1 files changed, 208 insertions, 0 deletions
diff --git a/backend/include/rcc/CodeGen/MachineBasicBlockAttributes.h b/backend/include/rcc/CodeGen/MachineBasicBlockAttributes.h
new file mode 100644
index 0000000..7b132d2
--- /dev/null
+++ b/backend/include/rcc/CodeGen/MachineBasicBlockAttributes.h
@@ -0,0 +1,208 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_CODEGEN_MACHINEBASICBLOCKATTRIBUTES_H
+#define RCC_CODEGEN_MACHINEBASICBLOCKATTRIBUTES_H
+
+#include "rcc/CodeGen/MachineIRTypes.h"
+#include "rcc/Support/Error.h"
+
+#include <cstdint>
+#include <optional>
+#include <string>
+#include <string_view>
+
+namespace rcc {
+
+enum class MachineBasicBlockAttribute : std::uint8_t {
+  MachineBlockAddressTaken,
+  IRBlockAddressTaken,
+  LandingPad,
+  InlineAsmBrIndirectTarget,
+  EHFuncletEntry,
+  EHScopeEntry,
+  Count,
+};
+
+[[nodiscard]] std::string_view
+getMachineBasicBlockAttributeName(MachineBasicBlockAttribute Attribute) noexcept;
+
+enum class MachineBasicBlockSectionKind : std::uint8_t {
+  Numbered,
+  Exception,
+  Cold,
+};
+
+class MachineBasicBlockSectionID final {
+public:
+  constexpr MachineBasicBlockSectionID() noexcept = default;
+
+  [[nodiscard]] static constexpr MachineBasicBlockSectionID
+  numbered(std::uint32_t Number) noexcept {
+    return MachineBasicBlockSectionID(MachineBasicBlockSectionKind::Numbered, Number);
+  }
+
+  [[nodiscard]] static constexpr MachineBasicBlockSectionID exception() noexcept {
+    return MachineBasicBlockSectionID(MachineBasicBlockSectionKind::Exception, 0);
+  }
+
+  [[nodiscard]] static constexpr MachineBasicBlockSectionID cold() noexcept {
+    return MachineBasicBlockSectionID(MachineBasicBlockSectionKind::Cold, 0);
+  }
+
+  [[nodiscard]] constexpr MachineBasicBlockSectionKind kind() const noexcept {
+    return Kind;
+  }
+
+  [[nodiscard]] constexpr std::uint32_t number() const noexcept {
+    return Number;
+  }
+
+  [[nodiscard]] constexpr bool isDefault() const noexcept {
+    return Kind == MachineBasicBlockSectionKind::Numbered && Number == 0;
+  }
+
+  friend constexpr bool operator==(MachineBasicBlockSectionID Left,
+                                   MachineBasicBlockSectionID Right) noexcept = default;
+
+private:
+  constexpr MachineBasicBlockSectionID(MachineBasicBlockSectionKind Kind,
+                                       std::uint32_t Number) noexcept
+      : Kind(Kind), Number(Number) {}
+
+  MachineBasicBlockSectionKind Kind = MachineBasicBlockSectionKind::Numbered;
+  std::uint32_t Number = 0;
+};
+
+struct MachineBasicBlockProfileID final {
+  std::uint32_t BaseID = 0;
+  std::uint32_t CloneID = 0;
+
+  friend constexpr bool operator==(MachineBasicBlockProfileID Left,
+                                   MachineBasicBlockProfileID Right) noexcept = default;
+};
+
+class MachineBasicBlockAttributes final {
+public:
+  MachineBasicBlockAttributes() = default;
+
+  [[nodiscard]] static Expected<MachineBasicBlockAttributes> fromRawFlags(std::uint8_t RawFlags);
+
+  [[nodiscard]] bool has(MachineBasicBlockAttribute Attribute) const noexcept {
+    if (!isValidAttribute(Attribute))
+      return false;
+    return (Flags & flagFor(Attribute)) != 0;
+  }
+
+  void set(MachineBasicBlockAttribute Attribute) noexcept {
+    if (isValidAttribute(Attribute))
+      Flags |= flagFor(Attribute);
+  }
+
+  void clear(MachineBasicBlockAttribute Attribute) noexcept {
+    if (isValidAttribute(Attribute))
+      Flags &= static_cast<std::uint8_t>(~flagFor(Attribute));
+  }
+
+  [[nodiscard]] std::uint8_t rawFlags() const noexcept {
+    return Flags;
+  }
+
+  [[nodiscard]] std::optional<std::string_view> name() const noexcept {
+    if (!Name)
+      return std::nullopt;
+    return *Name;
+  }
+
+  [[nodiscard]] Expected<void> setName(std::string NewName);
+
+  void clearName() noexcept {
+    Name.reset();
+  }
+
+  [[nodiscard]] std::optional<std::string_view> irBlockName() const noexcept {
+    if (!IRBlockName)
+      return std::nullopt;
+    return *IRBlockName;
+  }
+
+  [[nodiscard]] Expected<void> setIRBlockName(std::string NewName);
+
+  void clearIRBlockName() noexcept {
+    IRBlockName.reset();
+  }
+
+  [[nodiscard]] Alignment alignment() const noexcept {
+    return BlockAlignment;
+  }
+
+  void setAlignment(Alignment NewAlignment) noexcept {
+    BlockAlignment = NewAlignment;
+  }
+
+  void clearAlignment() noexcept {
+    BlockAlignment = Alignment{};
+  }
+
+  [[nodiscard]] MachineBasicBlockSectionID sectionID() const noexcept {
+    return SectionID;
+  }
+
+  void setSectionID(MachineBasicBlockSectionID NewSectionID) noexcept {
+    SectionID = NewSectionID;
+  }
+
+  [[nodiscard]] const std::optional<MachineBasicBlockProfileID> &profileID() const noexcept {
+    return ProfileID;
+  }
+
+  void setProfileID(MachineBasicBlockProfileID NewProfileID) noexcept {
+    ProfileID = NewProfileID;
+  }
+
+  void clearProfileID() noexcept {
+    ProfileID.reset();
+  }
+
+  [[nodiscard]] std::uint32_t callFrameSize() const noexcept {
+    return CallFrameSize;
+  }
+
+  void setCallFrameSize(std::uint32_t Size) noexcept {
+    CallFrameSize = Size;
+  }
+
+  [[nodiscard]] Expected<void> verify() const;
+
+  friend bool operator==(const MachineBasicBlockAttributes &Left,
+                         const MachineBasicBlockAttributes &Right) = default;
+
+private:
+  static constexpr std::uint8_t AttributeCount =
+      static_cast<std::uint8_t>(MachineBasicBlockAttribute::Count);
+  static_assert(AttributeCount < 8);
+
+  static constexpr std::uint8_t ValidFlags =
+      static_cast<std::uint8_t>((std::uint8_t{1} << AttributeCount) - 1);
+
+  [[nodiscard]] static constexpr bool
+  isValidAttribute(MachineBasicBlockAttribute Attribute) noexcept {
+    return static_cast<std::uint8_t>(Attribute) < AttributeCount;
+  }
+
+  [[nodiscard]] static constexpr std::uint8_t
+  flagFor(MachineBasicBlockAttribute Attribute) noexcept {
+    return static_cast<std::uint8_t>(std::uint8_t{1} << static_cast<std::uint8_t>(Attribute));
+  }
+
+  std::uint8_t Flags = 0;
+  std::optional<std::string> Name;
+  std::optional<std::string> IRBlockName;
+  Alignment BlockAlignment;
+  MachineBasicBlockSectionID SectionID;
+  std::optional<MachineBasicBlockProfileID> ProfileID;
+  std::uint32_t CallFrameSize = 0;
+};
+
+} // namespace rcc
+
+#endif // RCC_CODEGEN_MACHINEBASICBLOCKATTRIBUTES_H