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 
35   DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
36 
37     static std::string getGraphName(const ScheduleDAG *G) {
38       return G->MF.getFunction()->getName();
39     }
40 
41     static bool renderGraphFromBottomUp() {
42       return true;
43     }
44 
45     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.
52     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);
64     static std::string getNodeAttributes(const SUnit *N,
65                                          const ScheduleDAG *Graph) {
66       return "shape=Mrecord";
67     }
68 
69     static void addCustomGraphFeatures(ScheduleDAG *G,
70                                        GraphWriter<ScheduleDAG*> &GW) {
71       return G->addCustomGraphFeatures(GW);
72     }
73   };
74 }
75 
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 ///
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.
95 void ScheduleDAG::viewGraph() {
96   viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName());
97 }
98