[clang] [llvm] [clang/LLVM] Add flatten_deep attribute for depth-limited inlining (1/2) (PR #165777)

[Yuxuan Chen via llvm-commits]

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@@ -4032,6 +4032,29 @@ callee is unavailable or if the callee has the ``noinline`` attribute.
   }];
 }
 
+def FlattenDeepDocs : Documentation {
+  let Category = DocCatFunction;
+  let Content = [{
+The ``flatten_deep`` attribute causes calls within the attributed function and
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yuxuanchen1997 wrote:

Grammatically, I am not a big fan of this name. It probably makes better sense if it's called "flatten_at_depth(3)". 

https://github.com/llvm/llvm-project/pull/165777