[cfe-dev] Clang crash using SSE intrinsics

[Chris Lattner]

On Jan 31, 2010, at 7:09 PM, Mirabito, David wrote:

> Hi,
>
> I'm seeing the following crash when attempting the compile the  
> attached c file. I've reduced the original case as much as I could  
> and still keep the failing behaviour. Changing the 'buffer'  
> interactions (load or pointer increment), or removing the 'printv'  
> seem to make it go away, as does compiling with anything other that - 
> O0.
>
> Code is fairly recent SVN:
> 	llvm/trunk: 94955
> 	cfe/trunk: 94968
>  ( I think they're sensible revision IDs?)
>
> Please let me know if there's anything further I can do.

As a general note, please file bugzillas instead of emailing cfe-dev.   
That said, this was a great report.  From this, we fixed an optimizer  
crash:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20100201/095453.html

Fixed a serious performance issue, which will also allows the example  
to work:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20100201/095455.html

And I filed the original codegen crash:
http://llvm.org/bugs/show_bug.cgi?id=6204

Thanks!

-Chris