RCC (C-like Compiler, R for either remarkable or retarded)

Authors: Haoyang Shi, Tinghao Xie

This repository contains our course project for Compiler Principle at ZJU.

Differences with C

• type system: char, int, double and n-dimensional array type; Pointer type is not supported in this version.
• no controled jumps, gotos and labels , i.e. break, continue and switch statements are not supported.
• scanf and printf are automaticly declared and linked with libc in runtime
• calling convention of scanf modified. e.g. you shall use scanf("%d",i) to read the value into variable i and drop the & symbol.
• for loop switched to pascal-like for(i: 0 to n){} and for(i: n downto 0){} snippet where i is only seen within the scope of this loop
• unary operators not supported

Try out the test samples to get a better understanding of the gramma.

More Features

• Advanced self-defined types (nested struct and arrays)
• MACRO support (#define/#define f(X),#ifdef/ifndef and nested)
• Error detection and recovery (primary)

Prerequsite

• flex 2.5+
• bison 3.0+
• clang 7.0+
• llvm 7.0+

which is easily accessible via apt and other package managers.

It has been successfully tested with

• flex 2.6.4 + bison 3.0.4 + llvm-12 on Ubuntu 18.04 (x86_64)
• flex 2.5.35 + bison 3.7.6 + llvm-12 on MacOS (x86_64)

Install

Clean the directory with:

make clean

Install with:

make

If you want to install with a specific version of bison, install with:

make BISON=[YOUR-BISON-PATH]

If you are installing RCC with LLVM12 on MacOS, install with:

make DEFINE='-D MACOS'

Usage

./rcc src_file
./a.out

The generated ELF object file and executable are named output.o and a.out respectively by default.