1 files changed, 43 insertions, 0 deletions
diff --git a/backend/include/rcc/CodeGen/TargetMemoryFolding.h b/backend/include/rcc/CodeGen/TargetMemoryFolding.h
new file mode 100644
index 0000000..e40fbc0
--- /dev/null
+++ b/backend/include/rcc/CodeGen/TargetMemoryFolding.h
@@ -0,0 +1,43 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_CODEGEN_TARGETMEMORYFOLDING_H
+#define RCC_CODEGEN_TARGETMEMORYFOLDING_H
+
+#include "rcc/CodeGen/MachineMemOperand.h"
+#include "rcc/Support/Error.h"
+
+#include <cstddef>
+#include <optional>
+
+namespace rcc {
+
+class MachineFunction;
+class MachineInstr;
+class TargetDescription;
+
+class TargetMemoryFoldingInfo {
+public:
+  virtual ~TargetMemoryFoldingInfo() = default;
+
+  [[nodiscard]] virtual Expected<bool>
+  canFoldMemoryOperand(const MachineInstr &Consumer, std::size_t OperandIndex,
+                       const MachineInstr &MemoryInstruction, const MachineFunction &Function,
+                       const TargetDescription &Target) const = 0;
+
+  [[nodiscard]] virtual Expected<MachineInstr *>
+  foldMemoryOperand(MachineInstr &Consumer, std::size_t OperandIndex,
+                    MachineInstr &MemoryInstruction, MachineFunction &Function,
+                    const TargetDescription &Target) const = 0;
+
+  [[nodiscard]] virtual Expected<bool>
+  unfoldMemoryOperand(MachineInstr &Instruction, MachineFunction &Function,
+                      const TargetDescription &Target) const = 0;
+
+  [[nodiscard]] virtual Expected<std::optional<MemorySize>>
+  getFoldedMemorySize(const MachineInstr &Instruction, const MachineFunction &Function,
+                      const TargetDescription &Target) const = 0;
+};
+
+} // namespace rcc
+
+#endif // RCC_CODEGEN_TARGETMEMORYFOLDING_H