diff options
Diffstat (limited to 'clang/test/SemaCXX/address-space-conversion.cpp')
| -rw-r--r-- | clang/test/SemaCXX/address-space-conversion.cpp | 197 |
1 files changed, 197 insertions, 0 deletions
diff --git a/clang/test/SemaCXX/address-space-conversion.cpp b/clang/test/SemaCXX/address-space-conversion.cpp new file mode 100644 index 0000000..d21d419 --- /dev/null +++ b/clang/test/SemaCXX/address-space-conversion.cpp @@ -0,0 +1,197 @@ +// RUN: %clang_cc1 -fsyntax-only -verify %s + +// This test checks for the various conversions and casting operations +// with address-space-qualified pointers. + +struct A { virtual ~A() {} }; +struct B : A { }; + +typedef void *void_ptr; +typedef void __attribute__((address_space(1))) *void_ptr_1; +typedef void __attribute__((address_space(2))) *void_ptr_2; + +typedef int *int_ptr; +typedef int __attribute__((address_space(1))) *int_ptr_1; +typedef int __attribute__((address_space(2))) *int_ptr_2; + +typedef A *A_ptr; +typedef A __attribute__((address_space(1))) *A_ptr_1; +typedef A __attribute__((address_space(2))) *A_ptr_2; + +typedef B *B_ptr; +typedef B __attribute__((address_space(1))) *B_ptr_1; +typedef B __attribute__((address_space(2))) *B_ptr_2; + +void test_const_cast(int_ptr ip, int_ptr_1 ip1, int_ptr_2 ip2, + A_ptr ap, A_ptr_1 ap1, A_ptr_2 ap2, + const int *cip, + const int __attribute__((address_space(1))) *cip1) { + // Cannot use const_cast to cast between address spaces, add an + // address space, or remove an address space. + (void)const_cast<int_ptr>(ip1); // expected-error{{is not allowed}} + (void)const_cast<int_ptr>(ip2); // expected-error{{is not allowed}} + (void)const_cast<int_ptr_1>(ip); // expected-error{{is not allowed}} + (void)const_cast<int_ptr_1>(ip2); // expected-error{{is not allowed}} + (void)const_cast<int_ptr_2>(ip); // expected-error{{is not allowed}} + (void)const_cast<int_ptr_2>(ip1); // expected-error{{is not allowed}} + + (void)const_cast<A_ptr>(ap1); // expected-error{{is not allowed}} + (void)const_cast<A_ptr>(ap2); // expected-error{{is not allowed}} + (void)const_cast<A_ptr_1>(ap); // expected-error{{is not allowed}} + (void)const_cast<A_ptr_1>(ap2); // expected-error{{is not allowed}} + (void)const_cast<A_ptr_2>(ap); // expected-error{{is not allowed}} + (void)const_cast<A_ptr_2>(ap1); // expected-error{{is not allowed}} + + // It's acceptable to cast away constness. + (void)const_cast<int_ptr>(cip); + (void)const_cast<int_ptr_1>(cip1); +} + +void test_static_cast(void_ptr vp, void_ptr_1 vp1, void_ptr_2 vp2, + A_ptr ap, A_ptr_1 ap1, A_ptr_2 ap2, + B_ptr bp, B_ptr_1 bp1, B_ptr_2 bp2) { + // Well-formed upcast + (void)static_cast<A_ptr>(bp); + (void)static_cast<A_ptr_1>(bp1); + (void)static_cast<A_ptr_2>(bp2); + + // Well-formed downcast + (void)static_cast<B_ptr>(ap); + (void)static_cast<B_ptr_1>(ap1); + (void)static_cast<B_ptr_2>(ap2); + + // Well-formed cast to/from void + (void)static_cast<void_ptr>(ap); + (void)static_cast<void_ptr_1>(ap1); + (void)static_cast<void_ptr_2>(ap2); + (void)static_cast<A_ptr>(vp); + (void)static_cast<A_ptr_1>(vp1); + (void)static_cast<A_ptr_2>(vp2); + + // Ill-formed upcasts + (void)static_cast<A_ptr>(bp1); // expected-error{{is not allowed}} + (void)static_cast<A_ptr>(bp2); // expected-error{{is not allowed}} + (void)static_cast<A_ptr_1>(bp); // expected-error{{is not allowed}} + (void)static_cast<A_ptr_1>(bp2); // expected-error{{is not allowed}} + (void)static_cast<A_ptr_2>(bp); // expected-error{{is not allowed}} + (void)static_cast<A_ptr_2>(bp1); // expected-error{{is not allowed}} + + // Ill-formed downcasts + (void)static_cast<B_ptr>(ap1); // expected-error{{casts away qualifiers}} + (void)static_cast<B_ptr>(ap2); // expected-error{{casts away qualifiers}} + (void)static_cast<B_ptr_1>(ap); // expected-error{{casts away qualifiers}} + (void)static_cast<B_ptr_1>(ap2); // expected-error{{casts away qualifiers}} + (void)static_cast<B_ptr_2>(ap); // expected-error{{casts away qualifiers}} + (void)static_cast<B_ptr_2>(ap1); // expected-error{{casts away qualifiers}} + + // Ill-formed cast to/from void + (void)static_cast<void_ptr>(ap1); // expected-error{{is not allowed}} + (void)static_cast<void_ptr>(ap2); // expected-error{{is not allowed}} + (void)static_cast<void_ptr_1>(ap); // expected-error{{is not allowed}} + (void)static_cast<void_ptr_1>(ap2); // expected-error{{is not allowed}} + (void)static_cast<void_ptr_2>(ap); // expected-error{{is not allowed}} + (void)static_cast<void_ptr_2>(ap1); // expected-error{{is not allowed}} + (void)static_cast<A_ptr>(vp1); // expected-error{{casts away qualifiers}} + (void)static_cast<A_ptr>(vp2); // expected-error{{casts away qualifiers}} + (void)static_cast<A_ptr_1>(vp); // expected-error{{casts away qualifiers}} + (void)static_cast<A_ptr_1>(vp2); // expected-error{{casts away qualifiers}} + (void)static_cast<A_ptr_2>(vp); // expected-error{{casts away qualifiers}} + (void)static_cast<A_ptr_2>(vp1); // expected-error{{casts away qualifiers}} +} + +void test_dynamic_cast(A_ptr ap, A_ptr_1 ap1, A_ptr_2 ap2, + B_ptr bp, B_ptr_1 bp1, B_ptr_2 bp2) { + // Well-formed upcast + (void)dynamic_cast<A_ptr>(bp); + (void)dynamic_cast<A_ptr_1>(bp1); + (void)dynamic_cast<A_ptr_2>(bp2); + + // Well-formed downcast + (void)dynamic_cast<B_ptr>(ap); + (void)dynamic_cast<B_ptr_1>(ap1); + (void)dynamic_cast<B_ptr_2>(ap2); + + // Ill-formed upcasts + (void)dynamic_cast<A_ptr>(bp1); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<A_ptr>(bp2); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<A_ptr_1>(bp); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<A_ptr_1>(bp2); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<A_ptr_2>(bp); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<A_ptr_2>(bp1); // expected-error{{casts away qualifiers}} + + // Ill-formed downcasts + (void)dynamic_cast<B_ptr>(ap1); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<B_ptr>(ap2); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<B_ptr_1>(ap); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<B_ptr_1>(ap2); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<B_ptr_2>(ap); // expected-error{{casts away qualifiers}} + (void)dynamic_cast<B_ptr_2>(ap1); // expected-error{{casts away qualifiers}} +} + +void test_reinterpret_cast(void_ptr vp, void_ptr_1 vp1, void_ptr_2 vp2, + A_ptr ap, A_ptr_1 ap1, A_ptr_2 ap2, + B_ptr bp, B_ptr_1 bp1, B_ptr_2 bp2, + const void __attribute__((address_space(1))) *cvp1) { + // reinterpret_cast can be used to cast to a different address space. + (void)reinterpret_cast<A_ptr>(ap1); + (void)reinterpret_cast<A_ptr>(ap2); + (void)reinterpret_cast<A_ptr>(bp); + (void)reinterpret_cast<A_ptr>(bp1); + (void)reinterpret_cast<A_ptr>(bp2); + (void)reinterpret_cast<A_ptr>(vp); + (void)reinterpret_cast<A_ptr>(vp1); + (void)reinterpret_cast<A_ptr>(vp2); + (void)reinterpret_cast<A_ptr_1>(ap); + (void)reinterpret_cast<A_ptr_1>(ap2); + (void)reinterpret_cast<A_ptr_1>(bp); + (void)reinterpret_cast<A_ptr_1>(bp1); + (void)reinterpret_cast<A_ptr_1>(bp2); + (void)reinterpret_cast<A_ptr_1>(vp); + (void)reinterpret_cast<A_ptr_1>(vp1); + (void)reinterpret_cast<A_ptr_1>(vp2); + + // ... but don't try to cast away constness! + (void)reinterpret_cast<A_ptr_2>(cvp1); // expected-error{{casts away qualifiers}} +} + +void test_cstyle_cast(void_ptr vp, void_ptr_1 vp1, void_ptr_2 vp2, + A_ptr ap, A_ptr_1 ap1, A_ptr_2 ap2, + B_ptr bp, B_ptr_1 bp1, B_ptr_2 bp2, + const void __attribute__((address_space(1))) *cvp1) { + // C-style casts are the wild west of casts. + (void)(A_ptr)(ap1); + (void)(A_ptr)(ap2); + (void)(A_ptr)(bp); + (void)(A_ptr)(bp1); + (void)(A_ptr)(bp2); + (void)(A_ptr)(vp); + (void)(A_ptr)(vp1); + (void)(A_ptr)(vp2); + (void)(A_ptr_1)(ap); + (void)(A_ptr_1)(ap2); + (void)(A_ptr_1)(bp); + (void)(A_ptr_1)(bp1); + (void)(A_ptr_1)(bp2); + (void)(A_ptr_1)(vp); + (void)(A_ptr_1)(vp1); + (void)(A_ptr_1)(vp2); + (void)(A_ptr_2)(cvp1); +} + +void test_implicit_conversion(void_ptr vp, void_ptr_1 vp1, void_ptr_2 vp2, + A_ptr ap, A_ptr_1 ap1, A_ptr_2 ap2, + B_ptr bp, B_ptr_1 bp1, B_ptr_2 bp2) { + // Well-formed conversions + void_ptr vpA = ap; + void_ptr_1 vp_1A = ap1; + void_ptr_2 vp_2A = ap2; + A_ptr ap_A = bp; + A_ptr_1 ap_A1 = bp1; + A_ptr_2 ap_A2 = bp2; + + // Ill-formed conversions + void_ptr vpB = ap1; // expected-error{{cannot initialize a variable of type}} + void_ptr_1 vp_1B = ap2; // expected-error{{cannot initialize a variable of type}} + A_ptr ap_B = bp1; // expected-error{{cannot initialize a variable of type}} + A_ptr_1 ap_B1 = bp2; // expected-error{{cannot initialize a variable of type}} +} |