[llvm] Add the "initializes" attribute inference (PR #97373)

[Thorsten Schütt via llvm-commits]

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@@ -580,6 +582,205 @@ struct ArgumentUsesTracker : public CaptureTracker {
   const SCCNodeSet &SCCNodes;
 };
 
+struct ArgumentUse {
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tschuett wrote:

missing documentation.

https://github.com/llvm/llvm-project/pull/97373