[LLVMdev] SelectionDAG scalarizes vector operations.

[Chris Lattner]

On Feb 8, 2012, at 12:42 PM, David A. Greene wrote:

> Chris Lattner <clattner at apple.com> writes:
> 
>> Would it make sense to start something like a
>> lib/Target/README-Vectors.txt file with a collection of small examples
>> of pessimizations?  We've successfully used text files like this to
>> track "laundry lists" like this.  High priority problems (e.g. the
>> sorts that Duncan is pointing out) makes sense to track in bugzilla,
>> of course.
> 
> Sounds fine to me, but is there any reason *not* to file bugs other than
> increasing the number of bugs in Bugzilla?  Bugzilla is always where I
> go first to see if a problem has already been identified.

Personally, I think that bugzilla is overkill (i.e. the wrong answer) for a long tail of random micro-optimizations.  Much of the stuff in X86/README has been in there for years.  Having it in bugzilla would just clutter things up.

-Chris