------- Additional Comments From amodra at bigpond dot net dot au 2004-11-27 05:37 ------- This is because g1 is allocated space on the stack as a result of the following code in expand_function_start. If a function has local variables (including hidden ones like this one) then it needs a stack frame. Other ABIs can create leaf functions having local vars without necessarily creating a stack frame.
/* If function gets a static chain arg, store it in the stack frame. Do this first, so it gets the first stack slot offset. */ if (current_function_needs_context) { last_ptr = assign_stack_local (Pmode, GET_MODE_SIZE (Pmode), 0); -- What |Removed |Added ---------------------------------------------------------------------------- Severity|normal |enhancement Summary|[SYSV] -fomit-frame-pointer |[SYSV] stack frame always |has no effect on nested |made for nested functions |functions | http://gcc.gnu.org/bugzilla/show_bug.cgi?id=9383