forked from OSchip/llvm-project
122 lines
2.9 KiB
C++
122 lines
2.9 KiB
C++
// RUN: %clang_cc1 -fsyntax-only -verify=expected,cxx14 -std=c++14 %s
|
|
// RUN: %clang_cc1 -fsyntax-only -verify -std=c++2a %s
|
|
|
|
typedef __SIZE_TYPE__ size_t;
|
|
|
|
namespace basic {
|
|
// Ensuring that __bos can be used in constexpr functions without anything
|
|
// sketchy going on...
|
|
constexpr int bos0() {
|
|
int k = 5;
|
|
char cs[10] = {};
|
|
return __builtin_object_size(&cs[k], 0);
|
|
}
|
|
|
|
constexpr int bos1() {
|
|
int k = 5;
|
|
char cs[10] = {};
|
|
return __builtin_object_size(&cs[k], 1);
|
|
}
|
|
|
|
constexpr int bos2() {
|
|
int k = 5;
|
|
char cs[10] = {};
|
|
return __builtin_object_size(&cs[k], 2);
|
|
}
|
|
|
|
constexpr int bos3() {
|
|
int k = 5;
|
|
char cs[10] = {};
|
|
return __builtin_object_size(&cs[k], 3);
|
|
}
|
|
|
|
static_assert(bos0() == sizeof(char) * 5, "");
|
|
static_assert(bos1() == sizeof(char) * 5, "");
|
|
static_assert(bos2() == sizeof(char) * 5, "");
|
|
static_assert(bos3() == sizeof(char) * 5, "");
|
|
}
|
|
|
|
namespace in_enable_if {
|
|
// The code that prompted these changes was __bos in enable_if
|
|
|
|
void copy5CharsInto(char *buf) // expected-note{{candidate}}
|
|
__attribute__((enable_if(__builtin_object_size(buf, 0) != -1 &&
|
|
__builtin_object_size(buf, 0) > 5,
|
|
"")));
|
|
|
|
// We use different EvalModes for __bos with type 0 versus 1. Ensure 1 works,
|
|
// too...
|
|
void copy5CharsIntoStrict(char *buf) // expected-note{{candidate}}
|
|
__attribute__((enable_if(__builtin_object_size(buf, 1) != -1 &&
|
|
__builtin_object_size(buf, 1) > 5,
|
|
"")));
|
|
|
|
struct LargeStruct {
|
|
int pad;
|
|
char buf[6];
|
|
int pad2;
|
|
};
|
|
|
|
struct SmallStruct {
|
|
int pad;
|
|
char buf[5];
|
|
int pad2;
|
|
};
|
|
|
|
void noWriteToBuf() {
|
|
char buf[6];
|
|
copy5CharsInto(buf);
|
|
|
|
LargeStruct large;
|
|
copy5CharsIntoStrict(large.buf);
|
|
}
|
|
|
|
void initTheBuf() {
|
|
char buf[6] = {};
|
|
copy5CharsInto(buf);
|
|
|
|
LargeStruct large = {0, {}, 0};
|
|
copy5CharsIntoStrict(large.buf);
|
|
}
|
|
|
|
int getI();
|
|
void initTheBufWithALoop() {
|
|
char buf[6] = {};
|
|
for (unsigned I = getI(); I != sizeof(buf); ++I)
|
|
buf[I] = I;
|
|
copy5CharsInto(buf);
|
|
|
|
LargeStruct large;
|
|
for (unsigned I = getI(); I != sizeof(buf); ++I)
|
|
large.buf[I] = I;
|
|
copy5CharsIntoStrict(large.buf);
|
|
}
|
|
|
|
void tooSmallBuf() {
|
|
char buf[5];
|
|
copy5CharsInto(buf); // expected-error{{no matching function for call}}
|
|
|
|
SmallStruct small;
|
|
copy5CharsIntoStrict(small.buf); // expected-error{{no matching function for call}}
|
|
}
|
|
}
|
|
|
|
namespace InvalidBase {
|
|
// Ensure this doesn't crash.
|
|
struct S { const char *name; };
|
|
S invalid_base();
|
|
constexpr size_t bos_name = __builtin_object_size(invalid_base().name, 1);
|
|
static_assert(bos_name == -1, "");
|
|
|
|
struct T { ~T(); };
|
|
T invalid_base_2();
|
|
constexpr size_t bos_dtor = __builtin_object_size(&(T&)(T&&)invalid_base_2(), 0);
|
|
static_assert(bos_dtor == -1, "");
|
|
}
|
|
|
|
// PR44268
|
|
constexpr int bos_new() { // cxx14-error {{constant expression}}
|
|
void *p = new int; // cxx14-note {{until C++20}}
|
|
return __builtin_object_size(p, 0);
|
|
}
|