[Bug other/54956] New: GCC 4.7.2: internal compiler error: in emit_move_insn, at expr.c:3435

["devurandom at gmx dot net" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54956

             Bug #: 54956
           Summary: GCC 4.7.2: internal compiler error: in emit_move_insn,
                    at expr.c:3435
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: other
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: devurandom@gmx.net


When configuring libstdc++v3 for CHOST/CTARGET=spu-elf:
configure:15317: checking for atomic builtins for bool
configure:15319: 
/var/tmp/portage/cross-spu-elf/gcc-4.7.2/work/build/./gcc/xgcc -shared-libgcc
-B/var/tmp/portage/cross-spu-elf/gcc-4.7.2/work/b
uild/./gcc -nostdinc++
-L/var/tmp/portage/cross-spu-elf/gcc-4.7.2/work/build/spu-elf/libstdc++-v3/src
-L/var/tmp/portage/cross-spu-elf/gcc-4.7.2/
work/build/spu-elf/libstdc++-v3/src/.libs -B/usr/spu-elf/bin/
-B/usr/spu-elf/lib/ -isystem /usr/spu-elf/include -isystem
/usr/spu-elf/sys-include
    -c -O0 -S  conftest.cpp >&5
configure: In function 'int main()':
configure:15309:47: internal compiler error: in emit_move_insn, at expr.c:3435
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugs.gentoo.org/> for instructions.
configure:15322: $? = 1
configure:15330: result: 

Code as found in gcc-4.7.2/libstdc++-v3/acinclude.m4:
       typedef bool atomic_type;
       atomic_type c1;
       atomic_type c2;
       atomic_type c3(0);
       __atomic_fetch_add(&c1, c2, __ATOMIC_RELAXED);
       __atomic_compare_exchange_n(&c1, &c2, c3, true, __ATOMIC_ACQ_REL,
                                   __ATOMIC_RELAXED);
       __atomic_test_and_set(&c1, __ATOMIC_RELAXED);
       __atomic_load_n(&c1, __ATOMIC_RELAXED);

Portage 2.2.0_alpha138 (default/linux/amd64/10.0, gcc-4.7.2, glibc-2.15-r2,
2.6.18-308.16.1.el5 x86_64)
=================================================================
System uname:
Linux-2.6.18-308.16.1.el5-x86_64-Quad-Core_AMD_Opteron-tm-_Processor_2352-with-gentoo-2.1
Timestamp of tree: Tue, 16 Oct 2012 21:45:01 +0000
distcc 3.1 x86_64-pc-linux-gnu [disabled]
app-shells/bash:          4.2_p37
dev-lang/python:          2.7.3-r2, 3.2.3::ambro-cross
sys-apps/baselayout:      2.1-r1
sys-apps/openrc:          0.9.8.4
sys-apps/sandbox:         2.5
sys-devel/autoconf:       2.68
sys-devel/automake:       1.11.6
sys-devel/binutils:       2.22-r1
sys-devel/gcc:            4.7.2
sys-devel/gcc-config:     1.7.3
sys-devel/libtool:        2.4-r1
sys-devel/make:           3.82-r3
sys-kernel/linux-headers: 3.4-r2 (virtual/os-headers)
sys-libs/glibc:           2.15-r2
Repositories: gentoo ambro-cross local sunrise
ACCEPT_KEYWORDS="amd64"
ACCEPT_LICENSE="* -@EULA"
CBUILD="x86_64-pc-linux-gnu"
CFLAGS="-pipe -O2 -march=opteron-sse3"
CHOST="x86_64-pc-linux-gnu"
CONFIG_PROTECT="/etc"
CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf
/etc/gentoo-release /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo"
CXXFLAGS="-pipe -O2 -march=opteron-sse3"
DISTDIR="/var/cache/portage/distfiles"
EMERGE_DEFAULT_OPTS="--usepkg --binpkg-respect-use --keep-going"
FCFLAGS="-O2 -pipe"
FEATURES="assume-digests binpkg-logs buildpkg config-protect-if-modified
distlocks ebuild-locks fixlafiles news parallel-fetch parallel-install p
reserve-libs protect-owned sandbox sfperms strict unknown-features-warn
unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync"
FFLAGS="-O2 -pipe"
GENTOO_MIRRORS="http://ftp.spline.inf.fu-berlin.de/mirrors/gentoo/
http://ftp-stud.fht-esslingen.de/pub/Mirrors/gentoo/ http://distfiles.gentoo.o
rg"
LDFLAGS="-Wl,-O1 -Wl,--as-needed -Wl,--hash-style=gnu"
PKGDIR="/var/cache/portage/packages"
PORTAGE_COMPRESS="xz"
PORTAGE_CONFIGROOT="/"
PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times --compress
--force --whole-file --delete --stats --human-readable --timeout=
180 --exclude=/distfiles --exclude=/local --exclude=/packages"
PORTAGE_TMPDIR="/var/tmp"
PORTDIR="/var/cache/portage/gentoo"
PORTDIR_OVERLAY="/var/lib/layman/ambro-cross /var/cache/portage/local
/var/cache/portage/overlays/sunrise"
[...]
Unset:  CPPFLAGS, CTARGET, INSTALL_MASK, LANG, LC_ALL, LINGUAS, MAKEOPTS,
PORTAGE_BUNZIP2_COMMAND, PORTAGE_COMPRESS_FLAGS, PORTAGE_RSYNC_EXTRA_OP
TS, USE_PYTHON