diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 3264846506c68..6f336088750fb 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -191,6 +191,16 @@ Attribute Changes in Clang
 Windows Support
 ---------------
 
+- Don't warn about `ms_struct may not produce Microsoft-compatible layouts
+  for classes with base classes or virtual functions` if the option is
+  enabled globally, as opposed to enabled on a specific class/struct or
+  on a specific section in the source files. This avoids needing to
+  couple `-mms-bitfields` with `-Wno-incompatible-ms-struct` if building
+  C++ code.
+
+- Enable `-mms-bitfields` by default for MinGW targets, matching a similar
+  change in GCC 4.7.
+
 C Language Changes in Clang
 ---------------------------
 
diff --git a/lld/docs/ReleaseNotes.rst b/lld/docs/ReleaseNotes.rst
index fe3de8306cd85..f0482c2428c49 100644
--- a/lld/docs/ReleaseNotes.rst
+++ b/lld/docs/ReleaseNotes.rst
@@ -40,12 +40,17 @@ Breaking changes
 COFF Improvements
 -----------------
 
-* ...
+* Fixed exporting symbols whose names contain a period (``.``), which was
+  a regression in lld 7.
 
 MinGW Improvements
 ------------------
 
-* ...
+* Implemented new options for disabling auto import and runtime pseudo
+  relocations (``--disable-auto-import`` and
+  ``--disable-runtime-pseudo-reloc``), the ``--no-seh`` flag and options
+  for selecting file and section alignment (``--file-alignment`` and
+  ``--section-alignment``).
 
 MachO Improvements
 ------------------
diff --git a/llvm/docs/ReleaseNotes.rst b/llvm/docs/ReleaseNotes.rst
index ed1718a950546..c9ac61d296769 100644
--- a/llvm/docs/ReleaseNotes.rst
+++ b/llvm/docs/ReleaseNotes.rst
@@ -81,6 +81,15 @@ Changes to the LLVM IR
 Changes to building LLVM
 ------------------------
 
+Changes to the AArch64 Backend
+------------------------------
+
+* Back up and restore x18 in functions with windows calling convention on
+  non-windows OSes.
+
+* Clearly error out on unsupported relocations when targeting COFF, instead
+  of silently accepting some (without being able to do what was requested).
+
 Changes to the ARM Backend
 --------------------------
 
@@ -157,6 +166,12 @@ Changes to the WebAssembly Target
 * `__attribute__((visibility("protected")))` now evokes a warning, as
   WebAssembly does not support "protected" visibility.
 
+Changes to the Windows Target
+-----------------------------
+
+* Produce COFF weak external symbols for IR level weak symbols without a comdat
+  (e.g. for `__attribute__((weak))` in C)
+
 Changes to the OCaml bindings
 -----------------------------
 
@@ -195,6 +210,12 @@ Changes to the LLVM tools
   symbols, i.e. mapping symbols on ARM and AArch64, by default. This matches
   the GNU nm behavior.
 
+* llvm-rc now tolerates -1 as menu item ID, supports the language id option
+  and allows string table values to be split into multiple string literals
+
+* llvm-lib supports adding import library objects in addition to regular
+  object files
+
 Changes to LLDB
 ===============