From c90ae265e97b798a9f2bd706e981efe8134219c8 Mon Sep 17 00:00:00 2001
From: QingShan Zhang <qshanz@cn.ibm.com>
Date: Thu, 4 Jul 2019 07:43:51 +0000
Subject: [PATCH] [NFC][PowerPC] Make the PowerPC scheduling strategy feature
 only control the strategy instead of the scheduler.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@365110 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/PowerPC/PPCTargetMachine.cpp | 20 ++++++++++----------
 1 file changed, 10 insertions(+), 10 deletions(-)

diff --git a/lib/Target/PowerPC/PPCTargetMachine.cpp b/lib/Target/PowerPC/PPCTargetMachine.cpp
index fcaf7d6e3ee..ce00f848dd7 100644
--- a/lib/Target/PowerPC/PPCTargetMachine.cpp
+++ b/lib/Target/PowerPC/PPCTargetMachine.cpp
@@ -256,8 +256,11 @@ static CodeModel::Model getEffectivePPCCodeModel(const Triple &TT,
 
 
 static ScheduleDAGInstrs *createPPCMachineScheduler(MachineSchedContext *C) {
+  const PPCSubtarget &ST = C->MF->getSubtarget<PPCSubtarget>();
   ScheduleDAGMILive *DAG =
-    new ScheduleDAGMILive(C, llvm::make_unique<PPCPreRASchedStrategy>(C));
+    new ScheduleDAGMILive(C, ST.usePPCPreRASchedStrategy() ?
+                          llvm::make_unique<PPCPreRASchedStrategy>(C) :
+                          llvm::make_unique<GenericScheduler>(C));
   // add DAG Mutations here.
   DAG->addMutation(createCopyConstrainDAGMutation(DAG->TII, DAG->TRI));
   return DAG;
@@ -265,8 +268,11 @@ static ScheduleDAGInstrs *createPPCMachineScheduler(MachineSchedContext *C) {
 
 static ScheduleDAGInstrs *createPPCPostMachineScheduler(
   MachineSchedContext *C) {
+  const PPCSubtarget &ST = C->MF->getSubtarget<PPCSubtarget>();
   ScheduleDAGMI *DAG =
-    new ScheduleDAGMI(C, llvm::make_unique<PPCPostRASchedStrategy>(C), true);
+    new ScheduleDAGMI(C, ST.usePPCPostRASchedStrategy() ?
+                      llvm::make_unique<PPCPostRASchedStrategy>(C) :
+                      llvm::make_unique<PostGenericScheduler>(C), true);
   // add DAG Mutations here.
   return DAG;
 }
@@ -366,17 +372,11 @@ public:
   void addPreEmitPass() override;
   ScheduleDAGInstrs *
   createMachineScheduler(MachineSchedContext *C) const override {
-    const PPCSubtarget &ST = C->MF->getSubtarget<PPCSubtarget>();
-    if (ST.usePPCPreRASchedStrategy())
-      return createPPCMachineScheduler(C);
-    return nullptr;
+    return createPPCMachineScheduler(C);
   }
   ScheduleDAGInstrs *
   createPostMachineScheduler(MachineSchedContext *C) const override {
-    const PPCSubtarget &ST = C->MF->getSubtarget<PPCSubtarget>();
-    if (ST.usePPCPostRASchedStrategy())
-      return createPPCPostMachineScheduler(C);
-    return nullptr;
+    return createPPCPostMachineScheduler(C);
   }
 };
 
-- 
2.50.1