public LocalInfo declareLocal(TypeInfo type, String name, bool mark) {
checkCreated();
var currentScope = this.scopes[this.scopes.size() - 1];
var result = new LocalInfo(type, name, currentScope.localIndex, null, currentScope.endLabel);
switch (type.getTypeKind()) {
case Long:
case Double:
currentScope.localIndex += 2;
break;
default:
currentScope.localIndex++;
break;
}
locals.add(result);
currentScope.locals[name] = result;
if (mark) {
if (result.beginLabel == null) {
if (instructions[instructions.size() - 1].Opcode == Opcode.LabelMarker) {
result.beginLabel = ((LabelMarker)instructions[instructions.size() - 1]).Label;
} else {
result.beginLabel = new Label();
instructions.add(new LabelMarker(result.beginLabel));
}
}
}
return result;
}
public void emit(Opcode opcode, LocalInfo local) {
checkCreated();
int operand = local.Index;
switch (opcode) {
case Aload:
switch (operand) {
case 0:
instructions.add(Instruction.Aload_0);
break;
case 1:
instructions.add(Instruction.Aload_1);
break;
case 2:
instructions.add(Instruction.Aload_2);
break;
case 3:
instructions.add(Instruction.Aload_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Astore:
switch (operand) {
case 0:
instructions.add(Instruction.Astore_0);
break;
case 1:
instructions.add(Instruction.Astore_1);
break;
case 2:
instructions.add(Instruction.Astore_2);
break;
case 3:
instructions.add(Instruction.Astore_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Dload:
switch (operand) {
case 0:
instructions.add(Instruction.Dload_0);
break;
case 1:
instructions.add(Instruction.Dload_1);
break;
case 2:
instructions.add(Instruction.Dload_2);
break;
case 3:
instructions.add(Instruction.Dload_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Dstore:
switch (operand) {
case 0:
instructions.add(Instruction.Dstore_0);
break;
case 1:
instructions.add(Instruction.Dstore_1);
break;
case 2:
instructions.add(Instruction.Dstore_2);
break;
case 3:
instructions.add(Instruction.Dstore_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Fload:
switch (operand) {
case 0:
instructions.add(Instruction.Fload_0);
break;
case 1:
instructions.add(Instruction.Fload_1);
break;
case 2:
instructions.add(Instruction.Fload_2);
break;
case 3:
instructions.add(Instruction.Fload_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Fstore:
switch (operand) {
case 0:
instructions.add(Instruction.Fstore_0);
break;
case 1:
instructions.add(Instruction.Fstore_1);
break;
case 2:
instructions.add(Instruction.Fstore_2);
break;
case 3:
instructions.add(Instruction.Fstore_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Iload:
switch (operand) {
case 0:
instructions.add(Instruction.Iload_0);
break;
case 1:
instructions.add(Instruction.Iload_1);
break;
case 2:
instructions.add(Instruction.Iload_2);
break;
case 3:
instructions.add(Instruction.Iload_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Istore:
switch (operand) {
case 0:
instructions.add(Instruction.Istore_0);
break;
case 1:
instructions.add(Instruction.Istore_1);
break;
case 2:
instructions.add(Instruction.Istore_2);
break;
case 3:
instructions.add(Instruction.Istore_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Lload:
switch (operand) {
case 0:
instructions.add(Instruction.Lload_0);
break;
case 1:
instructions.add(Instruction.Lload_1);
break;
case 2:
instructions.add(Instruction.Lload_2);
break;
case 3:
instructions.add(Instruction.Lload_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Lstore:
switch (operand) {
case 0:
instructions.add(Instruction.Lstore_0);
break;
case 1:
instructions.add(Instruction.Lstore_1);
break;
case 2:
instructions.add(Instruction.Lstore_2);
break;
case 3:
instructions.add(Instruction.Lstore_3);
break;
default:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
}
break;
case Ret:
instructions.add(new LocalVariableInstruction(opcode, operand));
break;
default:
throw new IllegalStateException("Illegal opcode usage: " + opcode);
}
if (local.beginLabel == null) {
if (instructions[instructions.size() - 1].Opcode == Opcode.LabelMarker) {
local.beginLabel = ((LabelMarker)instructions[instructions.size() - 1]).Label;
} else {
local.beginLabel = new Label();
instructions.add(new LabelMarker(local.beginLabel));
}
}
}
public void emit(Opcode opcode, LocalInfo local, int increment) {
checkCreated();
if (opcode != Opcode.Iinc) {
throw new IllegalStateException("Illegal opcode usage: " + opcode);
}
instructions.add(new IncrementInstruction(local.getIndex(), increment));
}