Store bool result in register after SetCC if the bool value
is used by anything other than a branch.
Forward-substitute operand of a VM instruction for which no
machine instruction is generated (e.g., Cast).
Other changes due to changes to classes TargetMachine and MachineInstr.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309 91177308-0d34-0410-b5e6-96231b3b80d8