travis apparently has a custom old llvm install in the path
travis apparently has a custom old llvm install in the path

jiawen/Halide,kgnk/Halide,ronen/Halide,jiawen/Halide,jiawen/Halide,kgnk/Halide,jiawen/Halide,psuriana/Halide,ronen/Halide,psuriana/Halide,ronen/Halide,kgnk/Halide,kgnk/Halide,psuriana/Halide,kgnk/Halide,psuriana/Halide,psuriana/Halide,kgnk/Halide,jiawen/Halide,jiawen/Halide,ronen/Halide,ronen/Halide,ronen/Halide,jiawen/Halide,ronen/Halide,psuriana/Halide,kgnk/Halide,ronen/Halide,kgnk/Halide,psuriana/Halide