[cfe-dev] Clang crash using SSE intrinsics

Chris Lattner clattner at apple.com
Mon Feb 1 18:46:24 PST 2010

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  

Fixed a serious performance issue, which will also allows the example  
to work:

And I filed the original codegen crash:



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