commit 39e6ab4be93d9c5e729a578ddd9d415cd2d49872
author David Blaikie <dblaikie@gmail.com> Mon Feb 18 22:06:02 2013 +0000
committer David Blaikie <dblaikie@gmail.com> Mon Feb 18 22:06:02 2013 +0000
tree fc9c9aad9c0b7b392ff2b08bb1d5df59c8d6c048
parent 9ba7627d25a7555b1afff04f685d2f161974e682

Replace TypeLoc llvm::cast support to be well-defined.

The TypeLoc hierarchy used the llvm::cast machinery to perform undefined
behavior by casting pointers/references to TypeLoc objects to derived types
and then using the derived copy constructors (or even returning pointers to
derived types that actually point to the original TypeLoc object).

Some context is in this thread:
http://lists.cs.uiuc.edu/pipermail/llvmdev/2012-December/056804.html
Though it's spread over a few months which can be hard to read in the mail
archive.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@175462 91177308-0d34-0410-b5e6-96231b3b80d8