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IDProjectCategoryView StatusDate SubmittedLast Update
0000523VTK(No Category)public2004-01-16 11:172007-08-28 11:46
ReporterDemian Nave 
Assigned To 
PriorityhighSeverityfeatureReproducibilityalways
StatusclosedResolutionwon't fix 
PlatformOSOS Version
Product Version 
Target VersionFixed in Version 
Summary0000523: Imaging/vtkImageLogic.cxx causes GCC 3.2 internal compiler error with SSE2 enabled
DescriptionThought someone might know what to do with this.

Set CMAKE_CXX_FLAGS="-msse2 -mfpmath=sse" and build Imaging/vtkImageLogic.cxx with GCC3.2.{2,3} to see the error.

Make trueValue in vtkImageLogicExecute1() a volatile variable to fix the problem:

volatile T trueValue = (T)(self->GetOutputTrueValue());

I have verified this error on GCC 3.2.2 on RH9-x86 and GCC 3.2.3 on RHEW3-x86_64.

Cheers,
Demian
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  Notes
(0000499)
Mathieu Malaterre (developer)
2004-01-18 11:00

 Could not reproduce any bad behavior with gcc 3.3.2. Plus:
$ cat /proc/cpuinfo reveal that zorglub has sse and sse2. But most important thing, VTK doesn't make use of any MMX, SSE or SSE2 call. I suggest we close this bug.
(0000502)
Demian Nave (reporter)
2004-01-18 14:18

 This has nothing to do with VTK's explicit use of SSE or SSE2---it is an issue with trying to use GCC to AUTOMATICALLY compile SSE/SSE2 versions of VTK floating-point operations.

Although I will be putting this bug onto GCC's bug tracker, let me try again here with a specific example and perhaps this problem will not get dismissed so easily if other users experience the same issue:

Compiling VTK-4.2 with RedHat 9.0 on a Pentium4, using the RedHat Network update configuration of GCC:

Reading specs from /usr/lib/gcc-lib/i386-redhat-linux/3.2.2/specs
Configured with: ../configure --prefix=/usr --mandir=/usr/share/man --infodir=/usr/share/info --enable-shared --enable-threads=posix --disable-checking --with-system-zlib --enable-__cxa_atexit --host=i386-redhat-linux
Thread model: posix
gcc version 3.2.2 20030222 (Red Hat Linux 3.2.2-5)


use ccmake to set CMAKE_CXX_FLAGS to "-O2 -msse -msse2", have ccmake rebuild the Makefiles, then, compile vtkImageLogic.cxx, assuming a build directory of VTK42:

% cd VTK42/Imaging
% make vtkImageLogic.o
Building object file vtkImageLogic.o...
/usr/local/itk/VTK-4.2/Imaging/vtkImageLogic.cxx: In function `void
   vtkImageLogicExecute1(vtkImageLogic*, vtkImageData*, vtkImageData*, int*,
   int, T*) [with T = VTK_TT]':
/usr/local/itk/VTK-4.2/Imaging/vtkImageLogic.cxx:240: instantiated from here
/usr/local/itk/VTK-4.2/Imaging/vtkImageLogic.cxx:91: could not split insn
(insn 439 495 442 (set (reg:DF 21 rxmm0 [99])
        (if_then_else:DF (ne (mem:DF (reg/v/f:SI 1 edx [78]) [35 S8 A64])
                (reg:DF 21 rxmm0 [99]))
            (reg:DF 23 rxmm2)
            (const_double:DF 0 [0x0] 0 [0x0] 0 [0x0] 0 [0x0] 0 [0x0]))) 659 {*ss
e_movdfcc_const0_3} (insn_list 495 (insn_list 492 (nil)))
    (expr_list:REG_DEAD (reg:DF 23 rxmm2)
        (expr_list:REG_EQUIV (mem:DF (reg/v/f:SI 0 eax [81]) [35 S8 A64])
            (nil))))
/usr/local/itk/VTK-4.2/Imaging/vtkImageLogic.cxx:91: Internal compiler error in
   final_scan_insn, at final.c:2622
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugzilla.redhat.com/bugzilla/> [^] for instructions.
make[1]: *** [vtkImageLogic.o] Error 1
make: *** [default_target] Error 2
Exit 2

As I said in my original post, the compiler fails with an ICE. This is the build line from Imaging/Makefile:

vtkImageLogic.o: /usr/local/itk/VTK-4.2/Imaging/vtkImageLogic.cxx
        @echo "Building object file vtkImageLogic.o..."
        c++ -o vtkImageLogic.o -DvtkImaging_EXPORTS -O2 -msse2 -mfpmath=sse -Wno-deprecated -I/usr/X11R6/include -fPIC $(INCLUDE_FLAGS) -c /usr/local/itk/VTK-4.2/Imaging/vtkImageLogic.cxx


You can also try building vtkImageLogic.o right from a command prompt, and you get the same error.

Now, add in the 'volatile' qualifier onto the declaration

  volatile T trueValue = (T)(self->GetOutputTrueValue());

in the function vtkImageLogicExecute1(), and recompile:

% make vtkImageLogic.o
Building object file vtkImageLogic.o...

Success.

Cheers,
Demian
(0000503)
Demian Nave (reporter)
2004-01-18 14:21

 I should mention that my original post omitted "-O2" from CMAKE_CXX_FLAGS, which may have been the reason for not seeing the ICE.

Cheers,
Demian
(0000508)
Mathieu Malaterre (developer)
2004-01-18 18:07

 Changed CMAKE_CXX_FLAGS to '-O2 -march=pentium4 -mfpmath=sse -msse2' and could not reproduce using gcc 3.3.2 (fedora).
Demian, did you read that thread:
http://gcc.gnu.org/ml/gcc/2002-05/msg00253.html [^]

It appears to me as this is a bug in gcc when you don't specify -march=pentium4.

I suggest -again- we close this bug.
(0000509)
Demian Nave (reporter)
2004-01-18 18:21

 I got a response with respect to my GCC bug-list report, so this can certainly be closed. I wanted to make sure that this bug was known to VTK users with RedHat 9 systems with the broken GCC 3.2.2.

Cheers,
Demian
(0000510)
Mathieu Malaterre (developer)
2004-01-18 18:29

 Adding URL to gcc bugzilla:

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12918 [^]
(0000648)
Mathieu Malaterre (developer)
2004-02-15 23:30

 Adding another ressource:
http://gcc.gnu.org/ml/gcc-bugs/2003-01/msg00991.html [^]

 Issue History
Date Modified Username Field Change
2007-08-28 11:45 Zack Galbreath Note Deleted: 0008301
2007-08-28 11:46 Zack Galbreath Assigned To Andy Wilson =>
2007-08-28 11:46 Zack Galbreath Status backlog => closed
2007-08-28 11:46 Zack Galbreath Summary Goodsite => Imaging/vtkImageLogic.cxx causes GCC 3.2 internal compiler error with SSE2 enabled
2007-08-28 11:46 Zack Galbreath Project @16@ => VTK
2011-06-16 13:11 Zack Galbreath Category => (No Category)

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