gcc/testsuite/gcc.dg/torture/pr47744-3.c

   1 /* { dg-do compile } */
   2
   3 typedef union rtunion_def {
   4   struct rtx_def *rtx;
   5 } rtunion;
   6 typedef struct rtx_def {
   7   unsigned short code;
   8   rtunion fld[1];
   9 } *rtx;
  10 extern rtx recog_operand[];
  11 extern rtx *recog_operand_loc[];
  12 extern int reload_n_operands;
  13 extern void find_dummy_reload (int, int);
  14 extern int asm_noperands (rtx);
  15 extern int n_occurrences (char **);
  16 char operands_match[10][10];
  17 void find_reloads (rtx insn, int n_alternatives, int commutative)
  18 {
  19   register int i, j;
  20   int noperands;
  21   char *constraints[10];
  22   int address_reloaded[10];
  23   int this_alternative[10];
  24   char this_alternative_win[10];
  25   int this_alternative_matches[10];
  26   int this_alternative_number;
  27   rtx body = ((insn)->fld[3].rtx);
  28   int operand_mode[10];
  29   if (body->code == 1)
  30     {
  31       reload_n_operands = noperands = asm_noperands (body);
  32       n_alternatives = n_occurrences (constraints);
  33     }
  34   for (this_alternative_number = 0;
  35        this_alternative_number < n_alternatives;
  36        this_alternative_number++)
  37     for (i = 0;
  38          i < noperands;
  39          i++)
  40       {
  41         register char *p = constraints[i];
  42         register int win = 0;
  43         int badop = 1;
  44         int c;
  45         register rtx operand = recog_operand[i];
  46         int force_reload = 0;
  47         this_alternative_win[i] = 0;
  48         this_alternative[i] = 1;
  49         while (*p && (c = *p++) != ',')
  50           switch (c)
  51             {
  52             case '4':
  53               c -= '0';
  54               this_alternative_matches[i] = c;
  55               if ((c != commutative
  56                    || i != commutative + 1)
  57                   && operands_match[c][i])
  58                 win = this_alternative_win[c];
  59               else
  60                 find_dummy_reload (operand_mode[i], this_alternative[c]);
  61               if (! win || force_reload)
  62                 for (j = 0; j < i; j++)
  63                   if (this_alternative_matches[j]
  64                       == this_alternative_matches[i])
  65                     badop = 1;
  66               break;
  67             case '<':
  68               if (operand->code == 2
  69                   && ! address_reloaded[i]
  70                   && operand->fld[0].rtx->code == 3)
  71                 win = 1;
  72             }
  73       }
  74 }