[Bug bootstrap/50882] New: internal compiler error: in extract_insn, at recog.c:2109 on powerpc-ibm-aix5.3.0.0

["joerg dot richter at pdv-fs dot de" <gcc-bugzilla at gcc dot gnu dot org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50882

             Bug #: 50882
           Summary: internal compiler error: in extract_insn, at
                    recog.c:2109 on powerpc-ibm-aix5.3.0.0
    Classification: Unclassified
           Product: gcc
           Version: 4.6.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: bootstrap
        AssignedTo: unassigned@gcc.gnu.org
        ReportedBy: joerg.richter@pdv-fs.de


When building GCC 4.6.2 on AIX:

configure --enable-languages=c,c++ --disable-bootstrap --disable-nls
--with-local-prefix=/not_existing_directory --prefix=/tools/pkg/gcc/4.6.2
--with-ld=/bin/ld --with-as=/bin/as

make

  ...later...
/tools/inst/tmp/tmp/./gcc/xgcc -B/tools/inst/tmp/tmp/./gcc/
-B/tools/pkg/gcc/4.6.2/powerpc-ibm-aix5.3.0.0/bin/
-B/tools/pkg/gcc/4.6.2/powerpc-ibm-aix5.3.0.0/lib/ -isystem
/tools/pkg/gcc/4.6.2/powerpc-ibm-aix5.3.0.0/include -isystem
/tools/pkg/gcc/4.6.2/powerpc-ibm-aix5.3.0.0/sys-include    -g -O2 -O2  -g -O2
-DIN_GCC   -W -Wall -Wwrite-strings -Wcast-qual -Wstrict-prototypes
-Wmissing-prototypes -Wold-style-definition  -isystem ./include 
-mlong-double-128 -g -DHAVE_GTHR_DEFAULT -DIN_LIBGCC2 -D__GCC_FLOAT_NOT_NEEDED
-fno-stack-protector   -I. -I. -I../.././gcc -I../../gcc-4.6.2/libgcc
-I../../gcc-4.6.2/libgcc/. -I../../gcc-4.6.2/libgcc/../gcc
-I../../gcc-4.6.2/libgcc/../include  -DHAVE_CC_TLS -DUSE_EMUTLS -o
unwind-dw2-fde.o -MT unwind-dw2-fde.o -MD -MP -MF unwind-dw2-fde.dep
-fexceptions -c ../../gcc-4.6.2/libgcc/../gcc/unwind-dw2-fde.c 
../../gcc-4.6.2/libgcc/../gcc/unwind-dw2-fde.c: In function 'frame_downheap':
c-4.6.2/libgcc/../gcc/unwind-dw2-fde.c:502:1: error: unrecognizable insn:
(insn 43 42 44 8 (set (mem/v:DI (plus:DI (reg/f:SI 1 1)
                (const_int 20 [0x14])) [0 S8 A8])
        (reg:SI 2 2)) ../../gcc-4.6.2/libgcc/../gcc/unwind-dw2-fde.c:491 -1
     (nil))
../../gcc-4.6.2/libgcc/../gcc/unwind-dw2-fde.c:502:1: internal compiler error:
in extract_insn, at recog.c:2109
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See <http://gcc.gnu.org/bugs.html> for instructions.