[X86][SSE] Added chained FDIV test cases for D26855

Tests to demonstrate throughput-latency decision between div and rcp on faster hardware such as Haswell

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@294750 91177308-0d34-0410-b5e6-96231b3b80d8
1 file changed