Decafc in Rust

Decaf compiler for CS126

It compiles decaf programs to llvm IR, and then executable of your host architecture.

Build Instruction

Install rust nightly

https://www.rust-lang.org/tools/install

Install LLVM 8.0

http://releases.llvm.org/ Refer to https://gitlab.com/taricorp/llvm-sys.rs for build instructions

Build

$ cd decaf-rust
$ LLVM_SYS_80_PREFIX={your llvm 8.0 installation path} cargo build

Test

$ cd decaf-rust
$ ./test.sh

All tests passed in Windows (LLVM built by msvc) as of 12/15/2019.

Run

To compile example programs:

$ cd decaf-rust
$ cargo run examples/ekern.decaf
$ ./ekern

Files

lnp.rs - Lexer aNd Parser

treebuild.rs - AST builder (with decaf semantic)

Use a two pass visitor pattern

codegen.rs

Use the AST from treebuild.rs to generate code.

Decaf Notes

• `main` function must return void.
• `main` function must accept `String[] argv`.
• There can only be one `static void main String[] argv`.
• Int can be casted to char, and vice versa.
• Object can be casted to int, and vice versa (using its address).