The IOC patches on this page are no longer supported because our code has been integrated into the Clang trunk where they form part of UBSan. To use UBSan, please install Clang 3.3 or newer and pass it the -fsanitize=undefined flag. IOC: An Integer Overflow Checker for C/C++ Most large C and C++ programs contain integer overflows, such as evaluating 0U - 1 or INT_MAX + 1. Integer overflows not ant