[llvm] r204094 - DebugInfo: Do not rely on the compilation dir (index 0) for files in line tables shared between compilation units

[David Blaikie]

Added some comments in r204358 - let me know if there's some better
phrasing there.

On Wed, Mar 19, 2014 at 4:06 PM, Eric Christopher <echristo at gmail.com> wrote:
>> +  if (!Asm->OutStreamer.hasRawTextSupport() || Singular)
>> +    Asm->OutStreamer.getContext().setMCLineTableCompilationDir(
>> +        NewCU->getUniqueID(), CompilationDir);
>>
>
> This could probably use a comment above it taken from the commit
> message. If you read the commit message it makes sense, however,
> otherwise it might not be obvious.
>
>>
>>
>> +; ASM: .file   1 "/tmp/dbginfo/a/a.cpp"
>> +; ASM: .file   2 "/tmp/dbginfo/b/b.cpp"
>> +
>
> Comment above here saying what you're expecting?
>
> -eric