https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89543
Andrew Pinski <pinskia at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|ASSIGNED |NEW
--- Comment #6 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #5)
> (In reply to Andrew Pinski from comment #4)
> > [apinski@xeond2 upstream-gcc-git]$ gdb --args ./gcc/objdir/stage1-gcc/cc1
> > /home/apinski/src/upstream-gcc-git/gcc/gcc/testsuite/gcc.dg/Wstringop-
> > overread-6.c
> >
> > ....
> > (gdb) p debug_generic_expr(expr)
> > strlen ((const char *) &arr + 4)
>
> Here is the reduced testcase:
> const char arr[7] = "abc\0def";
> int warn_strlen (void)
> {
> return __builtin_strlen (arr+4);
> }
fold_builtin_strlen->warn_string_no_nul->suppress_warning->set_no_warning_bit
(expr, supp);
Which then sets the bit.
No longer working on this. But at least I recorded where one of the
TREE_NO_WARNING flag is set these days.
