EasyPass that show only function names...

README.md

EasyPass

This pass print function names

source tree

.
├── CMakeLists.txt
└── easypass
    ├── CMakeLists.txt
    └── easypass.cpp

Requirements

install llvm into your system

How to build

mkdir build & cd build
cmake ..
make

you will get easypass/libeasypass.so

Usage

opt -load easypass/libeasypass.so -easypass hoge.ll > /dev/null

Function name : main
...

CMakeLists1.txt

# projectroot/CmakeLists.txt

cmake_minimum_required(VERSION 2.8.8)
find_package(LLVM REQUIRED CONFIG)

add_definitions(${LLVM_DEFINITIONS})
include_directories(${LLVM_INCLUDE_DIRS})
link_directories(${LLVM_LIBRARY_DIRS})

add_subdirectory(easypass)

CMakeLists2.txt

# projectroot/easypass/CMakeLists.txt

add_library(easypass MODULE EasyPass.cpp)

target_compile_features(easypass PRIVATE cxx_range_for cxx_auto_type)

set_target_properties(easypass PROPERTIES
  COMPILE_FLAGS "-fno-rtti"
)

EasyPass.cpp

/**
 * projectroot/easypass/EasyPass.cpp
 **/

#include <cstdio>
#include "llvm/Pass.h"
#include "llvm/IR/Function.h"
#include "llvm/Support/raw_ostream.h"

using namespace llvm;

namespace {
class EasyPass : public FunctionPass {
public:
    static char ID;
    EasyPass() : FunctionPass(ID) {}
    ~EasyPass() {}

    virtual bool runOnFunction(Function &F);
};
}

bool EasyPass::runOnFunction(Function &F) {
    errs() << "Function name: " << F.getName().str() << "\n";
    return false;
}

char EasyPass::ID = 0;
static RegisterPass<EasyPass> X(
        "easypass",
        "easypass only print function name",
        false,
        false
    );