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Updated If and WhileStatement

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This commit is contained in:
Jochen Seyfried 2024-05-14 14:54:33 +02:00
parent f2260c7a73
commit 0fcea195de
2 changed files with 7 additions and 2 deletions
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4
src/main/java/abstractSyntaxTree/Statement/IfStatement.java
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@ -38,12 +38,14 @@ public class IfStatement extends AbstractType implements IStatement{
@Override @Override
public void codeGen(MethodVisitor mv, HashMap<String, String> localVars) throws Exception { public void codeGen(MethodVisitor mv, HashMap<String, String> localVars) throws Exception {
HashMap<String, String> blockLocalVars = new HashMap<>(localVars);
Label conditionFalse = new Label(); Label conditionFalse = new Label();
condition.codeGen(mv); condition.codeGen(mv);
mv.visitJumpInsn(Opcodes.IFEQ, conditionFalse); //Checks if the condition is false (0) mv.visitJumpInsn(Opcodes.IFEQ, conditionFalse); //Checks if the condition is false (0)
ifStatement.codeGen(mv); ifStatement.codeGen(mv, blockLocalVars);
mv.visitLabel(conditionFalse); // If the condition is false, the Statements in the ifBlock will not be executed mv.visitLabel(conditionFalse); // If the condition is false, the Statements in the ifBlock will not be executed
} }

5
src/main/java/abstractSyntaxTree/Statement/WhileStatement.java
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@ -36,6 +36,9 @@ public class WhileStatement extends AbstractType implements IStatement {
@Override @Override
public void codeGen(MethodVisitor mv, HashMap<String, String> localVars) throws Exception { public void codeGen(MethodVisitor mv, HashMap<String, String> localVars) throws Exception {
HashMap<String, String> blockLocalVars = new HashMap<>(localVars);
Label conditionFalse = new Label(); Label conditionFalse = new Label();
Label LoopStart = new Label(); Label LoopStart = new Label();
@ -44,7 +47,7 @@ public class WhileStatement extends AbstractType implements IStatement {
condition.codeGen(mv); condition.codeGen(mv);
mv.visitJumpInsn(Opcodes.IFEQ, conditionFalse); // Checks if the condition is false (0) mv.visitJumpInsn(Opcodes.IFEQ, conditionFalse); // Checks if the condition is false (0)
statement.codeGen(mv); statement.codeGen(mv, blockLocalVars);
//TODO: If the block ends with a return statement, we might have to pop it from the stack //TODO: If the block ends with a return statement, we might have to pop it from the stack
// So the next iteration starts with a clean stack // So the next iteration starts with a clean stack
mv.visitJumpInsn(Opcodes.GOTO, LoopStart); // Jump to the start of the while loop mv.visitJumpInsn(Opcodes.GOTO, LoopStart); // Jump to the start of the while loop