[X86] Add test cases to show isel failing to match BMI blsmsk/blsi/blsr when the flag result is used.

A similar things happen to TBM instructions which we already have tests for.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@349450 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed