Revert "Reapply "[PR16756] Use SSAUpdaterBulk in JumpThreading." again."

This reverts r330175. There are still stage3/stage4 miscompares.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@330180 91177308-0d34-0410-b5e6-96231b3b80d8

test/Transforms/JumpThreading/removed-use.ll

@@ -1,28 +0,0 @@
-; RUN: opt -S < %s -jump-threading | FileCheck %s
-; CHECK-LABEL: @foo
-; CHECK: bb6:
-; CHECK-NEXT: ret void
-; CHECK: bb3:
-; CHECK: br label %bb3
-define void @foo() {
-entry:
-  br i1 true, label %bb6, label %bb3
-
-bb3:
-  %x0 = phi i32 [ undef, %entry ], [ %x1, %bb5 ]
-  %y  = and i64 undef, 1
-  %p  = icmp ne i64 %y, 0
-  br i1 %p, label %bb4, label %bb5
-
-bb4:
-  br label %bb5
-
-bb5:
-  %x1 = phi i32 [ %x0, %bb3 ], [ %x0, %bb4 ]
-  %z  = phi i32 [ 0, %bb3 ], [ 1, %bb4 ]
-  %q  = icmp eq i32 %z, 0
-  br i1 %q, label %bb3, label %bb6
-
-bb6:
-  ret void
-}