[LLVMbugs] [Bug 9726] New: -O2 -ftree-vectorize -fplugin-arg-dragonegg-enable-gcc-optzns fails to compile output_vtk.c

[bugzilla-daemon at llvm.org]

http://llvm.org/bugs/show_bug.cgi?id=9726

           Summary: -O2 -ftree-vectorize
                    -fplugin-arg-dragonegg-enable-gcc-optzns fails to
                    compile output_vtk.c
           Product: dragonegg
           Version: trunk
          Platform: Macintosh
        OS/Version: MacOS X
            Status: NEW
          Severity: normal
          Priority: P
         Component: New Bugs
        AssignedTo: baldrick at free.fr
        ReportedBy: howarth at nitro.med.uc.edu
                CC: llvmbugs at cs.uiuc.edu


Created an attachment (id=6474)
 --> (http://llvm.org/bugs/attachment.cgi?id=6474)
preprocessed source file for src/output_vtk.c

The src/output_vtk.c source file from Athena 4.0 fails to compile with -O2
-ftree-vectorize -fplugin-arg-dragonegg-enable-gcc-optzns using dragonegg trunk
svn at r129512 on x86_64-apple-darwin10. The failure appears as...

[MacPro:~/Downloads/athena4.0/src] howarth% /sw/lib/gcc4.5/bin/gcc-4
-fplugin=/sw/lib/gcc4.5/lib/dragonegg.so -O2 -ftree-vectorize
-fplugin-arg-dragonegg-enable-gcc-optzns --save-temps -c output_vtk.c
vect_var_.85_356 = VEC_PACK_TRUNC_EXPR <vect_var_.83_353, vect_var_.84_355>;

Unhandled GIMPLE assignment!
UNREACHABLE executed at
/sw/src/fink.build/dragonegg-gcc45-2.9-1/include/dragonegg/Internals.h:116!
*** WARNING *** there are active plugins, do not report this as a bug unless
you can reproduce it without enabling any plugins.
Event                            | Plugins
PLUGIN_FINISH_UNIT               | dragonegg
PLUGIN_FINISH                    | dragonegg
PLUGIN_START_UNIT                | dragonegg
output_vtk.c: In function ‘output_vtk’:
output_vtk.c:32:6: internal compiler error: Abort trap
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

where the -ftree-vectorize flag triggers the failure.

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