re PR tree-optimization/21399 (libstdc++ 12077.cc ICE)

re PR tree-optimization/21399 (libstdc++ 12077.cc ICE)

        PR tree-opt/21399
        * tree-eh.c (maybe_clean_or_replace_eh_stmt): Rename from
        maybe_clean_eh_stmt; take old stmt parameter.  Update EH
        region data structure to match replacement.
        * tree-flow.h: Update to match.
        * tree-ssa-ccp.c (execute_fold_all_builtins): Likewise.
        * tree-ssa-dom.c (optimize_stmt): Likewise.
        * tree-ssa-pre.c (eliminate): Likewise.
        * tree-ssa-propagate.c (substitute_and_fold): Likewise.

Co-Authored-By: Steven Bosscher <stevenb@suse.de>
From-SVN: r99801