[LLVMdev] MDNodeFwdDecl

[Hui Zhang]

Hello, Duncan

Thanks for the help。

I've double checked my code and I did call finalize(), and it worked for
llvm 3.3, but failed on 3.6. Is there any other possibility that can lead
to this error ?

Thanks

On Tue, Jun 2, 2015 at 4:29 PM, Duncan P. N. Exon Smith <
dexonsmith at apple.com> wrote:

>
> > On 2015-Jun-02, at 11:14, Hui Zhang <wayne.huizhang at gmail.com> wrote:
> >
> > Any ideas ？
> >
> > Thanks
> >
> > On Tue, Jun 2, 2015 at 12:40 PM, Hui Zhang <wayne.huizhang at gmail.com>
> wrote:
> > Hello,
> >
> > I'm having this assertion fail when I was using DIBuilder to create the
> debug information:
> >
> > Expected no forward declarations!
> > !719
> >
> > The assertion condition is: !isa<MDNodeFwdDecl> (MD)
> >
> > So My questions are:
> > 1. What is exactly the MDNodeFwdDecl ? I saw it's in the latest release
> 3.6.1, but I also found this link
> http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20150119/253730.html
> > saying that MDNodeFwdDecl has been removed, and neither can I find class
> reference of it on the llvm doxgen website. So is it still valid ??
> >
> > 2. How and when will it be generated when I use DIBuilder module ?
>
> I suspect you've neglected to call `DIBuilder::finalize()`.
>
> On trunk, `isa<MDNodeFwdDecl>(N)` has become `N.isTemporary()`.  There
> are a number of temporaries created in the debug info graph to facilitate
> building cycles, and `DIBuilder::finalize()` (1) cleans them up, and (2)
> resolves other nodes involved in the cycles.
>
> It looks like we don't archive old doxygen files, but you should be
> able to build it yourself for old versions.
>



-- 
Best regards


Hui Zhang
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