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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)
{
}
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;
CheckMapIndex(node);
Debug.Assert(!(node.Map is MapAssignLhs));
access = new AccessRecord(WrittenVariable, node.Indexes[0]);
return node;
}
private void CheckMapIndex(MapAssignLhs node)
{
if (node.Indexes.Count > 1)
{
MultiDimensionalMapError();
}
}
internal bool FoundWrite()
{
return access != null;
}
internal AccessRecord GetAccess()
{
return access;
}
}
}
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