[llvm] [LV] Initialize IR block pointers in ILV. (NFC) (PR #139807)

[Florian Hahn via llvm-commits]

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@@ -603,13 +603,13 @@ class InnerLoopVectorizer {
   // --- Vectorization state ---
 
   /// The vector-loop preheader.
-  BasicBlock *LoopVectorPreHeader;
+  BasicBlock *LoopVectorPreHeader = nullptr;
 
   /// The scalar-loop preheader.
-  BasicBlock *LoopScalarPreHeader;
+  BasicBlock *LoopScalarPreHeader = nullptr;
 
   /// Middle Block between the vector and the scalar.
-  BasicBlock *LoopMiddleBlock;
+  BasicBlock *LoopMiddleBlock = nullptr;
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fhahn wrote:

For most it is probably not worth the trouble, as it isn't expose outside LoopVectorize.cpp, and things are going to get removed gradually.

https://github.com/llvm/llvm-project/pull/139807