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[opencl/llvm.git] / lib / CodeGen / ScheduleDAGPrinter.cpp
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 //===----------------------------------------------------------------------===//
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/TargetMachine.h"
25 #include "llvm/Target/TargetRegisterInfo.h"
26 #include <fstream>
27 using namespace llvm;
29 namespace llvm {
30   template<>
31   struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
33   DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
35     static std::string getGraphName(const ScheduleDAG *G) {
36       return G->MF.getName();
37     }
39     static bool renderGraphFromBottomUp() {
40       return true;
41     }
43     static bool isNodeHidden(const SUnit *Node) {
44       return (Node->NumPreds > 10 || Node->NumSuccs > 10);
45     }
47     static bool hasNodeAddressLabel(const SUnit *Node,
48                                     const ScheduleDAG *Graph) {
49       return true;
50     }
52     /// If you want to override the dot attributes printed for a particular
53     /// edge, override this method.
54     static std::string getEdgeAttributes(const SUnit *Node,
55                                          SUnitIterator EI,
56                                          const ScheduleDAG *Graph) {
57       if (EI.isArtificialDep())
58         return "color=cyan,style=dashed";
59       if (EI.isCtrlDep())
60         return "color=blue,style=dashed";
61       return "";
62     }
65     std::string getNodeLabel(const SUnit *Node, const ScheduleDAG *Graph);
66     static std::string getNodeAttributes(const SUnit *N,
67                                          const ScheduleDAG *Graph) {
68       return "shape=Mrecord";
69     }
71     static void addCustomGraphFeatures(ScheduleDAG *G,
72                                        GraphWriter<ScheduleDAG*> &GW) {
73       return G->addCustomGraphFeatures(GW);
74     }
75   };
76 }
78 std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
79                                                        const ScheduleDAG *G) {
80   return G->getGraphNodeLabel(SU);
81 }
83 /// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
84 /// rendered using 'dot'.
85 ///
86 void ScheduleDAG::viewGraph(const Twine &Name, const Twine &Title) {
87   // This code is only for debugging!
88 #ifndef NDEBUG
89   ViewGraph(this, Name, false, Title);
90 #else
91   errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
92          << "systems with Graphviz or gv!\n";
93 #endif  // NDEBUG
94 }
96 /// Out-of-line implementation with no arguments is handy for gdb.
97 void ScheduleDAG::viewGraph() {
98   viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName());
99 }