TPDE-LLVM: Faster LLVM -O0 Back-End

Judging from a lot of points people find -O0 code useful. May I ask if someone from those people tell me how you find it useful? The question is based on following experience: if we have lots of C++ code then all of the std lib and ours abstractions are becoming zero cost only after inlining. Inlining implies at least -O1. Why people even build -O0 for large projects? And if a project is not large one then build times should not be that much of a problem.

Debug builds don’t need to be fast. Or, at least, the benefits you get from faster compilation or better symbols outweigh the downsides.

They do need to not be slow though, which is why I usually stick with -Og.