Note the article was written in 2008 and clang was first released in 2007. "LLVM 2.2 was released on February 11, 2008, and LLVM r53339 is a snapshot of the sou

Note the article was written in 2008 and clang was first released in 2007. "LLVM 2.2 was released on February 11, 2008, and LLVM r53339 is a snapshot of the source code from July 9, 2008." They later in that paragraph describe the improvements in clang over such a short time. Also, it seems there are quite a few compiler bugs being found, even today. This looks like a very productive field of study, though the same could likely be said for software correctness in general. http://blog.regehr.org/archives/1061 http://blog.regehr.org/archives/1061 This particular paper's software (its modern equivalent) is at https://github.com/csmith-project/voltest https://github.com/csmith-project/voltest