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* optimization/8392: [-fnew-ra] SegFault in
@ 2002-10-29 13:06 bangerth
0 siblings, 0 replies; only message in thread
From: bangerth @ 2002-10-29 13:06 UTC (permalink / raw)
To: gcc-gnats
>Number: 8392
>Category: optimization
>Synopsis: [-fnew-ra] SegFault in
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: unassigned
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Tue Oct 29 13:06:01 PST 2002
>Closed-Date:
>Last-Modified:
>Originator: Wolfgang Bangerth
>Release: unknown-1.0
>Organization:
>Environment:
gcc CVS from 2002/10/28, Linux i686 unknown
>Description:
The attached code SegFaults with present CVS and when
using -fnew-ra, -O2, and -funroll-all-loops together.
The segfault trashes the stack so thoroughly, that I
cannot get a backtrace beyond the lowest frame, which is
#0 0x0828efc6 in loop_invariant_p (loop=0x8850e88, x=0x4277400c)
at ../../gcc-3.3/gcc/loop.c:3276
I am sorry, but I cannot seem to reduce the code much
further.Even removing the line numbers the preprocessor
introduced seem to make the bug go away... Hope this helps
somewhat anyway.
Regards
Wolfgang
>How-To-Repeat:
2/deal.II> time c++ -fnew-ra -fpreprocessed -O2 -funroll-all-loops -c x.ii
source/data_out_base.cc: In static member function `static void
DataOutBase::write_gnuplot(const std::vector<DataOutBase::Patch<dim,
spacedim>, std::allocator<DataOutBase::Patch<dim, spacedim> > >&, const
std::vector<std::string, std::allocator<std::string> >&, const
DataOutBase::GnuplotFlags&, std::ostream&) [with int dim = 3, int spacedim =
4]':
source/data_out_base.cc:3567: instantiated from `void DataOutInterface<dim, spacedim>::write_gnuplot(std::ostream&) const [with int dim = 3, int spacedim = 4]'
source/data_out_base.cc:3952: instantiated from here
source/data_out_base.cc:1261: internal compiler error: Speicherzugriffsfehler
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://www.gnu.org/software/gcc/bugs.html> for instructions.
>Fix:
>Release-Note:
>Audit-Trail:
>Unformatted:
----gnatsweb-attachment----
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