csmith

Generates random C programs that conform to the C99 standard

Csmith is a tool that can generate random C programs that statically and dynamically conform to the C99 standard. Thus, it is useful for stress-testing compilers, static analyzers, and other tools that process C code. Csmith has found bugs in every tool that it has tested, and over the last several years we have used it to find and report more than 350 previously-unknown compiler bugs.