ScheduleDAG: colorize the DOT graph and improve formatting.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@173431 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 10 insertions, 2 deletions

diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp
index 8f7c5fd022..d8b5fd4ea3 100644
--- a/lib/CodeGen/MachineInstr.cpp
+++ b/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/lib/CodeGen/ScheduleDAGInstrs.cpp b/lib/CodeGen/ScheduleDAGInstrs.cpp
index f27b970aff..59e1ca17f6 100644
--- a/lib/CodeGen/ScheduleDAGInstrs.cpp
+++ b/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/lib/CodeGen/ScheduleDAGPrinter.cpp b/lib/CodeGen/ScheduleDAGPrinter.cpp
index 6c5091394d..8ddb3e892f 100644
--- a/lib/CodeGen/ScheduleDAGPrinter.cpp
+++ b/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;