[Bug target/51235] New: ICE: in extract_insn, at recog.c:2137 (unrecognizable insn) with -O -ftree-vectorize -mavx2 -mxop

[zsojka at seznam dot cz]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=51235

             Bug #: 51235
           Summary: ICE: in extract_insn, at recog.c:2137 (unrecognizable
                    insn) with -O -ftree-vectorize -mavx2 -mxop
    Classification: Unclassified
           Product: gcc
           Version: 4.7.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: zsojka@seznam.cz
              Host: x86_64-pc-linux-gnu
            Target: x86_64-pc-linux-gnu


Created attachment 25865
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=25865
reduced testcase

Compiler output:
$ gcc -O -ftree-vectorize -mavx2 -mxop testcase.c 
testcase.c: In function 'foo':
testcase.c:13:1: error: unrecognizable insn:
(insn 74 73 75 12 (set (reg:V4DI 129)
        (gtu:V4DI (reg:V4DI 113 [ vect_var_.19 ])
            (reg:V4DI 128))) -1
     (nil))
testcase.c:13:1: internal compiler error: in extract_insn, at recog.c:2137
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.

Tested revisions:
r181508 - crash
r180540 - crash
r178498 - OK