[SystemZ]  Build Load And Test from scratch in convertToLoadAndTest.
[SystemZ]  Build Load And Test from scratch in convertToLoadAndTest.

This is needed to get CC operand in right place, as expected by the
SchedModel.

Review: Ulrich Weigand
https://reviews.llvm.org/D47820

git-svn-id: 0ff597fd157e6f4fc38580e8d64ab130330d2411@334161 91177308-0d34-0410-b5e6-96231b3b80d8

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