[Bug target/68538] New: ICE in gen_reg_rtx, at emit-rtl.c:1027 when cross-compiling for cris-linux-gnu target

[dhowells at redhat dot com]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=68538

            Bug ID: 68538
           Summary: ICE in gen_reg_rtx, at emit-rtl.c:1027 when
                    cross-compiling for cris-linux-gnu target
           Product: gcc
           Version: 5.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: dhowells at redhat dot com
  Target Milestone: ---

Created attachment 36834
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=36834&action=edit
Test program

I'm getting the following when compiling for a cris-linux-gnu target with
gcc-5.2.1:

warthog>cris-linux-gnu-gcc -O2 -c output.c
output.c: In function ‘cfq_completed_request’:
output.c:51:1: internal compiler error: in gen_reg_rtx, at emit-rtl.c:1027
 }
 ^
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://bugzilla.redhat.com/bugzilla/> for instructions.
Preprocessed source stored into /tmp/cc89FntN.out file, please attach this to
your bugreport.

A testcase is attached.