[Hexagon] Fix a latent problem with interpreting live-in lane masks

A non-zero lane mask on a register with no subregister means that the
whole register is live-in. It is equivalent to a full mask.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@300335 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed