Don't cache the instruction info and register info objects.

These objects are internal to the TargetMachine object and may change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183485 91177308-0d34-0410-b5e6-96231b3b80d8
Don't cache the instruction and register info from the TargetMachine, because
the internals of TargetMachine could change.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183488 91177308-0d34-0410-b5e6-96231b3b80d8