llvm-6502/lib/CodeGen/SelectionDAG/SelectionDAGPrinter.cpp
Dan Gohman 5b69fe767c Add edge source labels to SelectionDAG graphs, now that the graph printing
framework omits differentiated edge sources in the case where the labels
are empty strings.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@90254 91177308-0d34-0410-b5e6-96231b3b80d8
2009-12-01 19:20:00 +00:00

302 lines
9.6 KiB
C++

//===-- SelectionDAGPrinter.cpp - Implement SelectionDAG::viewGraph() -----===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This implements the SelectionDAG::viewGraph method.
//
//===----------------------------------------------------------------------===//
#include "ScheduleDAGSDNodes.h"
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/Assembly/Writer.h"
#include "llvm/CodeGen/SelectionDAG.h"
#include "llvm/CodeGen/MachineConstantPool.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/PseudoSourceValue.h"
#include "llvm/Analysis/DebugInfo.h"
#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/GraphWriter.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Config/config.h"
using namespace llvm;
namespace llvm {
template<>
struct DOTGraphTraits<SelectionDAG*> : public DefaultDOTGraphTraits {
explicit DOTGraphTraits(bool isSimple=false) :
DefaultDOTGraphTraits(isSimple) {}
static bool hasEdgeDestLabels() {
return true;
}
static unsigned numEdgeDestLabels(const void *Node) {
return ((const SDNode *) Node)->getNumValues();
}
static std::string getEdgeDestLabel(const void *Node, unsigned i) {
return ((const SDNode *) Node)->getValueType(i).getEVTString();
}
template<typename EdgeIter>
static std::string getEdgeSourceLabel(const void *Node, EdgeIter I) {
return itostr(I - SDNodeIterator::begin((SDNode *) Node));
}
/// edgeTargetsEdgeSource - This method returns true if this outgoing edge
/// should actually target another edge source, not a node. If this method
/// is implemented, getEdgeTarget should be implemented.
template<typename EdgeIter>
static bool edgeTargetsEdgeSource(const void *Node, EdgeIter I) {
return true;
}
/// getEdgeTarget - If edgeTargetsEdgeSource returns true, this method is
/// called to determine which outgoing edge of Node is the target of this
/// edge.
template<typename EdgeIter>
static EdgeIter getEdgeTarget(const void *Node, EdgeIter I) {
SDNode *TargetNode = *I;
SDNodeIterator NI = SDNodeIterator::begin(TargetNode);
std::advance(NI, I.getNode()->getOperand(I.getOperand()).getResNo());
return NI;
}
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;
}
/// If you want to override the dot attributes printed for a particular
/// edge, override this method.
template<typename EdgeIter>
static std::string getEdgeAttributes(const void *Node, EdgeIter EI) {
SDValue Op = EI.getNode()->getOperand(EI.getOperand());
EVT VT = Op.getValueType();
if (VT == MVT::Flag)
return "color=red,style=bold";
else if (VT == MVT::Other)
return "color=blue,style=dashed";
return "";
}
static std::string getSimpleNodeLabel(const SDNode *Node,
const SelectionDAG *G) {
std::string Result = Node->getOperationName(G);
{
raw_string_ostream OS(Result);
Node->print_details(OS, G);
}
return Result;
}
std::string getNodeLabel(const SDNode *Node, const SelectionDAG *Graph);
static std::string getNodeAttributes(const SDNode *N,
const SelectionDAG *Graph) {
#ifndef NDEBUG
const std::string &Attrs = Graph->getGraphAttrs(N);
if (!Attrs.empty()) {
if (Attrs.find("shape=") == std::string::npos)
return std::string("shape=Mrecord,") + Attrs;
else
return Attrs;
}
#endif
return "shape=Mrecord";
}
static void addCustomGraphFeatures(SelectionDAG *G,
GraphWriter<SelectionDAG*> &GW) {
GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot");
if (G->getRoot().getNode())
GW.emitEdge(0, -1, G->getRoot().getNode(), G->getRoot().getResNo(),
"color=blue,style=dashed");
}
};
}
std::string DOTGraphTraits<SelectionDAG*>::getNodeLabel(const SDNode *Node,
const SelectionDAG *G) {
return DOTGraphTraits<SelectionDAG*>::getSimpleNodeLabel(Node, G);
}
/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
/// rendered using 'dot'.
///
void SelectionDAG::viewGraph(const std::string &Title) {
// This code is only for debugging!
#ifndef NDEBUG
ViewGraph(this, "dag." + getMachineFunction().getFunction()->getNameStr(),
false, Title);
#else
errs() << "SelectionDAG::viewGraph is only available in debug builds on "
<< "systems with Graphviz or gv!\n";
#endif // NDEBUG
}
// This overload is defined out-of-line here instead of just using a
// default parameter because this is easiest for gdb to call.
void SelectionDAG::viewGraph() {
viewGraph("");
}
/// clearGraphAttrs - Clear all previously defined node graph attributes.
/// Intended to be used from a debugging tool (eg. gdb).
void SelectionDAG::clearGraphAttrs() {
#ifndef NDEBUG
NodeGraphAttrs.clear();
#else
errs() << "SelectionDAG::clearGraphAttrs is only available in debug builds"
<< " on systems with Graphviz or gv!\n";
#endif
}
/// setGraphAttrs - Set graph attributes for a node. (eg. "color=red".)
///
void SelectionDAG::setGraphAttrs(const SDNode *N, const char *Attrs) {
#ifndef NDEBUG
NodeGraphAttrs[N] = Attrs;
#else
errs() << "SelectionDAG::setGraphAttrs is only available in debug builds"
<< " on systems with Graphviz or gv!\n";
#endif
}
/// getGraphAttrs - Get graph attributes for a node. (eg. "color=red".)
/// Used from getNodeAttributes.
const std::string SelectionDAG::getGraphAttrs(const SDNode *N) const {
#ifndef NDEBUG
std::map<const SDNode *, std::string>::const_iterator I =
NodeGraphAttrs.find(N);
if (I != NodeGraphAttrs.end())
return I->second;
else
return "";
#else
errs() << "SelectionDAG::getGraphAttrs is only available in debug builds"
<< " on systems with Graphviz or gv!\n";
return std::string("");
#endif
}
/// setGraphColor - Convenience for setting node color attribute.
///
void SelectionDAG::setGraphColor(const SDNode *N, const char *Color) {
#ifndef NDEBUG
NodeGraphAttrs[N] = std::string("color=") + Color;
#else
errs() << "SelectionDAG::setGraphColor is only available in debug builds"
<< " on systems with Graphviz or gv!\n";
#endif
}
/// setSubgraphColorHelper - Implement setSubgraphColor. Return
/// whether we truncated the search.
///
bool SelectionDAG::setSubgraphColorHelper(SDNode *N, const char *Color, DenseSet<SDNode *> &visited,
int level, bool &printed) {
bool hit_limit = false;
#ifndef NDEBUG
if (level >= 20) {
if (!printed) {
printed = true;
DEBUG(errs() << "setSubgraphColor hit max level\n");
}
return true;
}
unsigned oldSize = visited.size();
visited.insert(N);
if (visited.size() != oldSize) {
setGraphColor(N, Color);
for(SDNodeIterator i = SDNodeIterator::begin(N), iend = SDNodeIterator::end(N);
i != iend;
++i) {
hit_limit = setSubgraphColorHelper(*i, Color, visited, level+1, printed) || hit_limit;
}
}
#else
errs() << "SelectionDAG::setSubgraphColor is only available in debug builds"
<< " on systems with Graphviz or gv!\n";
#endif
return hit_limit;
}
/// setSubgraphColor - Convenience for setting subgraph color attribute.
///
void SelectionDAG::setSubgraphColor(SDNode *N, const char *Color) {
#ifndef NDEBUG
DenseSet<SDNode *> visited;
bool printed = false;
if (setSubgraphColorHelper(N, Color, visited, 0, printed)) {
// Visually mark that we hit the limit
if (strcmp(Color, "red") == 0) {
setSubgraphColorHelper(N, "blue", visited, 0, printed);
} else if (strcmp(Color, "yellow") == 0) {
setSubgraphColorHelper(N, "green", visited, 0, printed);
}
}
#else
errs() << "SelectionDAG::setSubgraphColor is only available in debug builds"
<< " on systems with Graphviz or gv!\n";
#endif
}
std::string ScheduleDAGSDNodes::getGraphNodeLabel(const SUnit *SU) const {
std::string s;
raw_string_ostream O(s);
O << "SU(" << SU->NodeNum << "): ";
if (SU->getNode()) {
SmallVector<SDNode *, 4> FlaggedNodes;
for (SDNode *N = SU->getNode(); N; N = N->getFlaggedNode())
FlaggedNodes.push_back(N);
while (!FlaggedNodes.empty()) {
O << DOTGraphTraits<SelectionDAG*>
::getSimpleNodeLabel(FlaggedNodes.back(), DAG);
FlaggedNodes.pop_back();
if (!FlaggedNodes.empty())
O << "\n ";
}
} else {
O << "CROSS RC COPY";
}
return O.str();
}
void ScheduleDAGSDNodes::getCustomGraphFeatures(GraphWriter<ScheduleDAG*> &GW) const {
if (DAG) {
// Draw a special "GraphRoot" node to indicate the root of the graph.
GW.emitSimpleNode(0, "plaintext=circle", "GraphRoot");
const SDNode *N = DAG->getRoot().getNode();
if (N && N->getNodeId() != -1)
GW.emitEdge(0, -1, &SUnits[N->getNodeId()], -1,
"color=blue,style=dashed");
}
}