From d62f022c92fcc3ebe2269273628943a0089683fd Mon Sep 17 00:00:00 2001
From: Richard-Qin-X <richard.qin.001@gmail.com>
Date: Thu, 13 Aug 2026 06:19:30 +0800
Subject: [CodeGen] Align MIR parser and printer ownership

---
 backend/include/rcc/MIR/MILexer.h | 181 --------------------------------------
 1 file changed, 181 deletions(-)
 delete mode 100644 backend/include/rcc/MIR/MILexer.h

(limited to 'backend/include/rcc/MIR/MILexer.h')

diff --git a/backend/include/rcc/MIR/MILexer.h b/backend/include/rcc/MIR/MILexer.h
deleted file mode 100644
index f54f255..0000000
--- a/backend/include/rcc/MIR/MILexer.h
+++ /dev/null
@@ -1,181 +0,0 @@
-// SPDX-License-Identifier: GPL-3.0-or-later
-
-#ifndef RCC_MIR_MILEXER_H
-#define RCC_MIR_MILEXER_H
-
-#include "rcc/Support/TextDiagnostic.h"
-
-#include <cstddef>
-#include <cstdint>
-#include <memory>
-#include <span>
-#include <string>
-#include <string_view>
-#include <utility>
-#include <variant>
-
-namespace rcc::mir {
-
-enum class MITokenKind : std::uint8_t {
-  EndOfFile,
-  Error,
-  Newline,
-
-  Comma,
-  Equal,
-  Underscore,
-  Colon,
-  DoubleColon,
-  Dot,
-  Exclaim,
-  LeftParen,
-  RightParen,
-  LeftBrace,
-  RightBrace,
-  Plus,
-  Minus,
-  Less,
-  Greater,
-
-  Keyword,
-  MetadataKeyword,
-  Identifier,
-  NamedRegister,
-  NamedVirtualRegister,
-  MachineBasicBlockLabel,
-  MachineBasicBlock,
-  StackObject,
-  FixedStackObject,
-  NamedGlobalValue,
-  GlobalValue,
-  ExternalSymbol,
-  MCSymbol,
-  IntegerLiteral,
-  FloatingPointLiteral,
-  HexLiteral,
-  VirtualRegister,
-  ConstantPoolItem,
-  JumpTableIndex,
-  NamedIRBlock,
-  IRBlock,
-  NamedIRValue,
-  IRValue,
-  QuotedIRValue,
-  SubRegisterIndex,
-  StringConstant,
-};
-
-[[nodiscard]] std::string_view getMITokenKindName(MITokenKind Kind) noexcept;
-[[nodiscard]] bool isMIKeyword(std::string_view Spelling) noexcept;
-[[nodiscard]] bool isMIMetadataKeyword(std::string_view Spelling) noexcept;
-
-class MIToken final {
-public:
-  [[nodiscard]] MITokenKind kind() const noexcept {
-    return Kind;
-  }
-
-  [[nodiscard]] const TextRange &range() const noexcept {
-    return Range;
-  }
-
-  [[nodiscard]] std::string_view spelling() const noexcept {
-    return Spelling;
-  }
-
-  [[nodiscard]] bool hasStringValue() const noexcept {
-    return !std::holds_alternative<std::monostate>(StringValue);
-  }
-
-  [[nodiscard]] std::string_view stringValue() const noexcept;
-
-  [[nodiscard]] bool hasIntegerValue() const noexcept {
-    return !IntegerValue.empty();
-  }
-
-  [[nodiscard]] std::string_view integerValue() const noexcept {
-    return IntegerValue;
-  }
-
-  [[nodiscard]] bool is(MITokenKind Expected) const noexcept {
-    return Kind == Expected;
-  }
-
-  [[nodiscard]] bool isKeyword(std::string_view Expected) const noexcept {
-    return Kind == MITokenKind::Keyword && stringValue() == Expected;
-  }
-
-  [[nodiscard]] bool isMetadataKeyword(std::string_view Expected) const noexcept {
-    return Kind == MITokenKind::MetadataKeyword && stringValue() == Expected;
-  }
-
-  [[nodiscard]] bool isNewlineOrEnd() const noexcept {
-    return Kind == MITokenKind::Newline || Kind == MITokenKind::EndOfFile;
-  }
-
-  [[nodiscard]] bool isErrorOrEnd() const noexcept {
-    return Kind == MITokenKind::Error || Kind == MITokenKind::EndOfFile;
-  }
-
-  [[nodiscard]] bool isRegister() const noexcept;
-  [[nodiscard]] bool isRegisterFlag() const noexcept;
-  [[nodiscard]] bool isMemoryOperandFlag() const noexcept;
-
-private:
-  using StringValueStorage = std::variant<std::monostate, std::string_view, std::string>;
-
-  MIToken(MITokenKind Kind, TextRange Range, std::string_view Spelling,
-          StringValueStorage StringValue = {}, std::string_view IntegerValue = {})
-      : Kind(Kind), Range(Range), Spelling(Spelling), StringValue(std::move(StringValue)),
-        IntegerValue(IntegerValue) {}
-
-  MITokenKind Kind = MITokenKind::Error;
-  TextRange Range;
-  std::string_view Spelling;
-  StringValueStorage StringValue;
-  std::string_view IntegerValue;
-
-  friend class MILexer;
-};
-
-struct MILexerOptions final {
-  std::size_t MaximumTokenLength = std::size_t{1} << 24U;
-  std::size_t MaximumTokens = std::size_t{1} << 24U;
-};
-
-class MILexer final {
-public:
-  MILexer(std::string SourceName, std::string SourceText, MILexerOptions Options = {});
-  MILexer(const MILexer &) = delete;
-  MILexer &operator=(const MILexer &) = delete;
-  MILexer(MILexer &&) noexcept;
-  MILexer &operator=(MILexer &&) noexcept;
-  ~MILexer();
-
-  [[nodiscard]] MIToken next();
-
-  [[nodiscard]] const TextSource &source() const noexcept;
-  [[nodiscard]] std::span<const TextDiagnostic> diagnostics() const noexcept;
-  [[nodiscard]] bool failed() const noexcept;
-  [[nodiscard]] std::size_t tokenCount() const noexcept;
-
-private:
-  [[nodiscard]] static MIToken makeToken(MITokenKind Kind, TextRange Range,
-                                         std::string_view Spelling,
-                                         std::string_view IntegerValue = {});
-  [[nodiscard]] static MIToken makeStringToken(MITokenKind Kind, TextRange Range,
-                                               std::string_view Spelling,
-                                               std::string_view StringValue,
-                                               std::string_view IntegerValue = {});
-  [[nodiscard]] static MIToken makeOwnedStringToken(MITokenKind Kind, TextRange Range,
-                                                    std::string_view Spelling,
-                                                    std::string StringValue,
-                                                    std::string_view IntegerValue = {});
-
-  class Impl;
-  std::unique_ptr<Impl> Implementation;
-};
-
-} // namespace rcc::mir
-
-#endif // RCC_MIR_MILEXER_H
-- 
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