config/c6x/c6x.c

2550    [saved frame pointer (or possibly padding0)]
2551    --> incoming stack pointer, new hard frame pointer
2554    --> soft frame pointer
2555    [frame]
2567   HOST_WIDE_INT frame;
2654 /* Compute the layout of the stack frame and store it in FRAME.  */
2657 c6x_compute_frame_layout (struct c6x_frame *frame)
2663   /* We use the four bytes which are technically inside the caller's frame,
2664      usually to save the frame pointer.  */
2666   frame->padding0 = 0;
2668   frame->push_rts = false;
2669   frame->b3_offset = 0;
2672       frame->push_rts = true;
2673       frame->b3_offset = (TARGET_BIG_ENDIAN ? -12 : -13) * 4;
2682 	    frame->b3_offset -= 4;
2685   frame->nregs = nregs;
2689       frame->padding0 = 4;
2690       frame->padding1 = frame->padding2 = 0;
2691       frame->frame_pointer_offset = frame->to_allocate = 0;
2692       frame->outgoing_arguments_size = 0;
2696   if (!frame->push_rts)
2697     offset += frame->nregs * 4;
2701     /* Don't use the bottom of the caller's frame if we have no
2703     frame->padding0 = frame->padding1 = 4;
2705     frame->padding1 = 4;
2707     frame->padding1 = 0;
2709   offset += frame->padding0 + frame->padding1;
2710   frame->frame_pointer_offset = offset;
2713   frame->outgoing_arguments_size = crtl->outgoing_args_size;
2714   offset += frame->outgoing_arguments_size;
2717     frame->padding2 = 8;
2719     frame->padding2 = 4;
2720   frame->to_allocate = offset + frame->padding2;
2729   struct c6x_frame frame;
2730   c6x_compute_frame_layout (&frame);
2736     return -frame.frame_pointer_offset;
2742 	return frame.to_allocate + (frame.push_rts ? 56 : 0);
2745       return frame.to_allocate - frame.frame_pointer_offset;
2805   struct c6x_frame frame;
2811   c6x_compute_frame_layout (&frame);
2814     current_function_static_stack_size = frame.to_allocate;
2816   initial_offset = -frame.to_allocate;
2817   if (frame.push_rts)
2820       nsaved = frame.nregs;
2828     initial_offset = -frame.frame_pointer_offset - 8;
2830   if (frame.to_allocate > 0)
2833   off = -initial_offset + 4 - frame.padding0;
2859   if (nsaved < frame.nregs)
2896   gcc_assert (nsaved == frame.nregs);
2897   emit_add_sp_const (-frame.to_allocate - initial_offset, true);
2926   struct c6x_frame frame;
2931   c6x_compute_frame_layout (&frame);
2941   off = frame.to_allocate - frame.frame_pointer_offset + frame.padding1;
2942   if (frame.push_rts)
2944       nsaved = frame.nregs;
2948       if (frame.to_allocate > 32768)
2985     emit_add_sp_const (off + frame.padding0 - 4, false);
2997   gcc_assert (nsaved == frame.nregs);
3000       if (frame.push_rts)
3008 /* Return the value of the return address for the frame COUNT steps up
3009    from the current frame, after the prologue.
3010    We punt for everything but the current frame by returning const0_rtx.  */
6341   struct c6x_frame frame;
6345   c6x_compute_frame_layout (&frame);
6354 	  offset = frame.b3_offset;
6359 	  offset = frame.to_allocate - frame.b3_offset;
6741 /* Target unwind frame info is generated from dwarf CFI directives, so