implement rdar://6780761, making sema reject some code that otherwise
crashes codegen. llvm-svn: 68891
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@ -1190,6 +1190,11 @@ def err_typecheck_call_too_many_args : Error<
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def warn_call_wrong_number_of_arguments : Warning<
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"too %select{few|many}0 arguments in call to %1">;
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def err_deleted_function_use : Error<"attempt to use a deleted function">;
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def err_cannot_pass_objc_interface_to_vararg : Error<
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"cannot pass object with interface type %0 by-value through variadic "
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"%select{function|block|method}1">;
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def warn_cannot_pass_non_pod_arg_to_vararg : Warning<
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"cannot pass object of non-POD type %0 through variadic "
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"%select{function|block|method}1; call will abort at runtime">;
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@ -2210,7 +2210,7 @@ public:
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// DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but
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// will warn if the resulting type is not a POD type.
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void DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT);
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bool DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT);
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// UsualArithmeticConversions - performs the UsualUnaryConversions on it's
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// operands and then handles various conversions that are common to binary
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@ -154,16 +154,25 @@ void Sema::DefaultArgumentPromotion(Expr *&Expr) {
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UsualUnaryConversions(Expr);
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}
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// DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but
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// will warn if the resulting type is not a POD type.
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void Sema::DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT) {
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/// DefaultVariadicArgumentPromotion - Like DefaultArgumentPromotion, but
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/// will warn if the resulting type is not a POD type, and rejects ObjC
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/// interfaces passed by value. This returns true if the argument type is
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/// completely illegal.
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bool Sema::DefaultVariadicArgumentPromotion(Expr *&Expr, VariadicCallType CT) {
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DefaultArgumentPromotion(Expr);
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if (!Expr->getType()->isPODType()) {
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Diag(Expr->getLocStart(),
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diag::warn_cannot_pass_non_pod_arg_to_vararg) <<
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Expr->getType() << CT;
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if (Expr->getType()->isObjCInterfaceType()) {
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Diag(Expr->getLocStart(),
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diag::err_cannot_pass_objc_interface_to_vararg)
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<< Expr->getType() << CT;
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return true;
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}
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if (!Expr->getType()->isPODType())
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Diag(Expr->getLocStart(), diag::warn_cannot_pass_non_pod_arg_to_vararg)
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<< Expr->getType() << CT;
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return false;
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}
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@ -2223,7 +2232,7 @@ Sema::ConvertArgumentsForCall(CallExpr *Call, Expr *Fn,
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// Promote the arguments (C99 6.5.2.2p7).
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for (unsigned i = NumArgsInProto; i != NumArgs; i++) {
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Expr *Arg = Args[i];
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DefaultVariadicArgumentPromotion(Arg, CallType);
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Invalid |= DefaultVariadicArgumentPromotion(Arg, CallType);
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Call->setArg(i, Arg);
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}
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}
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@ -164,7 +164,7 @@ bool Sema::CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs,
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unsigned NumNamedArgs = Sel.getNumArgs();
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assert(NumArgs >= NumNamedArgs && "Too few arguments for selector!");
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bool anyIncompatibleArgs = false;
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bool IsError = false;
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for (unsigned i = 0; i < NumNamedArgs; i++) {
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Expr *argExpr = Args[i];
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assert(argExpr && "CheckMessageArgumentTypes(): missing expression");
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@ -183,7 +183,7 @@ bool Sema::CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs,
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if (Args[i] != argExpr) // The expression was converted.
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Args[i] = argExpr; // Make sure we store the converted expression.
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anyIncompatibleArgs |=
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IsError |=
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DiagnoseAssignmentResult(Result, argExpr->getLocStart(), lhsType, rhsType,
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argExpr, "sending");
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}
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@ -191,7 +191,7 @@ bool Sema::CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs,
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// Promote additional arguments to variadic methods.
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if (Method->isVariadic()) {
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for (unsigned i = NumNamedArgs; i < NumArgs; ++i)
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DefaultVariadicArgumentPromotion(Args[i], VariadicMethod);
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IsError |= DefaultVariadicArgumentPromotion(Args[i], VariadicMethod);
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} else {
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// Check for extra arguments to non-variadic methods.
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if (NumArgs != NumNamedArgs) {
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@ -203,7 +203,7 @@ bool Sema::CheckMessageArgumentTypes(Expr **Args, unsigned NumArgs,
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}
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}
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return anyIncompatibleArgs;
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return IsError;
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}
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bool Sema::isSelfExpr(Expr *RExpr) {
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@ -4178,11 +4178,13 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Object,
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else if (NumArgs > NumArgsInProto)
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NumArgsToCheck = NumArgsInProto;
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bool IsError = false;
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// Initialize the implicit object parameter.
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if (PerformObjectArgumentInitialization(Object, Method))
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return true;
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IsError |= PerformObjectArgumentInitialization(Object, Method);
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TheCall->setArg(0, Object);
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// Check the argument types.
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for (unsigned i = 0; i != NumArgsToCheck; i++) {
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Expr *Arg;
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@ -4191,8 +4193,7 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Object,
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// Pass the argument.
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QualType ProtoArgType = Proto->getArgType(i);
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if (PerformCopyInitialization(Arg, ProtoArgType, "passing"))
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return true;
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IsError |= PerformCopyInitialization(Arg, ProtoArgType, "passing");
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} else {
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Arg = new (Context) CXXDefaultArgExpr(Method->getParamDecl(i));
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}
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@ -4205,12 +4206,13 @@ Sema::BuildCallToObjectOfClassType(Scope *S, Expr *Object,
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// Promote the arguments (C99 6.5.2.2p7).
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for (unsigned i = NumArgsInProto; i != NumArgs; i++) {
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Expr *Arg = Args[i];
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DefaultVariadicArgumentPromotion(Arg, VariadicMethod);
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IsError |= DefaultVariadicArgumentPromotion(Arg, VariadicMethod);
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TheCall->setArg(i + 1, Arg);
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}
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}
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if (IsError) return true;
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return CheckFunctionCall(Method, TheCall.take()).release();
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}
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@ -22,3 +22,9 @@
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void somefunc(foo x) {} // expected-error {{Objective-C interface type 'foo' cannot be passed by value}}
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foo somefunc2() {} // expected-error {{Objective-C interface type 'foo' cannot be returned by value}}
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// rdar://6780761
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void f0(foo *a0) {
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extern void g0(int x, ...);
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g0(1, *(foo*)0); // expected-error {{cannot pass object with interface type 'foo' by-value through variadic function}}
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}
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