punkyc/dragon-front-cpp

A simple compiler front end

This is the complementation of c++ based on the source code of the complete compiler front end in the appendix of "Compilers: Principles, Techniques, and Tools, 2/e".

Building the project after getting the source code

cmake -S ../dragon-front-cpp -B build
cd build 
make

Requirements

Before you build the project, ensure you have installed the LLVM project. And import $llvm_install_path to ~/.bashrc .

export PATH=$llvm_install_path:$PATH

Translating testcases into LLVM IR

./build/CompilerFrontCpp <tests/block1.t >tests/block1.ll

Then, we can use llc to convert .ll files to the assembly files(eg: block1.s). And use riscv-gnu-toolchain to link and obtain the elf files which can run in qemu.

llc --march=riscv64 block1.ll
riscv32-unknown-elf-gcc block1.s -o block1
./qemu-project/build/qemu-riscv32 block1