[LLVMdev] [cfe-dev] want to intercept array dereferences

[Gábor Horváth]

Probably you should take a look at sema/TreeTransform.
2015. ápr. 9. du. 8:06 ezt írta ("Gry Gunvor" <gry.gunvor at gmail.com>):

> On Thu, Apr 9, 2015 at 10:47 AM, Jonathan Roelofs
> <jonathan at codesourcery.com> wrote:
> >> Again, I asked the LLVM list if, since LLVM is a typed assembly
> >> language, if I could just look for pointer plus offset followed by a
> >> dereference.  They seemed to suggest that looking for that idiom would
>
> > JFTR, we're one big community, and it's not as segregated into "the clang
> > devs" vs "the llvm devs" as you might think.
>
> On the LLVM list I was told "That would need to be in Clang" so I am
> writing the front-end list.
>
> > It's encouraged to cc both lists (as appropriate) when having these
> sorts of
> > discussions that span the interface between the two projects. This helps
> > give context to statements like "well I asked the other list", without
> > having to dig for that other message. At the very least you should
> provide a
> > link to the other discussion.
>
> Ok, in the future I will write both list, but I initially thought it
> was a purely backend question.  The other discussion starts here:
> http://lists.cs.uiuc.edu/pipermail/llvmdev/2015-April/084280.html
>
> So now that I am writing both lists: where can I intercept a
> Clang/LLVM compile that will catch expressions that locally look like
> a[n] or *(a+n) ?
>
> My guess is sometime after a[n] is lowered to *(a+n) (if you do that)
> and sometime before optimization passes start chewing on it.
>
> Gry
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