C-- Compiler for MIPS32

A compiler for C-- to MIPS32

A description of the C-- Language can be found here

PLANNED, BUT UNSUPPORTED FEATURES

• MIPS generation for compound boolean expressions AND & OR (ex: x > y || y < z)

Features

• Lexical Analysis
• Syntax Analysis
• Semantic Checking
• Abstract Syntax Tree Generation
• Intermediate Code Generation
• Arithmetic Expression Evaluation
• MIPS32 Assembly Code Generation

Installation

Clone the repository and make the compiler:

make

The resulting excecutable will be called compile

Optional Flags

There are 4 optional flags for compilation

--chk_decl: parser will perfom semantic checking, and throw a syntax error if one is encounters (e.g. multiply declared variables)

--print_ast: prints out the AST structure of the inputted source code to stdout

--gen_code: prints MIPS32 assembly code generated from the input source code

--gen_3ac: prints the intermediary 3 address code to stdout

The compiler can be run with all, none, or a combination of flags

note about linked function println(int):

This compiler has support for printing integers using a function called println(int). The function definition does not need to be in the source code, as it is linked to the mips output during the code generation phase. If source code contains calls to println(int) when the --chk_decl or --print_ast flags are on, the compiler will throw an error. Simply add function stub int println(int x){} to the top of the source code for these flags to work properly.

Run

compile receives code from stdin. C-- code can be provided via the command line until and EOF token is entered.

./compile [--chk_decl] [--print_ast] [--gen_code][--gen_3ac]

to pipe input from a file, and produce a .s file:

cat [filename] | ./compile --gen_code > output.s

Clean

to clean all libraries and excecutables:

make clean