[llvm-dev] RFC: metadata attachments for global variables

[Peter Collingbourne via llvm-dev]

On Fri, May 6, 2016 at 1:21 PM, Duncan P. N. Exon Smith <
dexonsmith at apple.com> wrote:

>
> > On 2016-May-06, at 13:17, Peter Collingbourne <peter at pcc.me.uk> wrote:
> >
> > Hi all,
> >
> > I'd like to add support for metadata attachments for global variables in
> the same way as we did for functions.
> >
> > Syntax would be pretty simple:
> > @foo = global i32 0, !foo !0, !bar !1
> > (the extra commas are required to disambiguate from a named metadata on
> the next line)
>
> SGTM.
>
> > Benefits:
> > 1) Lets us reverse the DIGlobalVariable -> GlobalVariable edge, which
> should hopefully clear the way for removing the llvm.dbg.cu named
> metadata node.
>
> A little harder than it sounds (need to somehow support a GlobalVariable
> that is RAUW'ed with a ConstantInt), but I think this is important to do.
>

How can a GlobalVariable be replaced with a ConstantInt? Wouldn't that just
be an absolute address?

Thanks,
-- 
-- 
Peter
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.llvm.org/pipermail/llvm-dev/attachments/20160506/d021d672/attachment.html>