DebugTypeVisitor This recommits d1346e2. I've added a line to the test case to enable it only on assert builds. Differential Revision: https://reviews.llvm.org/D125839
This reverts commit d1346e2ee2741919a8cc1b1ffe400001e76a6d06. The commit broke a few bots.
DebugTypeVisitor Differential Revision: https://reviews.llvm.org/D125839