[llvm] [SandboxVec][VecUtils] Lane Enumerator (PR #188355)

[via llvm-commits]

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@@ -304,6 +305,69 @@ class VecUtils {
                                      WhereIt, Ctx, "Unpack");
   }
 
+  /// Iterate over all lanes and Value pairs commulatively.
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vporpo wrote:

Yeah it's not clear what it means. I just dropped it, I think the example describes it better.

https://github.com/llvm/llvm-project/pull/188355