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* [Bug middle-end/86284] Insert trap instruction in place of missing return statement on dodgy code
       [not found] <bug-86284-4@http.gcc.gnu.org/bugzilla/>
@ 2021-07-24  9:57 ` pinskia at gcc dot gnu.org
  2021-07-24  9:59 ` pinskia at gcc dot gnu.org
  1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-07-24  9:57 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86284

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #3)
> I thought it was defined unless the return value is actually used.

To answer my own question:
For C it is.  For C++ it is not; it is undefined if there is no return value.

^ permalink raw reply	[flat|nested] 2+ messages in thread
* [Bug middle-end/86284] Insert trap instruction in place of missing return statement on dodgy code
       [not found] <bug-86284-4@http.gcc.gnu.org/bugzilla/>
  2021-07-24  9:57 ` [Bug middle-end/86284] Insert trap instruction in place of missing return statement on dodgy code pinskia at gcc dot gnu.org
@ 2021-07-24  9:59 ` pinskia at gcc dot gnu.org
  1 sibling, 0 replies; 2+ messages in thread
From: pinskia at gcc dot gnu.org @ 2021-07-24  9:59 UTC (permalink / raw)
  To: gcc-bugs

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86284

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
-fsanitize=unreachable will find the C++ cases right now.

For C, it is a little harder because it is only undefined if the value is used.

^ permalink raw reply	[flat|nested] 2+ messages in thread
end of thread, other threads:[~2021-07-24  9:59 UTC | newest]

Thread overview: 2+ messages (download: mbox.gz / follow: Atom feed)
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     [not found] <bug-86284-4@http.gcc.gnu.org/bugzilla/>
2021-07-24  9:57 ` [Bug middle-end/86284] Insert trap instruction in place of missing return statement on dodgy code pinskia at gcc dot gnu.org
2021-07-24  9:59 ` pinskia at gcc dot gnu.org

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