1 files changed, 131 insertions, 0 deletions
diff --git a/backend/lib/MIR/MIRDocumentParser.h b/backend/lib/MIR/MIRDocumentParser.h
new file mode 100644
index 0000000..53a31b4
--- /dev/null
+++ b/backend/lib/MIR/MIRDocumentParser.h
@@ -0,0 +1,131 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+// NOLINTNEXTLINE(llvm-header-guard)
+#ifndef RCC_LIB_MIR_MIRDOCUMENTPARSER_H
+#define RCC_LIB_MIR_MIRDOCUMENTPARSER_H
+
+#include "rcc/CodeGen/MachineDebugInfo.h"
+#include "rcc/CodeGen/MachineFrameInfo.h"
+#include "rcc/CodeGen/MachineJumpTableInfo.h"
+#include "rcc/CodeGen/MachineMetadata.h"
+#include "rcc/CodeGen/TargetMIRTextInfo.h"
+#include "rcc/MIR/LLVMConstantSyntax.h"
+#include "rcc/MIR/MIRDocument.h"
+
+#include <cstdint>
+#include <span>
+#include <string>
+#include <string_view>
+#include <utility>
+#include <vector>
+
+namespace rcc {
+
+class MachineBasicBlock;
+class MachineFunction;
+class MachineInstr;
+
+namespace mir {
+
+struct PendingJumpTable final {
+  JumpTableIndex Index;
+  std::uint32_t TextID = 0;
+  JumpTableEntryEncoding Encoding = JumpTableEntryEncoding::BlockAddress;
+  std::uint8_t EntrySize = 8;
+  std::vector<std::string> Blocks;
+};
+
+class MIRDocumentParser final {
+public:
+  MIRDocumentParser(const TargetDescription &Target, std::string SourceName, std::string SourceText,
+                    MIRDocumentParserOptions Options)
+      : Target(Target), Options(std::move(Options)),
+        Result(std::move(SourceName), std::move(SourceText)) {}
+
+  [[nodiscard]] MIRDocumentParseResult run();
+
+private:
+  [[nodiscard]] bool fail(const TextRange &Range, std::string Message,
+                          std::string Category = "mir-yaml");
+  [[nodiscard]] bool importError(const TextRange &Range, const Error &Failure,
+                                 std::string Category = "mir-yaml");
+  [[nodiscard]] const yaml::Node *node(yaml::NodeID ID) const noexcept {
+    return Stream->node(ID);
+  }
+  [[nodiscard]] const yaml::Node *mappingValue(const yaml::Node &Mapping,
+                                               std::string_view Key) const noexcept;
+  [[nodiscard]] bool requireKind(const yaml::Node &Node, yaml::NodeKind Kind,
+                                 std::string_view Description);
+  [[nodiscard]] bool validateKeys(const yaml::Node &Mapping, std::span<const std::string_view> Keys,
+                                  std::string_view Description);
+  [[nodiscard]] bool scalar(const yaml::Node &Node, std::string_view &Value,
+                            std::string_view Description);
+  [[nodiscard]] bool boolean(const yaml::Node &Node, bool &Value);
+  [[nodiscard]] bool unsignedValue(const yaml::Node &Node, std::uint64_t &Value,
+                                   std::string_view Description);
+  [[nodiscard]] bool signedValue(const yaml::Node &Node, std::int64_t &Value,
+                                 std::string_view Description);
+  [[nodiscard]] bool alignment(const yaml::Node &Node, Alignment &Value, bool AllowZero);
+  [[nodiscard]] bool physicalRegister(const yaml::Node &Node, PhysicalRegister &Reg);
+  [[nodiscard]] bool physicalRegister(std::string_view Text, const TextRange &Range,
+                                      PhysicalRegister &Reg);
+  [[nodiscard]] bool virtualRegister(std::string_view Text, const TextRange &Range,
+                                     const MIParserContext &Context, Register &Reg);
+  [[nodiscard]] Expected<MachineMetadataReference>
+  resolveMetadataReference(const MachineFunction &Function, std::uint32_t Slot) const;
+  [[nodiscard]] bool parseVariableDebugInfo(const yaml::Node &Entry, MachineFunction &Function,
+                                            MachineVariableDebugInfo &DebugInfo);
+  [[nodiscard]] bool parseFunction(const yaml::Node &Root, MIRDocument &Document);
+  [[nodiscard]] bool parseFunctionScalars(const yaml::Node &Root, MachineFunction &Function,
+                                          MIRFunctionDocumentInfo &DocumentInfo);
+  [[nodiscard]] bool recomputeProperties(const yaml::Node &Root, MachineFunction &Function,
+                                         const MIRFunctionDocumentInfo &DocumentInfo);
+  [[nodiscard]] bool parseRegisters(const yaml::Node &Root, MachineFunction &Function,
+                                    MIParserContext &Context);
+  [[nodiscard]] bool parseMetadata(const yaml::Node &Root, MachineFunction &Function,
+                                   MIParserContext &Context);
+  [[nodiscard]] bool parseStackObjects(const yaml::Node &Root, MachineFunction &Function,
+                                       MIParserContext &Context);
+  [[nodiscard]] bool parseConstants(const yaml::Node &Root, MachineFunction &Function,
+                                    MIParserContext &Context);
+  [[nodiscard]] bool parseFrameState(const yaml::Node &Root, MachineFunction &Function,
+                                     const MIParserContext &Context);
+  [[nodiscard]] bool reserveJumpTables(const yaml::Node &Root, MachineFunction &Function,
+                                       MIParserContext &Context,
+                                       std::vector<PendingJumpTable> &Pending);
+  [[nodiscard]] bool defineJumpTables(MachineFunction &Function,
+                                      std::span<const PendingJumpTable> Pending);
+  [[nodiscard]] bool parseBody(const yaml::Node &Root, MachineFunction &Function,
+                               MIParserContext &Context);
+  [[nodiscard]] TextRange bodyDiagnosticRange(const yaml::Node &Body,
+                                              const TextRange &BodyRange) const noexcept;
+  [[nodiscard]] bool parseFunctionRecords(const yaml::Node &Root, MachineFunction &Function);
+  [[nodiscard]] bool parseTargetState(const yaml::Node &Root, MachineFunction &Function);
+  [[nodiscard]] bool convertTargetNode(const yaml::Node &Source, MIRTargetNode &Destination);
+  [[nodiscard]] bool validateDocumentReferences(const MachineFunction &Function);
+  [[nodiscard]] std::string_view effectiveDataLayout() const noexcept;
+  [[nodiscard]] LLVMConstantSyntaxOptions pointerLayoutOptions() const noexcept;
+
+  [[nodiscard]] MachineBasicBlock *blockAt(MachineFunction &Function,
+                                           std::uint32_t Number) const noexcept;
+  [[nodiscard]] MachineInstr *instructionAt(MachineFunction &Function, std::uint32_t Block,
+                                            std::uint32_t Offset) const noexcept;
+  [[nodiscard]] bool parseBlockReference(std::string_view Text, const TextRange &Range,
+                                         MachineFunction &Function, MachineBasicBlock *&Block);
+  [[nodiscard]] bool parseFrameReference(const yaml::Node &Node, const MIParserContext &Context,
+                                         FrameIndex &Index);
+  [[nodiscard]] bool parseSaveRestorePoints(const yaml::Node &Node, MachineFunction &Function,
+                                            std::vector<MachineFrameSaveRestorePoint> &Points);
+
+  const TargetDescription &Target;
+  MIRDocumentParserOptions Options;
+  MIRDocumentParseResult Result;
+  const yaml::Stream *Stream = nullptr;
+  MIRDocument *ActiveDocument = nullptr;
+  MachineFunction *ActiveFunction = nullptr;
+};
+
+} // namespace mir
+} // namespace rcc
+
+#endif // RCC_LIB_MIR_MIRDOCUMENTPARSER_H