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Hi,
Attached is a patch to speed up tree_ssa_dominator_optimize by removing a call to mark_dfs_back_edges.
Jeff removed all uses of EDGE_DFS_BACK in tree-ssa-dom.c, so we don't need to call mark_dfs_back_edges.
Tested on i686-pc-linux-gnu. OK to apply?
-- Mark Mitchell CodeSourcery, LLC mark@codesourcery.com (916) 791-8304
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