[llvm] [VPlan] Make canonical IV part of the region (PR #156262)

[Florian Hahn via llvm-commits]

================
@@ -168,7 +172,9 @@ class LLVM_ABI_FOR_TEST VPValue {
   bool hasDefiningRecipe() const { return getDefiningRecipe(); }
 
   /// Returns true if this VPValue is a live-in, i.e. defined outside the VPlan.
-  bool isLiveIn() const { return !hasDefiningRecipe(); }
+  bool isLiveIn() const {
+    return !hasDefiningRecipe() && SubclassID != VPRegionValueSC;
----------------
fhahn wrote:

As in also checking in hasDefiningRecipe? Added ,thanks

https://github.com/llvm/llvm-project/pull/156262