Subversion Repositories openrisc_2011-10-31

/* { dg-do compile } */

/* { dg-options "-O2 -ftree-loop-distribution" } */

struct rtx_def

{

  int a;

};

typedef struct rtx_def *rtx;

struct rd {

  int alternative_enabled_p[100];

  rtx operand[100];

  int n_operands;

};

rtx this_insn;

int n_reloads;

int n_replacements;

int n_earlyclobbers;

int replace_reloads;

int hard_regs_live_known;

short* static_reload_reg_p;

struct rd recog_data;

int

find_reloads (rtx insn, int replace, int ind_levels, int live_known,

              short *reload_reg_p)

{

  int i, j;

  int noperands = replace;

  int no_input_reloads = 0;

  int n_alternatives = replace;

  char this_alternative_match_win[30];

  char this_alternative_win[30];

  char this_alternative_earlyclobber[30];

  int this_alternative_matches[30];

  int goal_alternative[30];

  int this_alternative_number;

  char goal_alternative_match_win[30];

  char goal_alternative_win[30];

  int best;

  int operand_mode[30];

  int retval = 0;

  for (this_alternative_number = 0;

       this_alternative_number < n_alternatives;

       this_alternative_number++)

    {

      int losers = 0;

      int bad = 0;

      if (!recog_data.alternative_enabled_p[this_alternative_number])

        {

          int i;

          for (i = 0; i < recog_data.n_operands; i++)

            ;

          continue;

        }

      for (i = 0; i < noperands; i++)

        if (this_alternative_earlyclobber[i]

            && (this_alternative_win[i] || this_alternative_match_win[i]))

          {

            if (j != noperands)

              {

                losers++;

                for (j = 0; j < noperands; j++)

                  if (this_alternative_matches[j] == i

                      && this_alternative_match_win[j])

                    {

                      this_alternative_win[j] = 0;

                      this_alternative_match_win[j] = 0;

                      losers++;

                    }

              }

          }

      if (losers == 0)

        {

          for (i = 0; i < noperands; i++)

            {

              goal_alternative_win[i] = 0;

              goal_alternative_match_win[i] = 0;

            }

          goto finish;

        }

      if (! bad && best > losers)

        {

          for (i = 0; i < noperands; i++)

            {

              goal_alternative[i] = 0;

              goal_alternative_win[i] = 0;

            }

        }

    }

 finish:

  for (i = 0; i < noperands; i++)

    if (! goal_alternative_win[i])

      {

        rtx op = recog_data.operand[i];

        int mode = operand_mode[i];

        if (((ix86_preferred_reload_class ((op), (goal_alternative[i])) == 2)

             || no_input_reloads)

            && mode != 0)

          {}

      }

  return retval;

}