This project is a compiler for SysY language, which is a subset of C. It is implemented in Rust and uses Koopa as intermediate representation.
The compiler can compile SysY source code into Koopa IR with -koopa option and RISC-V assembly with -riscv option.
Even though the compiler can satisfy the standard of course, there are still some bugs and flaws. I am glad to receive any suggestions and corrections.
Building a compiler is a complex task. With the help of automatic tools, I devote most of my effort in parts below.
mem: create Koopa IR in memory, based on the AST. In this process, the compiler collects information about the birth and death of values, and large arrays initialized with zero.ir: translate Koopa IR in memory into string.asm: generate RISC-V assembly from Koopa IR in memory. Register allocation and other optimization is done in this process.
In performance evaluation, 20 benchmark programs compiled by the compiler are tested, which cost 278.91s in total. The compiler is ranked 5th this term.