[Bug bootstrap/51118] New: ICE when bootstrapping on Ubuntu 11.10/amd64 with stage1 checking enabled

["matt at use dot net" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51118

             Bug #: 51118
           Summary: ICE when bootstrapping on Ubuntu 11.10/amd64 with
                    stage1 checking enabled
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: matt@use.net


$ ../configure --enable-bootstrap --prefix=/home/matt --enable-languages=c,c++
--enable-stage1-checking=all
[...]
$ make
[...]

/home/matt/src/gcc-trunk/obj/./gcc/xgcc -B/home/matt/src/gcc-trunk/obj/./gcc/
-B/home/matt/x86_64-unknown-linux-gnu/bin/
-B/home/matt/x86_64-unknown-linux-gnu/lib/ -isystem
/home/matt/x86_64-unknown-linux-gnu/include -isystem
/home/matt/x86_64-unknown-linux-gnu/sys-include -g -O2 -m32 -O2 -g -O2 -DIN_GCC
-W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition -isystem ./include -fpic -g
-DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -fpic -I. -I.
-I../../.././gcc -I../../../../libgcc -I../../../../libgcc/.
-I../../../../libgcc/../gcc -I../../../../libgcc/../include
-I../../../../libgcc/config/libbid -DENABLE_DECIMAL_BID_FORMAT -DHAVE_CC_TLS
-DUSE_TLS -o _muldi3.o -MT _muldi3.o -MD -MP -MF _muldi3.dep -DL_muldi3 -c
../../../../libgcc/libgcc2.c -fvisibility=hidden -DHIDE_EXPORTS
../../../../libgcc/libgcc2.c: In function __muldi3:
../../../libgcc/libgcc2.c:553:3: internal compiler error: tree check: expected
tree that contains âtypedâ structure, have âblockâ in fold_checksum_tree, at
fold-const.c:14160


I get the same results when setting CC and CXX to be gcc-4.4 and g++-4.4
respectively (the default system compiler on Ubuntu 11.10 is 4.6.1-based).

Running the commandline that causes the ICE with -O1 also elicits the problem.
Setting BOOT_CFLAGS and CFLAGS to -O1 doesn't help matters.