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From: Jon Turney <jon.turney@dronecode.org.uk>
Message-ID: <4b689b5f-28ae-ecdb-7f41-13430138ac30@dronecode.org.uk>
Date: Mon, 20 Jun 2016 13:58:27 +0100
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On 09/06/2016 23:01, Yaakov Selkowitz wrote:
> On 6/6/2016 9:27 AM, Jon Turney wrote:
>>
>> That sounds exactly like what I see with llvm svn r251761 [1] backported
>> to 3.7.1 (without which we use the x86_64 loader on x86, rather than
>> reporting an error, due to an interesting use of __builtin_undefined,
>> with hilarious consequences)
>>
>> I guess the output of the JIT code is ending up the wrong place as well,
>> or something...
>
> For the record, Jon seems to have tracked this down, and his fix is in
> llvm-3.7.1-2.  I can only imagine what "fun" he had debugging this,
> particularly on the address-starved 32-bit platform.

There's a few more details in the llvm bug I raised [1].

This is now fixed in llvm master, but will need patching in llvm 3.8, if 
that is packaged.

[1] https://llvm.org/bugs/show_bug.cgi?id=28111

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