ScheduleDAG: colorize the DOT graph and improve formatting.

llvm-svn: 173431
diff --git a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
index f27b970..59e1ca1 100644
--- a/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
+++ b/llvm/lib/CodeGen/ScheduleDAGInstrs.cpp
@@ -994,7 +994,7 @@
   else if (SU == &ExitSU)
     oss << "<exit>";
   else
-    SU->getInstr()->print(oss);
+    SU->getInstr()->print(oss, &TM, /*SkipOpers=*/true);
   return oss.str();
 }