gcc/testsuite/gcc.dg/20020729-1.c

   1 /* { dg-do compile { target i?86-*-* } } */
   2 /* { dg-skip-if "" { i?86-*-* } { "-m64" } { "" } } */
   3 /* { dg-options "-O2 -march=k6" } */
   4
   5 static inline void *
   6 baz (void *s, unsigned long c, unsigned int count)
   7 {
   8   int d0, d1;
   9   __asm__ __volatile__ (""
  10                         : "=&c" (d0), "=&D" (d1)
  11                         :"a" (c), "q" (count), "0" (count / 4), "1" ((long) s)
  12                         :"memory");
  13   return s;
  14 }
  15
  16 struct A
  17 {
  18   unsigned long *a;
  19 };
  20
  21 inline static void *
  22 bar (struct A *x, int y)
  23 {
  24   char *ptr;
  25
  26   ptr = (void *) x->a[y >> 12];
  27   ptr += y % (1UL << 12);
  28   return (void *) ptr;
  29 }
  30
  31 int
  32 foo (struct A *x, unsigned int *y, int z, int u)
  33 {
  34   int a, b, c, d, e;
  35
  36   z += *y;
  37   c = z + u;
  38   a = (z >> 12) + 1;
  39   do
  40     {
  41       b = (a << 12);
  42       d = b - z;
  43       e = c - z;
  44       if (e < d)
  45         d = e;
  46       baz (bar (x, z), 0, d);
  47       z = b;
  48       a++;
  49     }
  50   while (z < c);
  51   return 0;
  52 }