gcc/testsuite/g++.dg/ubsan/align-1.C

   1 // { dg-do run }
   2 // { dg-options "-fsanitize=alignment -Wall -Wno-unused-variable -std=c++11" }
   3
   4 typedef const long int L;
   5 int a = 1;
   6 L b = 2;
   7
   8 int
   9 main (void)
  10 {
  11   int *p = &a;
  12   L *l = &b;
  13
  14   int &r = *p;
  15   auto &r2 = *p;
  16   L &lr = *l;
  17
  18   // Try an rvalue reference.
  19   auto &&r3 = *p;
  20
  21   // Don't evaluate the reference initializer twice.
  22   int i = 1;
  23   int *q = &i;
  24   int &qr = ++*q;
  25   if (i != 2)
  26     __builtin_abort ();
  27 }