/** Code generation for a array allocation expression */
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
int pc = codeStream.position;
if (initializer != null) {
initializer.generateCode(currentScope, codeStream, valueRequired);
return;
}
int nonNullDimensionsLength = 0;
for (int i = 0, max = dimensions.length; i < max; i++)
if (dimensions[i] != null) {
dimensions[i].generateCode(currentScope, codeStream, true);
nonNullDimensionsLength++;
}
// Generate a sequence of bytecodes corresponding to an array allocation
if (this.resolvedType.dimensions() == 1) {
// Mono-dimensional array
codeStream.newArray((ArrayBinding) this.resolvedType);
} else {
// Multi-dimensional array
codeStream.multianewarray(this.resolvedType, nonNullDimensionsLength);
}
if (valueRequired) {
codeStream.generateImplicitConversion(implicitConversion);
} else {
codeStream.pop();
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
/**
* Code generation for instanceOfExpression
*
* @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
* @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
* @param valueRequired boolean
*/
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
int pc = codeStream.position;
this.expression.generateCode(currentScope, codeStream, true);
codeStream.instance_of(this.type.resolvedType);
if (valueRequired) {
codeStream.generateImplicitConversion(this.implicitConversion);
} else {
codeStream.pop();
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
/**
* MessageSendDotClass code generation
*
* @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
* @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
* @param valueRequired boolean
*/
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
// {ObjectTeams: role class literal?
if (this.roleClassLiteralAccess != null) {
this.roleClassLiteralAccess.generateCode(currentScope, codeStream, valueRequired);
return;
}
// SH}
int pc = codeStream.position;
// in interface case, no caching occurs, since cannot make a cache field for interface
if (valueRequired) {
codeStream.generateClassLiteralAccessForType(this.type.resolvedType, this.syntheticField);
codeStream.generateImplicitConversion(this.implicitConversion);
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
/** Code generation for a binary operation */
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
int pc = codeStream.position;
if (this.constant != Constant.NotAConstant) {
// inlined value
if (valueRequired) codeStream.generateConstant(this.constant, this.implicitConversion);
codeStream.recordPositionsFrom(pc, this.sourceStart);
return;
}
Constant cst = this.right.constant;
if (cst != Constant.NotAConstant) {
// <expr> || true --> true
if (cst.booleanValue() == true) {
this.left.generateCode(currentScope, codeStream, false);
if (valueRequired) codeStream.iconst_1();
} else {
// <expr>|| false --> <expr>
this.left.generateCode(currentScope, codeStream, valueRequired);
}
if (this.mergedInitStateIndex != -1) {
codeStream.removeNotDefinitelyAssignedVariables(currentScope, this.mergedInitStateIndex);
}
codeStream.generateImplicitConversion(this.implicitConversion);
codeStream.recordPositionsFrom(pc, this.sourceStart);
return;
}
BranchLabel trueLabel = new BranchLabel(codeStream), endLabel;
cst = this.left.optimizedBooleanConstant();
boolean leftIsConst = cst != Constant.NotAConstant;
boolean leftIsTrue = leftIsConst && cst.booleanValue() == true;
cst = this.right.optimizedBooleanConstant();
boolean rightIsConst = cst != Constant.NotAConstant;
boolean rightIsTrue = rightIsConst && cst.booleanValue() == true;
generateOperands:
{
if (leftIsConst) {
this.left.generateCode(currentScope, codeStream, false);
if (leftIsTrue) {
break generateOperands; // no need to generate right operand
}
} else {
this.left.generateOptimizedBoolean(currentScope, codeStream, trueLabel, null, true);
// need value, e.g. if (a == 1 || ((b = 2) > 0)) {} -> shouldn't initialize 'b' if a==1
}
if (this.rightInitStateIndex != -1) {
codeStream.addDefinitelyAssignedVariables(currentScope, this.rightInitStateIndex);
}
if (rightIsConst) {
this.right.generateCode(currentScope, codeStream, false);
} else {
this.right.generateOptimizedBoolean(
currentScope, codeStream, trueLabel, null, valueRequired);
}
}
if (this.mergedInitStateIndex != -1) {
codeStream.removeNotDefinitelyAssignedVariables(currentScope, this.mergedInitStateIndex);
}
/*
* improving code gen for such a case: boolean b = i < 0 || true since
* the label has never been used, we have the inlined value on the
* stack.
*/
if (valueRequired) {
if (leftIsConst && leftIsTrue) {
codeStream.iconst_1();
codeStream.recordPositionsFrom(codeStream.position, this.left.sourceEnd);
} else {
if (rightIsConst && rightIsTrue) {
codeStream.iconst_1();
codeStream.recordPositionsFrom(codeStream.position, this.left.sourceEnd);
} else {
codeStream.iconst_0();
}
if (trueLabel.forwardReferenceCount() > 0) {
if ((this.bits & IsReturnedValue) != 0) {
codeStream.generateImplicitConversion(this.implicitConversion);
codeStream.generateReturnBytecode(this);
trueLabel.place();
codeStream.iconst_1();
} else {
codeStream.goto_(endLabel = new BranchLabel(codeStream));
codeStream.decrStackSize(1);
trueLabel.place();
codeStream.iconst_1();
endLabel.place();
}
} else {
trueLabel.place();
}
}
codeStream.generateImplicitConversion(this.implicitConversion);
codeStream.recordPositionsFrom(codeStream.position, this.sourceEnd);
} else {
trueLabel.place();
}
}
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
if (!valueRequired) currentScope.problemReporter().unusedObjectAllocation(this);
int pc = codeStream.position;
MethodBinding codegenBinding = this.binding.original();
ReferenceBinding allocatedType = codegenBinding.declaringClass;
codeStream.new_(allocatedType);
boolean isUnboxing = (this.implicitConversion & TypeIds.UNBOXING) != 0;
if (valueRequired || isUnboxing) {
codeStream.dup();
}
// better highlight for allocation: display the type individually
if (this.type != null) { // null for enum constant body
codeStream.recordPositionsFrom(pc, this.type.sourceStart);
} else {
// push enum constant name and ordinal
codeStream.ldc(String.valueOf(this.enumConstant.name));
codeStream.generateInlinedValue(this.enumConstant.binding.id);
}
// handling innerclass instance allocation - enclosing instance arguments
if (allocatedType.isNestedType()) {
codeStream.generateSyntheticEnclosingInstanceValues(
currentScope, allocatedType, enclosingInstance(), this);
}
// generate the arguments for constructor
generateArguments(this.binding, this.arguments, currentScope, codeStream);
// handling innerclass instance allocation - outer local arguments
if (allocatedType.isNestedType()) {
codeStream.generateSyntheticOuterArgumentValues(currentScope, allocatedType, this);
}
// invoke constructor
if (this.syntheticAccessor == null) {
codeStream.invoke(
Opcodes.OPC_invokespecial, codegenBinding, null /* default declaringClass */);
} else {
// synthetic accessor got some extra arguments appended to its signature, which need values
for (int i = 0,
max = this.syntheticAccessor.parameters.length - codegenBinding.parameters.length;
i < max;
i++) {
codeStream.aconst_null();
}
codeStream.invoke(
Opcodes.OPC_invokespecial, this.syntheticAccessor, null /* default declaringClass */);
}
if (valueRequired) {
codeStream.generateImplicitConversion(this.implicitConversion);
} else if (isUnboxing) {
// conversion only generated if unboxing
codeStream.generateImplicitConversion(this.implicitConversion);
switch (postConversionType(currentScope).id) {
case T_long:
case T_double:
codeStream.pop2();
break;
default:
codeStream.pop();
}
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}
/** Code generation for a array initializer */
public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
// Flatten the values and compute the dimensions, by iterating in depth into nested array
// initializers
int pc = codeStream.position;
int expressionLength = (this.expressions == null) ? 0 : this.expressions.length;
codeStream.generateInlinedValue(expressionLength);
codeStream.newArray(this.binding);
if (this.expressions != null) {
// binding is an ArrayType, so I can just deal with the dimension
int elementsTypeID = this.binding.dimensions > 1 ? -1 : this.binding.leafComponentType.id;
for (int i = 0; i < expressionLength; i++) {
Expression expr;
if ((expr = this.expressions[i]).constant != Constant.NotAConstant) {
switch (elementsTypeID) { // filter out initializations to default values
case T_int:
case T_short:
case T_byte:
case T_char:
case T_long:
if (expr.constant.longValue() != 0) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
break;
case T_float:
case T_double:
double constantValue = expr.constant.doubleValue();
if (constantValue == -0.0 || constantValue != 0) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
break;
case T_boolean:
if (expr.constant.booleanValue() != false) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
break;
default:
if (!(expr instanceof NullLiteral)) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
}
} else if (!(expr instanceof NullLiteral)) {
codeStream.dup();
codeStream.generateInlinedValue(i);
expr.generateCode(currentScope, codeStream, true);
codeStream.arrayAtPut(elementsTypeID, false);
}
}
}
if (valueRequired) {
codeStream.generateImplicitConversion(this.implicitConversion);
} else {
codeStream.pop();
}
codeStream.recordPositionsFrom(pc, this.sourceStart);
}