gcc/testsuite/gcc.c-torture/compile/20020604-1.c

   1 /* { dg-do assemble } */
   2 /* { dg-xfail-if "The array is too big" { "m6811-*-* m6812-*-*" } { "*" } { "" } } */
   3 /* { dg-skip-if "The array is too big" { "avr-*-*" } { "*" } { "" } } */
   4 /* { dg-xfail-if "The array too big" { "h8300-*-*" } { "-mno-h" "-mn" } { "" } } */
   5 /* { dg-skip-if "" { m32c-*-* } { } { } } */
   6
   7 /* PR c/6957
   8    This testcase ICEd at -O2 on IA-32, because
   9    (insn 141 139 142 (set (subreg:SF (reg:QI 72) 0)
  10            (plus:SF (reg:SF 73)
  11                (reg:SF 76))) 525 {*fop_sf_comm_nosse} (insn_list 134 (nil))
  12        (expr_list:REG_DEAD (reg:SF 73) (nil)))
  13    couldn't be reloaded. */
  14
  15 void
  16 foo (unsigned int n, int x, int y, unsigned char *z)
  17 {
  18   int a, b;
  19   float c[2048][4];
  20
  21   switch (x)
  22     {
  23     case 0x1906:
  24       a = b = -1;
  25       break;
  26     case 0x190A:
  27       a = b = -1;
  28       break;
  29     case 0x8049:
  30       a = b = -1;
  31       break;
  32     case 0x1907:
  33       a = 1;
  34       b = 2;
  35       break;
  36     default:
  37       return;
  38     }
  39
  40   if (a >= 0)
  41     {
  42       unsigned char *d = z;
  43       unsigned int i;
  44       for (i = 0; i < n; i++)
  45         {
  46           do
  47             {
  48               union
  49               {
  50                 float r;
  51                 unsigned int i;
  52               }
  53               e;
  54               e.r = c[i][1];
  55               d[a] =
  56                 ((e.i >= 0x3f7f0000) ? ((int) e.i <
  57                                             0) ? (unsigned char) 0
  58                  : (unsigned char) 255 : (e.r =
  59                                           e.r * (255.0F / 256.0F) +
  60                                           32768.0F, (unsigned char) e.i));
  61             }
  62           while (0);
  63           d += y;
  64         }
  65     }
  66
  67   if (b >= 0)
  68     {
  69       unsigned char *d = z;
  70       unsigned int i;
  71       for (i = 0; i < n; i++)
  72         {
  73           do
  74             {
  75               union
  76               {
  77                 float r;
  78                 unsigned int i;
  79               }
  80               e;
  81               e.r = c[i][2];
  82               d[b] =
  83                 ((e.i >= 0x3f7f0000) ? ((int) e.i <
  84                                             0) ? (unsigned char) 0
  85                  : (unsigned char) 255 : (e.r =
  86                                           e.r * (255.0F / 256.0F) +
  87                                           32768.0F, (unsigned char) e.i));
  88             }
  89           while (0);
  90           d += y;
  91         }
  92     }
  93 }