[llvm-dev] Source Line/Filename + LLVM

[David Blaikie via llvm-dev]

Sometimes instructions don't have locations.

Especially after optimization - there are cases where there's no
singular/unambiguous location that would be accurate for an
instruction, so no location is provided.

On Tue, Sep 10, 2019 at 12:04 PM Jiwon Joung via llvm-dev
<llvm-dev at lists.llvm.org> wrote:
>
> Hello all,
> I have  a rather simple question.  We compiled our code with debug information and called Loc.getLineNumber() and Loc.getFilename() from the DILocation library. However, these methods return 0 and NIL, respectively for some calls. Most of the calls return valid filenames and src line numbers, but a couple return 0/NIL.
>
> What is happening here? Does anyone have any experience with this kind of behavior?
>
> Is it a problem with how I compiled my program? Is it an LLVM problem? Am I error handling incorrectly?
>
> Thanks,
>
>
> Jiwon
>
>
> --
> Jiwon Joung
> University of Michigan
>
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