DebugInfo from LLVM Instruction

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1

Hi all,

I used to extract the debug information from an LLVM Instruction in the following way:

if (MDNode *N = I->getMetadata(“dbg”)) { // Here I is an LLVM instruction
DILocation Loc(N); // DILocation is in DebugInfo.h
unsigned Line = Loc.getLineNumber();
StringRef File = Loc.getFilename();
StringRef Dir = Loc.getDirectory();
}

As specified also at http://llvm.org/docs/SourceLevelDebugging.html

However, looks like that the instruction " DILocation Loc(N);” is not valid anymore,
Since the DILocation class is changed.
Is that right?
How can I extract debug info (line, filename, etc.) from an instruction?

Thanks.
Best Regards,
Simone

2

+Duncan because I don’t remember exactly how things shifted

3

+Duncan because I don't remember exactly how things shifted

Hi all,

I used to extract the debug information from an LLVM Instruction in the following way:

if (MDNode *N = I->getMetadata("dbg")) { // Here I is an LLVM instruction
  DILocation Loc(N); // DILocation is in DebugInfo.h
  unsigned Line = Loc.getLineNumber();
  StringRef File = Loc.getFilename();
  StringRef Dir = Loc.getDirectory();
}

As specified also at Source Level Debugging with LLVM — LLVM 18.0.0git documentation

Fixed the docs in r244238.

Probably what you want these days is something like:

    if (DILocation *Loc = I->getDebugLoc()) {
      unsigned Line = Loc->getLine();
      StringRef File = Loc->getFilename();
      StringRef Dir = Loc->getDirectory();
    }