+/*******************************************************************************
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
+ * All rights reserved. This program and the accompanying materials
+ * are made available under the terms of the Common Public License v1.0
+ * which accompanies this distribution, and is available at
+ * http://www.eclipse.org/legal/cpl-v10.html
+ *
+ * Contributors:
+ * IBM Corporation - initial API and implementation
+ *******************************************************************************/
package net.sourceforge.phpdt.internal.compiler.ast;
-import java.util.List;
+import net.sourceforge.phpdt.internal.compiler.ASTVisitor;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
+import net.sourceforge.phpdt.internal.compiler.impl.Constant;
+import net.sourceforge.phpdt.internal.compiler.lookup.ArrayBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
+import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
-/**
- * a binary expression is a combination of two expressions with an operator.
- *
- * @author Matthieu Casanova
- */
-public final class BinaryExpression extends OperatorExpression {
-
- /** The left expression. */
- private final Expression left;
- /** The right expression. */
- private final Expression right;
-
- /**
- * Create a binary expression.
- *
- * @param left the left expression
- * @param right the right expression
- * @param operator an operator taken in the {@link OperatorExpression} interface
- */
- public BinaryExpression(final Expression left,
- final Expression right,
- final int operator) {
- super(operator, left.sourceStart, right.sourceEnd);
- this.left = left;
- this.right = right;
- }
-
- public String toStringExpression() {
- final String leftString = left.toStringExpression();
- final String operatorString = operatorToString();
- final String rightString = right.toStringExpression();
- final StringBuffer buff = new StringBuffer(leftString.length() + operatorString.length() + rightString.length());
- buff.append(leftString);
- buff.append(operatorString);
- buff.append(rightString);
- return buff.toString();
- }
-
- /**
- * Get the variables from outside (parameters, globals ...)
- *
- * @param list the list where we will put variables
- */
- public void getOutsideVariable(final List list) {}
-
- /**
- * get the modified variables.
- *
- * @param list the list where we will put variables
- */
- public void getModifiedVariable(final List list) {
- left.getModifiedVariable(list);
- right.getModifiedVariable(list);
- }
-
- /**
- * Get the variables used.
- *
- * @param list the list where we will put variables
- */
- public void getUsedVariable(final List list) {
- left.getUsedVariable(list);
- right.getUsedVariable(list);
- }
+public class BinaryExpression extends OperatorExpression {
+
+ public Expression left, right;
+ public Constant optimizedBooleanConstant;
+
+ public BinaryExpression(Expression left, Expression right, int operator) {
+
+ this.left = left;
+ this.right = right;
+ this.bits |= operator << OperatorSHIFT; // encode operator
+ this.sourceStart = left.sourceStart;
+ this.sourceEnd = right.sourceEnd;
+ }
+
+ public FlowInfo analyseCode(
+ BlockScope currentScope,
+ FlowContext flowContext,
+ FlowInfo flowInfo) {
+
+ return right
+ .analyseCode(
+ currentScope,
+ flowContext,
+ left.analyseCode(currentScope, flowContext, flowInfo).unconditionalInits())
+ .unconditionalInits();
+ }
+
+ public void computeConstant(BlockScope scope, int leftId, int rightId) {
+
+ //compute the constant when valid
+ if ((this.left.constant != Constant.NotAConstant)
+ && (this.right.constant != Constant.NotAConstant)) {
+ try {
+ this.constant =
+ Constant.computeConstantOperation(
+ this.left.constant,
+ leftId,
+ (this.bits & OperatorMASK) >> OperatorSHIFT,
+ this.right.constant,
+ rightId);
+ } catch (ArithmeticException e) {
+ this.constant = Constant.NotAConstant;
+ // 1.2 no longer throws an exception at compile-time
+ //scope.problemReporter().compileTimeConstantThrowsArithmeticException(this);
+ }
+ } else {
+ this.constant = Constant.NotAConstant;
+ //add some work for the boolean operators & |
+// this.optimizedBooleanConstant(
+// leftId,
+// (this.bits & OperatorMASK) >> OperatorSHIFT,
+// rightId);
+ }
+ }
+
+ public Constant optimizedBooleanConstant() {
+
+ return this.optimizedBooleanConstant == null ? this.constant : this.optimizedBooleanConstant;
+ }
+
+ /**
+ * Code generation for a binary operation
+ */
+// public void generateCode(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// boolean valueRequired) {
+//
+// int pc = codeStream.position;
+// Label falseLabel, endLabel;
+// if (constant != Constant.NotAConstant) {
+// if (valueRequired)
+// codeStream.generateConstant(constant, implicitConversion);
+// codeStream.recordPositionsFrom(pc, this.sourceStart);
+// return;
+// }
+// bits |= OnlyValueRequiredMASK;
+// switch ((bits & OperatorMASK) >> OperatorSHIFT) {
+// case PLUS :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_String :
+// codeStream.generateStringAppend(currentScope, left, right);
+// if (!valueRequired)
+// codeStream.pop();
+// break;
+// case T_int :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.iadd();
+// break;
+// case T_long :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.ladd();
+// break;
+// case T_double :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.dadd();
+// break;
+// case T_float :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.fadd();
+// break;
+// }
+// break;
+// case MINUS :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.isub();
+// break;
+// case T_long :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.lsub();
+// break;
+// case T_double :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.dsub();
+// break;
+// case T_float :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.fsub();
+// break;
+// }
+// break;
+// case MULTIPLY :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.imul();
+// break;
+// case T_long :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.lmul();
+// break;
+// case T_double :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.dmul();
+// break;
+// case T_float :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.fmul();
+// break;
+// }
+// break;
+// case DIVIDE :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// left.generateCode(currentScope, codeStream, true);
+// right.generateCode(currentScope, codeStream, true);
+// codeStream.idiv();
+// if (!valueRequired)
+// codeStream.pop();
+// break;
+// case T_long :
+// left.generateCode(currentScope, codeStream, true);
+// right.generateCode(currentScope, codeStream, true);
+// codeStream.ldiv();
+// if (!valueRequired)
+// codeStream.pop2();
+// break;
+// case T_double :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.ddiv();
+// break;
+// case T_float :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.fdiv();
+// break;
+// }
+// break;
+// case REMAINDER :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// left.generateCode(currentScope, codeStream, true);
+// right.generateCode(currentScope, codeStream, true);
+// codeStream.irem();
+// if (!valueRequired)
+// codeStream.pop();
+// break;
+// case T_long :
+// left.generateCode(currentScope, codeStream, true);
+// right.generateCode(currentScope, codeStream, true);
+// codeStream.lrem();
+// if (!valueRequired)
+// codeStream.pop2();
+// break;
+// case T_double :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.drem();
+// break;
+// case T_float :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.frem();
+// break;
+// }
+// break;
+// case AND :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// // 0 & x
+// if ((left.constant != Constant.NotAConstant)
+// && (left.constant.typeID() == T_int)
+// && (left.constant.intValue() == 0)) {
+// right.generateCode(currentScope, codeStream, false);
+// if (valueRequired)
+// codeStream.iconst_0();
+// } else {
+// // x & 0
+// if ((right.constant != Constant.NotAConstant)
+// && (right.constant.typeID() == T_int)
+// && (right.constant.intValue() == 0)) {
+// left.generateCode(currentScope, codeStream, false);
+// if (valueRequired)
+// codeStream.iconst_0();
+// } else {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.iand();
+// }
+// }
+// break;
+// case T_long :
+// // 0 & x
+// if ((left.constant != Constant.NotAConstant)
+// && (left.constant.typeID() == T_long)
+// && (left.constant.longValue() == 0L)) {
+// right.generateCode(currentScope, codeStream, false);
+// if (valueRequired)
+// codeStream.lconst_0();
+// } else {
+// // x & 0
+// if ((right.constant != Constant.NotAConstant)
+// && (right.constant.typeID() == T_long)
+// && (right.constant.longValue() == 0L)) {
+// left.generateCode(currentScope, codeStream, false);
+// if (valueRequired)
+// codeStream.lconst_0();
+// } else {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.land();
+// }
+// }
+// break;
+// case T_boolean : // logical and
+// generateOptimizedLogicalAnd(
+// currentScope,
+// codeStream,
+// null,
+// (falseLabel = new Label(codeStream)),
+// valueRequired);
+// /* improving code gen for such a case: boolean b = i < 0 && false;
+// * since the label has never been used, we have the inlined value on the stack. */
+// if (falseLabel.hasForwardReferences()) {
+// if (valueRequired) {
+// codeStream.iconst_1();
+// if ((bits & ValueForReturnMASK) != 0) {
+// codeStream.ireturn();
+// falseLabel.place();
+// codeStream.iconst_0();
+// } else {
+// codeStream.goto_(endLabel = new Label(codeStream));
+// codeStream.decrStackSize(1);
+// falseLabel.place();
+// codeStream.iconst_0();
+// endLabel.place();
+// }
+// } else {
+// falseLabel.place();
+// }
+// }
+// }
+// break;
+// case OR :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// // 0 | x
+// if ((left.constant != Constant.NotAConstant)
+// && (left.constant.typeID() == T_int)
+// && (left.constant.intValue() == 0)) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// // x | 0
+// if ((right.constant != Constant.NotAConstant)
+// && (right.constant.typeID() == T_int)
+// && (right.constant.intValue() == 0)) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.ior();
+// }
+// }
+// break;
+// case T_long :
+// // 0 | x
+// if ((left.constant != Constant.NotAConstant)
+// && (left.constant.typeID() == T_long)
+// && (left.constant.longValue() == 0L)) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// // x | 0
+// if ((right.constant != Constant.NotAConstant)
+// && (right.constant.typeID() == T_long)
+// && (right.constant.longValue() == 0L)) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.lor();
+// }
+// }
+// break;
+// case T_boolean : // logical or
+// generateOptimizedLogicalOr(
+// currentScope,
+// codeStream,
+// null,
+// (falseLabel = new Label(codeStream)),
+// valueRequired);
+// /* 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 (falseLabel.hasForwardReferences()) {
+// if (valueRequired) {
+// codeStream.iconst_1();
+// if ((bits & ValueForReturnMASK) != 0) {
+// codeStream.ireturn();
+// falseLabel.place();
+// codeStream.iconst_0();
+// } else {
+// codeStream.goto_(endLabel = new Label(codeStream));
+// codeStream.decrStackSize(1);
+// falseLabel.place();
+// codeStream.iconst_0();
+// endLabel.place();
+// }
+// } else {
+// falseLabel.place();
+// }
+// }
+// }
+// break;
+// case XOR :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// // 0 ^ x
+// if ((left.constant != Constant.NotAConstant)
+// && (left.constant.typeID() == T_int)
+// && (left.constant.intValue() == 0)) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// // x ^ 0
+// if ((right.constant != Constant.NotAConstant)
+// && (right.constant.typeID() == T_int)
+// && (right.constant.intValue() == 0)) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.ixor();
+// }
+// }
+// break;
+// case T_long :
+// // 0 ^ x
+// if ((left.constant != Constant.NotAConstant)
+// && (left.constant.typeID() == T_long)
+// && (left.constant.longValue() == 0L)) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// // x ^ 0
+// if ((right.constant != Constant.NotAConstant)
+// && (right.constant.typeID() == T_long)
+// && (right.constant.longValue() == 0L)) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.lxor();
+// }
+// }
+// break;
+// case T_boolean :
+// generateOptimizedLogicalXor(
+// currentScope,
+// codeStream,
+// null,
+// (falseLabel = new Label(codeStream)),
+// valueRequired);
+// /* improving code gen for such a case: boolean b = i < 0 ^ bool;
+// * since the label has never been used, we have the inlined value on the stack. */
+// if (falseLabel.hasForwardReferences()) {
+// if (valueRequired) {
+// codeStream.iconst_1();
+// if ((bits & ValueForReturnMASK) != 0) {
+// codeStream.ireturn();
+// falseLabel.place();
+// codeStream.iconst_0();
+// } else {
+// codeStream.goto_(endLabel = new Label(codeStream));
+// codeStream.decrStackSize(1);
+// falseLabel.place();
+// codeStream.iconst_0();
+// endLabel.place();
+// }
+// } else {
+// falseLabel.place();
+// }
+// }
+// }
+// break;
+// case LEFT_SHIFT :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.ishl();
+// break;
+// case T_long :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.lshl();
+// }
+// break;
+// case RIGHT_SHIFT :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.ishr();
+// break;
+// case T_long :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.lshr();
+// }
+// break;
+// case UNSIGNED_RIGHT_SHIFT :
+// switch (bits & ReturnTypeIDMASK) {
+// case T_int :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.iushr();
+// break;
+// case T_long :
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired)
+// codeStream.lushr();
+// }
+// break;
+// case GREATER :
+// generateOptimizedGreaterThan(
+// currentScope,
+// codeStream,
+// null,
+// (falseLabel = new Label(codeStream)),
+// valueRequired);
+// if (valueRequired) {
+// codeStream.iconst_1();
+// if ((bits & ValueForReturnMASK) != 0) {
+// codeStream.ireturn();
+// falseLabel.place();
+// codeStream.iconst_0();
+// } else {
+// codeStream.goto_(endLabel = new Label(codeStream));
+// codeStream.decrStackSize(1);
+// falseLabel.place();
+// codeStream.iconst_0();
+// endLabel.place();
+// }
+// }
+// break;
+// case GREATER_EQUAL :
+// generateOptimizedGreaterThanOrEqual(
+// currentScope,
+// codeStream,
+// null,
+// (falseLabel = new Label(codeStream)),
+// valueRequired);
+// if (valueRequired) {
+// codeStream.iconst_1();
+// if ((bits & ValueForReturnMASK) != 0) {
+// codeStream.ireturn();
+// falseLabel.place();
+// codeStream.iconst_0();
+// } else {
+// codeStream.goto_(endLabel = new Label(codeStream));
+// codeStream.decrStackSize(1);
+// falseLabel.place();
+// codeStream.iconst_0();
+// endLabel.place();
+// }
+// }
+// break;
+// case LESS :
+// generateOptimizedLessThan(
+// currentScope,
+// codeStream,
+// null,
+// (falseLabel = new Label(codeStream)),
+// valueRequired);
+// if (valueRequired) {
+// codeStream.iconst_1();
+// if ((bits & ValueForReturnMASK) != 0) {
+// codeStream.ireturn();
+// falseLabel.place();
+// codeStream.iconst_0();
+// } else {
+// codeStream.goto_(endLabel = new Label(codeStream));
+// codeStream.decrStackSize(1);
+// falseLabel.place();
+// codeStream.iconst_0();
+// endLabel.place();
+// }
+// }
+// break;
+// case LESS_EQUAL :
+// generateOptimizedLessThanOrEqual(
+// currentScope,
+// codeStream,
+// null,
+// (falseLabel = new Label(codeStream)),
+// valueRequired);
+// if (valueRequired) {
+// codeStream.iconst_1();
+// if ((bits & ValueForReturnMASK) != 0) {
+// codeStream.ireturn();
+// falseLabel.place();
+// codeStream.iconst_0();
+// } else {
+// codeStream.goto_(endLabel = new Label(codeStream));
+// codeStream.decrStackSize(1);
+// falseLabel.place();
+// codeStream.iconst_0();
+// endLabel.place();
+// }
+// }
+// }
+// if (valueRequired) {
+// codeStream.generateImplicitConversion(implicitConversion);
+// }
+// codeStream.recordPositionsFrom(pc, this.sourceStart);
+// }
+
+ /**
+ * Boolean operator code generation
+ * Optimized operations are: <, <=, >, >=, &, |, ^
+ */
+// public void generateOptimizedBoolean(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Label trueLabel,
+// Label falseLabel,
+// boolean valueRequired) {
+//
+// if ((constant != Constant.NotAConstant) && (constant.typeID() == T_boolean)) {
+// super.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// return;
+// }
+// switch ((bits & OperatorMASK) >> OperatorSHIFT) {
+// case LESS :
+// generateOptimizedLessThan(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// return;
+// case LESS_EQUAL :
+// generateOptimizedLessThanOrEqual(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// return;
+// case GREATER :
+// generateOptimizedGreaterThan(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// return;
+// case GREATER_EQUAL :
+// generateOptimizedGreaterThanOrEqual(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// return;
+// case AND :
+// generateOptimizedLogicalAnd(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// return;
+// case OR :
+// generateOptimizedLogicalOr(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// return;
+// case XOR :
+// generateOptimizedLogicalXor(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// return;
+// }
+// super.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// }
+//
+// /**
+// * Boolean generation for >
+// */
+// public void generateOptimizedGreaterThan(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Label trueLabel,
+// Label falseLabel,
+// boolean valueRequired) {
+//
+// int promotedTypeID = left.implicitConversion >> 4;
+// // both sides got promoted in the same way
+// if (promotedTypeID == T_int) {
+// // 0 > x
+// if ((left.constant != NotAConstant) && (left.constant.intValue() == 0)) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicitly falling through the FALSE case
+// codeStream.iflt(trueLabel);
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicitly falling through the TRUE case
+// codeStream.ifge(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// // x > 0
+// if ((right.constant != NotAConstant) && (right.constant.intValue() == 0)) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicitly falling through the FALSE case
+// codeStream.ifgt(trueLabel);
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicitly falling through the TRUE case
+// codeStream.ifle(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// }
+// // default comparison
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicit falling through the FALSE case
+// switch (promotedTypeID) {
+// case T_int :
+// codeStream.if_icmpgt(trueLabel);
+// break;
+// case T_float :
+// codeStream.fcmpl();
+// codeStream.ifgt(trueLabel);
+// break;
+// case T_long :
+// codeStream.lcmp();
+// codeStream.ifgt(trueLabel);
+// break;
+// case T_double :
+// codeStream.dcmpl();
+// codeStream.ifgt(trueLabel);
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicit falling through the TRUE case
+// switch (promotedTypeID) {
+// case T_int :
+// codeStream.if_icmple(falseLabel);
+// break;
+// case T_float :
+// codeStream.fcmpl();
+// codeStream.ifle(falseLabel);
+// break;
+// case T_long :
+// codeStream.lcmp();
+// codeStream.ifle(falseLabel);
+// break;
+// case T_double :
+// codeStream.dcmpl();
+// codeStream.ifle(falseLabel);
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// }
+
+ /**
+ * Boolean generation for >=
+ */
+// public void generateOptimizedGreaterThanOrEqual(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Label trueLabel,
+// Label falseLabel,
+// boolean valueRequired) {
+//
+// int promotedTypeID = left.implicitConversion >> 4;
+// // both sides got promoted in the same way
+// if (promotedTypeID == T_int) {
+// // 0 >= x
+// if ((left.constant != NotAConstant) && (left.constant.intValue() == 0)) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicitly falling through the FALSE case
+// codeStream.ifle(trueLabel);
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicitly falling through the TRUE case
+// codeStream.ifgt(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// // x >= 0
+// if ((right.constant != NotAConstant) && (right.constant.intValue() == 0)) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicitly falling through the FALSE case
+// codeStream.ifge(trueLabel);
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicitly falling through the TRUE case
+// codeStream.iflt(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// }
+// // default comparison
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicit falling through the FALSE case
+// switch (promotedTypeID) {
+// case T_int :
+// codeStream.if_icmpge(trueLabel);
+// break;
+// case T_float :
+// codeStream.fcmpl();
+// codeStream.ifge(trueLabel);
+// break;
+// case T_long :
+// codeStream.lcmp();
+// codeStream.ifge(trueLabel);
+// break;
+// case T_double :
+// codeStream.dcmpl();
+// codeStream.ifge(trueLabel);
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicit falling through the TRUE case
+// switch (promotedTypeID) {
+// case T_int :
+// codeStream.if_icmplt(falseLabel);
+// break;
+// case T_float :
+// codeStream.fcmpl();
+// codeStream.iflt(falseLabel);
+// break;
+// case T_long :
+// codeStream.lcmp();
+// codeStream.iflt(falseLabel);
+// break;
+// case T_double :
+// codeStream.dcmpl();
+// codeStream.iflt(falseLabel);
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// }
+//
+// /**
+// * Boolean generation for <
+// */
+// public void generateOptimizedLessThan(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Label trueLabel,
+// Label falseLabel,
+// boolean valueRequired) {
+//
+// int promotedTypeID = left.implicitConversion >> 4;
+// // both sides got promoted in the same way
+// if (promotedTypeID == T_int) {
+// // 0 < x
+// if ((left.constant != NotAConstant) && (left.constant.intValue() == 0)) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicitly falling through the FALSE case
+// codeStream.ifgt(trueLabel);
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicitly falling through the TRUE case
+// codeStream.ifle(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// // x < 0
+// if ((right.constant != NotAConstant) && (right.constant.intValue() == 0)) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicitly falling through the FALSE case
+// codeStream.iflt(trueLabel);
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicitly falling through the TRUE case
+// codeStream.ifge(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// }
+// // default comparison
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicit falling through the FALSE case
+// switch (promotedTypeID) {
+// case T_int :
+// codeStream.if_icmplt(trueLabel);
+// break;
+// case T_float :
+// codeStream.fcmpg();
+// codeStream.iflt(trueLabel);
+// break;
+// case T_long :
+// codeStream.lcmp();
+// codeStream.iflt(trueLabel);
+// break;
+// case T_double :
+// codeStream.dcmpg();
+// codeStream.iflt(trueLabel);
+// }
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicit falling through the TRUE case
+// switch (promotedTypeID) {
+// case T_int :
+// codeStream.if_icmpge(falseLabel);
+// break;
+// case T_float :
+// codeStream.fcmpg();
+// codeStream.ifge(falseLabel);
+// break;
+// case T_long :
+// codeStream.lcmp();
+// codeStream.ifge(falseLabel);
+// break;
+// case T_double :
+// codeStream.dcmpg();
+// codeStream.ifge(falseLabel);
+// }
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// }
+//
+// /**
+// * Boolean generation for <=
+// */
+// public void generateOptimizedLessThanOrEqual(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Label trueLabel,
+// Label falseLabel,
+// boolean valueRequired) {
+//
+// int promotedTypeID = left.implicitConversion >> 4;
+// // both sides got promoted in the same way
+// if (promotedTypeID == T_int) {
+// // 0 <= x
+// if ((left.constant != NotAConstant) && (left.constant.intValue() == 0)) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicitly falling through the FALSE case
+// codeStream.ifge(trueLabel);
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicitly falling through the TRUE case
+// codeStream.iflt(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// // x <= 0
+// if ((right.constant != NotAConstant) && (right.constant.intValue() == 0)) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicitly falling through the FALSE case
+// codeStream.ifle(trueLabel);
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicitly falling through the TRUE case
+// codeStream.ifgt(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// }
+// // default comparison
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicit falling through the FALSE case
+// switch (promotedTypeID) {
+// case T_int :
+// codeStream.if_icmple(trueLabel);
+// break;
+// case T_float :
+// codeStream.fcmpg();
+// codeStream.ifle(trueLabel);
+// break;
+// case T_long :
+// codeStream.lcmp();
+// codeStream.ifle(trueLabel);
+// break;
+// case T_double :
+// codeStream.dcmpg();
+// codeStream.ifle(trueLabel);
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// }
+// } else {
+// if (trueLabel == null) {
+// // implicit falling through the TRUE case
+// switch (promotedTypeID) {
+// case T_int :
+// codeStream.if_icmpgt(falseLabel);
+// break;
+// case T_float :
+// codeStream.fcmpg();
+// codeStream.ifgt(falseLabel);
+// break;
+// case T_long :
+// codeStream.lcmp();
+// codeStream.ifgt(falseLabel);
+// break;
+// case T_double :
+// codeStream.dcmpg();
+// codeStream.ifgt(falseLabel);
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// return;
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// }
+//
+// /**
+// * Boolean generation for &
+// */
+// public void generateOptimizedLogicalAnd(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Label trueLabel,
+// Label falseLabel,
+// boolean valueRequired) {
+//
+// Constant condConst;
+// if ((left.implicitConversion & 0xF) == T_boolean) {
+// if ((condConst = left.optimizedBooleanConstant()) != NotAConstant) {
+// if (condConst.booleanValue() == true) {
+// // <something equivalent to true> & x
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// }
+// } else {
+// // <something equivalent to false> & x
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// if (valueRequired) {
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// codeStream.iconst_0();
+// } else {
+// if (falseLabel != null) {
+// // implicit falling through the TRUE case
+// codeStream.goto_(falseLabel);
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// }
+// return;
+// }
+// if ((condConst = right.optimizedBooleanConstant()) != NotAConstant) {
+// if (condConst.booleanValue() == true) {
+// // x & <something equivalent to true>
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// }
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// } else {
+// // x & <something equivalent to false>
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// if (valueRequired) {
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// codeStream.iconst_0();
+// } else {
+// if (falseLabel != null) {
+// // implicit falling through the TRUE case
+// codeStream.goto_(falseLabel);
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// }
+// return;
+// }
+// }
+// // default case
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// codeStream.iand();
+// if ((bits & OnlyValueRequiredMASK) == 0) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicit falling through the FALSE case
+// codeStream.ifne(trueLabel);
+// }
+// } else {
+// // implicit falling through the TRUE case
+// if (trueLabel == null) {
+// codeStream.ifeq(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// }
+//
+// /**
+// * Boolean generation for |
+// */
+// public void generateOptimizedLogicalOr(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Label trueLabel,
+// Label falseLabel,
+// boolean valueRequired) {
+//
+// Constant condConst;
+// if ((left.implicitConversion & 0xF) == T_boolean) {
+// if ((condConst = left.optimizedBooleanConstant()) != NotAConstant) {
+// if (condConst.booleanValue() == true) {
+// // <something equivalent to true> | x
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// if (valueRequired) {
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// codeStream.iconst_1();
+// } else {
+// if (trueLabel != null) {
+// codeStream.goto_(trueLabel);
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// } else {
+// // <something equivalent to false> | x
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// }
+// }
+// return;
+// }
+// if ((condConst = right.optimizedBooleanConstant()) != NotAConstant) {
+// if (condConst.booleanValue() == true) {
+// // x | <something equivalent to true>
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// if (valueRequired) {
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// codeStream.iconst_1();
+// } else {
+// if (trueLabel != null) {
+// codeStream.goto_(trueLabel);
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// } else {
+// // x | <something equivalent to false>
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// }
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// }
+// return;
+// }
+// }
+// // default case
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// codeStream.ior();
+// if ((bits & OnlyValueRequiredMASK) == 0) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicit falling through the FALSE case
+// codeStream.ifne(trueLabel);
+// }
+// } else {
+// // implicit falling through the TRUE case
+// if (trueLabel == null) {
+// codeStream.ifeq(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// }
+//
+// /**
+// * Boolean generation for ^
+// */
+// public void generateOptimizedLogicalXor(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Label trueLabel,
+// Label falseLabel,
+// boolean valueRequired) {
+//
+// Constant condConst;
+// if ((left.implicitConversion & 0xF) == T_boolean) {
+// if ((condConst = left.optimizedBooleanConstant()) != NotAConstant) {
+// if (condConst.booleanValue() == true) {
+// // <something equivalent to true> ^ x
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// falseLabel,
+// trueLabel,
+// valueRequired);
+// } else {
+// // <something equivalent to false> ^ x
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// right.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// }
+// }
+// return;
+// }
+// if ((condConst = right.optimizedBooleanConstant()) != NotAConstant) {
+// if (condConst.booleanValue() == true) {
+// // x ^ <something equivalent to true>
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// falseLabel,
+// trueLabel,
+// valueRequired);
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// } else {
+// // x ^ <something equivalent to false>
+// if ((bits & OnlyValueRequiredMASK) != 0) {
+// left.generateCode(currentScope, codeStream, valueRequired);
+// } else {
+// left.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// valueRequired);
+// }
+// right.generateOptimizedBoolean(
+// currentScope,
+// codeStream,
+// trueLabel,
+// falseLabel,
+// false);
+// }
+// return;
+// }
+// }
+// // default case
+// left.generateCode(currentScope, codeStream, valueRequired);
+// right.generateCode(currentScope, codeStream, valueRequired);
+// if (valueRequired) {
+// codeStream.ixor();
+// if ((bits & OnlyValueRequiredMASK) == 0) {
+// if (falseLabel == null) {
+// if (trueLabel != null) {
+// // implicit falling through the FALSE case
+// codeStream.ifne(trueLabel);
+// }
+// } else {
+// // implicit falling through the TRUE case
+// if (trueLabel == null) {
+// codeStream.ifeq(falseLabel);
+// } else {
+// // no implicit fall through TRUE/FALSE --> should never occur
+// }
+// }
+// }
+// }
+// // reposition the endPC
+// codeStream.updateLastRecordedEndPC(codeStream.position);
+// }
+//
+// public void generateOptimizedStringBuffer(
+// BlockScope blockScope,
+// CodeStream codeStream,
+// int typeID) {
+//
+// /* In the case trying to make a string concatenation, there is no need to create a new
+// * string buffer, thus use a lower-level API for code generation involving only the
+// * appending of arguments to the existing StringBuffer
+// */
+//
+// if ((((bits & OperatorMASK) >> OperatorSHIFT) == PLUS)
+// && ((bits & ReturnTypeIDMASK) == T_String)) {
+// if (constant != NotAConstant) {
+// codeStream.generateConstant(constant, implicitConversion);
+// codeStream.invokeStringBufferAppendForType(implicitConversion & 0xF);
+// } else {
+// int pc = codeStream.position;
+// left.generateOptimizedStringBuffer(
+// blockScope,
+// codeStream,
+// left.implicitConversion & 0xF);
+// codeStream.recordPositionsFrom(pc, left.sourceStart);
+// pc = codeStream.position;
+// right.generateOptimizedStringBuffer(
+// blockScope,
+// codeStream,
+// right.implicitConversion & 0xF);
+// codeStream.recordPositionsFrom(pc, right.sourceStart);
+// }
+// } else {
+// super.generateOptimizedStringBuffer(blockScope, codeStream, typeID);
+// }
+// }
+//
+// public void generateOptimizedStringBufferCreation(
+// BlockScope blockScope,
+// CodeStream codeStream,
+// int typeID) {
+//
+// /* In the case trying to make a string concatenation, there is no need to create a new
+// * string buffer, thus use a lower-level API for code generation involving only the
+// * appending of arguments to the existing StringBuffer
+// */
+//
+// if ((((bits & OperatorMASK) >> OperatorSHIFT) == PLUS)
+// && ((bits & ReturnTypeIDMASK) == T_String)) {
+// if (constant != NotAConstant) {
+// codeStream.newStringBuffer(); // new: java.lang.StringBuffer
+// codeStream.dup();
+// codeStream.ldc(constant.stringValue());
+// codeStream.invokeStringBufferStringConstructor();
+// // invokespecial: java.lang.StringBuffer.<init>(Ljava.lang.String;)V
+// } else {
+// int pc = codeStream.position;
+// left.generateOptimizedStringBufferCreation(
+// blockScope,
+// codeStream,
+// left.implicitConversion & 0xF);
+// codeStream.recordPositionsFrom(pc, left.sourceStart);
+// pc = codeStream.position;
+// right.generateOptimizedStringBuffer(
+// blockScope,
+// codeStream,
+// right.implicitConversion & 0xF);
+// codeStream.recordPositionsFrom(pc, right.sourceStart);
+// }
+// } else {
+// super.generateOptimizedStringBufferCreation(blockScope, codeStream, typeID);
+// }
+// }
+//
+// public boolean isCompactableOperation() {
+//
+// return true;
+// }
+//
+// public void optimizedBooleanConstant(int leftId, int operator, int rightId) {
+//
+// switch (operator) {
+// case AND :
+// if ((leftId != T_boolean) || (rightId != T_boolean))
+// return;
+// case AND_AND :
+// Constant cst;
+// if ((cst = left.optimizedBooleanConstant()) != NotAConstant) {
+// if (cst.booleanValue() == false) { // left is equivalent to false
+// optimizedBooleanConstant = cst; // constant(false)
+// return;
+// } else { //left is equivalent to true
+// if ((cst = right.optimizedBooleanConstant()) != NotAConstant) {
+// optimizedBooleanConstant = cst;
+// // the conditional result is equivalent to the right conditional value
+// }
+// return;
+// }
+// }
+// if ((cst = right.optimizedBooleanConstant()) != NotAConstant) {
+// if (cst.booleanValue() == false) { // right is equivalent to false
+// optimizedBooleanConstant = cst; // constant(false)
+// }
+// }
+// return;
+// case OR :
+// if ((leftId != T_boolean) || (rightId != T_boolean))
+// return;
+// case OR_OR :
+// if ((cst = left.optimizedBooleanConstant()) != NotAConstant) {
+// if (cst.booleanValue() == true) { // left is equivalent to true
+// optimizedBooleanConstant = cst; // constant(true)
+// return;
+// } else { //left is equivalent to false
+// if ((cst = right.optimizedBooleanConstant()) != NotAConstant) {
+// optimizedBooleanConstant = cst;
+// }
+// return;
+// }
+// }
+// if ((cst = right.optimizedBooleanConstant()) != NotAConstant) {
+// if (cst.booleanValue() == true) { // right is equivalent to true
+// optimizedBooleanConstant = cst; // constant(true)
+// }
+// }
+// }
+// }
+ public StringBuffer printExpressionNoParenthesis(int indent, StringBuffer output) {
+
+ left.printExpression(indent, output).append(' ').append(operatorToString()).append(' ');
+ return right.printExpression(0, output);
+ }
+ public TypeBinding resolveType(BlockScope scope) {
+
+ // use the id of the type to navigate into the table
+ TypeBinding leftTb = left.resolveType(scope);
+ TypeBinding rightTb = right.resolveType(scope);
+ if (leftTb == null || rightTb == null) {
+ constant = Constant.NotAConstant;
+ return null;
+ }
+ int leftId = leftTb.id;
+ int rightId = rightTb.id;
+ if (leftId > 15
+ || rightId > 15) { // must convert String + Object || Object + String
+ if (leftId == T_String) {
+ rightId = T_Object;
+ } else if (rightId == T_String) {
+ leftId = T_Object;
+ } else {
+ constant = Constant.NotAConstant;
+ scope.problemReporter().invalidOperator(this, leftTb, rightTb);
+ return null;
+ }
+ }
+ if (((bits & OperatorMASK) >> OperatorSHIFT) == PLUS) {
+ if (leftId == T_String
+ && rightTb.isArrayType()
+ && ((ArrayBinding) rightTb).elementsType(scope) == CharBinding)
+ scope.problemReporter().signalNoImplicitStringConversionForCharArrayExpression(
+ right);
+ else if (
+ rightId == T_String
+ && leftTb.isArrayType()
+ && ((ArrayBinding) leftTb).elementsType(scope) == CharBinding)
+ scope.problemReporter().signalNoImplicitStringConversionForCharArrayExpression(
+ left);
+ }
+
+ // the code is an int
+ // (cast) left Op (cast) rigth --> result
+ // 0000 0000 0000 0000 0000
+ // <<16 <<12 <<8 <<4 <<0
+
+ // Don't test for result = 0. If it is zero, some more work is done.
+ // On the one hand when it is not zero (correct code) we avoid doing the test
+ int result =
+ ResolveTypeTables[(bits & OperatorMASK) >> OperatorSHIFT][(leftId << 4)
+ + rightId];
+ left.implicitConversion = result >>> 12;
+ right.implicitConversion = (result >>> 4) & 0x000FF;
+
+ bits |= result & 0xF;
+ switch (result & 0xF) { // record the current ReturnTypeID
+ // only switch on possible result type.....
+ case T_boolean :
+ this.resolvedType = BooleanBinding;
+ break;
+ case T_byte :
+ this.resolvedType = ByteBinding;
+ break;
+ case T_char :
+ this.resolvedType = CharBinding;
+ break;
+ case T_double :
+ this.resolvedType = DoubleBinding;
+ break;
+ case T_float :
+ this.resolvedType = FloatBinding;
+ break;
+ case T_int :
+ this.resolvedType = IntBinding;
+ break;
+ case T_long :
+ this.resolvedType = LongBinding;
+ break;
+ case T_String :
+ this.resolvedType = scope.getJavaLangString();
+ break;
+ default : //error........
+ constant = Constant.NotAConstant;
+ scope.problemReporter().invalidOperator(this, leftTb, rightTb);
+ return null;
+ }
+
+ // compute the constant when valid
+ computeConstant(scope, leftId, rightId);
+ return this.resolvedType;
+ }
+
+ public String toStringExpressionNoParenthesis() {
+
+ return left.toStringExpression() + " " + //$NON-NLS-1$
+ operatorToString() + " " + //$NON-NLS-1$
+ right.toStringExpression();
+ }
+ public void traverse(ASTVisitor visitor, BlockScope scope) {
+
+ if (visitor.visit(this, scope)) {
+ left.traverse(visitor, scope);
+ right.traverse(visitor, scope);
+ }
+ visitor.endVisit(this, scope);
+ }
}
git://git.phpeclipse.com / phpeclipse.git / blobdiff