[InstCombine][AVX-512] Teach InstCombine that llvm.x86.avx512.vcomi.sd and llvm.x86.avx512.vcomi.ss don't use the upper elements of their input.

This was already done for the SSE/SSE2 version of the intrinsics.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@290776 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed