[Bug bootstrap/68663] Build failure on AIX 7.1

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68663

--- Comment #8 from The Written Word <bugzilla-gcc at thewrittenword dot com> ---
(In reply to The Written Word from comment #6)
> gcc-5.5.0 and 7.2.0 errored out in the same way but I am able to build
> gcc-8.1.0 successfully. gcc-6.4.0 seems to have built insn-output.c
> successfully.

gcc-6.4.0 just died somewhere else with the same error:
g++ -std=gnu++98 -fno-PIE -c   -g -DIN_GCC     -fno-exceptions -fno-rtti
-fasync
hronous-unwind-tables -W -Wall -Wwrite-strings -Wcast-qual -Wno-format
-Wmissing
-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long
-Wno-variadic-ma
cros -Wno-overlength-strings -fno-common  -DHAVE_CONFIG_H -I. -I.
-I/opt/build/c
hina/gcc-6.4.0/gcc -I/opt/build/china/gcc-6.4.0/gcc/.
-I/opt/build/china/gcc-6.4
.0/gcc/../include -I./../intl
-I/opt/build/china/gcc-6.4.0/gcc/../libcpp/include
 -I/opt/TWWfsw/libgmp61/include -I/opt/TWWfsw/libmpfr31/include
-I/opt/TWWfsw/li
bmpc10/include  -I/opt/build/china/gcc-6.4.0/gcc/../libdecnumber
-I/opt/build/ch
ina/gcc-6.4.0/gcc/../libdecnumber/dpd -I../libdecnumber
-I/opt/build/china/gcc-6
.4.0/gcc/../libbacktrace -I/opt/TWWfsw/libisl016/include  -o rs6000.o -MT
rs6000
.o -MMD -MP -MF ./.deps/rs6000.TPo
/opt/build/china/gcc-6.4.0/gcc/config/rs6000/
rs6000.c
/tmp//ccsn8s2Z.s: Assembler messages:
/tmp//ccsn8s2Z.s:177152: Error: value of 0000000000010000 too large for field
of
 2 bytes at 000000000007e722
/tmp//ccsn8s2Z.s:177680: Error: value of 0000000000010004 too large for field
of
 2 bytes at 000000000007ed12
/tmp//ccsn8s2Z.s:178850: Error: value of 0000000000010008 too large for field
of
 2 bytes at 000000000007fb5e
/tmp//ccsn8s2Z.s:179521: Error: value of 000000000001000c too large for field
of
 2 bytes at 0000000000080246
...