[llvm-branch-commits] [llvm] [LV] Mask off possibly aliasing vector lanes (PR #100579)

[Benjamin Maxwell via llvm-branch-commits]

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@@ -427,6 +428,29 @@ Value *VPInstruction::generate(VPTransformState &State) {
                                    {PredTy, ScalarTC->getType()},
                                    {VIVElem0, ScalarTC}, nullptr, Name);
   }
+  // Count the number of bits set in each lane and reduce the result to a scalar
+  case VPInstruction::PopCount: {
+    Value *Op = State.get(getOperand(0));
+    auto *VT = Op->getType();
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MacDue wrote:

nit: Spell out type if it's not present on the RHS.
```suggestion
    Type *VT = Op->getType();
```

https://github.com/llvm/llvm-project/pull/100579