[llvm] [LV] Pass symbolic VF to CalculateTripCountMinusVF and CanonicalIVIncrementForPart (NFC) (PR #180542)

[Sander de Smalen via llvm-commits]

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@@ -1153,7 +1153,7 @@ class VPIRMetadata {
 /// predication.
 class LLVM_ABI_FOR_TEST VPInstruction : public VPRecipeWithIRFlags,
                                         public VPIRMetadata,
-                                        public VPUnrollPartAccessor<1> {
+                                        public VPUnrollPartAccessor<2> {
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sdesmalen-arm wrote:

Why is this change required? (for the whole of `VPInstruction`)

https://github.com/llvm/llvm-project/pull/180542