https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119984
--- Comment #8 from saul.x.robinson at durham dot ac.uk ---
(In reply to Andrew Pinski from comment #7)
> (In reply to saul.x.robinson from comment #6)
> >
> > Oh.
> > Just encase it exist, is there a setting to make GCC assume overflows are
> >
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119984
--- Comment #7 from Andrew Pinski ---
(In reply to saul.x.robinson from comment #6)
>
> Oh.
> Just encase it exist, is there a setting to make GCC assume overflows are
> possible as I have found them to be useful quite often?
I mentioned alrea
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119984
--- Comment #6 from saul.x.robinson at durham dot ac.uk ---
(In reply to Andrew Pinski from comment #5)
> (In reply to saul.x.robinson from comment #4)
> > I know the integer overflows.
> > Does that sort of undefined behavior cause issues with t
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119984
--- Comment #5 from Andrew Pinski ---
(In reply to saul.x.robinson from comment #4)
> I know the integer overflows.
> Does that sort of undefined behavior cause issues with the final machine
> code the compiler generates?
Yes. In this case if y
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119984
--- Comment #3 from Andrew Pinski ---
Please also read https://blog.regehr.org/archives/213 .
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119984
--- Comment #2 from Andrew Pinski ---
Note -fsanitize=undefined does catch this:
/app/example.c:5:4: runtime error: signed integer overflow: 2139095040 +
1065353216 cannot be represented in type 'int'
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119984
--- Comment #4 from saul.x.robinson at durham dot ac.uk ---
(In reply to saul.x.robinson from comment #0)
> I have confirmed is bug occurs on 15.1.0 and 12.2.0. Don't know how to find
> more recent versions.
> Those GCC versions were compiling fo
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119984
Andrew Pinski changed:
What|Removed |Added
Resolution|--- |INVALID
Status|UNCONFIRMED
