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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 "llvm/ADT/StringExtras.h"
#include "llvm/Config/config.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 bool renderGraphFromBottomUp() {
return true;
}
static std::string getNodeLabel(const SDNode *Node,
const SelectionDAG *Graph);
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, "");
}
};
}
std::string DOTGraphTraits<SelectionDAG*>::getNodeLabel(const SDNode *Node,
const SelectionDAG *G) {
std::string Op = Node->getOperationName();
for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i) {
switch (Node->getValueType(i)) {
default: Op += ":unknownvt!"; break;
case MVT::Other: Op += ":ch"; break;
case MVT::i1: Op += ":i1"; break;
case MVT::i8: Op += ":i8"; break;
case MVT::i16: Op += ":i16"; break;
case MVT::i32: Op += ":i32"; break;
case MVT::i64: Op += ":i64"; break;
case MVT::i128: Op += ":i128"; break;
case MVT::f32: Op += ":f32"; break;
case MVT::f64: Op += ":f64"; break;
case MVT::f80: Op += ":f80"; break;
case MVT::f128: Op += ":f128"; break;
case MVT::isVoid: Op += ":void"; break;
}
}
if (const ConstantSDNode *CSDN = dyn_cast<ConstantSDNode>(Node)) {
Op += ": " + utostr(CSDN->getValue());
} else if (const ConstantFPSDNode *CSDN = dyn_cast<ConstantFPSDNode>(Node)) {
Op += ": " + ftostr(CSDN->getValue());
} else if (const GlobalAddressSDNode *GADN =
dyn_cast<GlobalAddressSDNode>(Node)) {
Op += ": " + GADN->getGlobal()->getName();
} else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(Node)) {
Op += " " + itostr(FIDN->getIndex());
} else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Node)){
Op += "<" + utostr(CP->getIndex()) + ">";
} else if (const BasicBlockSDNode *BBDN = dyn_cast<BasicBlockSDNode>(Node)) {
Op = "BB: ";
const Value *LBB = (const Value*)BBDN->getBasicBlock()->getBasicBlock();
if (LBB)
Op += LBB->getName();
//Op += " " + (const void*)BBDN->getBasicBlock();
} else if (const RegSDNode *C2V = dyn_cast<RegSDNode>(Node)) {
Op += " #" + utostr(C2V->getReg());
} else if (const ExternalSymbolSDNode *ES =
dyn_cast<ExternalSymbolSDNode>(Node)) {
Op += "'" + std::string(ES->getSymbol()) + "'";
} else if (const SrcValueSDNode *M = dyn_cast<SrcValueSDNode>(Node)) {
if (M->getValue())
Op += "<" + M->getValue()->getName() + ":" + itostr(M->getOffset()) + ">";
else
Op += "<null:" + itostr(M->getOffset()) + ">";
}
return Op;
}
/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
/// rendered using 'dot'.
///
void SelectionDAG::viewGraph() {
// This code is only for debugging!
#ifndef NDEBUG
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";
#ifdef HAVE_GRAPHVIZ
std::cerr << "Running 'Graphviz' program... " << std::flush;
if (system((LLVM_PATH_GRAPHVIZ " " + Filename).c_str())) {
std::cerr << "Error viewing graph: 'Graphviz' not in path?\n";
} else {
return;
}
#endif
#ifdef HAVE_GV
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 viewing graph: 'dot' not in path?\n";
} else {
std::cerr << "\n";
system(LLVM_PATH_GV " /tmp/dag.tempgraph.ps");
}
system(("rm " + Filename + " /tmp/dag.tempgraph.ps").c_str());
return;
#endif
#endif
std::cerr << "SelectionDAG::viewGraph is only available in debug builds on "
<< "systems with Graphviz or gv!\n";
}
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