Laurent Burgy <laurent.burgy@xxxxxxxxx> writes: > I wanted to develop something similar to __cyg_profile_func_exit but > instead of having the call site I would like to have the actual value > returned. > With gcc-4.3.3, the expand_builtin_profile_func in builtins.c makes this call: > emit_library_call (which, LCT_NORMAL, VOIDmode, 2, this, Pmode, > expand_builtin_return_addr (BUILT_IN_RETURN_ADDRESS, > 0), > Pmode); > > Is there a way to replace expand_builtin_return_addr to get the > value returned ? In principle, sure, but it means some gcc hacking. You'll have to allocate a stack slot to hold the return value, record the stack slot in cfun (adding a new field to struct function), and change expand_builtin_return_address (or add a new builtin function) to return the value in that slot. But I don't see the advantage, given that you will have to change your code anyhow to call expand_builtin_return_address. The point of __cyg_profile_func_exit is that you don't have to change your code. If you are going to change your code, there are probably much easier ways to do this. Ian
