[llvm] [LoopVectorize] Generate wide active lane masks (PR #147535)

[David Sherwood via llvm-commits]

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@@ -3250,6 +3258,9 @@ class VPActiveLaneMaskPHIRecipe : public VPHeaderPHIRecipe {
 
   VP_CLASSOF_IMPL(VPDef::VPActiveLaneMaskPHISC)
 
+  unsigned getUnrollPart() { return UnrollPart; }
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david-arm wrote:

Would be good to add the `const` keyword after `()`.

https://github.com/llvm/llvm-project/pull/147535