1 files changed, 58 insertions, 0 deletions
diff --git a/llvm/include/llvm/CodeGen/MachineSSAContext.h b/llvm/include/llvm/CodeGen/MachineSSAContext.h
new file mode 100644
index 000000000000..6dbf321bdeaa
--- /dev/null
+++ b/llvm/include/llvm/CodeGen/MachineSSAContext.h
@@ -0,0 +1,58 @@
+//===- MachineSSAContext.h --------------------------------------*- 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
+///
+/// This file declares a specialization of the GenericSSAContext<X>
+/// template class for Machine IR.
+///
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CODEGEN_MACHINESSACONTEXT_H
+#define LLVM_CODEGEN_MACHINESSACONTEXT_H
+
+#include "llvm/ADT/GenericSSAContext.h"
+#include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/Support/Printable.h"
+
+#include <memory>
+
+namespace llvm {
+class MachineInstr;
+class MachineBasicBlock;
+class MachineFunction;
+class Register;
+template <typename, bool> class DominatorTreeBase;
+
+inline auto successors(MachineBasicBlock *BB) { return BB->successors(); }
+inline auto predecessors(MachineBasicBlock *BB) { return BB->predecessors(); }
+
+template <> class GenericSSAContext<MachineFunction> {
+  const MachineRegisterInfo *RegInfo = nullptr;
+  MachineFunction *MF;
+
+public:
+  using BlockT = MachineBasicBlock;
+  using FunctionT = MachineFunction;
+  using InstructionT = MachineInstr;
+  using ValueRefT = Register;
+  using DominatorTreeT = DominatorTreeBase<BlockT, false>;
+
+  static MachineBasicBlock *getEntryBlock(MachineFunction &F);
+
+  void setFunction(MachineFunction &Fn);
+  MachineFunction *getFunction() const { return MF; }
+
+  Printable print(MachineBasicBlock *Block) const;
+  Printable print(MachineInstr *Inst) const;
+  Printable print(Register Value) const;
+};
+
+using MachineSSAContext = GenericSSAContext<MachineFunction>;
+} // namespace llvm
+
+#endif // LLVM_CODEGEN_MACHINESSACONTEXT_H