Class VariableAccessGenerator

java.lang.Object

org.ek9lang.compiler.backend.jvm.support.VariableAccessGenerator

public final class VariableAccessGenerator
extends Object

Generates JVM bytecode for variable load and store operations.

Handles:

• Local variable access (ALOAD/ASTORE)
• Field access on 'this' (GETFIELD/PUTFIELD)
• Field access on other variables
• Variable slot allocation
• Label management

Constructor Summary

Constructors

Constructor	Description
VariableAccessGenerator(MethodContext methodContext, Supplier<String> ownerClassNameSupplier)

Method Summary

Modifier and Type	Method	Description
String	extractFieldName(String variableName)	Extract field name from variable name (with or without "this." prefix).
void	generateLoadVariable(org.objectweb.asm.MethodVisitor mv, String variableName)	Generate JVM instructions for loading a variable.
void	generateStoreVariable(org.objectweb.asm.MethodVisitor mv, String variableName)	Generate JVM instructions for storing to a variable.
void	generateStoreVariableAsInt(org.objectweb.asm.MethodVisitor mv, String variableName)	Generate JVM instructions for storing a primitive int to a variable.
String	getFieldDescriptor(String variableName)	Get field type descriptor for putfield/getfield instructions.
org.objectweb.asm.Label	getOrCreateLabel(String labelName)	Get or create JVM Label for IR label name.
String	getOwnerClassName()	Get owner class name for field access.
int	getVariableIndex(String variableName)	Get or assign local variable slot for a variable name.
boolean	isFieldAccess(String variableName)	Check if variable name represents field access on 'this'.
boolean	isVariableAllocated(String variableName)	Check if a variable has already been allocated a local variable slot.
boolean	isVariableFieldAccess(String variableName)	Check if variable name represents field access on another variable.
void	trackTempVariableFromLiteral(String tempVar, String literalValue, String literalType)	Track that a temp variable was created from a literal value.
void	trackTempVariableFromLoad(String tempVar, String sourceVar)	Track that a temp variable was created from loading another variable.

Methods inherited from class Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

VariableAccessGenerator

public VariableAccessGenerator(MethodContext methodContext,
 Supplier<String> ownerClassNameSupplier)

Method Details

generateLoadVariable

public void generateLoadVariable(org.objectweb.asm.MethodVisitor mv,
 String variableName)

Generate JVM instructions for loading a variable. Uses the appropriate load opcode based on variable type (ALOAD for objects, ILOAD for primitives).

generateStoreVariable

public void generateStoreVariable(org.objectweb.asm.MethodVisitor mv,
 String variableName)

Generate JVM instructions for storing to a variable.

generateStoreVariableAsInt

public void generateStoreVariableAsInt(org.objectweb.asm.MethodVisitor mv,
 String variableName)

Generate JVM instructions for storing a primitive int to a variable.

Used for INSTANCEOF results which produce primitive int (0 or 1).

isFieldAccess

public boolean isFieldAccess(String variableName)

Check if variable name represents field access on 'this'. A variable explicitly prefixed with "this." is always a field access. An unqualified name is field access only if it matches a field AND is not already allocated as a local variable (e.g., a parameter with the same name as a field).

isVariableFieldAccess

public boolean isVariableFieldAccess(String variableName)

Check if variable name represents field access on another variable.

extractFieldName

public String extractFieldName(String variableName)

Extract field name from variable name (with or without "this." prefix).

getFieldDescriptor

public String getFieldDescriptor(String variableName)

Get field type descriptor for putfield/getfield instructions.

getOwnerClassName

public String getOwnerClassName()

Get owner class name for field access.

getVariableIndex

public int getVariableIndex(String variableName)

Get or assign local variable slot for a variable name.

isVariableAllocated

public boolean isVariableAllocated(String variableName)

Check if a variable has already been allocated a local variable slot.

getOrCreateLabel

public org.objectweb.asm.Label getOrCreateLabel(String labelName)

Get or create JVM Label for IR label name.

trackTempVariableFromLoad

public void trackTempVariableFromLoad(String tempVar,
 String sourceVar)

Track that a temp variable was created from loading another variable.

trackTempVariableFromLiteral

public void trackTempVariableFromLiteral(String tempVar,
 String literalValue,
 String literalType)

Track that a temp variable was created from a literal value.