[LLVMdev] [llvm-commits] [llvm] r65296 - in /llvm/trunk: include/llvm/CodeGen/ lib/CodeGen/SelectionDAG/ lib/Target/CellSPU/ lib/Target/PowerPC/ lib/Target/X86/ test/CodeGen/X86/

[Nate Begeman]

On Feb 23, 2009, at 1:46 PM, Chris Lattner wrote:

> In my opinion, the proper direction for shuffles is:
>
> 1. Back out your patch.
> 2. Move the functionality of "is splat" etc to method somewhere, e.g.
> on SDNode.
> 3. Introduce a new ShuffleVectorSDNode that only has two SDValue
> operands (the two input vectors), but that also contains an array of
> ints in the node (not as operands).
> 4. Move the helper functions from #2 back into ShuffleVectorSDNode.

I'm working on #2 and #3 right now, and hope to land something in the  
next couple days.

Nate