[peephole]Pass架构重构优化

src/include/RISCv64Peephole.h

@@ -0,0 +1,30 @@
+#ifndef RISCV64_PEEPHOLE_H
+#define RISCV64_PEEPHOLE_H
+
+#include "RISCv64LLIR.h"
+#include "Pass.h"
+
+namespace sysy {
+
+/**
+ * @class PeepholeOptimizer
+ * @brief 窥孔优化器
+ * * 在已分配物理寄存器的指令流上，通过一个小的滑动窗口来查找
+ * 并替换掉一些冗余或低效的指令模式。
+ */
+class PeepholeOptimizer : public Pass {
+public:
+    static char ID;
+    
+    PeepholeOptimizer() : Pass("peephole-optimizer", Granularity::Function, PassKind::Optimization) {}
+    
+    void *getPassID() const override { return &ID; }
+    
+    bool runOnFunction(Function *F, AnalysisManager& AM) override;
+    
+    void runOnMachineFunction(MachineFunction* mfunc);
+};
+
+} // namespace sysy
+
+#endif // RISCV64_PEEPHOLE_H