[clang] modified AST for SEI redemption project (PR #111705)

[Aaron Ballman via cfe-commits]

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@@ -184,6 +206,18 @@ class JSONNodeDumper
 
   StringRef getCommentCommandName(unsigned CommandID) const;
 
+  /// SEI: simple cacher for addresses of nodes to reduce
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AaronBallman wrote:

This comment should be rewritten and the function renamed. `cacheAddress()` doesn't really describe much and it's not clear why someone would call this function from the comments.

https://github.com/llvm/llvm-project/pull/111705