[Bug target/63534] [5 Regression] Bootstrap failure on x86_64/i686-linux

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63534

--- Comment #9 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
r216154 broke bootstrap on x86_64-apple-darwin13 too while building
libstdc++-v3:

libtool: compile:  /opt/gcc/p_build/./gcc/xgcc -shared-libgcc
-B/opt/gcc/p_build/./gcc -nostdinc++
-L/opt/gcc/p_build/x86_64-apple-darwin13.4.0/i386/libstdc++-v3/src
-L/opt/gcc/p_build/x86_64-apple-darwin13.4.0/i386/libstdc++-v3/src/.libs
-L/opt/gcc/p_build/x86_64-apple-darwin13.4.0/i386/libstdc++-v3/libsupc++/.libs
-B/opt/gcc/gcc4.10p-216154/x86_64-apple-darwin13.4.0/bin/
-B/opt/gcc/gcc4.10p-216154/x86_64-apple-darwin13.4.0/lib/ -isystem
/opt/gcc/gcc4.10p-216154/x86_64-apple-darwin13.4.0/include -isystem
/opt/gcc/gcc4.10p-216154/x86_64-apple-darwin13.4.0/sys-include -m32
-I/opt/gcc/p_work/libstdc++-v3/../libgcc
-I/opt/gcc/p_build/x86_64-apple-darwin13.4.0/i386/libstdc++-v3/include/x86_64-apple-darwin13.4.0
-I/opt/gcc/p_build/x86_64-apple-darwin13.4.0/i386/libstdc++-v3/include
-I/opt/gcc/p_work/libstdc++-v3/libsupc++ -D_GLIBCXX_SHARED
-fno-implicit-templates -Wall -Wextra -Wwrite-strings -Wcast-qual -Wabi
-fdiagnostics-show-location=once -fvisibility-inlines-hidden
-ffunction-sections -fdata-sections -frandom-seed=atexit_thread.lo -g -O2 -m32
-std=gnu++11 -c ../../../../../p_work/libstdc++-v3/libsupc++/atexit_thread.cc 
-fno-common -DPIC -D_GLIBCXX_SHARED -o atexit_thread.o
../../../../../p_work/libstdc++-v3/libsupc++/atexit_thread.cc: In function
'void {anonymous}::key_init()':
../../../../../p_work/libstdc++-v3/libsupc++/atexit_thread.cc:111:3: internal
compiler error: in cselib_invalidate_regno, at cselib.c:2146
   }
   ^

../../../../../p_work/libstdc++-v3/libsupc++/atexit_thread.cc:111:3: internal
compiler error: Abort trap: 6
xgcc: internal compiler error: Abort trap: 6 (program cc1plus)