+<li>
+ The signature of the <tt>GCMetadataPrinter::finishAssembly</tt> virtual
+ function changed: the <tt>raw_ostream</tt> and <tt>MCAsmInfo</tt> arguments
+ were dropped. GC plugins which compute stack maps must be updated to avoid
+ having the old definition overload the new signature.
+</li>
+<li>
+ The signature of <tt>MemoryBuffer::getMemBuffer</tt> changed. Unfortunately
+ calls intended for the old version still compile, but will not work correctly,
+ leading to a confusing error about an invalid header in the bitcode.
+</li>