Simple S-Pacal Compiler 概要

Build

• 建立build文件夹，cd进入，通过

cmake ..
make 

这时会根据makefile文件自动构建、链接程序。

Features

• 简单的数据类型: boolean, char, integer, real,string
• 控制流: if-else, case-of, while-do, repeat-until, and for loops
• 定义: const, type, var, and routine sections
• Routine (function and procedure) definition and invocation
  • 包括一些系统函数: read(ln), write(ln), abs, sqrt, chr, ord, pred, succ
• Operators: + - * / div mod and or xor not and comparison operators
• 类型检查, 从 integer 到 real 隐式类型转换

Usage

USAGE: spc <option> <source.pas>
OPTION:
  -emit-llvm    Emit LLVM IR (.ll)
  -S            Emit assembly code (.s)
  -c            Emit object code (.o)
  -O            (Optional) 可选的做一些优化
  -o des        name output file as des
  -ast          生成ast树

• For LLVM IR files, run lli output.ll to directly execute them.
• For assembly and object files, run cc output.{s,o} to generate executables.

Dependencies

• CMake 3.7+
• Flex 2.5+
• Bison 3.0+
• LLVM 9 ( LLVM 10 Not recommended becuause of some bug in cmake scripts of it)

TODO

• 支持array record复杂的数据类型
• 完成支持函数嵌套(Optional)
• generate detailed error messages for Flex/Bison (Optional)
• do error recovery in Bison and codegen (Optional)