[clang] [llvm] [polly] [NFC][DebugInfo] Use iterator moveBefore at many call-sites (PR #123583)

[Orlando Cazalet-Hyams via llvm-commits]

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@@ -242,13 +253,19 @@ class Instruction : public User,
   /// \pre I is a valid iterator into BB.
   void moveBefore(BasicBlock &BB, InstListType::iterator I);
 
-  /// (See other overload for moveBeforePreserving).
   void moveBeforePreserving(BasicBlock &BB, InstListType::iterator I);
+  /// Unlink this instruction from its current basic block and insert it into
+  /// the basic block that MovePos lives in, right before MovePos.
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OCHyams wrote:

Nit: mismatch param name in comment

https://github.com/llvm/llvm-project/pull/123583