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* [Bug target/30230]  New: Incorrect ia64 EH info when an EH region ends in the middle of a bundle
@ 2006-12-16 12:16 jakub at gcc dot gnu dot org
  2006-12-16 13:05 ` [Bug target/30230] " jakub at gcc dot gnu dot org
                   ` (5 more replies)
  0 siblings, 6 replies; 7+ messages in thread
From: jakub at gcc dot gnu dot org @ 2006-12-16 12:16 UTC (permalink / raw)
  To: gcc-bugs

struct A {};
struct B { virtual ~B(); };
B::~B () {}
struct C { void foo (short &, B &); };
struct D { void *d1; C *d2; virtual void virt (void) {} };
struct E { D *e1; B *e2; };
struct F { void bar (void *, B &); };
F *p __attribute__((weak));
volatile int r;

void C::foo (short &x, B &)
{
  if (r)
    throw A ();
  x = 1;
}

void F::bar (void *, B &)
{
  throw A ();
}

void baz (E &x)
{
  short g = 0;
  B b = *x.e2;
  x.e1->d2->foo (g, b);
  if (g)
    p->bar(x.e1->d1, b);
}

int main ()
{
  F g;
  D s;
  E h;
  p = &g;
  h.e1 = &s;
  try
    {
      baz (h);
    }
  catch (A &)
    {
    }
  return 0;
}

fails on ia64 at least with gcc trunk and 4.1.1 at -O2.
The problem is a br.call not at the end of a bundle where the EH region
ends right after it:
        .mbb
        ld8 r39 = [r15]
        br.call.sptk.many b0 = _ZN1F3barEPvR1B#
[.LEHE0:]
        nop 0
        ;;
As br.call sets rp to the address of the next bundle, when the personality
routine is called it doesn't think this call is inside of the .LEHB0 .. .LEHE0
EH region and calls std::terminate.


-- 
           Summary: Incorrect ia64 EH info when an EH region ends in the
                    middle of a bundle
           Product: gcc
           Version: 4.1.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: jakub at gcc dot gnu dot org
GCC target triplet: ia64-linux


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=30230


^ permalink raw reply	[flat|nested] 7+ messages in thread
end of thread, other threads:[~2007-01-10 19:01 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2006-12-16 12:16 [Bug target/30230] New: Incorrect ia64 EH info when an EH region ends in the middle of a bundle jakub at gcc dot gnu dot org
2006-12-16 13:05 ` [Bug target/30230] " jakub at gcc dot gnu dot org
2006-12-21 12:59 ` jakub at gcc dot gnu dot org
2006-12-21 13:04 ` jakub at gcc dot gnu dot org
2006-12-21 13:07 ` jakub at gcc dot gnu dot org
2007-01-01 21:01 ` wilson at gcc dot gnu dot org
2007-01-10 19:01 ` pinskia at gcc dot gnu dot org

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