gnu/dist/gcc4/gcc/testsuite/gcc.c-torture/execute/20020615-1.c

   1 /* PR target/7042.  When reorg.c changed branches into return insns, it
   2    completely forgot about any current_function_epilogue_delay_list and
   3    dropped those insns.  Uncovered on cris-axis-elf, where an insn in an
   4    epilogue delay-slot set the return-value register with the testcase
   5    below.  Derived from ghostscript-6.52 (GPL) by hp@axis.com.  */
   6
   7 typedef struct font_hints_s {
   8   int axes_swapped;
   9   int x_inverted, y_inverted;
  10 } font_hints;
  11 typedef struct gs_fixed_point_s {
  12   long x, y;
  13 } gs_fixed_point;
  14
  15 int
  16 line_hints(const font_hints *fh, const gs_fixed_point *p0,
  17            const gs_fixed_point *p1)
  18 {
  19   long dx = p1->x - p0->x;
  20   long dy = p1->y - p0->y;
  21   long adx, ady;
  22   int xi = fh->x_inverted, yi = fh->y_inverted;
  23   int hints;
  24   if (xi)
  25     dx = -dx;
  26   if (yi)
  27     dy = -dy;
  28   if (fh->axes_swapped) {
  29     long t = dx;
  30     int ti = xi;
  31     dx = dy, xi = yi;
  32     dy = t, yi = ti;
  33   }
  34   adx = dx < 0 ? -dx : dx;
  35   ady = dy < 0 ? -dy : dy;
  36   if (dy != 0 && (adx <= ady >> 4)) {
  37     hints = dy > 0 ? 2 : 1;
  38     if (xi)
  39       hints ^= 3;
  40   } else if (dx != 0 && (ady <= adx >> 4)) {
  41     hints = dx < 0 ? 8 : 4;
  42     if (yi)
  43       hints ^= 12;
  44   } else
  45     hints = 0;
  46   return hints;
  47 }
  48 int main ()
  49 {
  50   static font_hints fh[] = {{0, 1, 0}, {0, 0, 1}, {0, 0, 0}};
  51   static gs_fixed_point gsf[]
  52     = {{0x30000, 0x13958}, {0x30000, 0x18189},
  53        {0x13958, 0x30000}, {0x18189, 0x30000}};
  54   if (line_hints (fh, gsf, gsf + 1) != 1
  55       || line_hints (fh + 1, gsf + 2, gsf + 3) != 8
  56       || line_hints (fh + 2, gsf + 2, gsf + 3) != 4)
  57     abort ();
  58   exit (0);
  59 }