gcc/testsuite/gcc.dg/tree-ssa/pr71947-5.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fno-tree-vrp -fdump-tree-dom-details" } */
   3
   4
   5 static inline long load(long *p)
   6 {
   7         long ret;
   8         asm ("xyzzy      %1,%0\n\t" : "=r" (ret) : "m" (*p));
   9         if (ret != *p)
  10                 __builtin_unreachable();
  11         return ret;
  12 }
  13
  14 long foo(long *mem)
  15 {
  16         long ret;
  17         ret = load(mem);
  18         return ret - *mem;
  19 }
  20
  21 /* { dg-final { scan-tree-dump "Folded to: _\[0-9\]+ = 0;"  "dom2" } } */