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

[via llvm-commits]

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@@ -272,18 +264,20 @@ Type *VPTypeAnalysis::inferScalarType(const VPValue *V) {
     return CanonicalIVTy;
   }
 
+  if (auto *CanIV = dyn_cast<VPRegionValue>(V))
+    return CanonicalIVTy;
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ayalz wrote:

All region values are expected to have the same type, is independent of their region...

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