1 //===-- ScheduleDAGPrinter.cpp - Implement ScheduleDAG::viewGraph() -------===//
2 //
3 // The LLVM Compiler Infrastructure
4 //
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
7 //
8 //===----------------------------------------------------------------------===//
9 //
10 // This implements the ScheduleDAG::viewGraph method.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #include "llvm/CodeGen/ScheduleDAG.h"
15 #include "llvm/ADT/DenseSet.h"
16 #include "llvm/ADT/StringExtras.h"
17 #include "llvm/CodeGen/MachineConstantPool.h"
18 #include "llvm/CodeGen/MachineFunction.h"
19 #include "llvm/CodeGen/MachineModuleInfo.h"
20 #include "llvm/IR/Constants.h"
21 #include "llvm/Support/Debug.h"
22 #include "llvm/Support/GraphWriter.h"
23 #include "llvm/Support/raw_ostream.h"
24 #include "llvm/Target/TargetRegisterInfo.h"
25 #include <fstream>
26 using namespace llvm;
27
28 namespace llvm {
29 template<>
30 struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
31
DOTGraphTraitsllvm::DOTGraphTraits32 DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
33
getGraphNamellvm::DOTGraphTraits34 static std::string getGraphName(const ScheduleDAG *G) {
35 return G->MF.getName();
36 }
37
renderGraphFromBottomUpllvm::DOTGraphTraits38 static bool renderGraphFromBottomUp() {
39 return true;
40 }
41
isNodeHiddenllvm::DOTGraphTraits42 static bool isNodeHidden(const SUnit *Node) {
43 return (Node->NumPreds > 10 || Node->NumSuccs > 10);
44 }
45
hasNodeAddressLabelllvm::DOTGraphTraits46 static bool hasNodeAddressLabel(const SUnit *Node,
47 const ScheduleDAG *Graph) {
48 return true;
49 }
50
51 /// If you want to override the dot attributes printed for a particular
52 /// edge, override this method.
getEdgeAttributesllvm::DOTGraphTraits53 static std::string getEdgeAttributes(const SUnit *Node,
54 SUnitIterator EI,
55 const ScheduleDAG *Graph) {
56 if (EI.isArtificialDep())
57 return "color=cyan,style=dashed";
58 if (EI.isCtrlDep())
59 return "color=blue,style=dashed";
60 return "";
61 }
62
63
64 std::string getNodeLabel(const SUnit *Node, const ScheduleDAG *Graph);
getNodeAttributesllvm::DOTGraphTraits65 static std::string getNodeAttributes(const SUnit *N,
66 const ScheduleDAG *Graph) {
67 return "shape=Mrecord";
68 }
69
addCustomGraphFeaturesllvm::DOTGraphTraits70 static void addCustomGraphFeatures(ScheduleDAG *G,
71 GraphWriter<ScheduleDAG*> &GW) {
72 return G->addCustomGraphFeatures(GW);
73 }
74 };
75 }
76
getNodeLabel(const SUnit * SU,const ScheduleDAG * G)77 std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
78 const ScheduleDAG *G) {
79 return G->getGraphNodeLabel(SU);
80 }
81
82 /// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
83 /// rendered using 'dot'.
84 ///
viewGraph(const Twine & Name,const Twine & Title)85 void ScheduleDAG::viewGraph(const Twine &Name, const Twine &Title) {
86 // This code is only for debugging!
87 #ifndef NDEBUG
88 ViewGraph(this, Name, false, Title);
89 #else
90 errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
91 << "systems with Graphviz or gv!\n";
92 #endif // NDEBUG
93 }
94
95 /// Out-of-line implementation with no arguments is handy for gdb.
viewGraph()96 void ScheduleDAG::viewGraph() {
97 viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName());
98 }
99