[x86] generate IR for AVX2 integer min/max builtins
Sibling patch to r272932:
http://reviews.llvm.org/rL272932


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@272933 91177308-0d34-0410-b5e6-96231b3b80d8
2 files changed