Comment 3 for bug 1065122

Thank you for the bug report. I've confirmed this with gcc-linaro-4.7-2012.09 on ARM:

arm-linux-gnueabihf-gcc -c -g cluster.ii
cluster.cc: In member function ‘bool rpc::node::set_role(rpc::role_type)’:
cluster.cc:88:1: error: unrecognizable insn:
(insn 16 15 17 3 (parallel [
            (set (reg:CC_Z 24 cc)
                (unspec_volatile:CC_Z [
                        (const_int 0 [0])
                    ] VUNSPEC_ATOMIC_CAS))
            (set (reg:SI 146)
                (zero_extend:SI (mem/v:HI (reg/f:SI 134 [ D.146641 ]) [-1 S2 A16])))
            (set (mem/v:HI (reg/f:SI 134 [ D.146641 ]) [-1 S2 A16])
                (unspec_volatile:HI [
                        (reg:HI 147)
                        (subreg/s/u:HI (reg:SI 135 [ D.146642 ]) 0)
                        (const_int 0 [0])
                        (const_int 5 [0x5])
                        (const_int 5 [0x5])
                    ] VUNSPEC_ATOMIC_CAS))
            (clobber (scratch:SI))
        ]) cluster.cc:87 -1
     (nil))
cluster.cc:88:1: internal compiler error: in extract_insn, at recog.c:2123
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://bugs.launchpad.net/gcc-linaro> for instructions.