CS510_Project2

To build llvm, we have to follow this steps:

Step1:

First, we need to create the build directory in the directory project2, where there are two other directories name llvm and testcase

mkdir build && cd build

Step2:

Then from the build directory, we have to run cmake, there is a script in the project2 directory , we can simply run this script, but before that, we need to check whether we have execution permission to that script

chmod +x cmake_script.sh
cd build
../cmake_script.sh

or we can just give the command of cmake instead of running the script:

cmake -GNinja \
-DCMAKE_BUILD_TYPE=Debug \
-DCMAKE_C_COMPILER=clang \
-DCMAKE_CXX_COMPILER=clang++ \
-DLLVM_ENABLE_ASSERTIONS=ON \
-DLLVM_BUILD_TESTS=OFF \
-DLLVM_BUILD_EXAMPLES=OFF \
-DLLVM_INCLUDE_TESTS=OFF \
-DLLVM_INCLUDE_EXAMPLES=OFF \
-DBUILD_SHARED_LIBS=on \
-DLLVM_TARGETS_TO_BUILD="X86" \
-DCMAKE_C_FLAGS="-fstandalone-debug -fuse-ld=gold" \
-DCMAKE_CXX_FLAGS="-fstandalone-debug -fuse-ld=gold" \
 ../llvm

Step 3:

For building, we are needed to have ninja, if ninja is not installed, we have to remove the -GNinja option from the cmake script

ninja

Step 4:

Next, we have to compile test case with my pass, the general command for this is

/path/to/clang   /path/to/testcase/tc1.c    -fsanitize=cgraph

For example, to check testcase tc1.c within the testcase directory, we have to give the following command:

../build/bin/clang tc1.c -fsanitize=cgraph

Step 5:

The previous command will output in the console, it will also generate a dot file of the program, to check the dot file, we can convert it from dot to png using the following command. For this command we need to install graphviz.

dot -Tpng cgraph.dot > cgraph.png