1 // PR target/34403
2 // Origin: Martin Michlmayr <tbm@cyrius.com>
3
4 // { dg-do compile }
5 // { dg-options "-O" }
6
7 typedef unsigned char uint8_t;
8 typedef uint8_t uint8;
9 __extension__ typedef __SIZE_TYPE__ size_t;
10 class csVector2
11 {
12 public:float x;
13 };
14 class csBox2
15 {
16 };
17 struct iBase
18 {
19 };
20 struct iClipper2D:public virtual iBase
21 {
22 };
23 template < class Class > class scfImplementation:public virtual iBase
24 {
25 };
26 template < class Class, class I1 > class scfImplementation1:public
27 scfImplementation < Class >,
28 public I1
29 {
30 };
31 class csClipper:public scfImplementation1 < csClipper, iClipper2D >
32 {
33 };
34 class csBoxClipper:public csClipper
35 {
36 csBox2 region;
37 virtual uint8 Clip (csVector2 * InPolygon, size_t InCount,
38 csVector2 * OutPolygon, size_t & OutCount);
39 };
40 struct StatusOutputNone
41 {
42 };
43 namespace CS
44 {
45 template < typename BoxTest, typename StatusOutput > class BoxClipper
46 {
47 BoxTest boxTest;
48 StatusOutput statOut;
49 const csBox2 & region;
50 csVector2 *InP;
51 size_t InV;
52 csVector2 *OutP;
53 size_t OutV;
BoxClipper(const BoxTest & boxTest,const StatusOutput & statOut,const csBox2 & region,csVector2 * InP,size_t InV,csVector2 * OutP)54 public: BoxClipper (const BoxTest & boxTest, const StatusOutput & statOut,
55 const csBox2 & region, csVector2 * InP, size_t InV,
56 csVector2 * OutP):boxTest (boxTest), statOut (statOut),
57 region (region), InP (InP), InV (InV), OutP (OutP), OutV (-1)
58 {
59 }
Clip()60 uint8 Clip ()
61 {
62 // OutV is initialized to SIZE_MAX in the ctor above causing
63 // the multiplication below to produce a very large number
64 // in excess of the maximum possible object size (SIZE_MAX/2).
65 __builtin_memcpy (this->OutP, InP, OutV * sizeof (csVector2)); // { dg-warning "exceeds maximum object size" }
66 return 0;
67 }
68 };
69 }
70 struct BoxTestAll
71 {
72 };
73 uint8
Clip(csVector2 * InPolygon,size_t InCount,csVector2 * OutPolygon,size_t & OutCount)74 csBoxClipper::Clip (csVector2 * InPolygon, size_t InCount,
75 csVector2 * OutPolygon, size_t & OutCount)
76 {
77 BoxTestAll b;
78 StatusOutputNone n;
79 CS::BoxClipper < BoxTestAll, StatusOutputNone > boxClip (b, n, region,
80 InPolygon, InCount,
81 OutPolygon);
82 uint8 Clipped = boxClip.Clip ();
83 return 0;
84 }
85