diff options
Diffstat (limited to 'gcc/testsuite/g++.dg/torture/pr40389.C')
-rw-r--r-- | gcc/testsuite/g++.dg/torture/pr40389.C | 84 |
1 files changed, 84 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/torture/pr40389.C b/gcc/testsuite/g++.dg/torture/pr40389.C new file mode 100644 index 000000000..e3ceb1238 --- /dev/null +++ b/gcc/testsuite/g++.dg/torture/pr40389.C @@ -0,0 +1,84 @@ +/* { dg-do run } */ + +template <typename V> struct S +{ + V *f, *l; + __attribute__ ((noinline)) S (void) { f = 0, l = 0; } + void foo (V *x) + { + if (x->p != 0) + x->p->n = x->n; + else + f = x->n; + if (x->n != 0) + x->n->p = x->p; + else + l = x->p; + } + __attribute__ ((noinline)) void bar (V *x) + { + x->n = 0; + x->p = l; + if (l != 0) + l->n = x; + else + f = x; + l = x; + } +}; + +struct H; + +struct A +{ + S <H> k; +}; + +struct H +{ + A *a; + H *p, *n; + __attribute__ ((noinline)) H (void) { p = 0, n = 0, a = 0; } + __attribute__ ((noinline)) H (A *b) : a (b) + { + p = 0; + n = 0; + if (a != 0) + a->k.bar (this); + } + __attribute__ ((noinline)) H (const H &h) : a (h.a) + { + p = 0; + n = 0; + if (a != 0) + a->k.bar (this); + } + ~H (void) { if (a != 0) a->k.foo (this); } + H &operator= (const H &o) + { + if (a != 0 || &o == this) + __builtin_abort (); + a = o.a; + if (a != 0) + a->k.bar (this); + return *this; + } +}; + +__attribute__ ((noinline)) +H baz (void) +{ + return H (new A); +} + +H g; + +int +main (void) +{ + g = baz (); + if (g.a->k.f != &g) + __builtin_abort (); + return 0; +} + |