[Bug target/69306] New: wrong code with int128 @ x32

["zsojka at seznam dot cz" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69306

            Bug ID: 69306
           Summary: wrong code with int128 @ x32
           Product: gcc
           Version: 6.0
            Status: UNCONFIRMED
          Keywords: wrong-code
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: zsojka at seznam dot cz
                CC: hjl at gcc dot gnu.org
  Target Milestone: ---
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnux32

Output:
$ x86_64-pc-linux-gnux32-gcc -v                
Using built-in specs.
COLLECT_GCC=/repo/gcc-trunk/binary-latest-x32/bin/x86_64-pc-linux-gnux32-gcc
COLLECT_LTO_WRAPPER=/repo/gcc-trunk/binary-trunk-232232-checking-yes-rtl-df-nographite-x32/bin/../libexec/gcc/x86_64-pc-linux-gnux32/6.0.0/lto-wrapper
Target: x86_64-pc-linux-gnux32
Configured with: /repo/gcc-trunk//configure --enable-languages=c,c++
--enable-checking=yes,rtl,df --without-cloog --without-ppl --without-isl
--with-abi=mx32 --build=x86_64-pc-linux-gnu --host=x86_64-pc-linux-gnu
--target=x86_64-pc-linux-gnux32 --with-ld=/usr/bin/x86_64-pc-linux-gnux32-ld
--with-as=/usr/bin/x86_64-pc-linux-gnux32-as
--with-sysroot=/usr/x86_64-pc-linux-gnux32 --disable-libstdcxx-pch
--prefix=/repo/gcc-trunk//binary-trunk-232232-checking-yes-rtl-df-nographite-x32
Thread model: posix
gcc version 6.0.0 20160111 (experimental) (GCC) 

$ x86_64-pc-linux-gnux32-gcc testcase.c
$ ./a.out 
33000000010000000000000000000000
Aborted

The output should be "460000..." (the same as in PR69305)

Tested revisions:
trunk r232232 - FAIL
5-branch r231950 - FAIL
4_9-branch r231949 - FAIL
4_8-branch r224828 - FAIL