Created attachment 25092 [details]
Reduced test case

The following occurs on powerpc64-linux in gcc-4_6-branch and ibm/gcc-4_6-branch, but not on trunk.  The options listed are the minimum required to exhibit the bug.  The reduced test case is attached.

> /home/wschmidt/gcc/install/gcc-4_6-branch/libexec/gcc/powerpc64-linux/4.6.2/cc1plus -mcpu=power7 -m32 -O3 -fprofile-generate -ffast-math -fpeel-loops ComputeNonbondedUtil-min-indent.ii 
 Index Molecule::atomvdwtype(int) const ExclusionCheck* Molecule::get_excl_check_for_atom(int) const const LJTable::TableEntry* LJTable::table_row(unsigned int) const static void ComputeNonbondedUtil::calc_pair_energy_fullelect(nonbonded*)
Analyzing compilation unit
Performing interprocedural optimizations
 <*free_lang_data> <visibility> <early_local_cleanups> <tree_profile_ipa> <increase_alignment> <whole-program> <ipa-profile> <cp> <inline> <pure-const> <static-var>Assembling functions:
 static void ComputeNonbondedUtil::calc_pair_energy_fullelect(nonbonded*)
ComputeNonbondedUtil-min-indent.ii: In static member function ‘static void ComputeNonbondedUtil::calc_pair_energy_fullelect(nonbonded*)’:
ComputeNonbondedUtil-min-indent.ii:421:1: error: insn does not satisfy its constraints:
(insn 2590 1849 1850 39 (set (mem/c:DI (plus:SI (reg/f:SI 1 1)
                (const_int 32760 [0x7ff8])) [14 %sfp+32760 S8 A64])
        (reg:DI 20 20)) ComputeNonbondedUtil-min-indent.ii:206 403 {*movdi_internal32}
     (nil))
ComputeNonbondedUtil-min-indent.ii:421:1: internal compiler error: in reload_cse_simplify_operands, at postreload.c:403
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