Turn LVI on, previously detected failures should be fixed now.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111923 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Transforms/Scalar/JumpThreading.cpp

@@ -47,7 +47,7 @@ Threshold("jump-threading-threshold",
 static cl::opt<bool>
 EnableLVI("enable-jump-threading-lvi",
           cl::desc("Use LVI for jump threading"),
-          cl::init(false),
+          cl::init(true),
           cl::ReallyHidden);