private void collectUsedVars(VColl vcoll, Cmd c)
{
Debug.Assert(c is PredicateCmd);
var pc = c as PredicateCmd;
collectUsedVars(vcoll, pc.Expr);
}
private ISet <Variable> getUsedVars(Implementation implementation)
{
var vcoll = new VColl();
var declaredVars = new HashSet <Variable>(implementation.InParams);
declaredVars.UnionWith(implementation.OutParams);
declaredVars.UnionWith(implementation.LocVars);
foreach (var v in declaredVars)
{
if (v.TypedIdent.WhereExpr != null)
{
collectUsedVars(vcoll, v.TypedIdent.WhereExpr);
}
}
foreach (var bb in implementation.Blocks)
{
foreach (var s in bb.Cmds)
{
collectUsedVars(vcoll, s);
}
}
foreach (var v in vcoll.usedVars)
{
addUsedVar(v);
// if (usedVarsByName.ContainsKey(v.Name))
// Debugger.Break();
}
return(vcoll.usedVars);
}
private void collectUsedVars(VColl vcoll, Expr e)
{
if (e is LiteralExpr)
{
vcoll.literals.Add(e as LiteralExpr);
}
else if (e is IdentifierExpr)
{
var ide = e as IdentifierExpr;
vcoll.addVar(ide.Decl);
}
else if (e is QuantifierExpr)
{
collectUsedVars(vcoll, (e as QuantifierExpr).Body);
}
else if (e is NAryExpr)
{
var fae = e as NAryExpr;
vcoll.functions.Add(fae.Fun);
foreach (var a in fae.Args)
{
collectUsedVars(vcoll, a);
}
}
else if (e is BvExtractExpr)
{
collectUsedVars(vcoll, (e as BvExtractExpr).Bitvector);
}
else if (e is BvConcatExpr)
{
var bve = e as BvConcatExpr;
collectUsedVars(vcoll, bve.E0);
collectUsedVars(vcoll, bve.E1);
}
else if (e is OldExpr)
{
collectUsedVars(vcoll, (e as OldExpr).Expr);
}
else
{
throw new System.Exception("Unknown Boogie2 targetE type - \"" + e.Type + "\"");
}
}