BCC (Bakpia C Compiler)

My implementation of a C compiler for x64 processors.

Reference: Writing a C Compiler — Build a Real Programming Language from Scratch by Nora Sandler

Checkpoint (Jan 7, 2026)

• Stage 1 - Minimal C Program (function decl, return constant)
• Stage 2 - Unary Operators
  • Negation (-)
  • Bitwise Complement (~)
  • Logical Negation (!)
• Stage 3 - Binary Operators
  • Addition (+)
  • Subtraction (-)
  • Multiplication (*)
  • Division (/)
• Stage 4 - Relational & Logical Operators
  • Relational (<, >, <=, >=)
  • Equality (==, !=)
  • Logical AND (&&)
  • Logical OR (||)
• Stage 5 - Local Variables & Assignment
  • Variable Declaration (int x = ...)
  • Variable Usage (return x)
  • Assignment (x = y)
• Stage 6 - Conditionals
  • If Statements (if (cond) { ... } else { ... })
  • Conditional Operator (cond ? true : false)
  • Compound Statements / Blocks ({ ... })
• Stage 7 - Loops
  • While (while)
  • Do-While (do ... while)
  • For (for)
  • Break (break)
  • Continue (continue)
• Stage 8 - Functions
  • Function Function Definition & Calling (Multi-argument)
  • System V ABI (Arguments in registers)
• Stage 9 - Global Variables
  • Global Variable Declaration
  • Global vs Local Scope (Shadowing)
• Stage 10 - Static Variables
  • Static Global Variables (Internal Linkage)
  • Static Local Variables (Persistence)
• Stage 11 - Long Integers
  • 64-bit Integer type (long)
  • Type Promotion
• Stage 12 - Unsigned Integers
  • Unsigned types (unsigned int, unsigned long)
  • Unsigned Arithmetic & Comparison
• Stage 13 - Bitwise Operators
  • AND (&)
  • OR (|)
  • XOR (^)
  • Shift Left (<<)
  • Shift Right (>>)
• Stage 14 - Compound Assignment
  • Arithmetic Compound (+=, -=, *=, /=, %=)
  • Bitwise Compound (&=, |=, ^=, <<=, >>=)
• Stage 15 - Increment & Decrement
  • Pre-increment (++x)
  • Post-increment (x++)
  • Pre-decrement (--x)
  • Post-decrement (x--)
• Stage 16 - Pointers
  • Pointer Declaration (int *p)
  • Address-Of Operator (&x)
  • Dereference Operator (*p)
  • Pointer Arithmetic (Basic)

Test System

The test runner test_runner.py supports Automatic Test Discovery.

• Add a .c file to tests/.
• Include // RETURN: <expected_code> in the file.
• make test-all will automatically compile, run, and verify the exit code.