[llvm-mca] Add another test for partial register stalls.

This test checks that a physical register is correctly allocated for the partial
write to register BX.
The ADD instruction has to wait for the write to RBX (and BX) before being
executed.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@334730 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed