[Bug target/54892] New: [4.7 Regression], ICE in extract_insn, at recog.c:2123

["doko at gcc dot gnu.org" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54892

             Bug #: 54892
           Summary: [4.7 Regression], ICE in extract_insn, at recog.c:2123
    Classification: Unclassified
           Product: gcc
           Version: 4.7.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: doko@gcc.gnu.org


Created attachment 28414
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=28414
preprocessed source

seen on arm-linux-gnueabi, works with the 4.6 branch, fails with the 4.7
branch:


$ g++-4.7 -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,