Hi Shiva, I wonder if you have any test case to demonstrate the potential code-gen issue you are concerned with.
Thanks, Yufeng On Thu, Feb 13, 2014 at 2:14 AM, Shiva Chen <shiva0...@gmail.com> wrote: > Hi, > > I have a question about the implementation of > > aarch64_final_eh_return_addr > > which is used to point out the return address of the frame > > According the source code > > If FP is not needed > > return gen_frame_mem (DImode, > plus_constant (Pmode, > stack_pointer_rtx, > fp_offset > + cfun->machine->frame.saved_regs_size > - 2 * UNITS_PER_WORD)); > > > According the frame layout > > +-------------------------------+ <-- arg_pointer_rtx > | > | callee-allocated save area > | for register varargs > | > +-------------------------------+ > | > | local variables > | > +-------------------------------+ <-- frame_pointer_rtx > | > | callee-saved registers > | > +-------------------------------+ > | LR' > +-------------------------------+ > | FP' > P+-------------------------------+ <-- hard_frame_pointer_rtx > | dynamic allocation > +-------------------------------+ > | > | outgoing stack arguments > | > +-------------------------------+ <-- stack_pointer_rtx > > Shouldn't the return value be > > return gen_frame_mem (DImode, > plus_constant (Pmode, > stack_pointer_rtx, > fp_offset > + 2* UNITS_PER_WORD)); > > Or I just mis-understanding something ? > > > Hope someone could give me a tip. > > It would be very helpful. > > Thanks > > Shiva Chen
