[llvm] [VPlan]: During VPRegionBlock::clone, sync the NUW of CanIVInfo (PR #212266)

[David Sherwood via llvm-commits]

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@@ -778,6 +778,9 @@ VPRegionBlock *VPRegionBlock::clone() {
   if (getHeaderMask())
     NewRegion->createHeaderMask();
 
+  if (CanIV && !hasCanonicalIVNUW())
+    NewRegion->CanIVInfo->clearNUW();
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david-arm wrote:

Hi @hassnaaHamdi, any thoughts on whether it's possible to write a test for this?

https://github.com/llvm/llvm-project/pull/212266