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/Constants.h"
15 #include "llvm/Assembly/Writer.h"
16 #include "llvm/CodeGen/ScheduleDAG.h"
17 #include "llvm/CodeGen/MachineConstantPool.h"
18 #include "llvm/CodeGen/MachineFunction.h"
19 #include "llvm/CodeGen/MachineModuleInfo.h"
20 #include "llvm/Target/TargetRegisterInfo.h"
21 #include "llvm/Target/TargetMachine.h"
22 #include "llvm/Support/Debug.h"
23 #include "llvm/Support/GraphWriter.h"
24 #include "llvm/Support/raw_ostream.h"
25 #include "llvm/ADT/DenseSet.h"
26 #include "llvm/ADT/StringExtras.h"
27 #include <fstream>
28 using namespace llvm;
29
30 namespace llvm {
31 template<>
32 struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
33
DOTGraphTraitsllvm::DOTGraphTraits34 DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
35
getGraphNamellvm::DOTGraphTraits36 static std::string getGraphName(const ScheduleDAG *G) {
37 return G->MF.getName();
38 }
39
renderGraphFromBottomUpllvm::DOTGraphTraits40 static bool renderGraphFromBottomUp() {
41 return true;
42 }
43
hasNodeAddressLabelllvm::DOTGraphTraits44 static bool hasNodeAddressLabel(const SUnit *Node,
45 const ScheduleDAG *Graph) {
46 return true;
47 }
48
49 /// If you want to override the dot attributes printed for a particular
50 /// edge, override this method.
getEdgeAttributesllvm::DOTGraphTraits51 static std::string getEdgeAttributes(const SUnit *Node,
52 SUnitIterator EI,
53 const ScheduleDAG *Graph) {
54 if (EI.isArtificialDep())
55 return "color=cyan,style=dashed";
56 if (EI.isCtrlDep())
57 return "color=blue,style=dashed";
58 return "";
59 }
60
61
62 std::string getNodeLabel(const SUnit *Node, const ScheduleDAG *Graph);
getNodeAttributesllvm::DOTGraphTraits63 static std::string getNodeAttributes(const SUnit *N,
64 const ScheduleDAG *Graph) {
65 return "shape=Mrecord";
66 }
67
addCustomGraphFeaturesllvm::DOTGraphTraits68 static void addCustomGraphFeatures(ScheduleDAG *G,
69 GraphWriter<ScheduleDAG*> &GW) {
70 return G->addCustomGraphFeatures(GW);
71 }
72 };
73 }
74
getNodeLabel(const SUnit * SU,const ScheduleDAG * G)75 std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
76 const ScheduleDAG *G) {
77 return G->getGraphNodeLabel(SU);
78 }
79
80 /// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
81 /// rendered using 'dot'.
82 ///
viewGraph(const Twine & Name,const Twine & Title)83 void ScheduleDAG::viewGraph(const Twine &Name, const Twine &Title) {
84 // This code is only for debugging!
85 #ifndef NDEBUG
86 ViewGraph(this, Name, false, Title);
87 #else
88 errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
89 << "systems with Graphviz or gv!\n";
90 #endif // NDEBUG
91 }
92
93 /// Out-of-line implementation with no arguments is handy for gdb.
viewGraph()94 void ScheduleDAG::viewGraph() {
95 viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName());
96 }
97