[PR debug/47590] rework md option overriding to delay var-tracking

[Alexandre Oliva]

On May  4, 2011, Bernd Schmidt <bernds@codesourcery.com> wrote:

> This comment looks very weird when added to ia64_option_override
> (likewise for other targets). Is there a reason it's not true anymore?

Dunno, but the patch definitely didn't work any more when I retested it.
Maybe it didin't work when I first tested it, I don't recall having
actually looked at debug dumps then, but it was a while ago.

Here's an alternate approach that works now.  Regstrapped on
32- and 64-bit x86-linux-gnu, and cross-built on x86_64-linux-gnu to the
4 affected platforms, checking manually the proper presence of debug
insns and location notes at the expected dump files.

Ok to install?

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-- 
Alexandre Oliva, freedom fighter    http://FSFLA.org/~lxoliva/
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