> Someone got it working on Compiler Explorer and remarked that the assembly output “reminds me of the quality of an undergraduate’s compiler assignment”. Which, to be fair, is both harsh and not entirely wrong when you look at the register spilling patterns.

This is what I've noticed about most LLM generated code, its about the quality of an undergrad, and I think there's a good reason for this - most of the code its been trained on is of undergrad quality. Stack overflow questions, a lot of undergrad open source projects, there are some professional quality open source projects (eg SqlLite) but they are outweighed by the mass of other code. Also things like Sqllite don't compare to things like Oracle or Sql Server which are proprietary.