[AVX-512] Add more masked vector extract test cases with and without a bitcast between the select.

The ones with the bitcast need additional work to fold the mask operation properly. This will be fixed in a future commit.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@291213 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed