[Bug target/49696] New: ICE on mips when compiling drizzle

["aurelien at aurel32 dot net" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=49696

           Summary: ICE on mips when compiling drizzle
           Product: gcc
           Version: 4.6.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: aurelien@aurel32.net
              Host: mips-unknown-linux-gnu
            Target: mips-unknown-linux-gnu
             Build: mips-unknown-linux-gnu


Created attachment 24731
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=24731
Testcase to reproduce the issue

When building drizzle on mips, g++ crash with an internal compiler error. The
problem is reproducible with versions 4.4, 4.5 and 4.6, but not with version
4.3 (I didn't test earlier versions). I have attached a reduced testcase.

$ g++ -c ./testcase-min.ii
./testcase-min.ii: In member function 'drizzled::internal::gcc_traits<T,
D>::value_type drizzled::internal::gcc_traits<T, D>::fetch(const volatile
value_type*) const volatile [with T = bool, D = bool,
drizzled::internal::gcc_traits<T, D>::value_type = bool]':
./testcase-min.ii:12:5: error: unrecognizable insn:
(insn 16 15 17 3 (parallel [
            (set (reg:SI 205)
                (mem/v:SI (reg:SI 200) [-1 S4 A32]))
            (set (mem/v:SI (reg:SI 200) [-1 S4 A32])
                (unspec_volatile:SI [
                        (reg:SI 203)
                        (reg:SI 204)
                        (plus:SI (reg:SI 205)
                            (const_int 0 [0]))
                    ] UNSPEC_SYNC_OLD_OP_12))
            (clobber (scratch:SI))
        ]) ./testcase-min.ii:11 -1
     (nil))
./testcase-min.ii:12:5: internal compiler error: in extract_insn, at
recog.c:2109
Please submit a full bug report,
with preprocessed source if appropriate.