Piers Cawley <[EMAIL PROTECTED]> wrote: > Leopold Toetsch <[EMAIL PROTECTED]> writes: >> As calling conventions clearly state, that the caller has to save >> everything, its probably up to imcc/pcc.c to insert above >> statements, if another sub gets called from a sub. I'll fix that in >> a minute ;-)
> If and only if that's not a tail call of course. Good point. But I can imagine, that's by far more simple to detect tail calls at the AST level then inside the flattened code parrot sees. So the HL can emit (a TBD) flag like "tailcall" appended to the .pcc_call sequence. Then the call can be optimized to a C<jump> opcode. The construction of the subroutine object (which is outside of the call sequence) will lead to an used once LHS, which the optimizer already can get rid of. leo
