Georg-Johann Lay wrote: > I'd like to support sibling calls for a target where function args can > be passed in call-saved registers, namely AVR.
The s390 back-end already has the very same issue. You may want to have a look at config/s390/s390.c:s390_call_saved_register_used and how it is used by s390_function_ok_for_sibcall. Bye, Ulrich -- Dr. Ulrich Weigand GNU Toolchain for Linux on System z and Cell BE ulrich.weig...@de.ibm.com
