Dependencies

You will likely need the following packages.

git cmake python-dev libncurses5-dev swig libedit-dev libxml2-dev build-essential gcc-7-plugin-dev clang-6 libclang-6-dev lld-6

Clone Git Repository

git clone --recurse-submodules https://github.com/yonghaekim/riscv-llvm-example.git

Build riscv-gnu-toolchain

cd riscv-llvm-example
cd riscv-gnu-toolchain
./configure --prefix=$PWD/../_install --enable-multilib --target=riscv64-linux-gnu
make linux

Build LLVM and Add LLVM path to $PATH

./build.sh
export EX_HOME=$(pwd)
export PATH=$(pwd)/_install/bin:$PATH

Compile a test program

1. First, move to "./ex_test"

cd ./ex_test

2. Emit the IR file of a test program

clang -O3 -march=rv64imac -mabi=lp64 -static --target=riscv64-unknown-linux-gnu \
-Wall -Wextra -fPIC -fvisibility=hidden --sysroot=$EX_HOME/_install/sysroot \
-I$EX_HOME/_install/sysroot/usr/include -B$EX_HOME/_install/riscv64-unknown-linux-gnu \
-L$EX_HOME/_install/riscv64-unknown-linux-gnu \
-S -emit-llvm test.c -o test.ll

3. Apply DPT passes to the IR file

opt -dpt-type=dpt-h -dpt-tag -enable-new-pm=0 -S test.ll -o test_inst.ll

4. Compile the instrumented IR file

clang -O3 -march=rv64imac -mabi=lp64 -static --target=riscv64-unknown-linux-gnu \
-Wall -Wextra -fPIC -fvisibility=hidden --sysroot=$EX_HOME/_install/sysroot \
-I$EX_HOME/_install/sysroot/usr/include -B$EX_HOME/_install/riscv64-unknown-linux-gnu \
-L$EX_HOME/_install/riscv64-unknown-linux-gnu \
test_inst.ll dpt_lib.o -o test_inst

Original LLVM README

================================

This directory and its subdirectories contain source code for LLVM, a toolkit for the construction of highly optimized compilers, optimizers, and runtime environments.

LLVM is open source software. You may freely distribute it under the terms of the license agreement found in LICENSE.txt.

Please see the documentation provided in docs/ for further assistance with LLVM, and in particular docs/GettingStarted.rst for getting started with LLVM and docs/README.txt for an overview of LLVM's documentation setup.

If you are writing a package for LLVM, see docs/Packaging.rst for our suggestions.