Revert "Reapply "[PR16756] Use SSAUpdaterBulk in JumpThreading." one more time."
Revert "Reapply "[PR16756] Use SSAUpdaterBulk in JumpThreading." one more time."

This reverts commit r329865. Causes stage2/stage3 miscompare.

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@329910 91177308-0d34-0410-b5e6-96231b3b80d8

GPUOpen-Drivers/llvm,llvm-mirror/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,apple/swift-llvm,llvm-mirror/llvm,llvm-mirror/llvm,apple/swift-llvm,llvm-mirror/llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,GPUOpen-Drivers/llvm,apple/swift-llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm,GPUOpen-Drivers/llvm,llvm-mirror/llvm