m68k does not build on head

["Joel Sherrill <joel at OARcorp dot com>" <joel dot sherrill at OARcorp dot com>]

Doing an overnight build of all rtems targets, I can across this
new breakage for m68k-rtems4.7.  I last built this target on Nov 3
from the head and it compiled then.


/home/joel/gcc-work/head/b-m68k-rtems4.7/./gcc/xgcc 
-B/home/joel/gcc-work/head/b-m68k-rtems4.7/./gcc/ -nostdinc 
-B/home/joel/gcc-work/head/b-m68k-rtems4.7/m68k-rtems4.7/newlib/ 
-isystem 
/home/joel/gcc-work/head/b-m68k-rtems4.7/m68k-rtems4.7/newlib/targ-include 
-isystem /home/joel/gcc-work/head/gcc-head-test/newlib/libc/include 
-B/home/joel/gcc-41-test//m68k-rtems4.7/bin/ 
-B/home/joel/gcc-41-test//m68k-rtems4.7/lib/ -isystem 
/home/joel/gcc-41-test//m68k-rtems4.7/include -isystem 
/home/joel/gcc-41-test//m68k-rtems4.7/sys-include -c -DHAVE_CONFIG_H -O2 
-g -O2  -I. -I../../../gcc-head-test/libiberty/../include  -W -Wall 
-pedantic -Wwrite-strings -Wstrict-prototypes 
../../../gcc-head-test/libiberty/getopt1.c -o geto
pt1.o 
        ../../../gcc-head-test/libiberty/regex.c: In function 
'byte_common_op_match_null_string_p': 

../../../gcc-head-test/libiberty/regex.c:7724: error: insn does not 
satisfy its constraints: 
                    (insn 158 85 159 8 
../../../gcc-head-test/libiberty/regex.c:7699 (set (reg:SI 2 %d2) 

      (sign_extend:SI (reg:HI 1 %d1 [59]))) 65 {*68k_extendhisi2} (nil) 
          (nil)) 
               ../../../gcc-head-test/libiberty/regex.c:7724: internal 
compiler error: in reload_cse_simplify_operands, at postreload.c:393 


This is with gcc SVN head as of yesterday afternoon, binutils 2.16.1 and 
newlib 1.13.0.

I can file a PR but this is definitely a recent breakage.

--
Joel Sherrill, Ph.D.             Director of Research & Development
joel@OARcorp.com                 On-Line Applications Research
Ask me about RTEMS: a free RTOS  Huntsville AL 35805
   Support Available             (256) 722-9985