[LLVMdev] SetCC tablegen pattern

Evan Cheng evan.cheng at apple.com
Sat Oct 25 16:17:17 PDT 2008

That's how ISD::SETCC is specified. If you want to change that for  
your target, you should custom lower these nodes to target nodes. Then  
you can specify your own SDNode with your own SDTypeProfile.


On Oct 24, 2008, at 4:31 PM, Villmow, Micah wrote:

> I am attempting to match setcc  using tablegen w/ the following  
> patterns:
> def FEQ         : Instruction<(outs GPRF32:$dst), (ins GPRF32:$src0,  
> GPRF32:$src1), “eq $dst, $src0, $src1”, [(set GPRF32:$dst, (seteq  
> GPRF32:$src0, GPRF32:$src1))]>;
> And it is failing stating that the result must be an integer. Is  
> there a way around this other than modifying TargetSelectionDAG.td?  
> Also, why is it assumed that all comparison results are always  
> integers?
> If I put GPRI32 as my destination register, it complains about  
> register classes not matching……
> Micah Villmow
> Systems Engineer
> Advanced Technology & Performance
> Advanced Micro Devices Inc.
> 4555 Great America Pkwy,
> Santa Clara, CA. 95054
> P: 408-572-6219
> F: 408-572-6596
> _______________________________________________
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