As it's causing some bot failures (and per request from kbarton).
This reverts commit r358543/ab70da07286e618016e78247e4a24fcb84077fda.
llvm-svn: 358546
BlockAddress are only valid within their function context, which does not
interact well with CodeExtractor. Detect this case and prevent it.
Differential Revision: https://reviews.llvm.org/D33839
llvm-svn: 306448