/// <summary> /// Generates CIL for the statement. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> public override void GenerateCode(ILGenerator generator, OptimizationInfo optimizationInfo) { // Generate code for the start of the statement. var statementLocals = new StatementLocals(); GenerateStartOfStatement(generator, optimizationInfo, statementLocals); // Emit the return value. if (this.Value == null) { EmitHelpers.EmitUndefined(generator); } else { this.Value.GenerateCode(generator, optimizationInfo); EmitConversion.ToAny(generator, this.Value.ResultType); } // Determine if this is the last statement in the function. bool lastStatement = optimizationInfo.AbstractSyntaxTree is BlockStatement && ((BlockStatement)optimizationInfo.AbstractSyntaxTree).Statements.Count > 0 && ((BlockStatement)optimizationInfo.AbstractSyntaxTree).Statements[((BlockStatement)optimizationInfo.AbstractSyntaxTree).Statements.Count - 1] == this; // The first return statement initializes the variable that holds the return value. if (optimizationInfo.ReturnVariable == null) { optimizationInfo.ReturnVariable = generator.DeclareVariable(typeof(object), "returnValue"); } // Store the return value in a variable. generator.StoreVariable(optimizationInfo.ReturnVariable); // There is no need to jump to the end of the function if this is the last statement. if (lastStatement == false) { // The first return statement that needs to branch creates the return label. This is // defined in FunctionmethodGenerator.GenerateCode() at the end of the function. if (optimizationInfo.ReturnTarget == null) { optimizationInfo.ReturnTarget = generator.CreateLabel(); } // Branch to the end of the function. Note: the return statement might be branching // from inside a try { } or finally { } block to outside. EmitLongJump() handles this. optimizationInfo.EmitLongJump(generator, optimizationInfo.ReturnTarget); } // Generate code for the end of the statement. GenerateEndOfStatement(generator, optimizationInfo, statementLocals); }
/// <summary> /// Generates CIL for the statement. /// </summary> /// <param name="generator"> The generator to output the CIL to. </param> /// <param name="optimizationInfo"> Information about any optimizations that should be performed. </param> public override void GenerateCode(ILGenerator generator, OptimizationInfo optimizationInfo) { // Generate code for the start of the statement. var statementLocals = new StatementLocals(); GenerateStartOfStatement(generator, optimizationInfo, statementLocals); // Emit an unconditional branch. // Note: the continue statement might be branching from inside a try { } or finally { } // block to outside. EmitLongJump() handles this. optimizationInfo.EmitLongJump(generator, optimizationInfo.GetContinueTarget(this.Label)); // Generate code for the end of the statement. GenerateEndOfStatement(generator, optimizationInfo, statementLocals); }