[Bug ld/18414] TOC optimization bug (ignoring data deps on addis/ld -> nop/ld opt)

[amodra at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=18414

Alan Modra <amodra at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|WONTFIX                     |---

--- Comment #4 from Alan Modra <amodra at gmail dot com> ---
Hmm, the dependency on r2 was added to gcc 2012-05-21.  Which means that people
using an older gcc with a newer ld are in trouble.  There needs to be some way
for ld to detect older gcc code, other than code scanning which is unreliable
and slow.

And no, ld does not currently scan code to find the second instruction.  The
pairing is by the relocations.

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