On Wed, Jul 22, 2015 at 05:10:04AM -0700, H.J. Lu wrote: > I got a feedback, suggesting __builtin_stack_top, instead of > __builtin_ia32_stack_top. But I don't know if > > + /* After the prologue, stack top is at -WORD(AP) in the current > + frame. */ > + emit_insn (gen_rtx_SET (target, > + plus_constant (Pmode, arg_pointer_rtx, > + -UNITS_PER_WORD))); > > is true for all backends. If it works on all backends, I can move > it to builtins.c.
It doesn't afaik. But can't you define INITIAL_FRAME_ADDRESS_RTX? Segher
