[LLVMdev] Dejagnu Tests

[Dale Johannesen]

On Jul 1, 2008, at 10:11 AMPDT, Edd Barrett wrote:

> Hi,
>
> Tanya M. Lattner wrote:
>>> We were wondering if *all* of the dejagnu tests should pass (in the
>>> sense that no result should be unexpected), because we have a few  
>>> failed
>>> tests on our build.
>>
>> make check should always be clean. However, sometimes people do  
>> commit
>> changes that impact platforms they are not able to test on and we  
>> do have
>> the occasional failure.
>>
>> If you have failures, please file a bug with the test case that is
>> failing, the command that fails, and the bc file if applicable.  
>> Basically,
>> as much information as you can provide since it may not be a target  
>> that
>> the majority of the developers have access to.
>
> The target is OpenBSD/i386 for now and later sparc64 and amd64. Most  
> of
> the errors are to do with GNU grep syntax not being compatible with  
> BSD
> grep. I would not be suprised if solaris and FreeBSD were impacted by
> this too. The solution is to use egrep we *think*.
>
> There are a couple we are scratching our head on. One being the  
> negative
> zero test. It seems the display function in llvm-dis (probably printf)
> is truncating the minus sign from the output deeming it pointless in  
> the
> case of zero, whereas on a linux box it does not. Not sure quite  
> what to
> do there yet, as -0 == 0 mathematically, but not in floating point
> representation.

The conversion is done by ftostr which uses sprintf("%20.6e").
We may need to special-case negative zero there.

> There were some others too, but off of the top of my head I cant  
> remember.
>
> We should be able to send you guys a bunch of patches for testing  
> soon.
> I think we are down to 6 failed tests now.
>
> The build itself is now reliable on OpenBSD/i386 after patching  
> tablegen :)
>
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