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 "llvm/Config/config.h"
29 #include <fstream>
30 using namespace llvm;
31 
32 namespace llvm {
33   template<>
34   struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
35 
36   DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
37 
38     static std::string getGraphName(const ScheduleDAG *G) {
39       return G->MF.getFunction()->getName();
40     }
41 
42     static bool renderGraphFromBottomUp() {
43       return true;
44     }
45 
46     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.
53     static std::string getEdgeAttributes(const SUnit *Node,
54                                          SUnitIterator EI) {
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() {
85 // This code is only for debugging!
86 #ifndef NDEBUG
87   if (BB->getBasicBlock())
88     ViewGraph(this, "dag." + MF.getFunction()->getNameStr(), false,
89               "Scheduling-Units Graph for " + MF.getFunction()->getNameStr() +
90               ":" + BB->getBasicBlock()->getNameStr());
91   else
92     ViewGraph(this, "dag." + MF.getFunction()->getNameStr(), false,
93               "Scheduling-Units Graph for " + MF.getFunction()->getNameStr());
94 #else
95   errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
96          << "systems with Graphviz or gv!\n";
97 #endif  // NDEBUG
98 }
99