[PATCH] D126273: [DAGCombiner][VP] Add DAGCombine for merging VP_FADD and VP_FMUL to VP_FMA.

[Yeting Kuo via Phabricator via llvm-commits]

fakepaper56 added a comment.

In D126273#3533580 <https://reviews.llvm.org/D126273#3533580>, @liaolucy wrote:

> When I test tsvc.
>
> The IR is:
>
>   @llvm.fmuladd.nxv2f32(<vscale x 2 x float>.....
>
> Not
>
>   @llvm.riscv.vfmul.nxv2f32.nxv2f32(<vscale x 2 x float> ......
>   @llvm.riscv.vfadd.nxv2f32.nxv2f32(<vscale x 2 x float> ......
>    
>
> So I am not sure, we need merge vp.fmul and vp.fadd to vp.fma.  maybe vp.fma is enough?

I am not sure what is tscv. Could you tell its full name?
But I think the case may happen when loop vectorizer generates vector prediction intrinsics.


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