I was referring to gcc bugs. Doing Linux kernel development 20+ years ago certain complex functions with lots of register spills would occasionally trip up gcc

I was referring to gcc bugs. Doing Linux kernel development 20+ years ago certain complex functions with lots of register spills would occasionally trip up gcc's register allocator on i386. Architectures with more registers and less complex constraints on how they were used would not trigger those bugs as frequently. Eventually, gcc got better and those kinds of bugs went away, but I got to spend many hours looking at the assembly gcc produced and raw Oopsen.