I can't set the debug info correctly. How can I change the debug 
info correctly through llvm pass?

Thanks
Riyad
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