[llvm] [LV] Update incoming blocks in VPWidenPHIRecipe in reassociateBlocks (PR #125481)

[Florian Hahn via llvm-commits]

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@@ -659,6 +659,45 @@ TEST_F(VPBasicBlockTest, TraversingIteratorTest) {
   }
 }
 
+TEST_F(VPBasicBlockTest, reassociateBlocks) {
+  {
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fhahn wrote:

Could you add a brief comment what this is testing?

https://github.com/llvm/llvm-project/pull/125481