From ecb8c2ba6029f02b01b20b110cc1b3b3ea2e1f1c Mon Sep 17 00:00:00 2001
From: Andrew Trick <atrick@apple.com>
Date: Wed, 13 Feb 2013 19:22:27 +0000
Subject: [PATCH] MIsched: HazardRecognizers are created for each DAG. Free
 them.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175067 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/MachineScheduler.cpp               | 7 ++++++-
 lib/Target/Hexagon/HexagonMachineScheduler.cpp | 4 +++-
 2 files changed, 9 insertions(+), 2 deletions(-)

diff --git a/lib/CodeGen/MachineScheduler.cpp b/lib/CodeGen/MachineScheduler.cpp
index 513d8a92689..ddaf56627bb 100644
--- a/lib/CodeGen/MachineScheduler.cpp
+++ b/lib/CodeGen/MachineScheduler.cpp
@@ -1054,6 +1054,9 @@ public:
 #endif
 
     void reset() {
+      // A new HazardRec is created for each DAG and owned by SchedBoundary.
+      delete HazardRec;
+
       Available.clear();
       Pending.clear();
       CheckPending = false;
@@ -1079,7 +1082,8 @@ public:
     /// PendingFlag set.
     SchedBoundary(unsigned ID, const Twine &Name):
       DAG(0), SchedModel(0), Rem(0), Available(ID, Name+".A"),
-      Pending(ID << ConvergingScheduler::LogMaxQID, Name+".P") {
+      Pending(ID << ConvergingScheduler::LogMaxQID, Name+".P"),
+      HazardRec(0) {
       reset();
     }
 
@@ -1223,6 +1227,7 @@ void ConvergingScheduler::initialize(ScheduleDAGMI *dag) {
   DAG = dag;
   SchedModel = DAG->getSchedModel();
   TRI = DAG->TRI;
+
   Rem.init(DAG, SchedModel);
   Top.init(DAG, SchedModel, &Rem);
   Bot.init(DAG, SchedModel, &Rem);
diff --git a/lib/Target/Hexagon/HexagonMachineScheduler.cpp b/lib/Target/Hexagon/HexagonMachineScheduler.cpp
index 36dfaa4233f..ced17b3c0a4 100644
--- a/lib/Target/Hexagon/HexagonMachineScheduler.cpp
+++ b/lib/Target/Hexagon/HexagonMachineScheduler.cpp
@@ -192,6 +192,7 @@ void ConvergingVLIWScheduler::initialize(ScheduleDAGMI *dag) {
   DAG = static_cast<VLIWMachineScheduler*>(dag);
   SchedModel = DAG->getSchedModel();
   TRI = DAG->TRI;
+
   Top.init(DAG, SchedModel);
   Bot.init(DAG, SchedModel);
 
@@ -199,6 +200,8 @@ void ConvergingVLIWScheduler::initialize(ScheduleDAGMI *dag) {
   // are disabled, then these HazardRecs will be disabled.
   const InstrItineraryData *Itin = DAG->getSchedModel()->getInstrItineraries();
   const TargetMachine &TM = DAG->MF.getTarget();
+  delete Top.HazardRec;
+  delete Bot.HazardRec;
   Top.HazardRec = TM.getInstrInfo()->CreateTargetMIHazardRecognizer(Itin, DAG);
   Bot.HazardRec = TM.getInstrInfo()->CreateTargetMIHazardRecognizer(Itin, DAG);
 
@@ -683,4 +686,3 @@ void ConvergingVLIWScheduler::schedNode(SUnit *SU, bool IsTopNode) {
     Bot.bumpNode(SU);
   }
 }
-
-- 
2.11.0