gcc/testsuite/gcc.dg/dfp/ddmode-ice.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1" } */
   3
   4 /* This used to result in an ICE.  */
   5
   6 _Decimal64 y[258][258];
   7 _Decimal64 dd[258][258];
   8 _Decimal64 ry[258][258];
   9 _Decimal64
  10 foo (void)
  11 {
  12   int i;
  13   int j;
  14   int m;
  15   int im;
  16   int jm;
  17   int ip;
  18   int jp;
  19   int i2m;
  20   int i1p;
  21   _Decimal64 a;
  22   _Decimal64 b;
  23   _Decimal64 c;
  24   _Decimal64 qi;
  25   _Decimal64 qj;
  26   _Decimal64 xx;
  27   _Decimal64 yx;
  28   _Decimal64 xy;
  29   _Decimal64 yy;
  30   _Decimal64 rel;
  31   _Decimal64 qxx;
  32   _Decimal64 qyy;
  33   _Decimal64 qxy;
  34   do
  35     {
  36       jp = j + 1;
  37       for (i = i1p; i <= i2m; i++)
  38         {
  39           ip = i + 1;
  40           yx = y[ip][j] - y[im][j];
  41           yy = y[i][jp] - y[i][jm];
  42           a = 0.25dd * (xy * xy + yy * yy);
  43           b = 0.25dd * (xx * xx + yx * yx);
  44           c = 0.125dd * (xx * xy + yx * yy);
  45           qj = 0.0dd;
  46           dd[i][m] = b + a * rel + b;
  47           qxx = y[ip][j] - 2.0dd * y[i][j] + y[im][j];
  48           qyy = y[i][jp] - 2.0dd * y[i][j] + y[i][jm];
  49           qxy = y[ip][jp] - y[ip][jm] - y[im][jp] + y[im][jm];
  50           ry[i][m] = a * qxx + b * qyy - c * qxy + yx * qi + yy * qj;
  51         }
  52     }
  53   while (1);
  54 }