alt Hacker NewsIt's a compiler backend for programming languages not a runtime JIT compiler. Especially inside a DBMS a lot of the assumptions it was built with don't hold. Some people in DBMS world (mostly at TUM with Umbra/CedarDB) have written their own and others tried multi pass approaches where you have an interpreter first then a more optimised LLVM pass later.
It was intended to solve the problem of interactive coding sessions such as with Language Servers, which GCC utterly fails at (because what we think of as modern IDEs did not exist in 1990).
An awful lot of people have tried to use it as a JIT now and had to backpedal. I'm not sure how the one lead to the other but here we are.