gcc/testsuite/gcc.target/i386/pr25293.c

   1 /* PR target/25293 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-mpreferred-stack-boundary=2 -mtune=i586 -O2 -fomit-frame-pointer -g" } */
   4 /* { dg-require-effective-target ia32 } */
   5
   6 struct T { unsigned short t1, t2, t3, t4, t5, t6, t7; };
   7 struct S { struct T s1; unsigned short s2, s3; };
   8 unsigned short v1;
   9 int f1 (void);
  10 int f2 (struct T);
  11 int f3 (const char *);
  12
  13 int
  14 foo (struct S *x, struct T y)
  15 {
  16   unsigned short a, b, c;
  17   unsigned long d, e;
  18   int f = 0;
  19   y.t6 = 6;
  20   a = y.t7;
  21   b = y.t6;
  22   c = y.t7;
  23   switch (a)
  24     {
  25     case 8:
  26     case 7:
  27       c = 9;
  28       break;
  29     case 1:
  30     case 6:
  31     case 3:
  32       b = 16;
  33       c = 9;
  34       break;
  35     }
  36   if ((f = f1 ()))
  37     goto error;
  38   if ((f = f2 (y)))
  39     goto error;
  40   d = (long) &y;
  41   e = (long) &x->s1;
  42   __asm __volatile ("" : "+D" (e), "+S" (d) :: "memory");
  43   x->s2 = b;
  44   x->s3 = c;
  45   f3 ("foo");
  46   return 0;
  47 error:
  48   if (v1 >= 1)
  49     f3 ("bar");
  50   return f;
  51 }