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gcc_lite

Toy C-Compiler for course CS335, 2021 - II

Source language :- C

Implementation language :- Python

Target language :- x86 assembly language

Members

Structure

For installing Dependencies

$ make dep
# OR
$ pip install --ignore-installed -r ./requirements.txt

For building executable

$ make clean # For removing the build
$ make

For running the compiler:

./bin/gcc_lite [-o outfile] tests/helloworld.c

For more informations about usage

usage: gcc_lite [-h] [-d] [-o OUT] [-l] [-D] [-p] [-I] [--sym] [-S] [-R] input

Compiler for C programs

positional arguments:
  input              C program file to compile

optional arguments:
  -h, --help         show this help message and exit
  -d, --debug        Generate assembly with extra information (for debugging purposes)
  -o OUT, --out OUT  File name to store generated executable
  -l, --lex          Store output of lexer
  -D, --dot          Generate AST graph as DOT format
  -p, --png          Generate AST graph as png format
  -I, --ir           Dump the generated Intermediate representation
  --sym              Dump the symbol table
  -S, --asm          Store the generated assembly file
  -R, --exec         Execute the generated program

Features

Basic Features

  • Native data types: Int, Char, Float
  • Variables and Expressions
  • Conditional: if, if-else, switch-case
  • Loops: for, while, do-while
  • Break, Continue
  • Switch Case
  • Arrays: Single and multidimensional
  • Input,output
  • Functions, recursion
  • Pointers: Single and multilevel
  • Simple library functions
  • Arithmetic operators
  • Logical and bitwise operators
  • Struct user defined data type
  • Typedef

Advanced Features

  • Dynamic memory allocation (malloc, free)
  • Register allocation optimization using conditional spilling
  • File Handling
  • Fork and exec system calls
  • Storage Optimization for Char and string
  • Nested Struct and Array Initializers
  • Multidimensional arrays as function parameters
  • Short circuit expression evaluation

Acknowledgments

  • Amey Karkare (Course Instructor CS335)

License

This project is licensed under the MIT License

References