[Bug target/65649] gcc generates overlarge constants for microblaze-linux-gnu

["dhowells at redhat dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=65649

--- Comment #2 from dhowells at redhat dot com <dhowells at redhat dot com> ---
gcc was based on the gcc-5.0.0-20150319 tarball generated from the gcc branch
redhat/gcc-5-branch plus the patches for the Fedora rawhide gcc and cross-gcc.

Configuration was:

CC=gcc \
CXX=g++ \
CFLAGS='-O2 -g -Wall -Wformat-security -fexceptions -fstack-protector-strong
--param=ssp-buffer-size=4 -grecord-gcc-switches -mtune=atom
-fasynchronous-unwind-tables' \
CXXFLAGS=' -O2 -g -Wformat-security -fstack-protector-strong
--param=ssp-buffer-size=4 -grecord-gcc-switches -mtune=atom
-fasynchronous-unwind-tables ' \
CFLAGS_FOR_TARGET='-g -O2 -Wall -fno-exceptions' \
AR_FOR_TARGET=/usr/bin/microblaze-linux-gnu-ar \
AS_FOR_TARGET=/usr/bin/microblaze-linux-gnu-as \
DLLTOOL_FOR_TARGET=/usr/bin/microblaze-linux-gnu-dlltool \
LD_FOR_TARGET=/usr/bin/microblaze-linux-gnu-ld \
NM_FOR_TARGET=/usr/bin/microblaze-linux-gnu-nm \
OBJDUMP_FOR_TARGET=/usr/bin/microblaze-linux-gnu-objdump \
RANLIB_FOR_TARGET=/usr/bin/microblaze-linux-gnu-ranlib \
READELF_FOR_TARGET=/usr/bin/microblaze-linux-gnu-readelf \
STRIP_FOR_TARGET=/usr/bin/microblaze-linux-gnu-strip \
WINDRES_FOR_TARGET=/usr/bin/microblaze-linux-gnu-windres \
WINDMC_FOR_TARGET=/usr/bin/microblaze-linux-gnu-windmc \
LDFLAGS='-Wl,-z,relro ' \
../gcc-5.0.0-20150319/configure --bindir=/usr/bin --build=i686-redhat-linux-gnu
--datadir=/usr/share --disable-decimal-float --disable-dependency-tracking
--disable-gold --disable-libgcj --disable-libgomp --disable-libmudflap
--disable-libquadmath --disable-libssp --disable-libunwind-exceptions
--disable-nls --disable-plugin --disable-shared --disable-silent-rules
--disable-sjlj-exceptions --disable-threads
--with-ld=/usr/bin/microblaze-linux-gnu-ld --enable-__cxa_atexit
--enable-checking=release --enable-gnu-indirect-function
--enable-gnu-unique-object --enable-initfini-array --enable-languages=c,c++
--enable-linker-build-id --enable-nls --enable-obsolete --enable-plugin
--enable-targets=all --exec-prefix=/usr --host=i686-redhat-linux-gnu
--includedir=/usr/include --infodir=/usr/share/info --libexecdir=/usr/libexec
--localstatedir=/var --mandir=/usr/share/man --prefix=/usr
--program-prefix=microblaze-linux-gnu- --sbindir=/usr/sbin
--sharedstatedir=/var/lib --sysconfdir=/etc --target=microblaze-linux-gnu
--with-bugurl=http://bugzilla.redhat.com/bugzilla/ --with-isl
--with-linker-hash-style=gnu --with-newlib
--with-sysroot=/usr/microblaze-linux-gnu/sys-root --with-system-libunwind
--with-system-zlib --without-headers

And the build:

make -C microblaze-linux-gnu -j16 tooldir=/usr all-gcc
make -C microblaze-linux-gnu -j16 tooldir=/usr all-target-libgcc

The microblaze binutils was binutils-2.25 plus the Fedora F21 patches from the
cross-binutils targetted at microblaze-linux-gnu.