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Trunk build failure on Itanium

I've been getting consistent build failures along the following lines for an
IA64/Linux build of the trunk:

/home/hboehm/gcc/gcc-build/gcc/xgcc -B/home/hboehm/gcc/gcc-build/gcc/
-B/home/hboehm/gcc/usr/ia64-unknown-linux/lib/ -isystem
/home/hboehm/gcc/usr/ia64-unknown-linux/include -O2   -DIN_GCC    -W -Wall
-Wwrite-strings -Wstrict-prototypes -Wmissing-prototypes -isystem ./include
-I../../gcc/gcc -I../../gcc/gcc/. -I../../gcc/gcc/config
-I../../gcc/gcc/../include  -DL_fixdfdi -c ../../gcc/gcc/libgcc2.c -o
../../gcc/gcc/libgcc2.c: In function `__fixdfti':
../../gcc/gcc/libgcc2.c:958: Internal compiler error in propagate_one_insn,
at flow.c:5312
Please submit a full bug report,
with preprocessed source if appropriate.
See <URL:> for instructions.
make[2]: *** [libgcc/./_fixdfdi.o] Error 1

This occurs for many, but not all, of the functions in libgcc2.c.  The
compilations works fine without the -O2.  I believe this is a fairly recent
regression, though I probably hadn't updated my tree on the IA64 machine for
a month or so.  I updated my tree a second time last night, and the failure
still occurred then.  The same tree builds on X86.

Has anyone else seen this?  Any suggestions/insights?


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