GCC build failure, HEAD@171769 on native

[regress]

With your recent patch, GCC HEAD revision 171769 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 171767.

Log information for changes since the last build:
------------------------------------------------------------------------
r171769 | froydnj | 2011-03-30 19:26:18 -0700 (Wed, 30 Mar 2011) | 4 lines
Changed paths:
   M /trunk/gcc/ChangeLog
   M /trunk/gcc/tree-cfg.c
   M /trunk/gcc/tree.h

	* tree.h (CASE_CHAIN): Define.
	* tree-cfg.c (edge_to_cases_cleanup, get_cases_for_edge): Use it.
	(gimple_redirect_edge_and_branch): Likewise.

------------------------------------------------------------------------

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

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	-DBUGURL="\"<http://gcc.gnu.org/bugs.html>\"" -c /Users/regress/tbox/svn-gcc/gcc/version.c -o version.o
/Users/regress/tbox/native/build/./prev-gcc/xgcc -B/Users/regress/tbox/native/build/./prev-gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -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    -c   -g -O2 -mdynamic-no-pic -gtoggle -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -Wold-style-definition -Wc++-compat -fno-common  -DHAVE_CONFIG_H -I. -I. -I/Users/regress/tbox/svn-gcc/gcc -I/Users/regress/tbox/svn-gcc/gcc/. -I/Users/regress/tbox/svn-gcc/gcc/../include -I./../intl -I/Users/regress/tbox/svn-gcc/gcc/../libcpp/include  -I/Users/regress/tbox/svn-gcc/gcc/../libdecnumber -I/Users/regress/tbox/svn-gcc/gcc/../libde
 cnumber/dpd -I../libdecnumber    /Users/regress/tbox/svn-gcc/gcc/vmsdbgout.c -o vmsdbgout.o
/Users/regress/tbox/native/build/./prev-gcc/xgcc -B/Users/regress/tbox/native/build/./prev-gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -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    -c   -g -O2 -mdynamic-no-pic -gtoggle -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -Wold-style-definition -Wc++-compat -fno-common  -DHAVE_CONFIG_H -I. -I. -I/Users/regress/tbox/svn-gcc/gcc -I/Users/regress/tbox/svn-gcc/gcc/. -I/Users/regress/tbox/svn-gcc/gcc/../include -I./../intl -I/Users/regress/tbox/svn-gcc/gcc/../libcpp/include  -I/Users/regress/tbox/svn-gcc/gcc/../libdecnumber -I/Users/regress/tbox/svn-gcc/gcc/../libde
 cnumber/dpd -I../libdecnumber    /Users/regress/tbox/svn-gcc/gcc/web.c -o web.o
/Users/regress/tbox/native/build/./prev-gcc/xgcc -B/Users/regress/tbox/native/build/./prev-gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -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    -c   -g -O2 -mdynamic-no-pic -gtoggle -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -Wold-style-definition -Wc++-compat -fno-common  -DHAVE_CONFIG_H -I. -I. -I/Users/regress/tbox/svn-gcc/gcc -I/Users/regress/tbox/svn-gcc/gcc/. -I/Users/regress/tbox/svn-gcc/gcc/../include -I./../intl -I/Users/regress/tbox/svn-gcc/gcc/../libcpp/include  -I/Users/regress/tbox/svn-gcc/gcc/../libdecnumber -I/Users/regress/tbox/svn-gcc/gcc/../libde
 cnumber/dpd -I../libdecnumber    /Users/regress/tbox/svn-gcc/gcc/xcoffout.c -o xcoffout.o
/Users/regress/tbox/native/build/./prev-gcc/xgcc -B/Users/regress/tbox/native/build/./prev-gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -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    -c   -g -O2 -mdynamic-no-pic -gtoggle -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -Wold-style-definition -Wc++-compat -fno-common  -DHAVE_CONFIG_H -I. -I. -I/Users/regress/tbox/svn-gcc/gcc -I/Users/regress/tbox/svn-gcc/gcc/. -I/Users/regress/tbox/svn-gcc/gcc/../include -I./../intl -I/Users/regress/tbox/svn-gcc/gcc/../libcpp/include  -I/Users/regress/tbox/svn-gcc/gcc/../libdecnumber -I/Users/regress/tbox/svn-gcc/gcc/../libde
 cnumber/dpd -I../libdecnumber    \
		/Users/regress/tbox/svn-gcc/gcc/config/rs6000/rs6000.c -o rs6000.o
/Users/regress/tbox/svn-gcc/gcc/config/rs6000/rs6000.c: In function 'rs6000_handle_option':
/Users/regress/tbox/svn-gcc/gcc/config/rs6000/rs6000.c:4195:7: error: unused variable 'isel' [-Werror=unused-variable]
/Users/regress/tbox/native/build/./prev-gcc/xgcc -B/Users/regress/tbox/native/build/./prev-gcc/ -B/Users/regress/tbox/objs/powerpc-apple-darwin9.8.0/bin/ -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    -c   -g -O2 -mdynamic-no-pic -gtoggle -DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes -Wmissing-prototypes -Wmissing-format-attribute -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings -Werror -Wold-style-definition -Wc++-compat -fno-common  -DHAVE_CONFIG_H -I. -I. -I/Users/regress/tbox/svn-gcc/gcc -I/Users/regress/tbox/svn-gcc/gcc/. -I/Users/regress/tbox/svn-gcc/gcc/../include -I./../intl -I/Users/regress/tbox/svn-gcc/gcc/../libcpp/include  -I/Users/regress/tbox/svn-gcc/gcc/../libdecnumber -I/Users/regress/tbox/svn-gcc/gcc/../libde
 cnumber/dpd -I../libdecnumber    -I. -I. -I/Users/regress/tbox/svn-gcc/gcc -I/Users/regress/tbox/svn-gcc/gcc/. -I/Users/regress/tbox/svn-gcc/gcc/../include -I./../intl -I/Users/regress/tbox/svn-gcc/gcc/../libcpp/include  -I/Users/regress/tbox/svn-gcc/gcc/../libdecnumber -I/Users/regress/tbox/svn-gcc/gcc/../libdecnumber/dpd -I../libdecnumber   \
		/Users/regress/tbox/svn-gcc/gcc/config/darwin.c
cc1: all warnings being treated as errors

make[3]: *** [rs6000.o] Error 1
make[3]: *** Waiting for unfinished jobs....
rm gcj-dbtool.pod gcov.pod jcf-dump.pod jv-convert.pod gcj.pod gc-analyze.pod cpp.pod gfdl.pod gij.pod gfortran.pod fsf-funding.pod gcc.pod grmic.pod
make[2]: *** [all-stage2-gcc] Error 2
make[1]: *** [stage2-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.)