diff options
Diffstat (limited to 'src/minijava/visitor/GenPigletVisitor.java')
| -rw-r--r-- | src/minijava/visitor/GenPigletVisitor.java | 178 |
1 files changed, 92 insertions, 86 deletions
diff --git a/src/minijava/visitor/GenPigletVisitor.java b/src/minijava/visitor/GenPigletVisitor.java index ff21266..c2314e9 100644 --- a/src/minijava/visitor/GenPigletVisitor.java +++ b/src/minijava/visitor/GenPigletVisitor.java @@ -5,6 +5,7 @@ package minijava.visitor; import java.util.Enumeration; +import aux.CCPrinter; import minijava.minijava2piglet.PigletBinding; import minijava.minijava2piglet.PigletLabel; import minijava.minijava2piglet.PigletTemp; @@ -17,6 +18,11 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { int nParams; int usedParams; String tmp; + public CCPrinter prn; + + public GenPigletVisitor() { + prn = new CCPrinter(); + } // // Auto class visitors--probably don't need to be overridden. // @@ -99,9 +105,9 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { */ public MType visit(MainClass n, MType argu) { MClasses all_classes = (MClasses)argu; - System.out.println("MAIN"); + prn.println("MAIN"); n.f14.accept(this, all_classes.main_class.findMethodByName("main")); - System.out.println("\nEND\n"); + prn.println("\nEND\n"); return null; } @@ -187,9 +193,9 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { MMethod the_method = m_class.findMethodByName(method_name); int nParams = the_method.paramList.size(); - System.out.println(m_class.getName() + "_" + method_name + prn.println(m_class.getName() + "_" + method_name + " [ " + Math.min(20,(nParams+1)) +" ] "); - System.out.println("BEGIN"); + prn.println("BEGIN"); // generate local variable bindings the_method.genLocalVarBindings(); @@ -197,10 +203,10 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { // 语句处理 n.f8.accept(this, the_method); // 返回表达式 - System.out.print("\nRETURN "); + prn.print("\nRETURN "); n.f10.accept(this, the_method); - System.out.println("\nEND\n"); + prn.println("\nEND\n"); return null; } @@ -300,11 +306,11 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { if (binding.write==null) { // Identifier为TEMP，则使用MOVE - System.out.print("\nMOVE " + binding.read + " "); + prn.print("\nMOVE " + binding.read + " "); n.f2.accept(this, argu); } else { // Identifier为内存单元，使用HSTORE - System.out.print("\nHSTORE " + binding.write + " "); + prn.print("\nHSTORE " + binding.write + " "); n.f2.accept(this, argu); } @@ -327,14 +333,14 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { // load t_base String identifier = n.f0.accept(this, null).getName(); PigletBinding binding = m_method.getBinding(identifier); - System.out.println("\nMOVE " + t_base + " " + binding.read); + prn.println("\nMOVE " + t_base + " " + binding.read); // load index - System.out.print("\nMOVE " + t_idx + " "); + prn.print("\nMOVE " + t_idx + " "); n.f2.accept(this, argu); // calculate address - System.out.print("\nMOVE " + t_idx + " TIMES 4 PLUS 1 " + t_idx); - System.out.print("\nMOVE " + t_base + " PLUS " + t_base + " " + t_idx); - System.out.print("\nHSTORE " + t_base + " 0 "); + prn.print("\nMOVE " + t_idx + " TIMES 4 PLUS 1 " + t_idx); + prn.print("\nMOVE " + t_base + " PLUS " + t_base + " " + t_idx); + prn.print("\nHSTORE " + t_base + " 0 "); n.f5.accept(this, argu); return null; } @@ -349,16 +355,16 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f6 -> Statement() */ public MType visit(IfStatement n, MType argu) { - System.out.print("\nCJUMP "); + prn.print("\nCJUMP "); n.f2.accept(this, argu); String lb_false = PigletLabel.newLabel(); String lb_end = PigletLabel.newLabel(); - System.out.println(" " + lb_false); + prn.println(" " + lb_false); n.f4.accept(this, argu); - System.out.println("\nJUMP " + lb_end); - System.out.print(lb_false+" "); + prn.println("\nJUMP " + lb_end); + prn.print(lb_false+" "); n.f6.accept(this, argu); - System.out.println("\n" + lb_end + " NOOP"); + prn.println("\n" + lb_end + " NOOP"); return null; } @@ -372,12 +378,12 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { public MType visit(WhileStatement n, MType argu) { String lb_start = PigletLabel.newLabel(); String lb_end = PigletLabel.newLabel(); - System.out.print("\n" + lb_start + " CJUMP "); + prn.print("\n" + lb_start + " CJUMP "); n.f2.accept(this, argu); - System.out.println(" " + lb_end); + prn.println(" " + lb_end); n.f4.accept(this, argu); - System.out.println("\nJUMP " + lb_start); - System.out.println(lb_end + " NOOP"); + prn.println("\nJUMP " + lb_start); + prn.println(lb_end + " NOOP"); return null; } @@ -389,7 +395,7 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f4 -> ";" */ public MType visit(PrintStatement n, MType argu) { - System.out.print("\nPRINT "); + prn.print("\nPRINT "); n.f2.accept(this, argu); return null; } @@ -415,19 +421,19 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f2 -> PrimaryExpression() */ public MType visit(AndExpression n, MType argu) { - System.out.println("\nBEGIN"); + prn.println("\nBEGIN"); String tmp1 = PigletTemp.newTmp(); String tmp2 = PigletTemp.newTmp(); String lb = PigletLabel.newLabel(); - System.out.println("MOVE " + tmp2 + " 0"); - System.out.print("MOVE " + tmp1 + " "); + prn.println("MOVE " + tmp2 + " 0"); + prn.print("MOVE " + tmp1 + " "); n.f0.accept(this, argu); - System.out.println("\nCJUMP " + tmp1 + " " + lb ); - System.out.print("MOVE " + tmp2 + " "); + prn.println("\nCJUMP " + tmp1 + " " + lb ); + prn.print("MOVE " + tmp2 + " "); n.f2.accept(this, argu); - System.out.println("\n" + lb + " NOOP"); - System.out.println("RETURN " + tmp2); - System.out.println("END"); + prn.println("\n" + lb + " NOOP"); + prn.println("RETURN " + tmp2); + prn.println("END"); return null; } @@ -437,9 +443,9 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f2 -> PrimaryExpression() */ public MType visit(CompareExpression n, MType argu) { - System.out.print("LT "); + prn.print("LT "); n.f0.accept(this, argu); - System.out.print(" "); + prn.print(" "); n.f2.accept(this, argu); return null; } @@ -450,9 +456,9 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f2 -> PrimaryExpression() */ public MType visit(PlusExpression n, MType argu) { - System.out.print("PLUS "); + prn.print("PLUS "); n.f0.accept(this, argu); - System.out.print(" "); + prn.print(" "); n.f2.accept(this, argu); return null; } @@ -463,9 +469,9 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f2 -> PrimaryExpression() */ public MType visit(MinusExpression n, MType argu) { - System.out.print("MINUS "); + prn.print("MINUS "); n.f0.accept(this, argu); - System.out.print(" "); + prn.print(" "); n.f2.accept(this, argu); return null; } @@ -476,9 +482,9 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f2 -> PrimaryExpression() */ public MType visit(TimesExpression n, MType argu) { - System.out.print("TIMES "); + prn.print("TIMES "); n.f0.accept(this, argu); - System.out.print(" "); + prn.print(" "); n.f2.accept(this, argu); return null; } @@ -490,18 +496,18 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f3 -> "]" */ public MType visit(ArrayLookup n, MType argu) { - System.out.println("\nBEGIN"); + prn.println("\nBEGIN"); String tmp_arr = PigletTemp.newTmp(); String tmp_idx = PigletTemp.newTmp(); String tmp_ret = PigletTemp.newTmp(); - System.out.print("MOVE " + tmp_arr + " "); + prn.print("MOVE " + tmp_arr + " "); n.f0.accept(this, argu); - System.out.print("\nMOVE " + tmp_idx + " "); + prn.print("\nMOVE " + tmp_idx + " "); n.f2.accept(this, argu); - System.out.println("\nMOVE " + tmp_arr + " PLUS " + tmp_arr + " TIMES " + tmp_idx + " 4"); - System.out.println("HLOAD " + tmp_ret + " " + tmp_arr + " 4"); - System.out.println("RETURN " + tmp_ret); - System.out.println("END"); + prn.println("\nMOVE " + tmp_arr + " PLUS " + tmp_arr + " TIMES " + tmp_idx + " 4"); + prn.println("HLOAD " + tmp_ret + " " + tmp_arr + " 4"); + prn.println("RETURN " + tmp_ret); + prn.println("END"); return null; } @@ -511,13 +517,13 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f2 -> "length" */ public MType visit(ArrayLength n, MType argu) { - System.out.println("\nBEGIN"); + prn.println("\nBEGIN"); String tmp_arr = PigletTemp.newTmp(); - System.out.print("HLOAD " + tmp_arr + " "); + prn.print("HLOAD " + tmp_arr + " "); n.f0.accept(this, argu); - System.out.println(" 0"); - System.out.println("RETURN " + tmp_arr); - System.out.println("END"); + prn.println(" 0"); + prn.println("RETURN " + tmp_arr); + prn.println("END"); return null; } @@ -530,26 +536,26 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f5 -> ")" */ public MType visit(MessageSend n, MType argu) { - System.out.println("\nBEGIN"); + prn.println("\nBEGIN"); String t_exp = PigletTemp.newTmp(); String t_method = PigletTemp.newTmp(); - System.out.print("MOVE " + t_exp + " "); + prn.print("MOVE " + t_exp + " "); MClass exp_class = (MClass)(n.f0.accept(this, argu)); String m_name = n.f2.accept(this, null).getName(); int m_offs = exp_class.getMethodBinding(m_name); nParams = exp_class.r_findMethodByName(m_name).paramList.size(); - System.out.println("\nHLOAD " + t_method + " " + t_exp + " 0"); - System.out.println("HLOAD " + t_method + " " + t_method + " " + m_offs); - System.out.println("RETURN"); - System.out.print("CALL " + t_method + " ( " + t_exp + " "); + prn.println("\nHLOAD " + t_method + " " + t_exp + " 0"); + prn.println("HLOAD " + t_method + " " + t_method + " " + m_offs); + prn.println("RETURN"); + prn.print("CALL " + t_method + " ( " + t_exp + " "); // arguments in ExpressionList n.f4.accept(this, argu); if (nParams>=20) { - System.out.println("\nRETURN " + tmp); - System.out.println("END"); + prn.println("\nRETURN " + tmp); + prn.println("END"); } - System.out.println(" ) "); - System.out.println("END"); + prn.println(" ) "); + prn.println("END"); MMethod m = exp_class.r_findMethodByName(m_name); String ret_type_name = m.ret_type_name; MClass ret_class = exp_class.all_classes.findClassByName(ret_type_name); @@ -573,17 +579,17 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { */ public MType visit(ExpressionRest n, MType argu) { usedParams++; - System.out.print(" "); + prn.print(" "); if (nParams>=20 && usedParams==19) { // allocate the memory tmp = PigletTemp.newTmp(); - System.out.println("\nBEGIN"); - System.out.println("MOVE " + tmp + " HALLOCATE " + (nParams-18)*4); + prn.println("\nBEGIN"); + prn.println("MOVE " + tmp + " HALLOCATE " + (nParams-18)*4); // store the first param - System.out.print("HSTORE " + tmp + " 0 "); + prn.print("HSTORE " + tmp + " 0 "); n.f1.accept(this, argu); } else if (nParams>=20 && usedParams>=20) { - System.out.print("\nHSTORE " + tmp + " " + (usedParams-19)*4 + " "); + prn.print("\nHSTORE " + tmp + " " + (usedParams-19)*4 + " "); n.f1.accept(this, argu); } else { n.f1.accept(this, argu); @@ -612,7 +618,7 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { */ public MType visit(IntegerLiteral n, MType argu) { int val = Integer.parseInt(n.f0.tokenImage); - System.out.print(val+" "); + prn.print(val+" "); return null; } @@ -620,7 +626,7 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f0 -> "true" */ public MType visit(TrueLiteral n, MType argu) { - System.out.print(1+" "); + prn.print(1+" "); return null; } @@ -628,7 +634,7 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f0 -> "false" */ public MType visit(FalseLiteral n, MType argu) { - System.out.print(0+" "); + prn.print(0+" "); return null; } @@ -645,7 +651,7 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { // argu is some expression in method, should return a class and print the code MVariable vv = ((MMethod)argu).findVarByName(identifier_name); MClass the_class = ((MMethod)argu).method_class.all_classes.findClassByName(vv.typename); - System.out.print( ((MMethod)argu).getBinding(identifier_name).read ); + prn.print( ((MMethod)argu).getBinding(identifier_name).read ); return the_class; } } @@ -654,7 +660,7 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { * f0 -> "this" */ public MType visit(ThisExpression n, MType argu) { - System.out.print("TEMP 0 "); + prn.print("TEMP 0 "); return ((MMethod)argu).method_class; } @@ -668,15 +674,15 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { public MType visit(ArrayAllocationExpression n, MType argu) { String tmp_len = PigletTemp.newTmp(); String tmp_arr = PigletTemp.newTmp(); - System.out.println("\nBEGIN"); - System.out.print("MOVE " + tmp_len + " "); + prn.println("\nBEGIN"); + prn.print("MOVE " + tmp_len + " "); n.f3.accept(this, argu); // the first element of the array stores the length // the rest store the elements - System.out.println("\nMOVE " + tmp_arr + " HALLOCATE TIMES 4 PLUS 1 " + tmp_len); - System.out.println("HSTORE " + tmp_arr + " 0 " + tmp_len); - System.out.println("RETURN " + tmp_arr); - System.out.println("END"); + prn.println("\nMOVE " + tmp_arr + " HALLOCATE TIMES 4 PLUS 1 " + tmp_len); + prn.println("HSTORE " + tmp_arr + " 0 " + tmp_len); + prn.println("RETURN " + tmp_arr); + prn.println("END"); return null; } @@ -689,7 +695,7 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { public MType visit(AllocationExpression n, MType argu) { MClasses all_classes = ((MMethod)argu).method_class.all_classes; MClass new_class = all_classes.findClassByName(n.f1.accept(this, null).getName()); - System.out.println(new_class.newString()); + prn.println(new_class.newString()); return new_class; } @@ -702,15 +708,15 @@ public class GenPigletVisitor extends GJDepthFirst<MType, MType> { String tmp = PigletTemp.newTmp(); String result = PigletTemp.newTmp(); - System.out.println("\nBEGIN"); - System.out.println("MOVE " + result + " 1"); - System.out.print("MOVE " + tmp + " "); + prn.println("\nBEGIN"); + prn.println("MOVE " + result + " 1"); + prn.print("MOVE " + tmp + " "); n.f1.accept(this, argu); - System.out.println("\nCJUMP LT 0 " + tmp + " " + false_label); - System.out.println("MOVE " + result + " 0"); - System.out.println(false_label + " NOOP"); - System.out.println("RETURN " + result); - System.out.println("END"); + prn.println("\nCJUMP LT 0 " + tmp + " " + false_label); + prn.println("MOVE " + result + " 0"); + prn.println(false_label + " NOOP"); + prn.println("RETURN " + result); + prn.println("END"); return null; } |