* tree-ssa-dce.c (DCE_TODOs): New.
(propagate_necessity): Return if something changed. (eliminate_unnecessary_stmts): Likewise. (perform_tree_ssa_dce): Return TODO flags when needed. (pass_dce, pass_dce_loop, pass_cd_dce): Remove TODO flags. git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@120797 138bc75d-0d04-0410-961f-82ee72b054a4
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