[Bug rtl-optimization/50326] [4.7 regression] ICE in set_lattice_value, at tree-ssa-ccp.c:456

["schwab@linux-m68k.org" <gcc-bugzilla@gcc.gnu.org>]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50326

Andreas Schwab <schwab@linux-m68k.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bernds at gcc dot gnu.org
          Component|tree-optimization           |rtl-optimization

--- Comment #1 from Andreas Schwab <schwab@linux-m68k.org> 2011-09-08 17:29:29 UTC ---
31adcf5623e6b926531c3a2973eb1b0c22d3c4c8 is the first bad commit
commit 31adcf5623e6b926531c3a2973eb1b0c22d3c4c8
Author: bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4>
Date:   Wed Sep 7 15:57:45 2011 +0000

        * regrename.c (struct du_head): Make nregs signed.
        (closed_chains): Remove.
        (create_new_chain): Return the new chain.
        (chain_from_id): New static function.
        (dump_def_use_chain): Change argument to be an int, indicating
        the first ID to print.  All callers changed.
        (merge_overlapping_regs): Use chain_from_id.  Assert that
        chains don't conflict with themselves.
        (rename_chains): Take no argument.  Iterate over id_to_chain
        rather to find chains to rename.  Clear tick before the main
        loop.
        (struct incoming_reg_info): New struct.
        (struct bb_rename_info): New struct.
        (init_rename_info, set_incoming_from_chain, merge_chains): New
        static functions.
        (regrename_analyze): New static function, broken out of
        regrename_optimize.  Record and make use of open chain information
        at basic block boundaries, and merge chains where possible.
        (scan_rtx_reg): Make this_nregs signed.  Don't update
        closed_chains.
        (build_def_use): Return a bool to indicate success.  All callers
        changed.  Don't initialize global data here.
        (regrename_optimize): Move most code out of here into
        regrename_analyze.
        * regs.h (add_range_to_hard_reg_set, remove_range_from_hard_reg_set,
        range_overlaps_hard_reg_set_p, range_in_hard_reg_set_p): New
        static inline functions.
        * vec.h (FOR_EACH_VEC_ELT_FROM): New macro.


    git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@178645
138bc75d-0d04-0410-961f-82ee72b054a4