Update MemorySSA in LoopUnswitch.

Summary:
Update MemorySSA in old LoopUnswitch pass.
Actual dependency and update is disabled by default.

Subscribers: sanjoy, jlebar, Prazek, llvm-commits

Differential Revision: https://reviews.llvm.org/D45301

llvm-svn: 341984
diff --git a/llvm/test/Transforms/LoopUnswitch/copy-metadata.ll b/llvm/test/Transforms/LoopUnswitch/copy-metadata.ll
index 3302bce..6b5b93d 100644
--- a/llvm/test/Transforms/LoopUnswitch/copy-metadata.ll
+++ b/llvm/test/Transforms/LoopUnswitch/copy-metadata.ll
@@ -1,4 +1,5 @@
 ; RUN: opt < %s -loop-unswitch -S < %s 2>&1 | FileCheck %s
+; RUN: opt < %s -loop-unswitch -enable-mssa-loop-dependency=true -verify-memoryssa -S < %s 2>&1 | FileCheck %s
 
 ; This test checks if unswitched condition preserve make.implicit metadata.