ICC is a highly optimized compiler for Intel processor. In my test suits, it 's much faster in executing a program than gcc and open64. While I am tuning a kernel , need to give the limit of the performance of the kernel (performance onlycan be limited by procssor resource and architecture shortcomings, cannot be limited by program itself).
As a result of the above resons, I need to know what optimize strategy intel compiler cannot do .
So that I can optimize a special kernel in these unused method.