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package vaporize.library;
import cs132.vapor.ast.*;
import graphviz.*;
import misc.*;
import java.io.File;
import java.util.*;
public class CFGSimp extends VInstr.VisitorPR<ControlFlowGraph, String, RuntimeException> {
private boolean use_graphviz = true; // if true, generates svg files of the edges in each function
private VaporProgram vp;
private Kettle kettle;
private ArrayList<ControlFlowGraph> cfgs;
private CFGNode curr;
private String dot_format; // a list of edges to be processed by graphviz
public CFGSimp(VaporProgram vp, ArrayList<String> vapor) {
this.vp = vp;
this.kettle = new Kettle(vapor);
this.cfgs = new ArrayList<ControlFlowGraph>();
this.curr = null;
for (VFunction f : this.vp.functions) {
ControlFlowGraph cfg = new ControlFlowGraph();
this.dot_format = "";
// first visit may not find edges; cfg.addEdges will handle
this.curr = new CFGNode(f.body[0]);
cfg.setStart(curr);
MinimalLogger.info(String.format("CFGSimp is collecting nodes for %s",
this.kettle.parseFuncName(f)));
for (VCodeLabel s : f.labels) {
MinimalLogger.info(String.format("Label %d \"%s\"",
s.sourcePos.line,
this.kettle.get(s).trim()));
cfg.addNode(new CFGNode(s));
}
for (VInstr s : f.body) {
MinimalLogger.info(String.format(" Body %d \"%s\"",
s.sourcePos.line,
this.kettle.get(s).trim()));
cfg.addNode(new CFGNode(s));
}
MinimalLogger.info(String.format("CFGSimp is collecting edges for %s",
this.kettle.parseFuncName(f)));
for (VInstr s : f.body)
s.accept(cfg, this);
MinimalLogger.info(String.format("Spitting out reaching..."));
for (CFGNode n : cfg.getNodes())
MinimalLogger.info(String.format("%d ::: %s",
n.getLine(),
n.getReaching()));
if (this.use_graphviz)
this.createDotGraph(this.kettle.parseFuncName(f));
this.cfgs.add(cfg);
}
}
public ArrayList<ControlFlowGraph> getCFGs() {
return this.cfgs;
}
public void createDotGraph(String file_name) {
MinimalLogger.info(String.format("Outputting %s to %s",
this.dot_format,
file_name));
GraphViz gv = new GraphViz();
gv.addln(gv.start_graph());
gv.add(this.dot_format);
gv.addln(gv.end_graph());
String type = "svg";
gv.decreaseDpi();
gv.decreaseDpi();
gv.decreaseDpi();
gv.decreaseDpi();
File out = new File(file_name+"."+ type);
gv.writeGraphToFile( gv.getGraph( gv.getDotSource(), type ), out );
}
public String visit(ControlFlowGraph cfg, VMemRead n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
CFGNode curr = cfg.getNode(n);
this.dot_format += cfg.addEdge(this.curr, curr);
this.curr = curr;
curr.addReaching(n.dest.toString());
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
return null;
}
public String visit(ControlFlowGraph cfg, VMemWrite n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
CFGNode curr = cfg.getNode(n);
this.dot_format += cfg.addEdge(this.curr, curr);
this.curr = curr;
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
return null;
}
public String visit(ControlFlowGraph cfg, VAssign n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
CFGNode curr = cfg.getNode(n);
this.dot_format += cfg.addEdge(this.curr, curr);
this.curr = curr;
curr.addReaching(n.dest.toString());
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
return null;
}
public String visit(ControlFlowGraph cfg, VBranch n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
CFGNode curr = cfg.getNode(n);
this.dot_format += cfg.addEdge(this.curr, curr);
this.dot_format += cfg.addEdge(curr, cfg.getNode(new Integer(this.kettle
.findLabelIndex(n.target.toString()))));
this.curr = curr;
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
return null;
}
public String visit(ControlFlowGraph cfg, VGoto n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
CFGNode curr = cfg.getNode(n);
this.dot_format += cfg.addEdge(this.curr, curr);
this.dot_format += cfg.addEdge(curr,
cfg.getNode(new Integer(this.kettle
.findLabelIndex(n.target.toString()))));
this.curr = cfg.getNextNode(curr);
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
return null;
}
public String visit(ControlFlowGraph cfg, VCall n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
CFGNode curr = cfg.getNode(n);
this.dot_format += cfg.addEdge(this.curr, curr);
this.curr = curr;
if (n.dest != null)
curr.addReaching(n.dest.toString());
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
return null;
}
public String visit(ControlFlowGraph cfg, VBuiltIn n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
CFGNode curr = cfg.getNode(n);
this.dot_format += cfg.addEdge(this.curr, curr);
this.curr = curr;
if (n.dest != null)
curr.addReaching(n.dest.toString());
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
return null;
}
public String visit(ControlFlowGraph cfg, VReturn n) throws RuntimeException {
MinimalLogger.info(String.format("->%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
///////////////////////////////////////////////////////////////
CFGNode curr = cfg.getNode(n);
this.dot_format += cfg.addEdge(this.curr, curr);
this.curr = curr;
///////////////////////////////////////////////////////////////
MinimalLogger.info(String.format("<-%s (\"%s\":%s)",
n.getClass().getSimpleName(),
this.kettle.get(n).trim(),
n.sourcePos.toString()));
return null;
}
}
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