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//===-- SelectionDAGPrinter.cpp - Implement SelectionDAG::viewGraph() -----===//
//
// The LLVM Compiler Infrastructure
//
// This file was developed by the LLVM research group and is distributed under
// the University of Illinois Open Source License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This implements the SelectionDAG::viewGraph method.
//
//===----------------------------------------------------------------------===//
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Function.h"
#include "llvm/Support/GraphWriter.h"
#include <fstream>
using namespace llvm;
namespace llvm {
template<>
struct DOTGraphTraits<SelectionDAG*> : public DefaultDOTGraphTraits {
static std::string getGraphName(const SelectionDAG *G) {
return G->getMachineFunction().getFunction()->getName();
}
static std::string getNodeLabel(const SDNode *Node,
const SelectionDAG *Graph) {
return Node->getOperationName();
}
static std::string getNodeAttributes(const SDNode *N) {
return "shape=Mrecord";
}
static void addCustomGraphFeatures(SelectionDAG *G,
GraphWriter<SelectionDAG*> &GW) {
GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot");
GW.emitEdge(0, -1, G->getRoot().Val, -1, "");
}
};
}
/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
/// rendered using 'dot'.
///
void SelectionDAG::viewGraph() {
std::string Filename = "/tmp/dag." +
getMachineFunction().getFunction()->getName() + ".dot";
std::cerr << "Writing '" << Filename << "'... ";
std::ofstream F(Filename.c_str());
if (!F) {
std::cerr << " error opening file for writing!\n";
return;
}
WriteGraph(F, this);
F.close();
std::cerr << "\n";
std::cerr << "Running 'dot' program... " << std::flush;
if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename
+ " > /tmp/dag.tempgraph.ps").c_str())) {
std::cerr << "Error running dot: 'dot' not in path?\n";
} else {
std::cerr << "\n";
system("gv /tmp/dag.tempgraph.ps");
}
system(("rm " + Filename + " /tmp/dag.tempgraph.ps").c_str());
}
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