[LLVMdev] Regression in 3.4's register allocator?

[Niklas Therning]

I think we have located the revision which fixes this regression: r206094
(or commit 6bb00df in llvm-mirror on GitHub). I have attached a patch which
can be applied to the current release_34 branch (tested against the
release_34 branch in llvm-mirror). With this patch the attached
reg-alloc-test.ll file doesn't fail with the "LLVM ERROR: ran out of
registers during register allocation" error any longer. I haven't run any
llvm tests to make sure this patch doesn't break anything else but as far
as I can see it doesn't at least break anything when used in RoboVM.

Is it too late to get this into 3.4.2? Is there anything else I can do to
make it easier for you to include this patch in 3.4.2 or the next possible
point release?



On Wed, May 14, 2014 at 3:25 PM, Renato Golin <renato.golin at linaro.org>
wrote:

> On 14 May 2014 14:15, Niklas Therning <niklas at therning.org> wrote:
> > I can confirm that this regression has been fixed in trunk. Should I
> report
> > this as a bug in 3.4?
>
> The 3.4.2 release is coming, you might want to consider finding the
> patches responsible for the fix and proposing it for back-porting.
>
> Please email Tom (cc'd) if you end up with a proposal.
>
> cheers,
> --renato
>
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