gcc/testsuite/g++.dg/uninit-pred-loop-1_a.cc

   1 /* { dg-do compile } */
   2 /* { dg-options "-Wuninitialized -O2" } */
   3
   4 extern int bar();
   5 int foo(void)
   6 {
   7  for (;;) {
   8    int err = ({int _err; /*  { dg-bogus "uninitialized" "false warning" } */
   9      for (int i = 0; i < 16; ++i) {
  10        _err = 17;
  11        _err = bar();
  12      }
  13      _err; /*  { dg-bogus "uninitialized" "false warning" } */
  14    });
  15
  16    if (err == 0) return 17;
  17  }
  18
  19  return 18;
  20 }
  21