From: Andrew Trick <atrick@apple.com>
Date: Wed, 7 Mar 2012 00:18:25 +0000 (+0000)
Subject: Added -view-misched=dags options.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0df7f8821cc3ce26843b4fb63456cb4ccb7e4153;p=oota-llvm.git

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 55b931ff80f..5d7dee8e1ee 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 @@ void ScheduleTopDownLive::Schedule() {
   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);