Re: Code gen error on PowerPC

[Jeffrey A Law <law at hurl dot cygnus dot com>]

  In message <4.2.0.25.19990302025929.0370ae50@mail.lauterbach.com>you write:
  > Hmm, I think this giv is setup by this hunk of code in find_mem_givs:
  > 
  >     case MEM:
  >       {
  >         rtx src_reg;
  >         rtx add_val;
  >         rtx mult_val;
  >         int benefit;
  > 
  >         benefit = general_induction_var (XEXP (x, 0),
  >                                          &src_reg, &add_val, &mult_val);
  > 
  >         /* Don't make a DEST_ADDR giv with mult_val == 1 && add_val == 0.
  >            Such a giv isn't useful.  */
  >         if (benefit > 0 && (mult_val != const1_rtx || add_val != const0_rtx
  > ))
  >           {
  >             /* Found one; record it.  */
  >             struct induction *v
  >               = (struct induction *) oballoc (sizeof (struct induction));
  > 
  >             record_giv (v, insn, src_reg, addr_placeholder, mult_val,
  >                         add_val, benefit, DEST_ADDR, not_every_iteration,
  >                         &XEXP (x, 0), loop_start, loop_end);
  > 
  >             v->mem_mode = GET_MODE (x);
  >           }
  >       }
  >       return;
  > 
  > But it's too late now and I'm not sure about anything :-) I'll continue 
  > debugging tomorrow or wednesday.
Could be.  There's a call to general_induction_var, so it is a likely
candidate.


jeff