[MachineVerifier] Check that even generic vregs comply to regclass constraints.

We used to not check generic vregs, but that is actually a mistake given
nothing in the GlobalISel pipeline is going to fix the constraints on
target specific instructions. Therefore, the target has to have them
right from the start.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290380 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed