Dear Eric,
As advised given by you ,we defind the following marcos like
#define ARG_POINTER_REGNUM 9
#define FRAME_POINTER_REGNUM 8
#define STACK_POINTER_REGNUM 10
#define ELIMINABLE_REGS \
{{ ARG_POINTER_REGNUM, STACK_POINTER_REGNUM}, \
{ FRAME_POINTER_REGNUM, STACK_POINTER_REGNUM}} \
#define INITIAL_ELIMINATION_OFFSET(FROM, TO, OFFSET) \
(OFFSET) = tlcs_initial_elimination_offset (FROM, TO)
#define CAN_ELIMINATE 1
#define FIRST_PARM_OFFSET 3
With -O0 or by default options the frame and arg regs are not
replaced by stack reg and the same replaced with -O1 and above
optimisation.
Did the macros like ELIMINABLE_REGS ,INITIAL_ELIMINATION_OFFSET and
CAN_ELIMINATE are effective only when optimisation enabled ?? or do
we missing something here ??
Thank you and appreciate any reply from the group.
~Umesh
On Fri, Apr 25, 2014 at 9:58 PM, Eric Botcazou <ebotca...@adacore.com> wrote:
>> #define FIRST_PARM_OFFSET(FNDECL) (get_frame_size() +
>> STARTING_FRAME_OFFSET + RETURN_BYTES )
>
> I don't think that you can define FIRST_PARM_OFFSET like so, you need to have
> a fixed FIRST_PARM_OFFSET (for some definition of fixed) and eliminate the
> argument pointer during reload.
>
> --
> Eric Botcazou
