[Bug target/57909] New: [ARM] ICE with internal memcpy and -mno-unaligned-access

[yvan.roux at linaro dot org]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=57909

            Bug ID: 57909
           Summary: [ARM] ICE with internal memcpy and
                    -mno-unaligned-access
           Product: gcc
           Version: 4.9.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: yvan.roux at linaro dot org

Created attachment 30510
  --> http://gcc.gnu.org/bugzilla/attachment.cgi?id=30510&action=edit
reduced test case

compilling the attached reduced test case with the following command line
produces an ICE.

arm-linux-gnueabi-gcc -marm -march=armv7-a -mtune=cortex-a15
-mno-unaligned-access -c -o panic.o panic.i

panic.i: In function 'bug':
panic.i:10:1: error: unrecognizable insn:
 }
 ^
(insn 9 8 10 2 (set (reg:SI 114)
        (zero_extend:SI (unspec:HI [
                    (mem/u/c:HI (reg:SI 113) [0 MEM[(void *)"aa"]+0 S2 A32])
                ] UNSPEC_UNALIGNED_LOAD))) panic.i:9 -1
     (nil))
panic.i:10:1: internal compiler error: in extract_insn, at recog.c:2150