message: Document running rust code from the shell
diff: @@ -13,7 +13,7 @@ $ ./test.sh --release
  ## Usage
  -`$cg_clif_dir` is the directory you cloned this repo into in the following instruction.
  +`$cg_clif_dir` is the directory you cloned this repo into in the following instructions.
  ### Cargo
  @@ -31,6 +31,24 @@ If you compiled cg_clif in debug mode (aka you didn't pass `--release` to `./tes
  $ rustc +$(cat $cg_clif_dir/rust-toolchain) -Cpanic=abort -Zcodegen-backend=$cg_clif_dir/target/release/librustc_codegen_cranelift.so --sysroot $cg_clif_dir/build_sysroot/sysroot my_crate.rs
  ```
  +### Shell
  +
  +These are a few functions that allow you to easily run rust code from the shell using cg_clif as jit.
  +
  +```bash
  +function jit_naked() {
  + echo "$@" | CG_CLIF_JIT=1 rustc -Zcodegen-backend=$cg_clif_dir/target/release/librustc_codegen_cranelift.so --sysroot $cg_clif_dir/build_sysroot/sysroot - -Cprefer-dynamic
  +}
  +
  +function jit() {
  + jit_naked "fn main() { $@ }"
  +}
  +
  +function jit_calc() {
  + jit 'println!("0x{:x}", ' $@ ');';
  +}
  +```
  +
  ## Env vars
  <dl>
  