private Statement ParseUnaryConditionalBranch(IOperation currentOperation) { Expression condition = this.PopOperandStack(); var castIfPossible = condition as CastIfPossible; if (castIfPossible != null) { condition = new CheckIfInstance() { Locations = castIfPossible.Locations, Operand = castIfPossible.ValueToCast, TypeToCheck = castIfPossible.TargetType, }; } else if (condition.Type != Dummy.TypeReference && condition.Type.TypeCode != PrimitiveTypeCode.Boolean) { var defaultValue = new DefaultValue() { DefaultValueType = condition.Type, Type = condition.Type }; condition = new NotEquality() { LeftOperand = condition, RightOperand = defaultValue }; } condition.Type = this.platformType.SystemBoolean; GotoStatement gotoStatement = MakeGoto(currentOperation); ConditionalStatement ifStatement = new ConditionalStatement(); ifStatement.Condition = condition; switch (currentOperation.OperationCode) { case OperationCode.Brfalse: case OperationCode.Brfalse_S: ifStatement.TrueBranch = new EmptyStatement(); ifStatement.FalseBranch = gotoStatement; break; case OperationCode.Brtrue: case OperationCode.Brtrue_S: default: ifStatement.TrueBranch = gotoStatement; ifStatement.FalseBranch = new EmptyStatement(); break; } return ifStatement; }
/// <summary> /// Visits the specified default value. /// </summary> /// <param name="defaultValue">The default value.</param> public override void Visit(IDefaultValue defaultValue) { DefaultValue mutableDefaultValue = new DefaultValue(defaultValue); this.resultExpression = this.myCodeCopier.DeepCopy(mutableDefaultValue); }
/// <summary> /// Visits the specified default value. /// </summary> /// <param name="defaultValue">The default value.</param> /// <returns></returns> protected virtual IExpression DeepCopy(DefaultValue defaultValue) { defaultValue.DefaultValueType = Substitute(defaultValue.DefaultValueType); defaultValue.Type = this.Substitute(defaultValue.Type); return defaultValue; }
private static IExpression ConvertToBoolean(IExpression expression) { Contract.Requires(expression != null); Contract.Ensures(Contract.Result<IExpression>() != null); IPlatformType platformType = expression.Type.PlatformType; var cc = expression as CompileTimeConstant; if (cc != null && TypeHelper.IsPrimitiveInteger(cc.Type)) { cc.Value = !ExpressionHelper.IsIntegralZero(cc); cc.Type = platformType.SystemBoolean; return cc; } var conditional = expression as Conditional; if (conditional != null) { conditional.ResultIfTrue = ConvertToBoolean(conditional.ResultIfTrue); conditional.ResultIfFalse = ConvertToBoolean(conditional.ResultIfFalse); conditional.Type = platformType.SystemBoolean; return conditional; } object/*?*/ val = null; ITypeReference type = platformType.SystemObject; ITypeReference expressionType = expression.Type; IExpression rightOperand = null; // zero or null, but has to be type-specific switch (expressionType.TypeCode) { case PrimitiveTypeCode.Boolean: { var addrDeref = expression as AddressDereference; Conversion conversion; IManagedPointerTypeReference mgdPtr; if (addrDeref != null && (conversion = addrDeref.Address as Conversion) != null && (mgdPtr = conversion.ValueToConvert.Type as IManagedPointerTypeReference) != null) { expressionType = mgdPtr.TargetType; addrDeref.Address = conversion.ValueToConvert; addrDeref.Type = expressionType; expression = addrDeref; goto default; } return expression; } case PrimitiveTypeCode.Char: val = (char)0; type = platformType.SystemChar; break; case PrimitiveTypeCode.Float32: val = (float)0; type = platformType.SystemFloat32; break; case PrimitiveTypeCode.Float64: val = (double)0; type = platformType.SystemFloat64; break; case PrimitiveTypeCode.Int16: val = (short)0; type = platformType.SystemInt16; break; case PrimitiveTypeCode.Int32: val = (int)0; type = platformType.SystemInt32; break; case PrimitiveTypeCode.Int64: val = (long)0; type = platformType.SystemInt64; break; case PrimitiveTypeCode.Int8: val = (sbyte)0; type = platformType.SystemInt8; break; case PrimitiveTypeCode.IntPtr: val = IntPtr.Zero; type = platformType.SystemIntPtr; break; case PrimitiveTypeCode.UInt16: val = (ushort)0; type = platformType.SystemUInt16; break; case PrimitiveTypeCode.UInt32: val = (uint)0; type = platformType.SystemUInt32; break; case PrimitiveTypeCode.UInt64: val = (ulong)0; type = platformType.SystemUInt64; break; case PrimitiveTypeCode.UInt8: val = (byte)0; type = platformType.SystemUInt8; break; case PrimitiveTypeCode.UIntPtr: val = UIntPtr.Zero; type = platformType.SystemUIntPtr; break; default: rightOperand = new DefaultValue() { DefaultValueType = expressionType, Type = expressionType, }; break; } if (rightOperand == null) { rightOperand = new CompileTimeConstant() { Value = val, Type = type, }; } NotEquality result = new NotEquality() { LeftOperand = expression, RightOperand = rightOperand, Type = platformType.SystemBoolean, }; return result; }
/// <summary> /// If the local declaration has an initial value, then generate the /// statement "loc := e" from it. /// Special case: if "loc" is a struct, then treat it as a call to /// the default ctor. /// Otherwise ignore it. /// </summary> public override void TraverseChildren(ILocalDeclarationStatement localDeclarationStatement) { var initVal = localDeclarationStatement.InitialValue; var typ = localDeclarationStatement.LocalVariable.Type; var isStruct = TranslationHelper.IsStruct(typ); if (initVal == null && !isStruct) return; var boogieLocal = this.sink.FindOrCreateLocalVariable(localDeclarationStatement.LocalVariable); var boogieLocalExpr = Bpl.Expr.Ident(boogieLocal); var tok = localDeclarationStatement.Token(); Bpl.Expr e = null; var structCopy = isStruct && initVal != null && !(initVal is IDefaultValue); // then a struct value of type S is being assigned: "lhs := s" // model this as the statement "call lhs := S..#copy_ctor(s)" that does the bit-wise copying if (isStruct) { if (!structCopy) { var defaultValue = new DefaultValue() { DefaultValueType = typ, Locations = new List<ILocation>(localDeclarationStatement.Locations), Type = typ, }; var e2 = ExpressionFor(defaultValue); StmtBuilder.Add(Bpl.Cmd.SimpleAssign(tok, boogieLocalExpr, e2)); } else /*if (structCopy) */{ var proc = this.sink.FindOrCreateProcedureForStructCopy(typ); e = ExpressionFor(initVal); StmtBuilder.Add(new Bpl.CallCmd(tok, proc.Name, new List<Bpl.Expr> { e, }, new List<Bpl.IdentifierExpr>{ boogieLocalExpr, })); } } else { e = ExpressionFor(initVal); StmtBuilder.Add(Bpl.Cmd.SimpleAssign(tok, boogieLocalExpr, e)); } return; }
/// <summary> /// Rewrites the children of the given defalut value expression. /// </summary> public virtual void RewriteChildren(DefaultValue defaultValue) { this.RewriteChildren((Expression)defaultValue); defaultValue.DefaultValueType = this.Rewrite(defaultValue.DefaultValueType); }
/// <summary> /// Visits the specified default value. /// </summary> /// <param name="defaultValue">The default value.</param> /// <returns></returns> public virtual IExpression Visit(DefaultValue defaultValue) { defaultValue.DefaultValueType = Visit(defaultValue.DefaultValueType); defaultValue.Type = this.Visit(defaultValue.Type); return defaultValue; }
/// <summary> /// Visits the specified default value. /// </summary> /// <param name="defaultValue">The default value.</param> public override void Visit(IDefaultValue defaultValue) { DefaultValue mutableDefaultValue = defaultValue as DefaultValue; if (alwaysMakeACopy || mutableDefaultValue == null) mutableDefaultValue = new DefaultValue(defaultValue); this.resultExpression = this.myCodeMutator.Visit(mutableDefaultValue); }