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 
11 struct C
12 {
13   int i;
14 };
15 
16 struct allocator
17 {
throwallocator18   ~allocator() throw() {}
19 };
20 
21 struct _Vector_alloc_base
22 {
_Vector_alloc_base_Vector_alloc_base23   _Vector_alloc_base(const allocator& __a) {}
24   allocator _M_data_allocator;
25   struct C *_M_start, *_M_end_of_storage;
_M_deallocate_Vector_alloc_base26   void _M_deallocate(struct C* __p, unsigned int __n) {}
27 };
28 
29 struct _Vector_base : _Vector_alloc_base
30 {
_Vector_base_Vector_base31   _Vector_base(const allocator& __a) : _Vector_alloc_base(__a) { }
~_Vector_base_Vector_base32   ~_Vector_base() { _M_deallocate(0, _M_end_of_storage - _M_start); }
33 };
34 
35 struct vector : _Vector_base
36 {
_Vector_basevector37   vector(const allocator& __a = allocator()) : _Vector_base(__a) {}
38   struct C& operator[](unsigned int __n) { return *_M_start; }
39 };
40 
41 struct A
42 {
43   float l() const;
44   A operator-(const A &) const;
45   const A& operator=(float) const;
46 };
47 
48 struct B
49 {
50   float d();
51 };
52 
f(const A & a,B & b)53 float 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