[llvm] [AMDGPU] Add scaffolding for ML focused scheduling strategy (PR #169616)

[Shilei Tian via llvm-commits]

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@@ -0,0 +1,43 @@
+//===-- AMDGPUMLSchedStrategy.h - ML-focused Scheduler Strategy -*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+/// \file
+/// ML-focused scheduling strategy for AMDGPU.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_LIB_TARGET_AMDGPU_AMDGPUMLSCHEDSTRATEGY_H
+#define LLVM_LIB_TARGET_AMDGPU_AMDGPUMLSCHEDSTRATEGY_H
+
+#include "GCNSchedStrategy.h"
+#include "llvm/CodeGen/MachineScheduler.h"
+
+namespace llvm {
+
+class AMDGPUMLSchedStrategy final : public GCNSchedStrategy {
+protected:
+  bool tryCandidate(SchedCandidate &Cand, SchedCandidate &TryCand,
+                    SchedBoundary *Zone) const override;
+
+public:
+  AMDGPUMLSchedStrategy(const MachineSchedContext *C);
+
+  void initialize(ScheduleDAGMI *DAG) override;
+};
+
+class AMDGPUMLPostSchedStrategy : public PostGenericScheduler {
+protected:
+  bool tryCandidate(SchedCandidate &Cand, SchedCandidate &TryCand) override;
+
+public:
+  AMDGPUMLPostSchedStrategy(const MachineSchedContext *C);
+};
+
+} // End namespace llvm
+
+#endif // LLVM_LIB_TARGET_AMDGPU_AMDGPUMLSCHEDSTRATEGY_H
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shiltian wrote:

missing empty line at EoF

https://github.com/llvm/llvm-project/pull/169616