[CodeGen] Add strict MachineIR verification

Verify arena catalogs, intrusive layouts, reciprocal CFG edges, operand ownership, exact def-use coverage, instruction descriptors, pseudo deadlines, and MachineFunctionProperties. Preserve monotonic-arena history while rejecting detached objects that retain live state.

1 files changed, 36 insertions, 0 deletions

diff --git a/backend/include/rcc/CodeGen/MachineVerifier.h b/backend/include/rcc/CodeGen/MachineVerifier.h
new file mode 100644
index 0000000..b1035a2
--- /dev/null
+++ b/backend/include/rcc/CodeGen/MachineVerifier.h
@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_CODEGEN_MACHINEVERIFIER_H
+#define RCC_CODEGEN_MACHINEVERIFIER_H
+
+#include "rcc/CodeGen/InstructionDescriptor.h"
+#include "rcc/Support/Error.h"
+
+#include <cstdint>
+#include <optional>
+
+namespace rcc {
+
+class MachineFunction;
+
+enum class MachineVerifierMode : std::uint8_t {
+  Generic,
+  PreLegalizer,
+};
+
+struct MachineVerifierOptions final {
+  MachineVerifierMode Mode = MachineVerifierMode::Generic;
+  std::optional<PipelineStage> Stage;
+  bool VerifyProperties = true;
+};
+
+class MachineVerifier final {
+public:
+  [[nodiscard]] static Expected<void> verify(const MachineFunction &Function,
+                                             const InstructionSet &Instructions,
+                                             MachineVerifierOptions Options = {});
+};
+
+} // namespace rcc
+
+#endif // RCC_CODEGEN_MACHINEVERIFIER_H