https://gcc.gnu.org/bugzilla/show_bug.cgi?id=110442
--- Comment #2 from Sam James <sjames at gcc dot gnu.org> ---
We should disable all instrumentation, at least if it needs a runtime.
With -fsanitize=undefined:
```
void *
resolve (void)
{
int a = 1 << 32;
__builtin_cpu_init ();
if (__builtin_cpu_supports ("f16c"))
return f1;
else
return f2;
}
```
```
$ ./a
a.c:18:13: runtime error: shift exponent 32 is too large for 32-bit type 'int'
Segmentation fault (core dumped) ./a
```
It is OK with -fsanitize=undefined -fsanitize-trap=undefined as no runtime is
needed.
