Added -view-misched=dags options.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152178 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index 55b931f..5d7dee8 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -30,6 +30,13 @@
using namespace llvm;
+#ifndef NDEBUG
+static cl::opt<bool> ViewMISchedDAGs("view-misched-dags", cl::Hidden,
+ cl::desc("Pop up a window to show MISched dags after they are processed"));
+#else
+static bool ViewMISchedDAGs = false;
+#endif // NDEBUG
+
//===----------------------------------------------------------------------===//
// Machine Instruction Scheduling Pass and Registry
//===----------------------------------------------------------------------===//
@@ -205,6 +212,8 @@
DEBUG(for (unsigned su = 0, e = SUnits.size(); su != e; ++su)
SUnits[su].dumpAll(this));
+ if (ViewMISchedDAGs) viewGraph();
+
// Release any successors of the special Entry node. It is currently unused,
// but we keep up appearances.
releaseSuccessors(&EntrySU);