[dmd-internals] [D-Programming-Language/dmd] 48ed15: Remove import of std.random:rand from test22

[Walter Bright]

On 8/22/2011 3:29 PM, Don Clugston wrote:
> On 16 August 2011 20:08, Brad Roberts<braddr at puremagic.com>  wrote:
>> On Tuesday, August 16, 2011 4:41:30 AM, Don Clugston wrote:
>>> I've added it to bugzilla.
>>> http://d.puremagic.com/issues/show_bug.cgi?id=6505
>>>
>>> On 16 August 2011 04:20, Jonathan M Davis<jmdavisProg at gmx.com>  wrote:
>>>> On Tuesday, August 16, 2011 04:16:10 Don Clugston wrote:
>>>>> And now it fails on all platforms with -O. Yikes.  It seems that the
>>>>> original bug was never actually fixed. It's an optimizer bug, too.
>>>>> We've been running with a defective test case for years.
> Walter -- are you working on fixing this?
> If not, I'll have a go at it. It looks like a failure to spill FP
> registers, and I don't think the backend currently has any capability
> to spill, so a fix is probably not easy.
> A quick hack fix would be to disable optimisation entirely when this happens.
>

The backend does spill the x87 stack when it overflows. I suspect the problem 
may lie in the scheduler. This is easily checked by disabling the scheduler and 
trying it.