[backend] introduced rv32 backend

src/sysyc.cpp

@@ -9,7 +9,6 @@ using namespace antlr4;
 #include "ASTPrinter.h"
 #include "Backend.h"
 #include "SysYIRGenerator.h"
-#include "LLVMIRGenerator.h"
 using namespace sysy;
 
 static string argStopAfter;
@@ -78,26 +77,22 @@ int main(int argc, char **argv) {
   }
 
   // visit AST to generate IR
-
+  SysYIRGenerator generator;
+  generator.visitCompUnit(moduleAST);
   if (argStopAfter == "ir") {
     SysYIRGenerator generator;
     generator.visitCompUnit(moduleAST);
     auto moduleIR = generator.get();
     moduleIR->print(cout);
     return EXIT_SUCCESS;
-  } else if (argStopAfter == "llvmir") {
-    LLVMIRGenerator llvmirGenerator;
-    llvmirGenerator.generateIR(moduleAST); // 使用公共接口生成 IR
-    cout << llvmirGenerator.getIR();
-    return EXIT_SUCCESS;
   }
 
-  // // generate assembly
-  // CodeGen codegen(moduleIR);
-  // string asmCode = codegen.code_gen();
-  // cout << asmCode << endl;
-  // if (argStopAfter == "asm")
-  //   return EXIT_SUCCESS;
+  // generate assembly
+  RISCv32CodeGen codegen(moduleIR);
+  string asmCode = codegen.code_gen();
+  cout << asmCode << endl;
+  if (argStopAfter == "asm")
+    return EXIT_SUCCESS;
 
   return EXIT_SUCCESS;
 }