forked from OSchip/llvm-project
338 lines
15 KiB
C++
338 lines
15 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -triple %itanium_abi_triple -verify -Wreinterpret-base-class -Wno-unused-volatile-lvalue %s
|
|
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -triple %ms_abi_triple -DMSABI -verify -Wreinterpret-base-class -Wno-unused-volatile-lvalue %s
|
|
|
|
// RUN: not %clang_cc1 -std=c++11 -fsyntax-only -triple %itanium_abi_triple -fdiagnostics-parseable-fixits -Wreinterpret-base-class -Wno-unused-volatile-lvalue %s 2>&1 | FileCheck %s
|
|
// RUN: not %clang_cc1 -std=c++11 -fsyntax-only -triple %ms_abi_triple -fdiagnostics-parseable-fixits -Wreinterpret-base-class -Wno-unused-volatile-lvalue %s 2>&1 | FileCheck %s
|
|
|
|
// PR 13824
|
|
class A {
|
|
};
|
|
class DA : public A {
|
|
};
|
|
class DDA : public DA {
|
|
};
|
|
class DAo : protected A {
|
|
};
|
|
class DAi : private A {
|
|
};
|
|
|
|
class DVA : public virtual A {
|
|
};
|
|
class DDVA : public virtual DA {
|
|
};
|
|
class DMA : public virtual A, public virtual DA { //expected-warning{{direct base 'A' is inaccessible due to ambiguity:\n class DMA -> class A\n class DMA -> class DA -> class A}}
|
|
};
|
|
|
|
class B;
|
|
|
|
struct C {
|
|
// Do not fail on incompletely-defined classes.
|
|
decltype(reinterpret_cast<C *>(0)) foo;
|
|
decltype(reinterpret_cast<A *>((C *) 0)) bar;
|
|
decltype(reinterpret_cast<C *>((A *) 0)) baz;
|
|
};
|
|
|
|
void reinterpret_not_defined_class(B *b, C *c) {
|
|
// Should not fail if class has no definition.
|
|
(void)*reinterpret_cast<C *>(b);
|
|
(void)*reinterpret_cast<B *>(c);
|
|
|
|
(void)reinterpret_cast<C &>(*b);
|
|
(void)reinterpret_cast<B &>(*c);
|
|
}
|
|
|
|
// Do not fail on erroneous classes with fields of incompletely-defined types.
|
|
// Base class is malformed.
|
|
namespace BaseMalformed {
|
|
struct A; // expected-note {{forward declaration of 'BaseMalformed::A'}}
|
|
struct B {
|
|
A a; // expected-error {{field has incomplete type 'BaseMalformed::A'}}
|
|
};
|
|
struct C : public B {} c;
|
|
B *b = reinterpret_cast<B *>(&c);
|
|
} // end anonymous namespace
|
|
|
|
// Child class is malformed.
|
|
namespace ChildMalformed {
|
|
struct A; // expected-note {{forward declaration of 'ChildMalformed::A'}}
|
|
struct B {};
|
|
struct C : public B {
|
|
A a; // expected-error {{field has incomplete type 'ChildMalformed::A'}}
|
|
} c;
|
|
B *b = reinterpret_cast<B *>(&c);
|
|
} // end anonymous namespace
|
|
|
|
// Base class outside upcast base-chain is malformed.
|
|
namespace BaseBaseMalformed {
|
|
struct A; // expected-note {{forward declaration of 'BaseBaseMalformed::A'}}
|
|
struct Y {};
|
|
struct X { A a; }; // expected-error {{field has incomplete type 'BaseBaseMalformed::A'}}
|
|
struct B : Y, X {};
|
|
struct C : B {} c;
|
|
B *p = reinterpret_cast<B*>(&c);
|
|
}
|
|
|
|
namespace InheritanceMalformed {
|
|
struct A; // expected-note {{forward declaration of 'InheritanceMalformed::A'}}
|
|
struct B : A {}; // expected-error {{base class has incomplete type}}
|
|
struct C : B {} c;
|
|
B *p = reinterpret_cast<B*>(&c);
|
|
}
|
|
|
|
// Virtual base class outside upcast base-chain is malformed.
|
|
namespace VBaseMalformed{
|
|
struct A; // expected-note {{forward declaration of 'VBaseMalformed::A'}}
|
|
struct X { A a; }; // expected-error {{field has incomplete type 'VBaseMalformed::A'}}
|
|
struct B : public virtual X {};
|
|
struct C : B {} c;
|
|
B *p = reinterpret_cast<B*>(&c);
|
|
}
|
|
|
|
void reinterpret_not_updowncast(A *pa, const A *pca, A &a, const A &ca) {
|
|
(void)*reinterpret_cast<C *>(pa);
|
|
(void)*reinterpret_cast<const C *>(pa);
|
|
(void)*reinterpret_cast<volatile C *>(pa);
|
|
(void)*reinterpret_cast<const volatile C *>(pa);
|
|
|
|
(void)*reinterpret_cast<const C *>(pca);
|
|
(void)*reinterpret_cast<const volatile C *>(pca);
|
|
|
|
(void)reinterpret_cast<C &>(a);
|
|
(void)reinterpret_cast<const C &>(a);
|
|
(void)reinterpret_cast<volatile C &>(a);
|
|
(void)reinterpret_cast<const volatile C &>(a);
|
|
|
|
(void)reinterpret_cast<const C &>(ca);
|
|
(void)reinterpret_cast<const volatile C &>(ca);
|
|
}
|
|
|
|
void reinterpret_pointer_downcast(A *a, const A *ca) {
|
|
(void)*reinterpret_cast<DA *>(a);
|
|
(void)*reinterpret_cast<const DA *>(a);
|
|
(void)*reinterpret_cast<volatile DA *>(a);
|
|
(void)*reinterpret_cast<const volatile DA *>(a);
|
|
|
|
(void)*reinterpret_cast<const DA *>(ca);
|
|
(void)*reinterpret_cast<const volatile DA *>(ca);
|
|
|
|
(void)*reinterpret_cast<DDA *>(a);
|
|
(void)*reinterpret_cast<DAo *>(a);
|
|
(void)*reinterpret_cast<DAi *>(a);
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'DVA *' from its virtual base 'A *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)*reinterpret_cast<DVA *>(a);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:10-[[@LINE-1]]:26}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'DDVA *' from its virtual base 'A *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)*reinterpret_cast<DDVA *>(a);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:10-[[@LINE-1]]:26}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'DMA *' from its virtual base 'A *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)*reinterpret_cast<DMA *>(a);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:10-[[@LINE-1]]:26}:"static_cast"
|
|
}
|
|
|
|
void reinterpret_reference_downcast(A a, A &ra, const A &cra) {
|
|
(void)reinterpret_cast<DA &>(a);
|
|
(void)reinterpret_cast<const DA &>(a);
|
|
(void)reinterpret_cast<volatile DA &>(a);
|
|
(void)reinterpret_cast<const volatile DA &>(a);
|
|
|
|
(void)reinterpret_cast<DA &>(ra);
|
|
(void)reinterpret_cast<const DA &>(ra);
|
|
(void)reinterpret_cast<volatile DA &>(ra);
|
|
(void)reinterpret_cast<const volatile DA &>(ra);
|
|
|
|
(void)reinterpret_cast<const DA &>(cra);
|
|
(void)reinterpret_cast<const volatile DA &>(cra);
|
|
|
|
(void)reinterpret_cast<DDA &>(a);
|
|
(void)reinterpret_cast<DAo &>(a);
|
|
(void)reinterpret_cast<DAi &>(a);
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'DVA &' from its virtual base 'A' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)reinterpret_cast<DVA &>(a);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'DDVA &' from its virtual base 'A' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)reinterpret_cast<DDVA &>(a);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'DMA &' from its virtual base 'A' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)reinterpret_cast<DMA &>(a);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
}
|
|
|
|
void reinterpret_pointer_upcast(DA *da, const DA *cda, DDA *dda, DAo *dao,
|
|
DAi *dai, DVA *dva, DDVA *ddva, DMA *dma) {
|
|
(void)*reinterpret_cast<A *>(da);
|
|
(void)*reinterpret_cast<const A *>(da);
|
|
(void)*reinterpret_cast<volatile A *>(da);
|
|
(void)*reinterpret_cast<const volatile A *>(da);
|
|
|
|
(void)*reinterpret_cast<const A *>(cda);
|
|
(void)*reinterpret_cast<const volatile A *>(cda);
|
|
|
|
(void)*reinterpret_cast<A *>(dda);
|
|
(void)*reinterpret_cast<DA *>(dda);
|
|
(void)*reinterpret_cast<A *>(dao);
|
|
(void)*reinterpret_cast<A *>(dai);
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DVA *' to its virtual base 'A *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)*reinterpret_cast<A *>(dva);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:10-[[@LINE-1]]:26}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DDVA *' to its virtual base 'A *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)*reinterpret_cast<A *>(ddva);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:10-[[@LINE-1]]:26}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DDVA *' to its virtual base 'DA *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)*reinterpret_cast<DA *>(ddva);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:10-[[@LINE-1]]:26}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DMA *' to its virtual base 'A *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)*reinterpret_cast<A *>(dma);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:10-[[@LINE-1]]:26}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DMA *' to its virtual base 'DA *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)*reinterpret_cast<DA *>(dma);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:10-[[@LINE-1]]:26}:"static_cast"
|
|
}
|
|
|
|
void reinterpret_reference_upcast(DA &da, const DA &cda, DDA &dda, DAo &dao,
|
|
DAi &dai, DVA &dva, DDVA &ddva, DMA &dma) {
|
|
(void)reinterpret_cast<A &>(da);
|
|
(void)reinterpret_cast<const A &>(da);
|
|
(void)reinterpret_cast<volatile A &>(da);
|
|
(void)reinterpret_cast<const volatile A &>(da);
|
|
|
|
(void)reinterpret_cast<const A &>(cda);
|
|
(void)reinterpret_cast<const volatile A &>(cda);
|
|
|
|
(void)reinterpret_cast<A &>(dda);
|
|
(void)reinterpret_cast<DA &>(dda);
|
|
(void)reinterpret_cast<A &>(dao);
|
|
(void)reinterpret_cast<A &>(dai);
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DVA' to its virtual base 'A &' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)reinterpret_cast<A &>(dva);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DDVA' to its virtual base 'A &' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)reinterpret_cast<A &>(ddva);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DDVA' to its virtual base 'DA &' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)reinterpret_cast<DA &>(ddva);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DMA' to its virtual base 'A &' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)reinterpret_cast<A &>(dma);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'DMA' to its virtual base 'DA &' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)reinterpret_cast<DA &>(dma);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
}
|
|
|
|
struct E {
|
|
int x;
|
|
};
|
|
|
|
class F : public E {
|
|
virtual int foo() { return x; }
|
|
};
|
|
|
|
class G : public F {
|
|
};
|
|
|
|
class H : public E, public A {
|
|
};
|
|
|
|
class I : virtual public F {
|
|
};
|
|
|
|
typedef const F * K;
|
|
typedef volatile K L;
|
|
|
|
void different_subobject_downcast(E *e, F *f, A *a) {
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'F *' from its base at non-zero offset 'E *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)reinterpret_cast<F *>(e);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'G *' from its base at non-zero offset 'E *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)reinterpret_cast<G *>(e);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
(void)reinterpret_cast<H *>(e);
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'I *' from its virtual base 'E *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)reinterpret_cast<I *>(e);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
|
|
(void)reinterpret_cast<G *>(f);
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'I *' from its virtual base 'F *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)reinterpret_cast<I *>(f);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
#ifdef MSABI
|
|
// In MS ABI mode, A is at non-zero offset in H.
|
|
// expected-warning@+3 {{'reinterpret_cast' to class 'H *' from its base at non-zero offset 'A *' behaves differently from 'static_cast'}}
|
|
// expected-note@+2 {{use 'static_cast'}}
|
|
#endif
|
|
(void)reinterpret_cast<H *>(a);
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' to class 'L' (aka 'const F *volatile') from its base at non-zero offset 'E *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while downcasting}}
|
|
(void)reinterpret_cast<L>(e);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
}
|
|
|
|
void different_subobject_upcast(F *f, G *g, H *h, I *i) {
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'F *' to its base at non-zero offset 'E *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)reinterpret_cast<E *>(f);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
(void)reinterpret_cast<F *>(g);
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'G *' to its base at non-zero offset 'E *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)reinterpret_cast<E *>(g);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
(void)reinterpret_cast<E *>(h);
|
|
|
|
#ifdef MSABI
|
|
// In MS ABI mode, A is at non-zero offset in H.
|
|
// expected-warning@+3 {{'reinterpret_cast' from class 'H *' to its base at non-zero offset 'A *' behaves differently from 'static_cast'}}
|
|
// expected-note@+2 {{use 'static_cast'}}
|
|
#endif
|
|
(void)reinterpret_cast<A *>(h);
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'I *' to its virtual base 'F *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)reinterpret_cast<F *>(i);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
|
|
// expected-warning@+2 {{'reinterpret_cast' from class 'I *' to its virtual base 'E *' behaves differently from 'static_cast'}}
|
|
// expected-note@+1 {{use 'static_cast' to adjust the pointer correctly while upcasting}}
|
|
(void)reinterpret_cast<E *>(i);
|
|
// CHECK: fix-it:"{{.*}}":{[[@LINE-1]]:9-[[@LINE-1]]:25}:"static_cast"
|
|
}
|