Properly constrain register classes in 2-addr.

X86 has 2-addr instructions with different constraints on the tied def
and use operands. One is GR32, one is GR32_NOSP.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@157149 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed