Krzysztof Parzyszek 975a2623d5 Revert "Improve handling of COPY instructions with identical value numbers"
This reverts r334594, it breaks buildbots and fails with expensive checks.

llvm-svn: 334598
2018-06-13 13:49:06 +00:00
..
2017-10-16 20:48:19 +00:00