[Tooling] Complete the LLVM MIR command-line contract

1 files changed, 72 insertions, 0 deletions

diff --git a/backend/include/rcc/CodeGen/CommandFlags.h b/backend/include/rcc/CodeGen/CommandFlags.h
new file mode 100644
index 0000000..0ee2f0d
--- /dev/null
+++ b/backend/include/rcc/CodeGen/CommandFlags.h
@@ -0,0 +1,72 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_CODEGEN_COMMANDFLAGS_H
+#define RCC_CODEGEN_COMMANDFLAGS_H
+
+#include "rcc/Support/Error.h"
+
+#include <cstddef>
+#include <cstdint>
+#include <optional>
+#include <span>
+#include <string>
+#include <string_view>
+#include <vector>
+
+namespace rcc {
+
+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 CodeGenFileType : std::uint8_t {
+  AssemblyFile,
+  ObjectFile,
+  Null,
+};
+
+struct CodeGenCommandFlags final {
+  std::optional<std::string> Triple;
+  std::optional<std::string> CPU;
+  std::optional<std::string> TuneCPU;
+  std::optional<std::string> ABI;
+  std::vector<std::string> FeatureOverrides;
+  std::optional<RelocationModel> Relocation;
+  std::optional<CodeModel> Code;
+  std::optional<OptimizationLevel> Optimization;
+  CodeGenFileType FileType = CodeGenFileType::AssemblyFile;
+  bool FileTypeWasSpecified = false;
+};
+
+[[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(CodeGenFileType 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<CodeGenFileType> parseCodeGenFileType(std::string_view Value);
+[[nodiscard]] Expected<bool> parseCodeGenCommandFlag(std::span<const std::string_view> Arguments,
+                                                     std::size_t &Index,
+                                                     CodeGenCommandFlags &Flags);
+
+} // namespace rcc
+
+#endif // RCC_CODEGEN_COMMANDFLAGS_H