1 files changed, 97 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/ScheduleDAGPrinter.cpp b/llvm/lib/CodeGen/ScheduleDAGPrinter.cpp
new file mode 100644
index 0000000000000..8d04711f07c64
--- /dev/null
+++ b/llvm/lib/CodeGen/ScheduleDAGPrinter.cpp
@@ -0,0 +1,97 @@
+//===-- ScheduleDAGPrinter.cpp - Implement ScheduleDAG::viewGraph() -------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// This implements the ScheduleDAG::viewGraph method.
+//
+//===----------------------------------------------------------------------===//
+
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/CodeGen/MachineConstantPool.h"
+#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/ScheduleDAG.h"
+#include "llvm/CodeGen/TargetRegisterInfo.h"
+#include "llvm/IR/Constants.h"
+#include "llvm/Support/Debug.h"
+#include "llvm/Support/GraphWriter.h"
+#include "llvm/Support/raw_ostream.h"
+using namespace llvm;
+
+namespace llvm {
+  template<>
+  struct DOTGraphTraits<ScheduleDAG*> : public DefaultDOTGraphTraits {
+
+  DOTGraphTraits (bool isSimple=false) : DefaultDOTGraphTraits(isSimple) {}
+
+    static std::string getGraphName(const ScheduleDAG *G) {
+      return G->MF.getName();
+    }
+
+    static bool renderGraphFromBottomUp() {
+      return true;
+    }
+
+    static bool isNodeHidden(const SUnit *Node) {
+      return (Node->NumPreds > 10 || Node->NumSuccs > 10);
+    }
+
+    static std::string getNodeIdentifierLabel(const SUnit *Node,
+                                              const ScheduleDAG *Graph) {
+      std::string R;
+      raw_string_ostream OS(R);
+      OS << static_cast<const void *>(Node);
+      return R;
+    }
+
+    /// If you want to override the dot attributes printed for a particular
+    /// edge, override this method.
+    static std::string getEdgeAttributes(const SUnit *Node,
+                                         SUnitIterator EI,
+                                         const ScheduleDAG *Graph) {
+      if (EI.isArtificialDep())
+        return "color=cyan,style=dashed";
+      if (EI.isCtrlDep())
+        return "color=blue,style=dashed";
+      return "";
+    }
+
+
+    std::string getNodeLabel(const SUnit *SU, const ScheduleDAG *Graph);
+    static std::string getNodeAttributes(const SUnit *N,
+                                         const ScheduleDAG *Graph) {
+      return "shape=Mrecord";
+    }
+
+    static void addCustomGraphFeatures(ScheduleDAG *G,
+                                       GraphWriter<ScheduleDAG*> &GW) {
+      return G->addCustomGraphFeatures(GW);
+    }
+  };
+}
+
+std::string DOTGraphTraits<ScheduleDAG*>::getNodeLabel(const SUnit *SU,
+                                                       const ScheduleDAG *G) {
+  return G->getGraphNodeLabel(SU);
+}
+
+/// viewGraph - Pop up a ghostview window with the reachable parts of the DAG
+/// rendered using 'dot'.
+///
+void ScheduleDAG::viewGraph(const Twine &Name, const Twine &Title) {
+  // This code is only for debugging!
+#ifndef NDEBUG
+  ViewGraph(this, Name, false, Title);
+#else
+  errs() << "ScheduleDAG::viewGraph is only available in debug builds on "
+         << "systems with Graphviz or gv!\n";
+#endif  // NDEBUG
+}
+
+/// Out-of-line implementation with no arguments is handy for gdb.
+void ScheduleDAG::viewGraph() {
+  viewGraph(getDAGName(), "Scheduling-Units Graph for " + getDAGName());
+}