1// PR optimization/11646
2// Origin: <nick@ilm.com>
3
4// This used to fail because the compiler inadvertently cleared
5// the EDGE_ABNORMAL flag on a EDGE_EH edge and didn't delete
6// unreachable blocks after CSE.
7
8// { dg-do compile }
9// { dg-options "-O -fgcse -fnon-call-exceptions" }
10
11struct C
12{
13  int i;
14};
15
16struct allocator
17{
18  ~allocator() throw() {}
19};
20
21struct _Vector_alloc_base
22{
23  _Vector_alloc_base(const allocator& __a) {}
24  allocator _M_data_allocator;
25  struct C *_M_start, *_M_end_of_storage;
26  void _M_deallocate(struct C* __p, unsigned int __n) {}
27};
28
29struct _Vector_base : _Vector_alloc_base
30{
31  _Vector_base(const allocator& __a) : _Vector_alloc_base(__a) { }
32  ~_Vector_base() { _M_deallocate(0, _M_end_of_storage - _M_start); }
33};
34
35struct vector : _Vector_base
36{
37  vector(const allocator& __a = allocator()) : _Vector_base(__a) {}
38  struct C& operator[](unsigned int __n) { return *_M_start; }
39};
40
41struct A
42{
43  float l() const;
44  A operator-(const A &) const;
45  const A& operator=(float) const;
46};
47
48struct B
49{
50  float d();
51};
52
53float f(const A& a, B& b)
54{
55  vector vc;
56  int index = vc[0].i;
57  A aa;
58  float d = (aa - a).l();
59  if (d > b.d()) aa = 0;
60    return b.d();
61}
62