From 4fe5ee649927d54d6fb74904d7b97ad0f63fd587 Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Tue, 11 Aug 2026 17:38:11 +0800
Subject: [RISCV] Legalize fixed-baseline RV64 MachineIR

---
 .../include/rcc/Target/RISCV/RISCVFunctionInfo.h   | 63 ++++++++++++++++++++++
 1 file changed, 63 insertions(+)
 create mode 100644 backend/include/rcc/Target/RISCV/RISCVFunctionInfo.h

(limited to 'backend/include/rcc/Target/RISCV')

diff --git a/backend/include/rcc/Target/RISCV/RISCVFunctionInfo.h b/backend/include/rcc/Target/RISCV/RISCVFunctionInfo.h
new file mode 100644
index 0000000..2720830
--- /dev/null
+++ b/backend/include/rcc/Target/RISCV/RISCVFunctionInfo.h
@@ -0,0 +1,63 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_TARGET_RISCV_RISCVFUNCTIONINFO_H
+#define RCC_TARGET_RISCV_RISCVFUNCTIONINFO_H
+
+#include "rcc/CodeGen/TargetFunctionState.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <span>
+#include <string>
+#include <vector>
+
+namespace rcc {
+
+struct TargetMIRTextInfoDesc;
+
+namespace riscv {
+
+class RISCVFunctionInfo final {
+public:
+  RISCVFunctionInfo(std::int32_t VarArgsFrameIndex = 0,
+                    std::int32_t VarArgsSaveSize = 0) noexcept
+      : VarArgsFrameIndex(VarArgsFrameIndex), VarArgsSaveSize(VarArgsSaveSize) {}
+
+  [[nodiscard]] static constexpr TargetFunctionStateTypeID stableTypeID() noexcept {
+    return TargetFunctionStateTypeID::fromValue(0x5243435256460001ULL);
+  }
+
+  [[nodiscard]] static constexpr std::uint32_t schemaVersion() noexcept {
+    return 1;
+  }
+
+  [[nodiscard]] Expected<void> verify() const;
+  [[nodiscard]] Expected<RISCVFunctionInfo>
+  clone(const MachineFunctionCloneContext &Context) const;
+  [[nodiscard]] std::string print() const;
+  [[nodiscard]] Expected<std::vector<std::byte>> encode() const;
+  [[nodiscard]] static Expected<RISCVFunctionInfo>
+  decode(std::uint32_t Version, std::span<const std::byte> Payload);
+
+  [[nodiscard]] std::int32_t varArgsFrameIndex() const noexcept {
+    return VarArgsFrameIndex;
+  }
+
+  [[nodiscard]] std::int32_t varArgsSaveSize() const noexcept {
+    return VarArgsSaveSize;
+  }
+
+  friend bool operator==(const RISCVFunctionInfo &Left,
+                         const RISCVFunctionInfo &Right) = default;
+
+private:
+  std::int32_t VarArgsFrameIndex = 0;
+  std::int32_t VarArgsSaveSize = 0;
+};
+
+void configureFunctionInfoMIRSchema(TargetMIRTextInfoDesc &Description);
+
+} // namespace riscv
+} // namespace rcc
+
+#endif // RCC_TARGET_RISCV_RISCVFUNCTIONINFO_H
-- 
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