[CodeGen] Implement machine optimization and scheduling

1 files changed, 40 insertions, 0 deletions

diff --git a/backend/include/rcc/CodeGen/TargetPseudoExpansion.h b/backend/include/rcc/CodeGen/TargetPseudoExpansion.h
new file mode 100644
index 0000000..4d9f556
--- /dev/null
+++ b/backend/include/rcc/CodeGen/TargetPseudoExpansion.h
@@ -0,0 +1,40 @@
+// SPDX-License-Identifier: GPL-3.0-or-later
+
+#ifndef RCC_CODEGEN_TARGETPSEUDOEXPANSION_H
+#define RCC_CODEGEN_TARGETPSEUDOEXPANSION_H
+
+#include "rcc/Support/Error.h"
+
+#include <cstdint>
+
+namespace rcc {
+
+class MachineFunction;
+class MachineInstr;
+class TargetDescription;
+
+enum class MachinePseudoExpansionPhase : std::uint8_t {
+  PrePEI,
+  PostRA,
+  TargetLate,
+};
+
+class TargetPseudoExpansionInfo {
+public:
+  virtual ~TargetPseudoExpansionInfo() = default;
+
+  [[nodiscard]] virtual Expected<bool> preparePostRAPseudo(MachineInstr &, MachineFunction &,
+                                                           const TargetDescription &) const {
+    return false;
+  }
+
+  [[nodiscard]] virtual Expected<bool> expandPseudo(MachineInstr &, MachinePseudoExpansionPhase,
+                                                    MachineFunction &,
+                                                    const TargetDescription &) const {
+    return false;
+  }
+};
+
+} // namespace rcc
+
+#endif // RCC_CODEGEN_TARGETPSEUDOEXPANSION_H