[Bug tree-optimization/41718] New: internal compiler error: in add_stack_var_conflict, at cfgexpand.c:359

[Bug tree-optimization/41718] New: internal compiler error: in add_stack_var_conflict, at cfgexpand.c:359

[bernds_cb1 at t-online dot de]

The testcase for bug 38582 causes a new failure in gcc trunk, an internal
compiler error (see summary).  The revision is

Last Changed Rev: 152847
Last Changed Date: 2009-10-15 16:12:03 +0100 (Thu, 15 Oct 2009)

To reproduce, execute the following in the gcc build directory:

./f951 testcase.f90 -ffree-line-length-512 -g -ffree-form -ftime-report
-funroll-loops -O3

I'll attach the testcase to this bug as well.

I've briefly looked at it and this appears to be an integer overflow.  In
account_vars_for_block, we end up with new_sv_num == 65576, and
triangular_index overflows.


-- 
           Summary: internal compiler error: in add_stack_var_conflict, at
                    cfgexpand.c:359
           Product: gcc
           Version: 4.5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: tree-optimization
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: bernds_cb1 at t-online dot de
 GCC build triplet: i686-pc-linux-gnu
  GCC host triplet: i686-pc-linux-gnu
GCC target triplet: i686-pc-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41718

[Bug tree-optimization/41718] internal compiler error: in add_stack_var_conflict, at cfgexpand.c:359

[bernds_cb1 at t-online dot de]

------- Comment #1 from bernds_cb1 at t-online dot de  2009-10-15 19:05 -------
Created an attachment (id=18802)
 --> (http://gcc.gnu.org/bugzilla/attachment.cgi?id=18802&action=view)
Testcase to reproduce


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41718

[Bug tree-optimization/41718] internal compiler error: in add_stack_var_conflict, at cfgexpand.c:359

[rguenth at gcc dot gnu dot org]

------- Comment #2 from rguenth at gcc dot gnu dot org  2009-10-16 08:53 -------
I suggest to change size_t to HOST_WIDEST_INT.  But I guess on a 32bit host
you don't have any luck compiling this big testcase anyway...


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41718

[Bug tree-optimization/41718] internal compiler error: in add_stack_var_conflict, at cfgexpand.c:359

[pinskia at gcc dot gnu dot org]

------- Comment #3 from pinskia at gcc dot gnu dot org  2009-10-16 16:56 -------
There are a lot of variables here.  I don't even know if the resulting binary
will have enough stack space for those variables ...


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41718

[Bug tree-optimization/41718] internal compiler error: in add_stack_var_conflict, at cfgexpand.c:359

[bernds at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41718

Bernd Schmidt <bernds at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |RESOLVED
                 CC|                            |bernds at gcc dot gnu.org
         Resolution|                            |FIXED

--- Comment #4 from Bernd Schmidt <bernds at gcc dot gnu.org> 2012-05-10 16:36:34 UTC ---
I think this got fixed in r154689.