[Bug rtl-optimization/32300] [4.3 Regression] ICE with -O2 -fsee

[jakub at gcc dot gnu dot org]

------- Comment #11 from jakub at gcc dot gnu dot org  2007-09-04 23:31 -------
Subject: Bug 32300

Author: jakub
Date: Tue Sep  4 23:31:11 2007
New Revision: 128108

URL: http://gcc.gnu.org/viewcvs?root=gcc&view=rev&rev=128108
Log:
        PR rtl-optimization/32300
        * see.c (see_copy_insn): New function.
        (see_def_extension_not_merged, see_merge_one_use_extension,
        see_merge_one_def_extension): Use it.  Avoid changing
        PREV_INSN/NEXT_INSN chains directly, insted emit insns
        into sequences.  Call df_insn_delete on temporary insns
        that won't be emitted into the insn stream.
        (rest_of_handle_see): Turn off DF_DEFER_INSN_RESCAN
        and run df_process_deferred_rescans () before run_fast_dce.

Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/see.c


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=32300