[llvm] [VPlan] Delay adding canonical IV increment. (PR #82270)

[via llvm-commits]

================
@@ -1618,30 +1578,26 @@ bool VPlanTransforms::tryAddExplicitVectorLength(
   auto *VPEVL = Builder.createNaryOp(VPInstruction::ExplicitVectorLength, AVL,
                                      DebugLoc());
 
-  auto *CanonicalIVIncrement =
-      cast<VPInstruction>(CanonicalIVPHI->getBackedgeValue());
   VPSingleDefRecipe *OpVPEVL = VPEVL;
+  VPRecipeBase *LatchTerm = Latch->getTerminator();
----------------
ayalz wrote:

Term may be ambiguous. Spell out `LatchTerminator` or rename `LatchEnd` or `LatchBranch` - currently expecting (and replacing) a BranchOnCount?

https://github.com/llvm/llvm-project/pull/82270