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Subject: [Bug target/48344] powerpc ICE error: unrecognizable insn
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=48344

--- Comment #1 from Khem Raj <raj.khem at gmail dot com> 2011-04-01 20:43:26 UTC ---
I could track it down to commit 148869 on trunk 

Step 1 of VSX changes: Powerpc infrstructure changes

ChangeLog goes like this

2009-06-23  Michael Meissner  <meissner@linux.vnet.ibm.com>
        Pat Haugen  <pthaugen@us.ibm.com>
        Revital Eres  <eres@il.ibm.com>

    * config.in (HAVE_AS_POPCNTD): Add default definition.
    (HAVE_AS_LWSYNC): Ditto.

    * configure.ac (gcc_cv_as_powerpc_mfpgpr): Provide real binutils
    release number.
    (gcc_cv_as_powerpc_cmpb): Ditto.
    (gcc_cv_as_powerpc_dfp): Ditto.
    (gcc_cv_as_powerpc_vsx): Ditto.
    (gcc_cv_as_powerpc_popcntd): Add feature test for assembler
    supporting the popcntd/lwsync instructions.
    (gcc_cv_as_powerpc_lwsync): Ditto.
    * configure: Regenerate.

    * config/rs6000/aix53.h (ASM_CPU_SPEC): Add support for
    -mcpu=native and -mcpu=power7.
    * config/rs6000/aix61.h (ASM_CPU_SPEC): Ditto.

...