gcc/testsuite/gcc.target/i386/pr57915.c

   1 /* PR rtl-optimization/57915 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-Os" } */
   4
   5 extern struct T { char a[8]; char b[16]; } t;
   6 int c;
   7 void foo (void);
   8
   9 extern inline char *
  10 baz (char *x, const char *y)
  11 {
  12   const char *e = y;
  13   unsigned long f, g;
  14   asm ("" : "+c" (f), "+D" (e) : "a" ('\0'), "X" (*e));
  15   g = e - 1 - y;
  16   __builtin_memcpy (x, y, g);
  17   x[g] = '\0';
  18   return x;
  19 }
  20
  21 void
  22 bar (void)
  23 {
  24   char d[16];
  25   baz (d, t.b);
  26
  27   for (;;)
  28     {
  29       foo ();
  30       if (c)
  31         baz (d, t.b);
  32     }
  33 }