Most of the C related cost of a new* compiler seems to come from declarations (they are a lot nastier to figure out than they look) and the preprocessor. The r

Most of the C related cost of a new* compiler seems to come from declarations (they are a lot nastier to figure out than they look) and the preprocessor. The rest of the language doesn't seem to be that expensive to implement. And then there is the other stuff: calling conventions, per-CPU code generator, general IR optimizations. This can be very cheap if we accept poor quality of the generated code. --- Edit: I inserted the word 'new'.