[Bug target/64205] New: powerpc64-linux --with-cpu=G5 bootstrap failure

["amodra at gmail dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64205

            Bug ID: 64205
           Summary: powerpc64-linux --with-cpu=G5 bootstrap failure
           Product: gcc
           Version: 5.0
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: target
          Assignee: unassigned at gcc dot gnu.org
          Reporter: amodra at gmail dot com

Created attachment 34207
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=34207&action=edit
preprocessed source

revision 218414

/home/alan/build/ppc/gcc-virgin/./gcc/xgcc
-B/home/alan/build/ppc/gcc-virgin/./gcc/
-B/usr/local/powerpc64-unknown-linux-gnu/bin/ -B
/usr/local/powerpc64-unknown-linux-gnu/lib/ -isystem
/usr/local/powerpc64-unknown-linux-gnu/include -isystem
/usr/local/powerpc64-unknown-linux-gnu/sys-include -g -O2 -m32 -O2  -g -O2
-DIN_GCC -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wno-format
-Wstrict-prototypes -Wmissing-prototypes -Wold-style-definition  -isystem
./include   -fPIC -mlong-double-128 -mno-minimal-toc -g -DIN_LIBGCC2
-fbuilding-libgcc -fno-stack-protector -fPIC -mlong-double-128 -mno-minimal-toc
-I. -I. -I../../.././gcc -I/src/gcc-virgin/libgcc -I/src/gcc-virgin/libgcc/.
-I/src/gcc-virgin/libgcc/../gcc -I/src/gcc-virgin/libgcc/../include
-I/src/gcc-virgin/libgcc/../libdecnumber/dpd
-I/src/gcc-virgin/libgcc/../libdecnumber -DHAVE_CC_TLS  -o _addsub_sd.o -MT
_addsub_sd.o -MD -MP -MF _addsub_sd.dep -DFINE_GRAINED_LIBRARIES -DL_addsub_sd
-DWIDTH=32 -c /src/gcc-virgin/libgcc/dfp-bit.c
/src/gcc-virgin/libgcc/dfp-bit.c: In function '__dpd_addsd3':
/src/gcc-virgin/libgcc/dfp-bit.c:247:1: error: insn does not satisfy its
constraints:
 }
 ^
(insn 305 195 201 26 (set (reg/i:SD 33 1)
        (mem/c:SD (plus:SI (reg/f:SI 1 1)
                (const_int 84 [0x54])) [0 res32.c+0 S4 A32]))
/src/gcc-virgin/libgcc/dfp-bit.c:247 463 {movsd_hardfloat}
     (nil))

Seems to be caused by r217679.  r217678 is the last revision to bootstrap for
me.  Note that you can see the failure by compiling the attachment with -m32
-mcpu=G5 using any recent powerpc gcc.