Subversion Repositories openrisc

/* PR target/7042.  When reorg.c changed branches into return insns, it

   completely forgot about any current_function_epilogue_delay_list and

   dropped those insns.  Uncovered on cris-axis-elf, where an insn in an

   epilogue delay-slot set the return-value register with the testcase

   below.  Derived from ghostscript-6.52 (GPL) by hp@axis.com.  */

typedef struct font_hints_s {

  int axes_swapped;

  int x_inverted, y_inverted;

} font_hints;

typedef struct gs_fixed_point_s {

  long x, y;

} gs_fixed_point;

int

line_hints(const font_hints *fh, const gs_fixed_point *p0,

           const gs_fixed_point *p1)

{

  long dx = p1->x - p0->x;

  long dy = p1->y - p0->y;

  long adx, ady;

  int xi = fh->x_inverted, yi = fh->y_inverted;

  int hints;

  if (xi)

    dx = -dx;

  if (yi)

    dy = -dy;

  if (fh->axes_swapped) {

    long t = dx;

    int ti = xi;

    dx = dy, xi = yi;

    dy = t, yi = ti;

  }

  adx = dx < 0 ? -dx : dx;

  ady = dy < 0 ? -dy : dy;

  if (dy != 0 && (adx <= ady >> 4)) {

    hints = dy > 0 ? 2 : 1;

    if (xi)

      hints ^= 3;

  } else if (dx != 0 && (ady <= adx >> 4)) {

    hints = dx < 0 ? 8 : 4;

    if (yi)

      hints ^= 12;

  } else

    hints = 0;

  return hints;

}

int main ()

{

  static font_hints fh[] = {{0, 1, 0}, {0, 0, 1}, {0, 0, 0}};

  static gs_fixed_point gsf[]

    = {{0x30000, 0x13958}, {0x30000, 0x18189},

       {0x13958, 0x30000}, {0x18189, 0x30000}};

  if (line_hints (fh, gsf, gsf + 1) != 1

      || line_hints (fh + 1, gsf + 2, gsf + 3) != 8

      || line_hints (fh + 2, gsf + 2, gsf + 3) != 4)

    abort ();

  exit (0);

}