Internal compiler error during powerpc-eabispe cross-compile of gcc.

Full build log and save-temps output attached.

Here is the output of -v -save-temps for the affected file:

patrick@gtr:~/src/e7/toolchain/build/gcc-4.9.0-stage2/powerpc-eabispe/mpc7400/libgcc$ /home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/xgcc -v -save-temps -B/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/ -B/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/bin/ -B/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/lib/ -isystem /home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/include -isystem /home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/sys-include    -g -O2 -msoft-float -O2  -g -O2 -DIN_GCC  -DCROSS_DIRECTORY_STRUCTURE  -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem ./include   -g -DIN_LIBGCC2 -fbuilding-libgcc -fno-stack-protector -Dinhibit_libc  -I. -I. -I../../.././gcc -I/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc -I/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/. -I/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../gcc -I/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../include  -DHAVE_CC_TLS  -o _addsub_df.o -MT _addsub_df.o -MD -MP -MF _addsub_df.dep -DFINE_GRAINED_LIBRARIES -DL_addsub_df  -c /home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/fp-bit.c -fvisibility=hidden -DHIDE_EXPORTS
Reading specs from /home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/specs
COLLECT_GCC=/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/xgcc
Target: powerpc-eabispe
Configured with: /home/patrick/src/e7/toolchain/src/gcc-4.9.0/configure --prefix=/home/patrick/src/e7/toolchain/stage2 --build=x86_64-unknown-linux-gnu --host=x86_64-unknown-linux-gnu --target=powerpc-eabispe --enable-languages=c,c++ --with-sysroot=/home/patrick/src/e7/toolchain/../prex_sysroot --disable-nls --disable-werror --with-newlib --with-gmp=/home/patrick/src/e7/toolchain/stage2 --with-mpfr=/home/patrick/src/e7/toolchain/stage2 --disable-shared --disable-debug --disable-libssp --with-cpu=8540
Thread model: single
gcc version 4.9.0 (GCC) 
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-B' '/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/' '-B' '/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/bin/' '-B' '/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/lib/' '-isystem' '/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/include' '-isystem' '/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/sys-include' '-g' '-O2' '-msoft-float' '-O2' '-g' '-O2' '-D' 'IN_GCC' '-D' 'CROSS_DIRECTORY_STRUCTURE' '-Wextra' '-Wall' '-Wno-narrowing' '-Wwrite-strings' '-Wcast-qual' '-Wstrict-prototypes' '-Wmissing-prototypes' '-Wold-style-definition' '-isystem' './include' '-g' '-D' 'IN_LIBGCC2' '-fbuilding-libgcc' '-fno-stack-protector' '-D' 'inhibit_libc' '-I' '.' '-I' '.' '-I' '../../.././gcc' '-I' '/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc' '-I' '/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/.' '-I' '/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../gcc' '-I' '/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../include' '-D' 'HAVE_CC_TLS' '-o' '_addsub_df.o' '-MT' '_addsub_df.o' '-MD' '-MP' '-MF' '_addsub_df.dep' '-D' 'FINE_GRAINED_LIBRARIES' '-D' 'L_addsub_df' '-c' '-fvisibility=hidden' '-D' 'HIDE_EXPORTS' '-mcpu=8540'
 /home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/cc1 -E -quiet -v -I . -I . -I ../../.././gcc -I /home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc -I /home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/. -I /home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../gcc -I /home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../include -imultilib nof -iprefix /home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/gcc/../lib/gcc/powerpc-eabispe/4.9.0/ -isystem /home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/include -isystem /home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/include-fixed -MD _addsub_df.d -MF _addsub_df.dep -MP -MT _addsub_df.o -D IN_GCC -D CROSS_DIRECTORY_STRUCTURE -D IN_LIBGCC2 -D inhibit_libc -D HAVE_CC_TLS -D FINE_GRAINED_LIBRARIES -D L_addsub_df -D HIDE_EXPORTS -isystem /home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/include -isystem /home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/sys-include -isystem ./include /home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/fp-bit.c -msoft-float -mcpu=8540 -Wextra -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -fbuilding-libgcc -fno-stack-protector -fvisibility=hidden -g -g -g -fworking-directory -O2 -O2 -O2 -fpch-preprocess -o fp-bit.i
ignoring nonexistent directory "/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/include"
ignoring nonexistent directory "/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/sys-include"
ignoring nonexistent directory "./include"
ignoring nonexistent directory "/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/gcc/../lib/gcc/powerpc-eabispe/4.9.0/include"
ignoring nonexistent directory "/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/gcc/../lib/gcc/powerpc-eabispe/4.9.0/include-fixed"
ignoring nonexistent directory "/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/gcc/../lib/gcc/powerpc-eabispe/4.9.0/../../../../powerpc-eabispe/include"
ignoring nonexistent directory "/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/gcc/../lib/gcc/../../lib/gcc/powerpc-eabispe/4.9.0/include"
ignoring nonexistent directory "/home/patrick/src/e7/toolchain/../prex_sysroot/usr/local/include"
ignoring nonexistent directory "/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/gcc/../lib/gcc/../../lib/gcc/powerpc-eabispe/4.9.0/include-fixed"
ignoring nonexistent directory "/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/gcc/../lib/gcc/../../lib/gcc/powerpc-eabispe/4.9.0/../../../../powerpc-eabispe/include"
ignoring duplicate directory "."
ignoring duplicate directory "/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/."
#include "..." search starts here:
#include <...> search starts here:
 .
 ../../.././gcc
 /home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc
 /home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../gcc
 /home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../include
 /home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/include
 /home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/include-fixed
 /home/patrick/src/e7/toolchain/../prex_sysroot/usr/include
End of search list.
COLLECT_GCC_OPTIONS='-v' '-save-temps' '-B' '/home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/' '-B' '/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/bin/' '-B' '/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/lib/' '-isystem' '/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/include' '-isystem' '/home/patrick/src/e7/toolchain/stage2/powerpc-eabispe/sys-include' '-g' '-O2' '-msoft-float' '-O2' '-g' '-O2' '-D' 'IN_GCC' '-D' 'CROSS_DIRECTORY_STRUCTURE' '-Wextra' '-Wall' '-Wno-narrowing' '-Wwrite-strings' '-Wcast-qual' '-Wstrict-prototypes' '-Wmissing-prototypes' '-Wold-style-definition' '-isystem' './include' '-g' '-D' 'IN_LIBGCC2' '-fbuilding-libgcc' '-fno-stack-protector' '-D' 'inhibit_libc' '-I' '.' '-I' '.' '-I' '../../.././gcc' '-I' '/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc' '-I' '/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/.' '-I' '/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../gcc' '-I' '/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/../include' '-D' 'HAVE_CC_TLS' '-o' '_addsub_df.o' '-MT' '_addsub_df.o' '-MD' '-MP' '-MF' '_addsub_df.dep' '-D' 'FINE_GRAINED_LIBRARIES' '-D' 'L_addsub_df' '-c' '-fvisibility=hidden' '-D' 'HIDE_EXPORTS' '-mcpu=8540'
 /home/patrick/src/e7/toolchain/build/gcc-4.9.0-stage2/./gcc/cc1 -fpreprocessed fp-bit.i -quiet -dumpbase fp-bit.c -msoft-float -mcpu=8540 -auxbase-strip _addsub_df.o -g -g -g -O2 -O2 -O2 -Wextra -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition -version -fbuilding-libgcc -fno-stack-protector -fvisibility=hidden -o fp-bit.s
GNU C (GCC) version 4.9.0 (powerpc-eabispe)
	compiled by GNU C version 4.8.1, GMP version 5.0.1, MPFR version 3.1.2, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
GNU C (GCC) version 4.9.0 (powerpc-eabispe)
	compiled by GNU C version 4.8.1, GMP version 5.0.1, MPFR version 3.1.2, MPC version 0.9
GGC heuristics: --param ggc-min-expand=100 --param ggc-min-heapsize=131072
Compiler executable checksum: 9367011cb3bc9da481a2ead1c4530711
/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/fp-bit.c: In function '_fpadd_parts':
/home/patrick/src/e7/toolchain/src/gcc-4.9.0/libgcc/fp-bit.c:738:1: internal compiler error: in dwf_regno, at dwarf2cfi.c:909
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.