From adcf8c9b1bd1b47e00bf859693112cea1f7e8c9f Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Mon, 10 Aug 2026 20:36:50 +0800
Subject: [Tooling] Complete backend tooling and validation

---
 backend/include/rcc/Tooling/BackendInvocation.h | 119 ++++++++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 backend/include/rcc/Tooling/BackendInvocation.h

(limited to 'backend/include/rcc/Tooling/BackendInvocation.h')

diff --git a/backend/include/rcc/Tooling/BackendInvocation.h b/backend/include/rcc/Tooling/BackendInvocation.h
new file mode 100644
index 0000000..db1c5d2
--- /dev/null
+++ b/backend/include/rcc/Tooling/BackendInvocation.h
@@ -0,0 +1,119 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_TOOLING_BACKENDINVOCATION_H
+#define RCC_TOOLING_BACKENDINVOCATION_H
+
+#include "rcc/Support/Error.h"
+
+#include <cstdint>
+#include <optional>
+#include <span>
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace rcc {
+
+class TargetDescription;
+
+namespace tooling {
+
+inline constexpr std::uint32_t BackendInvocationSchemaVersion = 1;
+inline constexpr std::string_view LLVMReferenceRevision =
+    "2b40c303e79f64c5c7642032554eda026594d604";
+inline constexpr std::string_view GenericOpcodeReferenceVersion = "rcc-generic-opcode-v1";
+inline constexpr std::string_view RV64GCTargetABILoweringVersion = "rcc-rv64gc-lp64d-v1";
+inline constexpr std::string_view CompilerBuildFingerprint = "rcc-backend-0.1.0-stage17";
+
+enum class RelocationModel : std::uint8_t {
+  Static,
+  PositionIndependent,
+};
+
+enum class CodeModel : std::uint8_t {
+  Small,
+  Medium,
+  Large,
+};
+
+enum class OptimizationLevel : std::uint8_t {
+  O0,
+  O1,
+  O2,
+  O3,
+  Os,
+  Oz,
+};
+
+enum class LayoutOwnership : std::uint8_t {
+  NativeObject,
+  CompilerFinalLayout,
+  ExternalRelaxation,
+};
+
+struct BackendOption final {
+  std::string Name;
+  std::string Value;
+
+  friend bool operator==(const BackendOption &, const BackendOption &) = default;
+};
+
+struct DeterminismOptions final {
+  std::uint64_t RandomSeed = 0;
+  std::uint32_t ThreadCount = 1;
+  bool StableScheduling = true;
+
+  friend bool operator==(const DeterminismOptions &, const DeterminismOptions &) = default;
+};
+
+struct BackendInvocation final {
+  std::uint32_t SchemaVersion = BackendInvocationSchemaVersion;
+  std::string Triple;
+  std::string CPU;
+  std::string TuneCPU;
+  std::vector<std::string> Features;
+  std::string ABI;
+  std::string DataLayout;
+  RelocationModel Relocation = RelocationModel::PositionIndependent;
+  CodeModel Code = CodeModel::Small;
+  std::vector<BackendOption> TargetOptions;
+  LayoutOwnership Layout = LayoutOwnership::NativeObject;
+  std::string AssemblerFlavor;
+  std::string AssemblerVersion;
+  std::vector<BackendOption> AssemblerOptions;
+  OptimizationLevel Optimization = OptimizationLevel::O2;
+  std::vector<std::string> PassPipeline{"default"};
+  DeterminismOptions Determinism;
+  std::optional<std::uint64_t> ActionFuel;
+  std::vector<std::string> EnabledActions;
+  std::string MIRReferenceRevision{LLVMReferenceRevision};
+  std::string GenericOpcodeVersion{GenericOpcodeReferenceVersion};
+  std::string TargetABILoweringVersion{RV64GCTargetABILoweringVersion};
+  std::string BuildFingerprint{CompilerBuildFingerprint};
+
+  [[nodiscard]] Expected<void> canonicalizeAndVerify();
+  [[nodiscard]] std::string canonicalText() const;
+
+  friend bool operator==(const BackendInvocation &, const BackendInvocation &) = default;
+};
+
+[[nodiscard]] BackendInvocation defaultRV64GCInvocation();
+[[nodiscard]] Expected<std::string>
+computeTargetDescriptionFingerprint(const TargetDescription &Target);
+[[nodiscard]] Expected<std::string> computeCacheKey(std::string_view CanonicalMIR,
+                                                    const BackendInvocation &Invocation,
+                                                    std::string_view TargetFingerprint);
+
+[[nodiscard]] std::string_view spelling(RelocationModel Value) noexcept;
+[[nodiscard]] std::string_view spelling(CodeModel Value) noexcept;
+[[nodiscard]] std::string_view spelling(OptimizationLevel Value) noexcept;
+[[nodiscard]] std::string_view spelling(LayoutOwnership Value) noexcept;
+[[nodiscard]] Expected<RelocationModel> parseRelocationModel(std::string_view Value);
+[[nodiscard]] Expected<CodeModel> parseCodeModel(std::string_view Value);
+[[nodiscard]] Expected<OptimizationLevel> parseOptimizationLevel(std::string_view Value);
+[[nodiscard]] Expected<LayoutOwnership> parseLayoutOwnership(std::string_view Value);
+
+} // namespace tooling
+} // namespace rcc
+
+#endif // RCC_TOOLING_BACKENDINVOCATION_H
-- 
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