blob: 00ca63c5e1597557b3232d23021ad2abb8614491 (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Diagnostics;
using Microsoft.Boogie;
using Microsoft.Basetypes;
namespace GPUVerify
{
class WriteCollector : AccessCollector
{
private AccessRecord access = null;
public WriteCollector(IKernelArrayInfo NonLocalState)
: base(NonLocalState)
{
}
public override AssignLhs VisitSimpleAssignLhs(SimpleAssignLhs node)
{
Debug.Assert(NoWrittenVariable());
if (NonLocalState.Contains(node.DeepAssignedVariable))
{
access = new AccessRecord(node.DeepAssignedVariable, null, null, null);
}
return node;
}
private bool NoWrittenVariable()
{
return access == null;
}
public override AssignLhs VisitMapAssignLhs(MapAssignLhs node)
{
Debug.Assert(NoWrittenVariable());
if (!NonLocalState.Contains(node.DeepAssignedVariable))
{
return node;
}
Variable WrittenVariable = node.DeepAssignedVariable;
MapAssignLhs MapAssignX = node;
CheckMapIndex(MapAssignX);
Expr IndexX = MapAssignX.Indexes[0];
Expr IndexY = null;
Expr IndexZ = null;
if (MapAssignX.Map is MapAssignLhs)
{
MapAssignLhs MapAssignY = MapAssignX.Map as MapAssignLhs;
CheckMapIndex(MapAssignY);
IndexY = MapAssignY.Indexes[0];
if (MapAssignY.Map is MapAssignLhs)
{
MapAssignLhs MapAssignZ = MapAssignY.Map as MapAssignLhs;
CheckMapIndex(MapAssignZ);
IndexZ = MapAssignZ.Indexes[0];
if (!(MapAssignZ.Map is SimpleAssignLhs))
{
Console.WriteLine("*** Error - maps with more than three levels of nesting are not supported");
Environment.Exit(1);
}
}
else
{
Debug.Assert(MapAssignY.Map is SimpleAssignLhs);
}
}
else
{
Debug.Assert(MapAssignX.Map is SimpleAssignLhs);
}
access = new AccessRecord(WrittenVariable, IndexZ, IndexY, IndexX);
return MapAssignX;
}
private void CheckMapIndex(MapAssignLhs node)
{
if (node.Indexes.Count > 1)
{
MultiDimensionalMapError();
}
}
internal bool FoundWrite()
{
return access != null;
}
internal AccessRecord GetAccess()
{
return access;
}
}
}
|
