https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114171
--- Comment #4 from Iain Buclaw <ibuclaw at gdcproject dot org> ---
Removed druntime dependency.
---
import gcc.builtins;
struct Token {
string label;
}
struct BreakStatement {
ulong pad;
Token label;
}
pragma(inline, false)
auto newclass()
{
void *p = __builtin_malloc(BreakStatement.sizeof);
__builtin_memset(p, 0, BreakStatement.sizeof);
return cast(BreakStatement*) p;
}
int main ()
{
auto bn = newclass();
return bn.label is Token.init;
}
---
Roughly the equivalent C++
---
struct Token {
struct {
__SIZE_TYPE__ length;
const char *ptr;
} label;
};
struct BreakStatement {
__UINT64_TYPE__ pad;
Token label;
};
__attribute__((noinline))
BreakStatement *newclass()
{
void *p = __builtin_malloc(sizeof(BreakStatement));
__builtin_memset(p, 0, sizeof(BreakStatement));
return (BreakStatement*) p;
}
int main ()
{
auto bn = newclass();
auto init = Token();
return *(__uint128_t*)&bn->label == *(__uint128_t*)&init;
}
---
