[Bug bootstrap/12400] New: Bootstrap ICE with -O

["suckfish at ihug dot co dot nz" <gcc-bugzilla at gcc dot gnu dot org>]

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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=12400

           Summary: Bootstrap ICE with -O
           Product: gcc
           Version: 3.4
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: bootstrap
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: suckfish at ihug dot co dot nz
                CC: gcc-bugs at gcc dot gnu dot org

Building from cvs on i686-pc-linux-gnu with

CFLAGS='-O -g3' LIBCFLAGS='-O -g3'  LIBCXXFLAGS='-O -g3' CXXFLAGS='-O -g3'
../gcc/configure --prefix=/home/ralph/dev/test --enable-languages=c,c++,java

make CFLAGS='-O -g3' LIBCFLAGS='-O -g3'  LIBCXXFLAGS='-O -g3' bootstrap

fails with an ICE during the PIC build of libjava/verify.cc

(building from the same source tree with ../gcc/configure;make bootstrap is ok)

../../../gcc/libjava/verify.cc: In member function `void
_Jv_BytecodeVerifier::verify_instructions_0()':
../../../gcc/libjava/verify.cc:95: error: unrecognizable insn:
(insn 440021 3080 440022 211 ../../../gcc/libjava/verify.cc:553 (set (reg:CC 17
flags)
        (compare:CC (mem:QI (plus:SI (mem/s/j:SI (plus:SI (reg/v/f:SI 1134 [ copy ])
                            (const_int 16 [0x10])) [0 <variable>.local_changed+0
S4 A32])
                    (reg/v:SI 1162 [ i ])) [0 S1 A8])
            (const_int 1 [0x1]))) -1 (nil)
    (nil))
../../../gcc/libjava/verify.cc:95: internal compiler error: in extract_insn, at
recog.c:2064
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