Toy C-Compiler for course CS335, 2021 - II

Source language :- C

Implementation language :- Python

Target language :- x86 assembly language

• Dev Chauhan
• Hitesh Gupta
• Naman Biyani
• Nirmal Suthar

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

$ make clean # For removing the build
$ make

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

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

• 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

• 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

• Amey Karkare (Course Instructor CS335)

This project is licensed under the MIT License

• PLY for Lexing and Parsing
• Grammar-lex
• Grammar-yacc
• Stanford 3AC Examples