In some circumstances, we would like to ignore the files (or directories) under the Git repository base directory. How could we do this? For example, assume that we have a Git repository with following files:
out/bin/conv
preprocessed/out/gen-case1.h
preprocessed/out/gen-case2.h
preprocessed/input.txt
conv …C++11 introduced three new smart pointer class templates:
std::unique_ptr, std::shared_ptr, and std::weak_ptr.
These smart pointer class templates are designed to replace the old
std::auto_ptr smart pointer, which is known to have some defect and
deprecated now. In this post, I would like to give a …
Today I have encountered a problem: Given that there are multiple equivalent
keys in an instance of std::multimap, how could we list all of the
corresponding values? For example:
#include <map>
#include <iostream>
int main() {
std::multimap<int, int> xs;
xs.insert(std::make_pair(1, 12));
xs.insert(std …The Python package manager pip is a tool to manage the installed site packages. With pip, we don't have to be worried about the package dependencies anymore. pip will download the required packages from Python Package Index automatically.
To download and install the packages from Python Package Index …
How to count the number of trailing zeros of an integer? The simplest way is
to use the built-in function __builtin_ctz():
uint64_t count(uint64_t n) {
return __builtin_ctz(n);
}
What will happen if we don't have __builtin_ctz()? If we have another
built-in function __popcount(), which can compute the Hamming weight
(the …
I came across the LLVM obfuscator today. It is a code obfuscator working mostly on LLVM IR level. This means that most LLVM supported target platforms are supported by the LLVM obfuscator as well.
Also, I have also read an article which mentioned how to disassemble and deobfuscate the binaries …
It is a well-known idiom to define a virtual destructor for the classes with virtual functions. If we don't define a virtual destructor, then the base class destructor will be invoked when you are deleting the object through the base class pointer even if the object is an instance of …
In this post, I would like to introduce the bugpoint command line tool. This is a automatic test case reduction tool which can help us generate minimal test case.
As a compiler developer, the first step to debug is to create a minimal test case which can still reproduce the …
In the past, I didn't like to install the Vim plug-ins or new syntax
highlight because all of the files were messed up in the .vim directory
which makes it difficult to uninstall a plug-in.
Recently, I have come across with Vim Vundle. It is a vim plug-in manager which …
In the part 1 of this article, we have mentioned how to pre-compile the OpenCL kernel program and load the pre-compiled binaries with the OpenCL API.
However, I was using the ioc64 command from the Intel OpenCL SDK to
pre-compile the kernel program. This command might be unavailable in the …
