gcc/testsuite/gcc.target/i386/pr55775.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O1" } */
   3
   4 int *ptr;
   5 int *fn1 (int *);
   6 int fn2 (int, int);
   7 int fn3 (void);
   8 int fn4 (int);
   9
  10 static int
  11 foo (int x, int y, int z)
  12 {
  13   int b;
  14   asm ("" : "=a" (b), "=&d" (x) : "0" (y), "1" (x), "mr" (z));
  15   return x;
  16 }
  17
  18 static int
  19 bar (int x, int y)
  20 {
  21   int a;
  22   if (!y)
  23     {
  24       for (a = 0; a <= (x >> 1); )
  25         ;
  26       a = foo (y, fn2 (2, x), x);
  27       if (x)
  28         a = x;
  29       return a;
  30     }
  31 }
  32
  33 static int
  34 baz (int x, int y)
  35 {
  36   int *a = ptr;
  37   int t, xk1 = fn3 (), xk = x * xk1;
  38   for (t = 0; t < xk; t += xk1)
  39     {
  40       if (fn4 (a[2]))
  41         return -y;
  42       a = fn1 (a);
  43     }
  44   return 0;
  45 }
  46
  47 void
  48 test (int x, long y, int z)
  49 {
  50   int a = fn3 ();
  51   int b;
  52   int c = bar (x, z);
  53   for (b = 0; b <= y; b++)
  54     c = baz (x, c);
  55   fn2 (c, a);
  56 }