Go's authors didn't pick LLVM because they weren't sufficiently familiar with it to implement what they needed (e.g. segmented stacks). See https://news.ycombin

Go's authors didn't pick LLVM because they weren't sufficiently familiar with it to implement what they needed (e.g. segmented stacks). See https://news.ycombinator.com/item?id=8817990 https://news.ycombinator.com/item?id=8817990 for the full explanation.