https://gcc.gnu.org/bugzilla/show_bug.cgi?id=63622

--- Comment #19 from howarth at bromo dot med.uc.edu ---
Apparently we need something along the lines of the  previously proposed IPA
ICF aliasing restriction patch, however when applied to current gcc trunk the
bootstrap fails at...

libtool: compile:  /sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/./gcc/xgcc
-shared-libgcc -B/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/./gcc
-nostdinc++
-L/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/x86_64-apple-darwin14.0.0/i386/libstdc++-v3/src
-L/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/x86_64-apple-darwin14.0.0/i386/libstdc++-v3/src/.libs
-L/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/x86_64-apple-darwin14.0.0/i386/libstdc++-v3/libsupc++/.libs
-B/sw/lib/gcc5.0/x86_64-apple-darwin14.0.0/bin/
-B/sw/lib/gcc5.0/x86_64-apple-darwin14.0.0/lib/ -isystem
/sw/lib/gcc5.0/x86_64-apple-darwin14.0.0/include -isystem
/sw/lib/gcc5.0/x86_64-apple-darwin14.0.0/sys-include -m32
-I/sw/src/fink.build/gcc50-5.0.0-1000/gcc-5.0-20141105/libstdc++-v3/../libgcc
-I/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/x86_64-apple-darwin14.0.0/i386/libstdc++-v3/include/x86_64-apple-darwin14.0.0
-I/sw/src/fink.build/gcc50-5.0.0-1000/darwin_objdir/x86_64-apple-darwin14.0.0/i386/libstdc++-v3/include
-I/sw/src/fink.build/gcc50-5.0.0-1000/gcc-5.0-20141105/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
../../../../../gcc-5.0-20141105/libstdc++-v3/libsupc++/atexit_thread.cc 
-fno-common -DPIC -D_GLIBCXX_SHARED -o atexit_thread.o
../../../../../gcc-5.0-20141105/libstdc++-v3/libsupc++/atexit_thread.cc: In
function ‘void {anonymous}::key_init()’:
../../../../../gcc-5.0-20141105/libstdc++-v3/libsupc++/atexit_thread.cc:111:3:
internal compiler error: in cselib_invalidate_regno, at cselib.c:2154
   }
   ^
libbacktrace could not find executable to open
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

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