private string CleanOriginalProgramVariable(string Name, out int Id)
{
string StrippedName = GVUtil.StripThreadIdentifier(Name, out Id);
if (globalArraySourceNames.ContainsKey(StrippedName))
{
return(globalArraySourceNames[StrippedName]);
}
else
{
return(StrippedName.TrimStart(new char[] { '$' }).Split(new char[] { '.' })[0]);
}
}
private void GetArrayNameAndAccessTypeFromAccessHasOccurredVariable(Variable v, out string ArrayName, out AccessType AccessType)
{
Debug.Assert(GVUtil.IsAccessHasOccurredVariable(v));
foreach (var CurrentAccessType in AccessType.Types)
{
var Prefix = "_" + CurrentAccessType + "_HAS_OCCURRED_";
if (v.Name.StartsWith(Prefix))
{
ArrayName = globalArraySourceNames[v.Name.Substring(Prefix.Count())];
AccessType = CurrentAccessType;
return;
}
}
Debug.Assert(false);
ArrayName = null;
AccessType = null;
}
public override Expr VisitIdentifierExpr(IdentifierExpr expr)
{
int id;
var varName = GVUtil.StripThreadIdentifier(expr.Name, out id);
if (!defs.ContainsKey(varName))
{
// The variable never assigned to in the procedure
return(base.VisitIdentifierExpr(expr));
}
else if (defs[varName] == null)
{
// The variable has been assigned to, but we do not know what was assigned.
freeVars.Add(varName);
return(base.VisitIdentifierExpr(expr));
}
else
{
return(verifier.MaybeDualise(VisitExpr(defs[varName]), id, procName));
}
}
public ModStrideConstraint GetStrideConstraint(string variable, object regionId)
{
if (!strideConstraintMap.ContainsKey(regionId))
{
return(null);
}
else
{
int id;
var strippedVariable = GVUtil.StripThreadIdentifier(variable, out id);
ModStrideConstraint msc;
if (strideConstraintMap[regionId].TryGetValue(strippedVariable, out msc))
{
return(new ModStrideConstraint(verifier.MaybeDualise(msc.mod, id, impl.Name),
verifier.MaybeDualise(msc.modEq, id, impl.Name)));
}
else
{
return(null);
}
}
}
private static Program GetOriginalProgram()
{
return(GVUtil.GetFreshProgram(CommandLineOptions.Clo.Files, false, false));
}
private void AddBarrierDivergenceCandidates(HashSet <Variable> LocalVars, Implementation Impl, IRegion region)
{
if (!verifier.ContainsBarrierCall(region) && !GPUVerifyVCGenCommandLineOptions.WarpSync)
{
return;
}
Expr guard = region.Guard();
if (guard != null && verifier.uniformityAnalyser.IsUniform(Impl.Name, guard))
{
return;
}
if (IsDisjunctionOfPredicates(guard))
{
string LoopPredicate = ((guard as NAryExpr).Args[0] as IdentifierExpr).Name;
LoopPredicate = LoopPredicate.Substring(0, LoopPredicate.IndexOf('$'));
var uniformEnabledPredicate = Expr.Eq(
// Int type used here, but it doesn't matter as we will print and then re-parse the program
new IdentifierExpr(Token.NoToken, new LocalVariable(Token.NoToken, new TypedIdent(Token.NoToken, LoopPredicate + "$1", Microsoft.Boogie.Type.Int))),
new IdentifierExpr(Token.NoToken, new LocalVariable(Token.NoToken, new TypedIdent(Token.NoToken, LoopPredicate + "$2", Microsoft.Boogie.Type.Int)))
);
verifier.AddCandidateInvariant(region, uniformEnabledPredicate, "loopPredicateEquality");
verifier.AddCandidateInvariant(region, Expr.Imp(GPUVerifier.ThreadsInSameGroup(), uniformEnabledPredicate), "loopPredicateEquality");
Dictionary <string, int> assignmentCounts = GetAssignmentCounts(Impl);
HashSet <string> alreadyConsidered = new HashSet <string>();
foreach (var v in LocalVars)
{
string lv = GVUtil.StripThreadIdentifier(v.Name);
if (alreadyConsidered.Contains(lv))
{
continue;
}
alreadyConsidered.Add(lv);
if (verifier.uniformityAnalyser.IsUniform(Impl.Name, v.Name))
{
continue;
}
if (GPUVerifier.IsPredicate(lv))
{
continue;
}
if (!assignmentCounts.ContainsKey(lv) || assignmentCounts[lv] <= 1)
{
continue;
}
if (!verifier.ContainsNamedVariable(
GetModifiedVariables(region), lv))
{
continue;
}
AddPredicatedEqualityCandidateInvariant(region, LoopPredicate, new LocalVariable(Token.NoToken, new TypedIdent(Token.NoToken, lv, Type.Int)));
}
}
}
