[Bug c++/37969] New: "-O2 -funswitch-loops" causes ICE in build_int_cst_wide, at tree.c:891 (OpenOffice.org)

["h dot mth at web dot de" <gcc-bugzilla at gcc dot gnu dot org>]

CFLAGS="-O2 -funswitch-loops" for OpenOffice.org build cause this:

# LC_ALL=C g++  -Wreturn-type -fmessage-length=0 -c -O2 -fno-strict-aliasing
-Wuninitialized -DENABLE_LAYOUT=0   -I.  -I../../unxlngx6.pro/inc/base3d
-I../inc -I../../inc/pch -I../../inc -I../../unx/inc -I../../unxlngx6.pro/inc
-I.
-I/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/solver/300/unxlngx6.pro/inc/stl
-I/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/solver/300/unxlngx6.pro/inc/external
-I/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/solver/300/unxlngx6.pro/inc
-I/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/solenv/unxlngx6/inc
-I/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/solenv/inc
-I/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/res
-I/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/solver/300/unxlngx6.pro/inc/stl
-I/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/solenv/inc/Xp31
-I/usr/lib/icedtea-6.1.4.12_pre20081028/include
-I/usr/lib/icedtea-6.1.4.12_pre20081028/include/linux
-I/usr/lib/icedtea-6.1.4.12_pre20081028/include/native_threads/include
-Idefault_x_includes 
-I/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/solver/300/unxlngx6.pro/inc/offuh
-I. -I../../res -I. -pipe -funswitch-loops -w -Wno-ctor-dtor-privacy
-fno-use-cxa-atexit -Wall -Wextra -Wendif-labels -Wshadow
-Wno-ctor-dtor-privacy     -Wno-non-virtual-dtor   -fpic -DLINUX -DUNX -DVCL
-DGCC -DC341 -DX86_64 -DCVER=C341 -DNPTL -DGLIBC=2 -DX86_64 -D_PTHREADS
-D_REENTRANT -DNEW_SOLAR -D_USE_NAMESPACE=1 -DSTLPORT_VERSION=400
-DHAVE_GCC_VISIBILITY_FEATURE -D__DMAKE -DUNIX -DCPPU_ENV=gcc3
-DGXX_INCLUDE_PATH=/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2/include/g++-v4
-DSUPD=300 -DPRODUCT -DNDEBUG -DPRODUCT_FULL -DOSL_DEBUG_LEVEL=0 -DOPTIMIZE
-DGSTREAMER -DCUI -DSOLAR_JAVA   -DSHAREDLIB -D_DLL_   -fexceptions
-fno-enforce-eh-specs -DEXCEPTIONS_ON  -o ../../unxlngx6.pro/slo/b3dgeom.o
/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/goodies/source/base3d/b3dgeom.cxx 
/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/goodies/source/base3d/b3dgeom.cxx:
In member function 'void B3dGeometry::CreateDefaultTexture(sal_uInt16,
sal_Bool)':
/mnt/data/tmp/portage/app-office/openoffice-3.0.0.9999_pre9/work/ooo-build/build/ooo300-m9/goodies/source/base3d/b3dgeom.cxx:837:
internal compiler error: in build_int_cst_wide, at tree.c:891

CFLAGS="-O1 -funswitch-loops" compile it just fine.

# LC_ALL=C gcc -v
Using built-in specs.
Target: x86_64-pc-linux-gnu
Configured with:
/mnt/data/tmp/portage/sys-devel/gcc-4.3.2/work/gcc-4.3.2/configure
--prefix=/usr --bindir=/usr/x86_64-pc-linux-gnu/gcc-bin/4.3.2
--includedir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2/include
--datadir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.3.2
--mandir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.3.2/man
--infodir=/usr/share/gcc-data/x86_64-pc-linux-gnu/4.3.2/info
--with-gxx-include-dir=/usr/lib/gcc/x86_64-pc-linux-gnu/4.3.2/include/g++-v4
--host=x86_64-pc-linux-gnu --build=x86_64-pc-linux-gnu --disable-altivec
--enable-nls --without-included-gettext --with-system-zlib --disable-checking
--disable-werror --enable-secureplt --disable-multilib --disable-libmudflap
--disable-libssp --disable-libgomp --enable-cld --disable-libgcj
--enable-languages=c,c++,treelang --enable-shared --enable-threads=posix
--enable-__cxa_atexit --enable-clocale=gnu
--with-bugurl=http://bugs.gentoo.org/ --with-pkgversion='Gentoo 4.3.2 p1.0'
Thread model: posix
gcc version 4.3.2 (Gentoo 4.3.2 p1.0)

Gentoo bugreport
https://bugs.gentoo.org/show_bug.cgi?id=237997

Failing loop to unswitch
http://lxr.go-oo.org/source/graphics/goodies/source/base3d/b3dgeom.cxx#813


-- 
           Summary: "-O2 -funswitch-loops" causes ICE in build_int_cst_wide,
                    at tree.c:891 (OpenOffice.org)
           Product: gcc
           Version: 4.3.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: h dot mth at web dot de


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37969