In 2014 there were the releases of LLVM 3.4 in January of last year, LLVM 3.5 mid-year, and now LLVM 3.6 is being readied for release in the weeks ahead.
In taking a look at the development statistics for upstream LLVM in 2014, it saw 12,436 commits! That's more than 34 commits per day. This commit level hasn't been seen since its early days of adoption back around 2010. With all of the commits, there were 1.53 million insertions and 1.31 million deletions.
This code churn is just for LLVM proper and not Clang or any of its sub-projects.
LLVM surpassed 2.5 million lines of code in 2014 and ended the year at 2.61 million lines of code.
The Clang C/C++ compiler front-end also had a stellar 2014. Clang saw 6,349 commits in 2014 with 417k insertions and 221k deletions.
Clang itself is approaching 1.6 million lines of code.