gcc/testsuite/gcc.dg/pr95580.c

   1 /* PR c/95580 */
   2 /* { dg-do compile } */
   3 /* { dg-options "-O1 -W -fno-tree-dce -fno-tree-dse" } */
   4
   5 void bar (void);
   6
   7 void
   8 foo (int x)
   9 {
  10   if (x == 0)
  11     {
  12       void *p = __builtin_malloc (4);
  13       ((char *)p)[1] ^= 1;      /* { dg-warning "may be used uninitialized" } */
  14     }
  15   bar ();
  16 }