[x86, SSE, AVX] add tests for icmp+zext (PR28484)

Note the inconsistent vpbroadcast generation for AVX2; another bug.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@275020 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed