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-rw-r--r--llvm/lib/CodeGen/MachineScheduler.cpp7
1 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/MachineScheduler.cpp b/llvm/lib/CodeGen/MachineScheduler.cpp
index da01f6f5bbe..d60f17ad07f 100644
--- a/llvm/lib/CodeGen/MachineScheduler.cpp
+++ b/llvm/lib/CodeGen/MachineScheduler.cpp
@@ -100,8 +100,11 @@ static cl::opt<std::string> SchedOnlyFunc("misched-only-func", cl::Hidden,
cl::desc("Only schedule this function"));
static cl::opt<unsigned> SchedOnlyBlock("misched-only-block", cl::Hidden,
cl::desc("Only schedule this MBB#"));
+static cl::opt<bool> PrintDAGs("misched-print-dags", cl::Hidden,
+ cl::desc("Print schedule DAGs"));
#else
-static bool ViewMISchedDAGs = false;
+static const bool ViewMISchedDAGs = false;
+static const bool PrintDAGs = false;
#endif // NDEBUG
/// Avoid quadratic complexity in unusually large basic blocks by limiting the
@@ -765,6 +768,7 @@ void ScheduleDAGMI::schedule() {
findRootsAndBiasEdges(TopRoots, BotRoots);
LLVM_DEBUG(dump());
+ if (PrintDAGs) dump();
if (ViewMISchedDAGs) viewGraph();
// Initialize the strategy before modifying the DAG.
@@ -1218,6 +1222,7 @@ void ScheduleDAGMILive::schedule() {
SchedImpl->initialize(this);
LLVM_DEBUG(dump());
+ if (PrintDAGs) dump();
if (ViewMISchedDAGs) viewGraph();
// Initialize ready queues now that the DAG and priority data are finalized.
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