Merge branch 'IROptPre' into backend

src/sysyc.cpp

@@ -9,6 +9,7 @@ using namespace antlr4;
 // #include "Backend.h"
 #include "SysYIRGenerator.h"
 #include "SysYIRPrinter.h"
+#include "SysYIROptPre.h"
 #include "RISCv32Backend.h"
 // #include "LLVMIRGenerator.h"
 using namespace sysy;
@@ -79,6 +80,19 @@ int main(int argc, char **argv) {
     auto moduleIR = generator.get(); 
     SysYPrinter printer(moduleIR);
     printer.printIR();
+    auto builder = generator.getBuilder();
+    SysYOptPre optPre(moduleIR, builder);
+    optPre.SysYOptimizateAfterIR();
+    printer.printIR();
+    return EXIT_SUCCESS;
+  }
+
+  // generate assembly
+  auto module = generator.get();
+  sysy::RISCv32CodeGen codegen(module);
+  string asmCode = codegen.code_gen();
+  if (argStopAfter == "asm") {
+    cout << asmCode << endl;
     return EXIT_SUCCESS;
   }