"The attached diff fixes the //FIXME in message send to super. This should...

"The attached diff fixes the //FIXME in message send to super.  This should now be faster, and works in the presence of class posing.  This is now the same approach as used in GCC (the earlier code was a quick hack to get something working)."

Patch by David Chisnall!

llvm-svn: 70877