[Bug c/56960] New: How to set up stack pointer in gcc 4.7.2

[Bug c/56960] New: How to set up stack pointer in gcc 4.7.2

[deepak.kansl at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56960

             Bug #: 56960
           Summary: How to set up stack pointer in gcc 4.7.2
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: deepak.kansl@gmail.com


void
spim_prologue(void)
{
        int i,j;

       
emit_move_insn(gen_rtx_MEM(SImode,plus_constant(stack_pointer_rtx,-0)),return_addr_rtx);
       
emit_move_insn(gen_rtx_MEM(SImode,plus_constant(stack_pointer_rtx,-4)),stack_pointer_rtx);
       
emit_move_insn(gen_rtx_MEM(SImode,plus_constant(stack_pointer_rtx,-8)),hard_frame_pointer_rtx);
        emit_move_insn(hard_frame_pointer_rtx,
plus_constant(stack_pointer_rtx,0));
        for(i=0,j=4;i<FIRST_PSEUDO_REGISTER;i++)
        {
                if(df_regs_ever_live_p(i) && !call_used_regs[i] &&
!fixed_regs[i])
                {
                       
emit_move_insn(gen_rtx_MEM(SImode,plus_constant(hard_frame_pointer_rtx,-4*j)),
gen_rtx_REG(SImode,i));
                        j++;
                }
        }
        emit_insn(gen_rtx_SET(SImode,
stack_pointer_rtx,plus_constant(hard_frame_pointer_rtx,-((3+j+1)*4+get_frame_size()))
));  //HERE is what error comes
}

The last statement of the program is producing a segmentation fault when I
compile a program. It worked fine when it was built on gcc-4.6.2 but creating
problem for 4.7.2.  Can anyone help me out?

[Bug other/56960] How to set up stack pointer in gcc 4.7.2

[pinskia at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56960

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
          Component|c                           |other
         Resolution|                            |WONTFIX

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> 2013-04-15 06:05:16 UTC ---
bugzilla is not the right place to ask this question.  Bugzilla is for bugs
against the clean sources except for the old case where you already debugged
what is going wrong.

Try using a debugger first to see why it is segfaulting and if that fails then
write to gcc@ rather than bugzilla.

Could it be because stack_pointer_rtx is NULL at this point?