This patch adds no-op stubs overrides for the MCRegisterInfo and
MCFrameLowering for the DirectX/DXIL code generation path.
Since DXIL will not generate MCInstrs these stubs do nothing, but they
need to exist so that the MC layer can be used to emit DXContainer
objects.
Differential Revision: https://reviews.llvm.org/D127147
This is the bare minimum needed to get the DirectX target compiling,
but does not actually do anything.
Reviewed By: pete, rnk, arsenm, jaebaek
Differential Revision: https://reviews.llvm.org/D122080