[Bug middle-end/56640] New: [4.8 Regression] bootstrap failure on arm-linux-gnueabi{,hf}

["doko at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=56640

             Bug #: 56640
           Summary: [4.8 Regression] bootstrap failure on
                    arm-linux-gnueabi{,hf}
    Classification: Unclassified
           Product: gcc
           Version: 4.8.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: middle-end
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: doko@gcc.gnu.org


seen with the 4.8.0 release candidate on arm-linux-gnueabi{,hf}

/build/buildd-gcc-4.8_4.8-20130315-1-armhf-5HYdhU/gcc-4.8-4.8-20130315/build/./prev-gcc/xg++
-B/build/buildd-gcc-4.8_4.8-20130315-1-armhf-5HYdhU/gcc-4.8-4.8-20130315/build/./prev-gcc/
-B/usr/arm-linux-gnueabihf/bin/ -nostdinc++
-B/build/buildd-gcc-4.8_4.8-20130315-1-armhf-5HYdhU/gcc-4.8-4.8-20130315/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-B/build/buildd-gcc-4.8_4.8-20130315-1-armhf-5HYdhU/gcc-4.8-4.8-20130315/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs
-I/build/buildd-gcc-4.8_4.8-20130315-1-armhf-5HYdhU/gcc-4.8-4.8-20130315/build/prev-arm-linux-gnueabihf/libstdc++-v3/include/arm-linux-gnueabihf
-I/build/buildd-gcc-4.8_4.8-20130315-1-armhf-5HYdhU/gcc-4.8-4.8-20130315/build/prev-arm-linux-gnueabihf/libstdc++-v3/include
-I/build/buildd-gcc-4.8_4.8-20130315-1-armhf-5HYdhU/gcc-4.8-4.8-20130315/src/libstdc++-v3/libsupc++
-L/build/buildd-gcc-4.8_4.8-20130315-1-armhf-5HYdhU/gcc-4.8-4.8-20130315/build/prev-arm-linux-gnueabihf/libstdc++-v3/src/.libs
-L/build/buildd-gcc-4.8_4.8-20130315-1-armhf-5HYdhU/gcc-4.8-4.8-20130315/build/prev-arm-linux-gnueabihf/libstdc++-v3/libsupc++/.libs
-c   -g -O2 -gtoggle -DIN_GCC   -fno-exceptions -fno-rtti
-fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings
-Wcast-qual -Wmissing-format-attribute -pedantic -Wno-long-long
-Wno-variadic-macros -Wno-overlength-strings -Werror   -DHAVE_CONFIG_H -I. -I.
-I../../src/gcc -I../../src/gcc/. -I../../src/gcc/../include
-I../../src/gcc/../libcpp/include  -I../../src/gcc/../libdecnumber
-I../../src/gcc/../libdecnumber/dpd -I../libdecnumber
-I../../src/gcc/../libbacktrace -DCLOOG_INT_GMP    ../../src/gcc/ira.c -o ira.o
../../src/gcc/ira.c: In function 'void print_translated_classes(FILE*, bool)':
../../src/gcc/ira.c:1396:49: error: iteration 16u invokes undefined behavior
[-Werror=aggressive-loop-optimizations]
     fprintf (f, " %s -> %s\n", reg_class_names[i],
                                                 ^
../../src/gcc/ira.c:1395:3: note: containing loop
   for (i = 0; i < N_REG_CLASSES; i++)
   ^
cc1plus: all warnings being treated as errors
make[5]: *** [ira.o] Error 1

configured with

Configured with: -v
     --with-pkgversion='Debian 4.8-20130315-1'
     --with-bugurl='file:///usr/share/doc/gcc-4.8/README.Bugs'
     --enable-languages=c,c++,go,fortran,objc,obj-c++
     --prefix=/usr
     --program-suffix=-4.8
     --enable-shared
     --enable-linker-build-id
     --libexecdir=/usr/lib
     --without-included-gettext
     --enable-threads=posix
     --with-gxx-include-dir=/usr/include/c++/4.8
     --libdir=/usr/lib
     --enable-nls
     --with-sysroot=/
     --enable-clocale=gnu
     --enable-libstdcxx-debug
     --enable-libstdcxx-time=yes
     --enable-gnu-unique-object
     --disable-libitm
     --enable-plugin
     --with-system-zlib
     --enable-objc-gc
     --enable-multiarch
     --disable-sjlj-exceptions
     --with-arch=armv7-a
     --with-fpu=vfpv3-d16
     --with-float=hard
     --with-mode=thumb
     --enable-checking=release
     --build=arm-linux-gnueabihf
     --host=arm-linux-gnueabihf
     --target=arm-linux-gnueabihf

and 

Configured with: -v
     --with-pkgversion='Debian 4.8-20130315-1'
     --with-bugurl='file:///usr/share/doc/gcc-4.8/README.Bugs'
     --enable-languages=c,c++,go,fortran,objc,obj-c++
     --prefix=/usr
     --program-suffix=-4.8
     --enable-shared
     --enable-linker-build-id
     --libexecdir=/usr/lib
     --without-included-gettext
     --enable-threads=posix
     --with-gxx-include-dir=/usr/include/c++/4.8
     --libdir=/usr/lib
     --enable-nls
     --with-sysroot=/
     --enable-clocale=gnu
     --enable-libstdcxx-debug
     --enable-libstdcxx-time=yes
     --enable-gnu-unique-object
     --disable-libitm
     --enable-plugin
     --with-system-zlib
     --enable-objc-gc
     --enable-multiarch
     --disable-sjlj-exceptions
     --with-arch=armv4t
     --with-float=soft
     --enable-checking=release
     --build=arm-linux-gnueabi
     --host=arm-linux-gnueabi
     --target=arm-linux-gnueabi