Someone

stage1/xgcc -Bstage1/ -B/usr/powerpc-unknown-linux-gnu/bin/ -c   -mcpu=7450 -O2 -pipe -DIN_GCC   -W -Wall -Wwrite
-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros -Wold-style-defin
ition -Wmissing-format-attribute     -DHAVE_CONFIG_H -I. -I. -I/var/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc -I/v
ar/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/. -I/var/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/../include -I/var/t
mp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/../libcpp/include     /var/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/tree-
ssa-reassoc.c -o tree-ssa-reassoc.o
/var/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/tree-vrp.c: In function 'extract_range_from_binary_expr':
/var/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/tree-vrp.c:1452: error: BB_RTL flag not set for block 91
/var/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/tree-vrp.c:1452: internal compiler error: verify_flow_info failed
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:http://bugs.gentoo.org/> for instructions.
stage1/xgcc -Bstage1/ -B/usr/powerpc-unknown-linux-gnu/bin/ -c   -mcpu=7450 -O2 -pipe -DIN_GCC   -W -Wall -Wwrite
-strings -Wstrict-prototypes -Wmissing-prototypes -pedantic -Wno-long-long -Wno-variadic-macros -Wold-style-defin
ition -Wmissing-format-attribute     -DHAVE_CONFIG_H -I. -I. -I/var/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc -I/v
ar/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/. -I/var/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/../include -I/var/t
mp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/../libcpp/include     /var/tmp/portage/gcc-4.1.1/work/gcc-4.1.1/gcc/tree-
ssa-structalias.c -o tree-ssa-structalias.o
The bug is not reproducible, so it is likely a hardware or OS problem.
make[2]: *** [tree-vrp.o] Error 1
make[2]: *** Waiting for unfinished jobs....
make[2]: Leaving directory `/var/tmp/portage/gcc-4.1.1/work/build/gcc'
make[1]: *** [stage2_build] Error 2
make[1]: Leaving directory `/var/tmp/portage/gcc-4.1.1/work/build/gcc'
make: *** [bootstrap-lean] Error 2
            
!!! ERROR: sys-devel/gcc-4.1.1 failed.
Call stack: 
  ebuild.sh, line 1539:   Called dyn_compile
  ebuild.sh, line 939:   Called src_compile
  ebuild.sh, line 1248:   Called toolchain_src_compile
  toolchain.eclass, line 24:   Called gcc_src_compile
  toolchain.eclass, line 1523:   Called gcc_do_make
  toolchain.eclass, line 1397:   Called die