commit 21fc3cf3e80c1215806fd8220d22ab628ea63ad7
Author: Sebastien Bourdeauducq <sb@m-labs.hk>
Date:   Mon Mar 23 16:12:52 2020 +0800

    quick and dirty demo of python parsing and llvm output

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diff --git a/Cargo.toml b/Cargo.toml
new file mode 100644
index 00000000..77cb88e4
--- /dev/null
+++ b/Cargo.toml
@@ -0,0 +1,9 @@
+[package]
+name = "nac3"
+version = "0.1.0"
+authors = ["Sebastien Bourdeauducq <sb@m-labs.hk>"]
+edition = "2018"
+
+[dependencies]
+inkwell = { git = "https://github.com/TheDan64/inkwell", branch = "llvm8-0" }
+rustpython-parser = { git = "https://github.com/RustPython/RustPython", branch = "master" }
diff --git a/src/main.rs b/src/main.rs
new file mode 100644
index 00000000..465aa103
--- /dev/null
+++ b/src/main.rs
@@ -0,0 +1,79 @@
+extern crate inkwell;
+extern crate rustpython_parser;
+
+use rustpython_parser::parser;
+
+use inkwell::OptimizationLevel;
+use inkwell::builder::Builder;
+use inkwell::context::Context;
+use inkwell::module::Module;
+use inkwell::targets::*;
+use inkwell::passes::PassManager;
+
+use std::error::Error;
+use std::path::Path;
+
+struct CodeGen<'ctx> {
+    context: &'ctx Context,
+    module: Module<'ctx>,
+    builder: Builder<'ctx>
+}
+
+impl<'ctx> CodeGen<'ctx> {
+    fn compile_sum(&self) {
+        let i64_type = self.context.i64_type();
+        let fn_type = i64_type.fn_type(&[i64_type.into(), i64_type.into(), i64_type.into()], false);
+        let function = self.module.add_function("sum", fn_type, None);
+        let basic_block = self.context.append_basic_block(function, "entry");
+
+        self.builder.position_at_end(basic_block);
+
+        let x = function.get_nth_param(0).unwrap().into_int_value();
+        let y = function.get_nth_param(1).unwrap().into_int_value();
+        let z = function.get_nth_param(2).unwrap().into_int_value();
+
+        let sum = self.builder.build_int_add(x, y, "sum");
+        let sum = self.builder.build_int_add(sum, z, "sum");
+
+        self.builder.build_return(Some(&sum));
+
+        Target::initialize_all(&InitializationConfig::default());
+
+        //let triple = TargetMachine::get_default_triple();
+        let triple = TargetTriple::create("riscv32-none-linux-gnu");
+        let target = Target::from_triple(&triple)
+            .expect("couldn't create target from target triple");
+
+        let target_machine = target
+            .create_target_machine(
+                &triple,
+                "",
+                "",
+                OptimizationLevel::Default,
+                RelocMode::Default,
+                CodeModel::Default,
+            )
+            .expect("couldn't create target machine");
+
+        target_machine
+            .write_to_file(&self.module, FileType::Object, Path::new("test.o"))
+            .expect("couldn't write module to file");
+    }
+}
+
+
+fn main() -> Result<(), Box<dyn Error>> {
+    let context = Context::create();
+    let module = context.create_module("sum");
+    let codegen = CodeGen {
+        context: &context,
+        module,
+        builder: context.create_builder(),
+    };
+    codegen.compile_sum();
+
+    let x = parser::parse_program("def foo(x: int): print('abc')");
+    println!("{:?}", x);
+
+    Ok(())
+}