GCC build failure, HEAD@166978 on native

[regress]

With your recent patch, GCC HEAD revision 166978 had problems on:
native: build (about the same as the previous build)
Attached is build output for those targets.
The previous build was of revision 166977.

Log information for changes since the last build:
------------------------------------------------------------------------
r166978 | pkoning | 2010-11-20 11:11:32 -0800 (Sat, 20 Nov 2010) | 16 lines
Changed paths:
   M /trunk/gcc/ChangeLog
   M /trunk/gcc/config/pdp11/pdp11-protos.h
   M /trunk/gcc/config/pdp11/pdp11.c
   M /trunk/gcc/config/pdp11/pdp11.h
   M /trunk/gcc/config/pdp11/pdp11.md

* config/pdp11/pdp11-protos.h (pdp11_initial_elimination_offset,
pdp11_regno_reg_class): New functions.
* config/pdp11/pdp11.md (define_constants): Add register numbers.
* config/pdp11/pdp11.c (pdp11_regno_reg_class,
pdp11_sp_frame_offset, pdp11_initial_elimination_offset): New
functions. 
* config/pdp11/pdp11.h (FIXED_REGISTERS, CALL_USED_REGISTERS): Add
frame pointer and argument pointer pseudo-registers.
(ARG_POINTER_REGNUM): Define.
(REG_CLASS_CONTENTS, REGNO_REG_CLASS): Add frame pointer and
argument pointer. 
(FIRST_PARM_OFFSET): Update for argument pointer.
(INITIAL_FRAME_POINTER_OFFSET): Delete.
(ELIMINABLE_REGS, INITIAL_ELIMINATION_OFFSET): New macros.
(REGNO_OK_FOR_BASE_P, REGNO_OK_FOR_INDEX_P, REGISTER_NAMES): Add
frame pointer and argument pointer. 
------------------------------------------------------------------------

For more information, see <http://gcc.gnu.org/regtest/HEAD/>.

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makeinfo --split-size=5000000 --split-size=5000000 --split-size=5000000  -I /Users/regress/tbox/svn-gcc/libgomp/../gcc/doc/include -I /Users/regress/tbox/svn-gcc/libgomp -o libgomp.info /Users/regress/tbox/svn-gcc/libgomp/libgomp.texi
/bin/sh ./libtool --tag=CC   --mode=compile /Users/regress/tbox/native/build/./gcc/xgcc -B/Users/regress/tbox/native/build/./gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/lib/ -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/include -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/sys-include    -DHAVE_CONFIG_H -I. -I/Users/regress/tbox/svn-gcc/libgomp  -I/Users/regress/tbox/svn-gcc/libgomp/config/bsd -I/Users/regress/tbox/svn-gcc/libgomp/config/posix -I/Users/regress/tbox/svn-gcc/libgomp  -Wall -Werror -Wc,-pthread -g -O2 -MT alloc.lo -MD -MP -MF .deps/alloc.Tpo -c -o alloc.lo /Users/regress/tbox/svn-gcc/libgomp/alloc.c
/bin/sh ./libtool --tag=CC   --mode=compile /Users/regress/tbox/native/build/./gcc/xgcc -B/Users/regress/tbox/native/build/./gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/lib/ -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/include -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/sys-include    -DHAVE_CONFIG_H -I. -I/Users/regress/tbox/svn-gcc/libgomp  -I/Users/regress/tbox/svn-gcc/libgomp/config/bsd -I/Users/regress/tbox/svn-gcc/libgomp/config/posix -I/Users/regress/tbox/svn-gcc/libgomp  -Wall -Werror -Wc,-pthread -g -O2 -MT barrier.lo -MD -MP -MF .deps/barrier.Tpo -c -o barrier.lo /Users/regress/tbox/svn-gcc/libgomp/barrier.c
libtool: compile:  /Users/regress/tbox/native/build/./gcc/xgcc -B/Users/regress/tbox/native/build/./gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/lib/ -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/include -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/sys-include -DHAVE_CONFIG_H -I. -I/Users/regress/tbox/svn-gcc/libgomp -I/Users/regress/tbox/svn-gcc/libgomp/config/bsd -I/Users/regress/tbox/svn-gcc/libgomp/config/posix -I/Users/regress/tbox/svn-gcc/libgomp -Wall -pthread -Werror -g -O2 -MT alloc.lo -MD -MP -MF .deps/alloc.Tpo -c /Users/regress/tbox/svn-gcc/libgomp/alloc.c  -fno-common -DPIC -o .libs/alloc.o
libtool: compile:  /Users/regress/tbox/native/build/./gcc/xgcc -B/Users/regress/tbox/native/build/./gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/lib/ -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/include -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/sys-include -DHAVE_CONFIG_H -I. -I/Users/regress/tbox/svn-gcc/libgomp -I/Users/regress/tbox/svn-gcc/libgomp/config/bsd -I/Users/regress/tbox/svn-gcc/libgomp/config/posix -I/Users/regress/tbox/svn-gcc/libgomp -Wall -pthread -Werror -g -O2 -MT barrier.lo -MD -MP -MF .deps/barrier.Tpo -c /Users/regress/tbox/svn-gcc/libgomp/barrier.c  -fno-common -DPIC -o .libs/barrier.o
/Users/regress/tbox/svn-gcc/libgomp/barrier.c:41:1: internal compiler error: in decide_is_variable_needed, at varpool.c:338
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[5]: *** [barrier.lo] Error 1
make[5]: *** Waiting for unfinished jobs....
libtool: compile:  /Users/regress/tbox/native/build/./gcc/xgcc -B/Users/regress/tbox/native/build/./gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/lib/ -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/include -isystem /Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/sys-include -DHAVE_CONFIG_H -I. -I/Users/regress/tbox/svn-gcc/libgomp -I/Users/regress/tbox/svn-gcc/libgomp/config/bsd -I/Users/regress/tbox/svn-gcc/libgomp/config/posix -I/Users/regress/tbox/svn-gcc/libgomp -Wall -pthread -Werror -g -O2 -MT alloc.lo -MD -MP -MF .deps/alloc.Tpo -c /Users/regress/tbox/svn-gcc/libgomp/alloc.c -o alloc.o >/dev/null 2>&1
mv -f .deps/alloc.Tpo .deps/alloc.Plo
make[4]: *** [all-recursive] Error 1
make[3]: *** [all] Error 2
make[2]: *** [all-stage1-target-libgomp] Error 2
make[1]: *** [stage1-bubble] Error 2
make: *** [bootstrap] Error 2
+ '[' -s .bad_compare ']'
+ exit 1
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-- 
Geoffrey Keating <geoffk@apple.com> 
(via an automated GCC regression-testing script.)