[llvm] Add the 'initializes' attribute langref and support (PR #84803)

[Haopeng Liu via llvm-commits]

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@@ -267,6 +281,9 @@ class Attribute {
   /// Returns the value of the range attribute.
   ConstantRange getRange() const;
 
+  /// Returns the value of the initializes attribute.
+  ConstantRangeList getInitializes() const;
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haopliu wrote:

Done!

https://github.com/llvm/llvm-project/pull/84803