GCC build failure, HEAD@185026 on native

[GCC regression tester]

With your recent patch, GCC HEAD revision 185026 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 185025.

Log information for changes since the last build:
------------------------------------------------------------------------
r185026 | rguenth | 2012-03-07 01:24:40 -0800 (Wed, 07 Mar 2012) | 5 lines
Changed paths:
   M /trunk/gcc/ChangeLog
   M /trunk/gcc/tree-ssa-math-opts.c

2012-03-07  Richard Guenther  <rguenther@suse.de>

	* tree-ssa-math-opts.c (convert_mult_to_widen): Check actual
	precision against gimple constraints.

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

For more information, see <http://glutton.geoffk.org/HEAD/>.

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/home/regress/tbox/svn-gcc/libgcc/config/libbid/bid128_fma.c:249:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[3]: *** [bid128_fma.o] Error 1
make[3]: *** Waiting for unfinished jobs....
/home/regress/tbox/svn-gcc/libgcc/config/libbid/bid_binarydecimal.c: In function '__bid32_to_binary32':
/home/regress/tbox/svn-gcc/libgcc/config/libbid/bid_binarydecimal.c:144038:1: internal compiler error: Segmentation fault
Please submit a full bug report,
with preprocessed source if appropriate.
See <http://gcc.gnu.org/bugs.html> for instructions.
make[3]: *** [bid_binarydecimal.o] Error 1
make[3]: Leaving directory `/home/regress/tbox/native/build/i686-pc-linux-gnu/libgcc'
make[2]: *** [all-stage1-target-libgcc] Error 2
make[2]: Leaving directory `/home/regress/tbox/native/build'
make[1]: *** [stage1-bubble] Error 2
make[1]: Leaving directory `/home/regress/tbox/native/build'
make: *** [bootstrap] Error 2
+ '[' -s .bad_compare ']'
+ exit 1
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-- 
Geoffrey Keating <geoffk@geoffk.org> 
(via an automated GCC regression-testing script.)