Track LLVM API change. Not sure if this is the right way to do this.
Track LLVM API change. Not sure if this is the right way to do this.

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