[Bug c++/49460] New: g++: Internal error: Segmentation fault (program cc1plus) using -O2 or -O3

[Bug c++/49460] New: g++: Internal error: Segmentation fault (program cc1plus) using -O2 or -O3

[rjarrett at mathworks dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49460

           Summary: g++: Internal error: Segmentation fault (program
                    cc1plus) using  -O2 or -O3
           Product: gcc
           Version: 4.5.3
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: rjarrett@mathworks.com


using GCC 4.5.3 one (and only one) file from our code base caused the compiler
to Segfault.
Set severity to normal because this only occurred in 1 file out of 10k+ and
workaround is available.
Workaround compile with -O1 or -O0


This issue does not occur when compiling with GCC4.4.5 or GCC 4.3.4


Version information:
GNU C++ (GCC) version 4.5.3 (i686-pc-linux-gnu)
        compiled by GNU C version 4.5.3, GMP version 4.3.2, MPFR version 2.4.2,
MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C++ (GCC) version 4.5.3 (i686-pc-linux-gnu)
        compiled by GNU C version 4.5.3, GMP version 4.3.2, MPFR version 2.4.2,
MPC version 0.8.2
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: caed1e0856fbbe32553e2b8828f0c55c
g++: Internal error: Segmentation fault (program cc1plus)

System type:
Debian Linux 6.01 (glnx86 and glnxa64)

GCC build/configuration options:  (glnx86 build shown)
 gcc -v
Using built-in specs.
COLLECT_GCC=gcc
COLLECT_LTO_WRAPPER=/mathworks/hub/3rdparty/internal/290712/glnx86/gcc-4.5.3/bin/../libexec/gcc/i686-pc-linux-gnu/4.5.3/lto-wrapper
Target: i686-pc-linux-gnu
Configured with:
/mathworks/devel/sandbox/greg/Amake.3p1/3p/sources/gcc-4.5/configure
--prefix=/hub/3rdparty/internal/290712/glnx86/gcc-4.5.3
--with-gmp=/mathworks/devel/sandbox/greg/Amake.3p1/3p/derived/glnx86/gcc-4.5/gmp
--with-mpfr=/mathworks/devel/sandbox/greg/Amake.3p1/3p/derived/glnx86/gcc-4.5/mpfr
--with-mpc=/mathworks/devel/sandbox/greg/Amake.3p1/3p/derived/glnx86/gcc-4.5/mpc
--enable-languages=c,c++,fortran
--with-as=/hub/3rdparty/internal/290712/glnx86/gcc-4.5.3/bin/as
--with-ld=/hub/3rdparty/internal/290712/glnx86/gcc-4.5.3/bin/ld
Thread model: posix
gcc version 4.5.3 (GCC) 

gcc version 4.4.5 (Debian 4.4.5-8) 


Compile line options/command line:
COLLECT_GCC_OPTIONS='-c' '-o' '/tmp/SM.o' '-I../../src/cgir_xform/include'
'-I../../src/include' '-I../../derived/glnx86/src/include'
'-I../../src/cgir_xform' '-I../include' '-I../../include'
'-I//mathworks/hub/3rdparty/R2012a/293758/glnx86/boost/include'
'-I//mathworks/hub/3rdparty/R2012a/287824/glnx86/unique_ptr'
'-I//mathworks/hub/3rdparty/R2012a/289443/glnx86/gmp/include'
'-I//mathworks/hub/3rdparty/R2012a/288615/glnx86/mpfr/include'
'-DMAKEHEADER_KEYWORDS' '-DMAKEHEADER_KEYWORDS'
'-DNEEDS_MX_ERRWARN_MSG_ID_AND_TXT' '-DSL_INTERNAL'
'-DCGIR_HANDWRITTEN_HEADERS' '-I../../simulink/include' '-DMODULE_CGIR'
'-DBUILDING_CGIR_XFORM' '-O2' '-D_POSIX_C_SOURCE=199506L' '-D_LARGEFILE_SOURCE'
'-D_FILE_OFFSET_BITS=64' '-v' '-save-temps' '-shared-libgcc' '-mtune=generic'
'-march=pentiumpro'

/mathworks/hub/3rdparty/internal/290712/glnx86/gcc-4.5.3/bin/../libexec/gcc/i686-pc-linux-gnu/4.5.3/cc1plus
-fpreprocessed SmartInliner.ii -quiet -dumpbase SmartInliner.cpp -mtune=generic
-march=pentiumpro -auxbase-strip /tmp/SM.o -O2 -version -o SmartInliner.s

---
SmartInliner.ii has attached to this file

[Bug c++/49460] g++: Internal error: Segmentation fault (program cc1plus) using -O2 or -O3

[rjarrett at mathworks dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49460

--- Comment #1 from Roger Jarrett <rjarrett at mathworks dot com> 2011-06-17 19:41:29 UTC ---
Created attachment 24555
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24555
preprocessed source file SmartInliner.ii (gzipped)

preprocessed file gzipped to allow upload

[Bug tree-optimization/49460] g++: Internal error: Segmentation fault (program cc1plus) using -O2 or -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49460

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |ASSIGNED
   Last reconfirmed|                            |2011.06.20 10:42:56
          Component|c++                         |tree-optimization
         AssignedTo|unassigned at gcc dot       |rguenth at gcc dot gnu.org
                   |gnu.org                     |
     Ever Confirmed|0                           |1

--- Comment #2 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-06-20 10:42:56 UTC ---
Confirmed.  Other workaround: -fno-tree-pre.

We are endlessly translating
{component_ref<fNextCell>,indirect_ref,D.126308_166}@.MEM_238

[Bug tree-optimization/49460] g++: Internal error: Segmentation fault (program cc1plus) using -O2 or -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49460

--- Comment #3 from Richard Guenther <rguenth at gcc dot gnu.org> 2011-06-20 12:53:53 UTC ---
Created attachment 24565
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24565
autoreduced testcase

[Bug tree-optimization/49460] g++: Internal error: Segmentation fault (program cc1plus) using -O2 or -O3

[rjarrett at mathworks dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49460

--- Comment #4 from Roger Jarrett <rjarrett at mathworks dot com> 2011-06-29 21:13:49 UTC ---
Confirmed  -fno-tree-pre worked around the issue using the  initial source 
--Roger

[Bug tree-optimization/49460] [4.5 Regression] g++: Internal error: Segmentation fault (program cc1plus) using -O2 or -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49460

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
      Known to work|                            |4.4.6, 4.6.1
   Target Milestone|---                         |4.5.4
            Summary|g++: Internal error:        |[4.5 Regression] g++:
                   |Segmentation fault (program |Internal error:
                   |cc1plus) using  -O2 or -O3  |Segmentation fault (program
                   |                            |cc1plus) using  -O2 or -O3
      Known to fail|                            |4.5.0, 4.5.3

[Bug tree-optimization/49460] [4.5 Regression] g++: Internal error: Segmentation fault (program cc1plus) using -O2 or -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49460

Richard Guenther <rguenth at gcc dot gnu.org> changed:

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

[Bug tree-optimization/49460] [4.5 Regression] g++: Internal error: Segmentation fault (program cc1plus) using -O2 or -O3

[rguenth at gcc dot gnu.org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49460

Richard Guenther <rguenth at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|ASSIGNED                    |RESOLVED
         Resolution|                            |FIXED
   Target Milestone|4.5.4                       |4.6.1

--- Comment #5 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-07-02 10:06:56 UTC ---
Fixed for 4.6.1.