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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/Constants.h"
#include "llvm/Function.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Support/GraphWriter.h"
#include "llvm/System/Path.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Config/config.h"
#include <fstream>
#include <sstream>
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 bool hasNodeAddressLabel(const SDNode *Node,
const SelectionDAG *Graph) {
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(G);
for (unsigned i = 0, e = Node->getNumValues(); i != e; ++i)
if (Node->getValueType(i) == MVT::Other)
Op += ":ch";
else
Op = Op + ":" + MVT::getValueTypeString(Node->getValueType(i));
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)) {
int offset = GADN->getOffset();
Op += ": " + GADN->getGlobal()->getName();
if (offset > 0)
Op += "+" + itostr(offset);
else
Op += itostr(offset);
} else if (const FrameIndexSDNode *FIDN = dyn_cast<FrameIndexSDNode>(Node)) {
Op += " " + itostr(FIDN->getIndex());
} else if (const ConstantPoolSDNode *CP = dyn_cast<ConstantPoolSDNode>(Node)){
if (ConstantFP *CFP = dyn_cast<ConstantFP>(CP->get()))
Op += "<" + ftostr(CFP->getValue()) + ">";
else if (ConstantInt *CI = dyn_cast<ConstantInt>(CP->get()))
Op += "<" + utostr(CI->getZExtValue()) + ">";
else {
std::ostringstream SS;
WriteAsOperand(SS, CP->get(), false);
Op += "<" + SS.str() + ">";
}
} 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 RegisterSDNode *R = dyn_cast<RegisterSDNode>(Node)) {
if (G && R->getReg() != 0 && MRegisterInfo::isPhysicalRegister(R->getReg())) {
Op = Op + " " + G->getTarget().getRegisterInfo()->getName(R->getReg());
} else {
Op += " #" + utostr(R->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()) + ">";
} else if (const VTSDNode *N = dyn_cast<VTSDNode>(Node)) {
Op = Op + " VT=" + getValueTypeString(N->getVT());
} else if (const StringSDNode *N = dyn_cast<StringSDNode>(Node)) {
Op = Op + "\"" + N->getValue() + "\"";
}
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
sys::Path TempDir = sys::Path::GetTemporaryDirectory();
sys::Path Filename = TempDir;
Filename.appendComponent("dag." + getMachineFunction().getFunction()->getName() + ".dot");
std::cerr << "Writing '" << Filename.toString() << "'... ";
std::ofstream F(Filename.toString().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.toString()).c_str())) {
std::cerr << "Error viewing graph: 'Graphviz' not in path?\n";
} else {
Filename.eraseFromDisk();
return;
}
#endif // HAVE_GRAPHVIZ
#ifdef HAVE_GV
std::cerr << "Running 'dot' program... " << std::flush;
sys::Path PSFilename = TempDir;
PSFilename.appendComponent("dag.tempgraph.ps");
if (system(("dot -Tps -Nfontname=Courier -Gsize=7.5,10 " + Filename.toString()
+ " > " + PSFilename.toString()).c_str())) {
std::cerr << "Error viewing graph: 'dot' not in path?\n";
} else {
std::cerr << "\n";
system((LLVM_PATH_GV " " + PSFilename.toString()).c_str());
system((LLVM_PATH_GV " "+TempDir.toString()+ "dag.tempgraph.ps").c_str());
}
Filename.eraseFromDisk();
PSFilename.eraseFromDisk();
return;
#endif // HAVE_GV
#endif // NDEBUG
std::cerr << "SelectionDAG::viewGraph is only available in debug builds on "
<< "systems with Graphviz or gv!\n";
#ifndef NDEBUG
Filename.eraseFromDisk();
TempDir.eraseFromDisk(true);
#endif
}
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