From: Javed Absar <javed.absar@arm.com>
Date: Fri, 9 Jun 2017 14:07:21 +0000 (+0000)
Subject: [ARM] Custom machine-scheduler. NFCI.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=1ad151d432791b2ab8d7f4c0b096ca735708c0c1;p=llvm

[ARM] Custom machine-scheduler. NFCI.

This patch creates a customised machine-scheduler for ARM targets,
so that subsequently DAG mutations etc can be added.
Reviewed by: hahn, rengolin, rovka.
Differential Revision: https://reviews.llvm.org/D34039



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@305078 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/ARMTargetMachine.cpp b/lib/Target/ARM/ARMTargetMachine.cpp
index f5e4043882f..c0506cfda61 100644
--- a/lib/Target/ARM/ARMTargetMachine.cpp
+++ b/lib/Target/ARM/ARMTargetMachine.cpp
@@ -37,6 +37,7 @@
 #include "llvm/CodeGen/GlobalISel/RegBankSelect.h"
 #include "llvm/CodeGen/GlobalISel/RegisterBankInfo.h"
 #include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineScheduler.h"
 #include "llvm/CodeGen/Passes.h"
 #include "llvm/CodeGen/TargetPassConfig.h"
 #include "llvm/IR/Attributes.h"
@@ -389,6 +390,20 @@ public:
     return getTM<ARMBaseTargetMachine>();
   }
 
+  ScheduleDAGInstrs *
+  createMachineScheduler(MachineSchedContext *C) const override {
+    ScheduleDAGMILive *DAG = createGenericSchedLive(C);
+    // add DAG Mutations here.
+    return DAG;
+  }
+
+  ScheduleDAGInstrs *
+  createPostMachineScheduler(MachineSchedContext *C) const override {
+    ScheduleDAGMI *DAG = createGenericSchedPostRA(C);
+    // add DAG Mutations here.
+    return DAG;
+  }
+
   void addIRPasses() override;
   bool addPreISel() override;
   bool addInstSelector() override;