public override Implementation VisitImplementation(Implementation node) {
//Contract.Requires(node != null);
Contract.Ensures(Contract.Result<Implementation>() != null);
var impl = base.VisitImplementation((Implementation)node.Clone());
var blockDuplicationMapping = new Dictionary<Block, Block>();
// Compute the mapping between the blocks of the old implementation (node)
// and the new implementation (impl).
foreach (var blockPair in node.Blocks.Zip(impl.Blocks)) {
blockDuplicationMapping.Add(blockPair.Item1, blockPair.Item2);
}
// The GotoCmds and blocks have now been duplicated.
// Resolve GotoCmd targets to the duplicated blocks
foreach (GotoCmd gotoCmd in impl.Blocks.Select( bb => bb.TransferCmd).OfType<GotoCmd>()) {
var newLabelTargets = new List<Block>();
var newLabelNames = new List<string>();
for (int index = 0; index < gotoCmd.labelTargets.Count; ++index) {
var newBlock = blockDuplicationMapping[gotoCmd.labelTargets[index]];
newLabelTargets.Add(newBlock);
newLabelNames.Add(newBlock.Label);
}
gotoCmd.labelTargets = newLabelTargets;
gotoCmd.labelNames = newLabelNames;
}
return impl;
}
public override Implementation VisitImplementation(Implementation node) {
//Contract.Requires(node != null);
Contract.Ensures(Contract.Result<Implementation>() != null);
return base.VisitImplementation((Implementation)node.Clone());
}
