[Bug libdw/30967] Discriminator in Dwarf_Line_s may exceed 24 bits

[vvvvvv at google dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=30967

--- Comment #4 from Aleksei Vetrov <vvvvvv at google dot com> ---
(In reply to Frank Ch. Eigler from comment #3)
> Is there some reason not to just bump up that bitfield width from :24 to :32
> or more for now, until a deeper analysis of llvm informs us as to how wide
> these discriminator codes can really be?

For me it is ok to bump that bitfield, but there is a warning in the code:

> All the flags and other bit fields should add up to 48 bits
> to give the whole struct a nice round size.

So this question should be directed to the author of this code: Roland McGrath
<roland@redhat.com>. I think there may be slight performance/memory issues, but
as a temporary solution it looks good.

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