Unary operators and TACKY IR

0.2.0.0 -- 2024-11-22

Added

• Support for unary operators (negation and bitwise complement)
• New TACKY intermediate representation between AST and Assembly
• Stack frame management in generated assembly
• Function prologue and epilogue handling
• Pseudoregister allocation and replacement
• Invalid instruction detection and fixing
• New compiler passes in pipeline:
  • TACKY generation
  • Pseudoregister replacement
  • Stack allocation
  • Instruction fixing

Changed

• Compiler pipeline now includes TACKY transformation stage
• Assembly generation now works from TACKY rather than directly from AST
• Parser improved to handle nested expressions correctly