gcc/testsuite/gcc.dg/20030225-2.c

   1 /* { dg-do run { target ia64-*-linux* } } */
   2 /* { dg-options "-O3" } */
   3
   4 int __attribute__((noinline, const))
   5 ret4 (float value)
   6 {
   7   return 4;
   8 }
   9
  10 int __attribute__((noinline, const))
  11 ret0 (float value)
  12 {
  13   return 0;
  14 }
  15
  16 float __attribute__((noinline))
  17 test (float x, float y)
  18 {
  19   int clsx = ret4 (x);
  20   int clsy = ret0 (y);
  21
  22   if (clsx == 0 || clsy == 0
  23       || (y < 0 && clsx == 1 && clsy == 1))
  24     return x - y;
  25
  26   return x < y ? 0 : x - y;
  27 }
  28
  29 float a = 0.0, b;
  30
  31 int main (void)
  32 {
  33   unsigned long e;
  34   b = a / a;
  35   __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (e));
  36   e &= ~0x7e000UL;
  37   __asm__ __volatile__ ("mov.m ar.fpsr=%0" :: "r" (e) : "memory");
  38   a = test (0, b);
  39   __asm__ __volatile__ ("mov.m %0=ar.fpsr" : "=r" (e));
  40   if (e & 0x2000)
  41     abort ();
  42   exit (0);
  43 }