[Bug c++/59083] -fisolate-erroneous-paths produces illegal instruction with enabled -fprofile-generate

[octoploid at yandex dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59083

--- Comment #13 from Markus Trippelsdorf <octoploid at yandex dot com> ---
(In reply to Jeffrey A. Law from comment #11)
> Damn it.  Tested the wrong compiler.
> 
> The problem with your testcase Markus is you're simply not allowed to pass a
> null pointer to sprintf, memcpy and a variety of other functions.  Once you
> execute code which attempts that, you've walked into the realm of undefined
> behaviour.
> 
> Once you cross that boundary the compiler is allowed to do these kinds of
> transformations.  Your testcode is fundamentally flawed in that it relies
> upon undefined behaviour.

Understood. But the problem is that "the kernel" and "x.org" still fail.
I will try to come up with testcases for those two and see if it's also
caused by the same undefined behavior.