Subtarget support for parameterized register class information

Implement "checkFeatures" and emitting HW mode check code.

Differential Revision: https://reviews.llvm.org/D31959


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@313295 91177308-0d34-0410-b5e6-96231b3b80d8
5 files changed