public inbox for gcc-bugs@sourceware.org
help / color / mirror / Atom feed
* [Bug tree-optimization/35011]  New: [4.3 regression] ICE with -fcheck-data-deps
@ 2008-01-29 10:02 reichelt at gcc dot gnu dot org
  2008-01-29 10:06 ` [Bug tree-optimization/35011] " reichelt at gcc dot gnu dot org
                   ` (13 more replies)
  0 siblings, 14 replies; 15+ messages in thread
From: reichelt at gcc dot gnu dot org @ 2008-01-29 10:02 UTC (permalink / raw)
  To: gcc-bugs

The following testcase triggers an ICE when compiled with
"-O3 -fcheck-data-deps":

==========================================================================
double foo(const double* p0, const double* p1, const double* q0)
{
  double d;
  for (; p0 != p1; ++p0, ++q0)
    d += *p0 * *q0;
  return d;
}

struct A
{
  double x[3];
  const double* begin() const { return x; }
};

struct B
{
  A a0, a1;
  double d;
  B(const A&);
};

B::B(const A& a) : a0(a), a1(a), d(foo(a0.begin(), a0.begin()+3, a1.begin()))
{}
==========================================================================

(Number of distance vectors differ: Banerjee has 1, Omega has 0.
Banerjee dist vectors:
  3
Omega dist vectors:
data dependence relation:
(Data Dep:
  access_fn_A: {0B, +, 8}_1
  access_fn_B: {24B, +, 8}_1

 (subscript
  iterations_that_access_an_element_twice_in_A: [3 + 1 * x_1]
  last_conflict: 0
  iterations_that_access_an_element_twice_in_B: [0 + 1 * x_1]
  last_conflict: 0
  (Subscript distance: 3
  )
 )
  inner loop index: 0
  loop nest: (1 )
)
)
bug.cc: In constructor 'B::B(const A&)':
bug.cc:22: internal compiler error: in compute_affine_dependence, at
tree-data-ref.c:3849
Please submit a full bug report, [etc.]


-- 
           Summary: [4.3 regression] ICE with -fcheck-data-deps
           Product: gcc
           Version: 4.3.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: reichelt at gcc dot gnu dot org


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=35011


^ permalink raw reply	[flat|nested] 15+ messages in thread
end of thread, other threads:[~2009-04-01 16:32 UTC | newest]

Thread overview: 15+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2008-01-29 10:02 [Bug tree-optimization/35011] New: [4.3 regression] ICE with -fcheck-data-deps reichelt at gcc dot gnu dot org
2008-01-29 10:06 ` [Bug tree-optimization/35011] " reichelt at gcc dot gnu dot org
2008-01-29 14:02 ` jakub at gcc dot gnu dot org
2008-01-29 18:25 ` sebpop at gmail dot com
2008-03-15  0:44 ` [Bug tree-optimization/35011] [4.3/4.4 " jsm28 at gcc dot gnu dot org
2008-06-06 15:05 ` rguenth at gcc dot gnu dot org
2008-08-27 22:13 ` jsm28 at gcc dot gnu dot org
2008-09-30 21:56 ` [Bug tree-optimization/35011] [4.3 " reichelt at gcc dot gnu dot org
2008-11-11 20:40 ` [Bug tree-optimization/35011] " reichelt at gcc dot gnu dot org
2009-03-28 20:34 ` reichelt at gcc dot gnu dot org
2009-03-28 23:26 ` hjl dot tools at gmail dot com
2009-03-29  2:16 ` sebpop at gmail dot com
2009-04-01 16:30 ` hjl at gcc dot gnu dot org
2009-04-01 16:32 ` hjl dot tools at gmail dot com
2009-04-01 16:32 ` hjl at gcc dot gnu dot org

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for read-only IMAP folder(s) and NNTP newsgroup(s).