[clang] [llvm] [Clang] Fix cleanup attribute by delaying type checks after the type is deduced (PR #164440)

[Aaron Ballman via llvm-commits]

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@@ -737,6 +737,9 @@ class Attr {
   // our existing general parsing we need to have a separate flag that
   // opts an attribute into strict parsing of attribute parameters
   bit StrictEnumParameters = 0;
+  // Set to true for attributes which have Sema checks which requires the type
+  // to be deduced.
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AaronBallman wrote:

Might be worth adding a code example of when this would be set to true?

https://github.com/llvm/llvm-project/pull/164440