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Subject: [Bug target/46883] New: GCC ICE with  error: unrecognizable insn
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D46883

           Summary: GCC ICE with  error: unrecognizable insn
           Product: gcc
           Version: 4.6.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: raj.khem@gmail.com
              Host: arm-oe-linux-gnueabi
            Target: arm-oe-linux-gnueabi
             Build: x86_64-linux


Created attachment 22704
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=3D22704
testcase

Attached testcase when compiled with gcc trunk segfaults at O1/Os/O2 for arm

$ arm-oe-linux-gnueabi-gcc -O2 -S a.c
/net/isis/home/kraj/a.c: In function =E2=80=98bar=E2=80=99:
/net/isis/home/kraj/a.c:11:1: error: unrecognizable insn:
(insn 149 93 97 4 /net/isis/home/kraj/a.c:9 (set (reg:SI 271)
        (and:SI (subreg:SI (mem:HI (post_inc:SI (reg:SI 248 [ ivtmp.42 ])) =
[2
S2 A16]) 0)
            (const_int 255 [0xff]))) -1 (expr_list:REG_INC (reg:SI 248 [
ivtmp.42 ])
        (nil)))
a.c:11:1: internal compiler error: in extract_insn, at recog.c:2103
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.


at Os/O1 it ICEs with=20

 internal compiler error: in elimination_costs_in_insn, at reload1.c:3639