[llvm] [VPlan] Add new VPInstruction ocpode for header mask. (PR #89603)

[via llvm-commits]

================
@@ -1897,22 +1901,21 @@ void VPExpandSCEVRecipe::print(raw_ostream &O, const Twine &Indent,
 #endif
 
 void VPWidenCanonicalIVRecipe::execute(VPTransformState &State) {
-  Value *CanonicalIV = State.get(getOperand(0), 0, /*IsScalar*/ true);
-  Type *STy = CanonicalIV->getType();
+  Value *Start = State.get(getOperand(0), 0, /*IsScalar*/ true);
----------------
ayalz wrote:

[Scalar]CanonicalIV? Admittedly used to build `VStart` below.

https://github.com/llvm/llvm-project/pull/89603