Revert D6240079: [ir/dce] Kill unused phis
commit8969a19717523a96c9b61a7f17f46f62d7d95053
authorBrett Simmers <bsimmers@fb.com>
Tue, 7 Nov 2017 18:57:14 +0000 (7 10:57 -0800)
committerHhvm Bot <hhvm-bot@users.noreply.github.com>
Tue, 7 Nov 2017 19:04:50 +0000 (7 11:04 -0800)
tree932364946656cdfdb5cc83d9e201f81617bc37ea
parentf4f3dece2dd521d25be99a42075764c6c40ecc6f
Revert D6240079: [ir/dce] Kill unused phis

Summary:
It lost a rebase race and broke
test/slow/hack_arr_compat/is_array.php.

Reviewed By: jano

fbshipit-source-id: b31ff08442574041632b9cf15d50ef1817899b6a
hphp/runtime/vm/jit/dce.cpp
hphp/runtime/vm/jit/ir-instruction.cpp
hphp/runtime/vm/jit/ir-instruction.h
hphp/runtime/vm/jit/simplify.cpp