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/Function.h"
16 #include "llvm/Assembly/Writer.h"
17 #include "llvm/CodeGen/ScheduleDAG.h"
18 #include "llvm/CodeGen/MachineConstantPool.h"
19 #include "llvm/CodeGen/MachineFunction.h"
20 #include "llvm/CodeGen/MachineModuleInfo.h"
21 #include "llvm/Target/TargetRegisterInfo.h"
22 #include "llvm/Target/TargetMachine.h"
23 #include "llvm/Support/Debug.h"
24 #include "llvm/Support/GraphWriter.h"
25 #include "llvm/Support/raw_ostream.h"
26 #include "llvm/ADT/DenseSet.h"
27 #include "llvm/ADT/StringExtras.h"
28 #include <fstream>
29 using namespace llvm;
30
31 namespace llvm {
32 template<>
33 struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
34
DOTGraphTraitsllvm::DOTGraphTraits35 DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
36
getGraphNamellvm::DOTGraphTraits37 static std::string getGraphName(const ScheduleDAG *G) {
38 return G->MF.getFunction()->getName();
39 }
40
renderGraphFromBottomUpllvm::DOTGraphTraits41 static bool renderGraphFromBottomUp() {
42 return true;
43 }
44
hasNodeAddressLabelllvm::DOTGraphTraits45 static bool hasNodeAddressLabel(const SUnit *Node,
46 const ScheduleDAG *Graph) {
47 return true;
48 }
49
50 /// If you want to override the dot attributes printed for a particular
51 /// edge, override this method.
getEdgeAttributesllvm::DOTGraphTraits52 static std::string getEdgeAttributes(const SUnit *Node,
53 SUnitIterator EI,
54 const ScheduleDAG *Graph) {
55 if (EI.isArtificialDep())
56 return "color=cyan,style=dashed";
57 if (EI.isCtrlDep())
58 return "color=blue,style=dashed";
59 return "";
60 }
61
62
63 std::string getNodeLabel(const SUnit *Node, const ScheduleDAG *Graph);
getNodeAttributesllvm::DOTGraphTraits64 static std::string getNodeAttributes(const SUnit *N,
65 const ScheduleDAG *Graph) {
66 return "shape=Mrecord";
67 }
68
addCustomGraphFeaturesllvm::DOTGraphTraits69 static void addCustomGraphFeatures(ScheduleDAG *G,
70 GraphWriter<ScheduleDAG*> &GW) {
71 return G->addCustomGraphFeatures(GW);
72 }
73 };
74 }
75
getNodeLabel(const SUnit * SU,const ScheduleDAG * G)76 std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
77 const ScheduleDAG *G) {
78 return G->getGraphNodeLabel(SU);
79 }
80
81 /// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
82 /// rendered using 'dot'.
83 ///
viewGraph(const Twine & Name,const Twine & Title)84 void ScheduleDAG::viewGraph(const Twine &Name, const Twine &Title) {
85 // This code is only for debugging!
86 #ifndef NDEBUG
87 ViewGraph(this, Name, false, Title);
88 #else
89 errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
90 << "systems with Graphviz or gv!\n";
91 #endif // NDEBUG
92 }
93
94 /// Out-of-line implementation with no arguments is handy for gdb.
viewGraph()95 void ScheduleDAG::viewGraph() {
96 viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName());
97 }
98