gcc/testsuite/gcc.dg/tree-ssa/pr24627.c

   1 /* { dg-do run } */
   2 /* { dg-options "-O" } */
   3 /* { dg-require-effective-target int32plus } */
   4
   5 extern void abort (void);
   6 typedef unsigned int u_int32;
   7
   8 typedef struct {
   9   union {u_int32 Xl_ui;} Ul_i;
  10   union {u_int32 Xl_uf;} Ul_f;
  11 } l_fp;
  12
  13 void
  14 dolfptoa (short ndec)
  15 {
  16   l_fp work, ftmp;
  17
  18   work.Ul_i.Xl_ui = 0;
  19   work.Ul_f.Xl_uf = 0x535f3d8;
  20
  21   while (ndec > 0)
  22     {
  23       u_int32 lo_tmp;
  24       u_int32 hi_tmp;
  25
  26       ndec--;
  27       work.Ul_i.Xl_ui = 0;
  28       work.Ul_i.Xl_ui <<= 1;
  29       if ((work.Ul_f.Xl_uf) & 0x80000000)
  30         (work.Ul_i.Xl_ui) |= 0x1;
  31       (work.Ul_f.Xl_uf) <<= 1;
  32
  33       ftmp = work;
  34       (work.Ul_i.Xl_ui) <<= 1;
  35       if ((work.Ul_f.Xl_uf) & 0x80000000)
  36         (work.Ul_i.Xl_ui) |= 0x1;
  37       (work.Ul_f.Xl_uf) <<= 1;
  38
  39       (work.Ul_i.Xl_ui) <<= 1;
  40       if ((work.Ul_f.Xl_uf) & 0x80000000)
  41         (work.Ul_i.Xl_ui) |= 0x1;
  42       (work.Ul_f.Xl_uf) <<= 1;
  43
  44       lo_tmp = ((work.Ul_f.Xl_uf) & 0xffff) + ((ftmp.Ul_f.Xl_uf) & 0xffff);
  45       hi_tmp = (((work.Ul_f.Xl_uf) >> 16) & 0xffff)
  46                + (((ftmp.Ul_f.Xl_uf) >> 16) & 0xffff);
  47
  48       if (lo_tmp & 0x10000)
  49         hi_tmp++;
  50
  51       (work.Ul_f.Xl_uf) = ((hi_tmp & 0xffff) << 16) | (lo_tmp & 0xffff);
  52       (work.Ul_i.Xl_ui) += (ftmp.Ul_i.Xl_ui);
  53
  54       if (hi_tmp & 0x10000)
  55         (work.Ul_i.Xl_ui)++;
  56
  57
  58       if (!(work.Ul_i.Xl_ui < 10))
  59         abort ();
  60     }
  61 }
  62
  63 int main()
  64 {
  65   dolfptoa(6);
  66   return 0;
  67 }