Mailinglist Archive: opensuse-bugs (7530 mails)

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https://bugzilla.novell.com/show_bug.cgi?id=419260


           Summary: gcc43 miscompiles ruby SVN
           Product: openSUSE 11.0
           Version: Final
          Platform: Other
        OS/Version: Other
            Status: NEW
          Severity: Normal
          Priority: P5 - None
         Component: Development
        AssignedTo: rguenther@xxxxxxxxxx
        ReportedBy: matz@xxxxxxxxxx
         QAContact: qa@xxxxxxx
          Found By: Development


% cat circtest.c
struct seq_elem {
    struct seq_elem *next;
    struct seq_elem *prev;
};

static struct seq_elem b;
void
__attribute__((noinline))
init (struct seq_elem *a)
{
  b.prev = a;
  b.next = 0;
  a->prev = 0;
  a->next = &b;
}

extern void abort (void);
int main(void)
{
  struct seq_elem a;
  init (&a);
  struct seq_elem *ttt = a.next;
  ttt->prev->next = ttt->next;
  if (ttt == a.next)
    abort ();
  return 0;
}

% gcc -O2 circtest && ./a.out
Aborted
% gcc -O2 -fno-strict-aliasing && ./a.out
%

aliasing info is wrong, SMT doesn't mayalias some SFTs.  Seems to be
a local patch.  STABLE still has it.


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