A set of Pass and functions to help analysis program's performance model.

if gcc doesn't support c++11 ,can use clang

$ export CC=clang
$ export CXX=clang++
$ mkdir build;cd build
$ cmake .. -DLLVM_RECOMMAND_VERSION="3.4"
$ make

use LLVM_RECOMMAND_VERSION to change llvm version directly

drawline.py : used to draw lines from value profiling dirdiff.sh : compare two dir's llvmprof.out file and report whether they are same

1. insert edge profiling into bitcode.
2. compile program and run.
3. output the text format profiling log using llvm-prof
4. merge multi process's log into one. using edge-merge
5. curfit ??? curve-fit