gcc/testsuite/gcc.dg/pr42715.c

   1 /* { dg-do compile { target fpic } } */
   2 /* { dg-options "-fPIC -g -O2 -w" } */
   3 /* var-tracking failed to clobber the reg holding v at the asm insn,
   4    so v ended up bound to an intermediate PIC expression.  */
   5
   6 struct A { unsigned a1; char a2[15]; };
   7 struct B { long b1; unsigned char b2; long b3; };
   8 struct C { void *c1; unsigned c2; unsigned c3; };
   9
  10 static struct A v1;
  11 struct A *const v2 = &v1;
  12
  13 static inline
  14 int foo (void)
  15 {
  16   int *v;
  17   __asm__ __volatile__ ("" : "=r" (v));
  18   return v[1];
  19 }
  20
  21 static void
  22 bar (struct C *x)
  23 {
  24   if (x->c2 == x->c3 && x->c1)
  25     f1 (foo (), x->c1, x->c3 * sizeof (x->c1[0]));
  26 }
  27
  28 void
  29 baz (struct B *y)
  30 {
  31   int i;
  32   const char *j;
  33   char *k;
  34   char x[64];
  35   for (i = 0; i < sizeof (struct B); i++, y)
  36     {
  37       switch (y->b2)
  38         {
  39         case 0x20:
  40           if (__builtin_strchr (j, '='))
  41             continue;
  42         }
  43       switch (y->b2)
  44         {
  45         case 0x80:
  46           bar (&x);
  47           f2 (y->b3);
  48         case 0x2e:
  49         case 0x4e:
  50           break;
  51         default:
  52           if (v2->a1)
  53             f2 (y->b2);
  54         }
  55       k[0] = '\0';
  56       if (v2->a1)
  57         f2 (y->b1);
  58     }
  59 }