[Bug tree-optimization/40140] New: [4.5 Regression] ICE with -ftree-parallelize-loops

[Bug tree-optimization/40140] New: [4.5 Regression] ICE with -ftree-parallelize-loops

[reichelt at gcc dot gnu dot org]

The attached valid code snippet triggers an ICE on the trunk when compiled with
"-O2 -ftree-parallelize-loops=2":

g++: Internal error: Segmentation fault (program cc1plus)
Please submit a full bug report. [etc.]


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           Summary: [4.5 Regression] ICE with -ftree-parallelize-loops
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Keywords: ice-on-valid-code, monitored
          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=40140

[Bug tree-optimization/40140] [4.5 Regression] ICE with -ftree-parallelize-loops

[reichelt at gcc dot gnu dot org]

-- 

reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Target Milestone|---                         |4.5.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40140

[Bug tree-optimization/40140] [4.5 Regression] ICE with -ftree-parallelize-loops

[reichelt at gcc dot gnu dot org]

------- Comment #1 from reichelt at gcc dot gnu dot org  2009-05-14 07:17 -------
Created an attachment (id=17862)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=17862&action=view)
Testcase (about 90 lines)


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40140

[Bug tree-optimization/40140] [4.5 Regression] ICE with -ftree-parallelize-loops

[rguenth at gcc dot gnu dot org]

-- 

rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Priority|P3                          |P2


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40140

[Bug tree-optimization/40140] [4.5 Regression] ICE with -ftree-parallelize-loops

[reichelt at gcc dot gnu dot org]

------- Comment #2 from reichelt at gcc dot gnu dot org  2009-06-06 22:54 -------
The original testcase doesn't crash anymore, but now an even simpler version
crashes:

============================================================================
double sqrt(double x) { double d; asm("" : "=t"(d) : "0"(x)); return d; }

struct A
{
  A();
  int i;
  int* p;
};

int foo(const A& a)
{
  int s = 0;
  for (int i = 0; i < a.i; ++i)
    s += a.p[i];
  return s;
}

template<int> struct B
{
  static const bool b = true;
};

template<int N, bool = B<N>::b> struct C {};

template<int> void bar(const C<0>&, const A& a, bool b = true)
{
  A x;
  int d = sqrt(foo(a));
  if (b) d = 1;
}

void baz()
{
  A a;
  bar<0>(C<0>(), a);
  bar<0>(C<0>(), a);
}
============================================================================


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40140

[Bug tree-optimization/40140] [4.5 Regression] ICE with -ftree-parallelize-loops

[rguenth at gcc dot gnu dot org]

------- Comment #3 from rguenth at gcc dot gnu dot org  2009-11-09 13:44 -------
Neither testcase crashes for me anymore (x86-64, with and without -m32).


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rguenth at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |WAITING


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40140

[Bug tree-optimization/40140] [4.5 Regression] ICE with -ftree-parallelize-loops

[reichelt at gcc dot gnu dot org]

------- Comment #4 from reichelt at gcc dot gnu dot org  2009-11-09 21:59 -------
The second testcase stopped crashing in August or September. Because the first
testcase stopped crashing although the bug wasn't really fixed, I thought it
would maybe pop up again. But apparently it didn't. So let's close the bug for
good.


-- 

reichelt at gcc dot gnu dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|WAITING                     |RESOLVED
         Resolution|                            |FIXED


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40140