public override StatementList AllocLocalVariables(IList <IVariable> variables)
{
StatementList stmts = new StatementList();
// we allocate an address for all local variables
// except they are a pointer, we are assuming that you can't take the address of a pointer
foreach (var v in variables)
{
if (!(v.Type is IManagedPointerType))
{
stmts.Add(dispatcher.AllocAddr(v));
}
}
// load values into stack space
foreach (var paramVariable in variables.Where(v => v.IsParameter))
{
// paramValue are variables in the three address code
// however in boogie they are treated as values
// those values are loaded into the stack memory space
/*
* void foo(int x){
* }
*
* procedure foo(x : int){
* var _x : Addr; // stack space (done in previous loop)
* x_ := AllocAddr();
*
* data(_x) := x; // we are doing this conceptually
* }
*/
var boogieParamVariable = BoogieParameter.FromDotNetVariable(paramVariable);
if (paramVariable.Type is IManagedPointerType)
{
stmts.Add(BoogieStatement.VariableAssignment(BoogieVariable.AddressVar(paramVariable), boogieParamVariable));
continue;
}
Addressable paramAddress = dispatcher.AddressOf(paramVariable);
// boogie generator knows that must fetch paramVariable's address (_x and not x)
stmts.Add(dispatcher.WriteAddr(paramAddress, boogieParamVariable));
if (Helpers.GetBoogieType(paramVariable).Equals(Helpers.BoogieType.Object))
{
stmts.Add(BoogieStatement.AllocObjectAxiom(paramVariable));
}
else if (Helpers.GetBoogieType(paramVariable).Equals(Helpers.BoogieType.Addr))
{
stmts.Add(BoogieStatement.AllocAddrAxiom(paramVariable));
}
}
return(stmts);
}
public override StatementList AllocLocalVariables(IList <IVariable> variables)
{
StatementList stmts = new StatementList();
// only allocate an address for variables that are referenced
foreach (var v in variables)
{
if (RequiresAllocation(v))
{
stmts.Add(AllocAddr(v));
}
}
foreach (var paramVariable in variables.Where(v => v.IsParameter && (RequiresAllocation(v) || (v.Type is IManagedPointerType))))
{
var boogieParamVariable = BoogieParameter.FromDotNetVariable(paramVariable);
//if (!RequiresAllocation(paramVariable))
if (paramVariable.Type is IManagedPointerType)
{
//BoogieVariable target = RequiresAllocation(paramVariable) || (paramVariable.Type is IManagedPointerType) ?
// BoogieVariable.AddressVar(paramVariable) : BoogieVariable.FromDotNetVariable(paramVariable);
BoogieVariable target = BoogieVariable.AddressVar(paramVariable);
stmts.Add(BoogieStatement.VariableAssignment(target, boogieParamVariable));
continue;
}
Addressable paramAddress = AddressOf(paramVariable);
// boogie generator knows that must fetch paramVariable's address (_x and not x)
stmts.Add(WriteAddr(paramAddress, boogieParamVariable));
if (Helpers.GetBoogieType(paramVariable).Equals(Helpers.BoogieType.Object))
{
stmts.Add(BoogieStatement.AllocObjectAxiom(paramVariable));
}
else if (Helpers.GetBoogieType(paramVariable).Equals(Helpers.BoogieType.Addr))
{
stmts.Add(BoogieStatement.AllocAddrAxiom(paramVariable));
}
}
return(stmts);
}
