https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102548
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Keywords| |ice-on-valid-code
Summary|gcc segmentation fault in |[9/10/11/12 Regression] ICE
|cc1plus (with repro case) |with cdecl attribute on a
| |builtin function
Target Milestone|--- |9.5
--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
sometime between GCC 6 and GCC 7, the ICE was introduced before this was
rejected:
<source>: In function 'void f()':
<source>:12:35: error: invalid conversion from 'size_t
(__attribute__((__cdecl__)) *)(char*, size_t, const char*, const tm*) {aka
unsigned int (__attribute__((__cdecl__)) *)(char*, unsigned int, const char*,
const tm*)}' to 'T {aka unsigned int (__attribute__((__stdcall__)) *)(char*,
unsigned int, const char*, const tm*)}' [-fpermissive]
static T strftime = loadStrftime();
~~~~~~~~~~~~^~
Note using auto instead of the type T, the ICE shows up still:
typedef decltype(sizeof(0)) size_t;
struct tm;
extern "C"
size_t __attribute__((__cdecl__)) strftime(char * _Buf,size_t
_SizeInBytes,const char * _Format,const struct tm * _Tm);
void f(void)
{
auto g = strftime;
}
And was accepted in GCC 6.
So this is a regression from GCC6.
Looks like it has to do with builtin functions too.
