[PATCH] D95676: [VPlan][NFC] Introduce constructors for VPIteration

[Florian Hahn via Phabricator via llvm-commits]

fhahn added inline comments.


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Comment at: llvm/lib/Transforms/Vectorize/VPlan.h:101
+
+  VPIteration() : Part(0), Lane(0) {}
+  VPIteration(unsigned Part, unsigned Lane) : Part(Part), Lane(Lane) {}
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sdesmalen wrote:
> From what I can see, most uses of VPIteration() in this patch are where it explicitly tries to get the first iteration. I think it's better to drop the implicit '0, 0' constructor, so that all VPIteration objects are explicitly constructed with a specific lane and part. Perhaps you can add a named method to return the first lane, e.g.
> 
>   static VPIteration getFirstLane() { return VPIteration(0, 0); }
I also think it's better to just explicitly instantiate the VPIteration, rather than having the default constructor defaulting to the first lane. Not sure about adding a helper, because `VPIteration(0, 0)` is shorter than ` VPIteration::getFirstLane` and as explicit, especially because all other places also pass lane & part explicitly.


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  https://reviews.llvm.org/D95676/new/

https://reviews.llvm.org/D95676