[Clang] [NFC] Update release notes

Author: Sirraide

clang/docs/ReleaseNotes.rst

@@ -569,6 +569,30 @@ Improvements to Clang's diagnostics
   and template friend declarations with a constraint that depends on a template parameter from an
   enclosing template must be a definition.
 
+- Clang now emits more descriptive diagnostics for 'unusual' expressions (e.g. incomplete index
+  expressions on matrix types or builtin functions without an argument list) as placement-args
+  to new-expressions.
+
+  Before:
+
+  .. code-block:: text
+
+    error: no matching function for call to 'operator new'
+       13 |     new (__builtin_memset) S {};
+          |     ^   ~~~~~~~~~~~~~~~~~~
+
+    note: candidate function not viable: no known conversion from '<builtin fn type>' to 'int' for 2nd argument
+        5 |     void* operator new(__SIZE_TYPE__, int);
+          |           ^
+
+  After:
+
+  .. code-block:: text
+
+    error: builtin functions must be directly called
+       13 |     new (__builtin_memset) S {};
+          |          ^
+
 
 Improvements to Clang's time-trace
 ----------------------------------
@@ -765,6 +789,12 @@ Bug Fixes in This Version
   Fixes (`#77583 <https://github.com/llvm/llvm-project/issues/77583>`_)
 - Fix an issue where CTAD fails for function-type/array-type arguments.
   Fixes (`#51710 <https://github.com/llvm/llvm-project/issues/51710>`_)
+- The MS ``__noop`` builtin without an argument list is now accepted
+  in the placement-args of new-expressions, matching MSVC's behaviour.
+- Fix an issue that caused MS ``__decspec(property)`` accesses as well as
+  Objective-C++ property accesses to not be converted to a function call
+  to the getter in the placement-args of new-expressions.
+  Fixes (`#65053 <https://github.com/llvm/llvm-project/issues/65053>`_)
 
 Bug Fixes to Compiler Builtins
 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^