LLVM Clang 3.9.1, Clang 4.0 & GCC 6.3 With Intel's Clear Linux

A few days back Intel's Clear Linux updated their LLVM Clang compiler from 3.9.1 to the recent 4.0.0 release, following Beignet getting LLVM 4.0 support. Here are some before/after benchmarks as well as fresh GCC benchmarks.