Working LLVM codegen for simple cg_test.ml case
Working LLVM codegen for simple cg_test.ml case

Former-commit-id: 8305bfe93ae0a3e7fe523821578b14c3b678fc12
Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,Trass3r/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,Trass3r/Halide,darkbuck/Halide,darkbuck/Halide