ScheduleDAG: colorize the DOT graph and improve formatting.

llvm-svn: 173431

4 files changed, 21 insertions, 2 deletions

diff --git a/llvm/lib/CodeGen/MachineInstr.cpp b/llvm/lib/CodeGen/MachineInstr.cpp
index 8f7c5fd0224..d8b5fd4ea3d 100644
--- a/llvm/lib/CodeGen/MachineInstr.cpp
+++ b/llvm/lib/CodeGen/MachineInstr.cpp
@@ -1428,7 +1428,8 @@ static void printDebugLoc(DebugLoc DL, const MachineFunction *MF,
   }
 }
 
-void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM) const {
+void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM,
+                         bool SkipOpers) const {
   // We can be a bit tidier if we know the TargetMachine and/or MachineFunction.
   const MachineFunction *MF = 0;
   const MachineRegisterInfo *MRI = 0;
@@ -1465,6 +1466,9 @@ void MachineInstr::print(raw_ostream &OS, const TargetMachine *TM) const {
   else
     OS << "UNKNOWN";
 
+  if (SkipOpers)
+    return;
+
   // Print the rest of the operands.
   bool OmittedAnyCallClobbers = false;
   bool FirstOp = true;
diff --git a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
index f27b970aff1..59e1ca17f67 100644
--- a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
+++ b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -994,7 +994,7 @@ std::string ScheduleDAGInstrs::getGraphNodeLabel(const SUnit *SU) const {
   else if (SU == &ExitSU)
     oss << "<exit>";
   else
-    SU->getInstr()->print(oss);
+    SU->getInstr()->print(oss, &TM, /*SkipOpers=*/true);
   return oss.str();
 }
 
diff --git a/llvm/lib/CodeGen/ScheduleDAGPrinter.cpp b/llvm/lib/CodeGen/ScheduleDAGPrinter.cpp
index 6c5091394d0..8ddb3e892f2 100644
--- a/llvm/lib/CodeGen/ScheduleDAGPrinter.cpp
+++ b/llvm/lib/CodeGen/ScheduleDAGPrinter.cpp
@@ -41,6 +41,10 @@ namespace llvm {
       return true;
     }
 
+    static bool isNodeHidden(const SUnit *Node) {
+      return (Node->NumPreds > 10 || Node->NumSuccs > 10);
+    }
+
     static bool hasNodeAddressLabel(const SUnit *Node,
                                     const ScheduleDAG *Graph) {
       return true;
diff --git a/llvm/lib/Support/GraphWriter.cpp b/llvm/lib/Support/GraphWriter.cpp
index 669c238da96..bff182f30e3 100644
--- a/llvm/lib/Support/GraphWriter.cpp
+++ b/llvm/lib/Support/GraphWriter.cpp
@@ -53,6 +53,17 @@ std::string llvm::DOT::EscapeString(const std::string &Label) {
   return Str;
 }
 
+/// \brief Get a color string for this node number. Simply round-robin selects
+/// from a reasonable number of colors.
+StringRef llvm::DOT::getColorString(unsigned ColorNumber) {
+  static const int NumColors = 20;
+  static const char* Colors[NumColors] = {
+    "aaaaaa", "aa0000", "00aa00", "aa5500", "0055ff", "aa00aa", "00aaaa",
+    "555555", "ff5555", "55ff55", "ffff55", "5555ff", "ff55ff", "55ffff",
+    "ffaaaa", "aaffaa", "ffffaa", "aaaaff", "ffaaff", "aaffff"};
+  return Colors[ColorNumber % NumColors];
+}
+
 // Execute the graph viewer. Return true if successful.
 static bool LLVM_ATTRIBUTE_UNUSED
 ExecGraphViewer(const sys::Path &ExecPath, std::vector<const char*> &args,