Merge branch 'DCE' into backend

src/sysyc.cpp

@@ -11,6 +11,10 @@ using namespace antlr4;
 #include "SysYIRPrinter.h"
 #include "SysYIROptPre.h"
 #include "RISCv64Backend.h"
+#include "SysYIRAnalyser.h"
+#include "DeadCodeElimination.h"
+#include "Mem2Reg.h"
+#include "Reg2Mem.h"
 // #include "LLVMIRGenerator.h"
 using namespace sysy;
 
@@ -83,6 +87,23 @@ int main(int argc, char **argv) {
     auto builder = generator.getBuilder();
     SysYOptPre optPre(moduleIR, builder);
     optPre.SysYOptimizateAfterIR();
+    ControlFlowAnalysis cfa(moduleIR);
+    cfa.init();
+    ActiveVarAnalysis ava;
+    ava.init(moduleIR);
+    printer.printIR();
+
+    
+    DeadCodeElimination dce(moduleIR, &cfa, &ava);
+    dce.runDCEPipeline();
+    
+    Mem2Reg mem2reg(moduleIR, builder, &cfa, &ava);
+    mem2reg.mem2regPipeline();
+    printer.printIR();
+    Reg2Mem reg2mem(moduleIR, builder);
+    reg2mem.DeletePhiInst();
+    printer.printIR();
+    dce.runDCEPipeline();
     return EXIT_SUCCESS;
   }