public bool IsBranchTarget(ActionBlock block)
{
if (null == block)
{
throw new ArgumentNullException("block");
}
foreach (ActionBlock p in block.Predecessors)
{
switch (p.ActionType)
{
case ActionType.Branch:
BranchActionBlock br = (BranchActionBlock)p;
if (br.Target == block)
{
return(true);
}
break;
case ActionType.ConditionalBranch:
ConditionalBranchActionBlock cbr = (ConditionalBranchActionBlock)p;
if (cbr.Then == block)
{
return(true);
}
break;
}
}
return(false);
}
void ConnectActionBlocks()
{
for (int i = 0; i < _blocks.Count; ++i)
{
ActionBlock block = _blocks [i];
switch (block.ActionType)
{
case ActionType.Branch:
BranchActionBlock br = (BranchActionBlock)block;
br.SetTarget(GetBranchTarget(br.SourceInstruction));
break;
case ActionType.ConditionalBranch:
ConditionalBranchActionBlock cbr = (ConditionalBranchActionBlock)block;
cbr.SetTargets(GetBranchTarget(cbr.SourceInstruction), GetBlockAtOrNull(i + 1));
break;
case ActionType.Return:
break;
default:
AbstractFallThroughActionBlock ftb = (AbstractFallThroughActionBlock)block;
ftb.SetNext(GetBlockAtOrNull(i + 1));
break;
}
}
}
private ActionBlock OnBranch(BranchActionBlock block)
{
return block.Target;
}
void WriteBranch (ActionFlowGraph afg, BranchActionBlock block)
{
WriteGoto (afg, block.Target);
}