re PR rtl-optimization/34035 (ICE in calc_dfs_tree with -O2 -fnon-call-exceptions -ffast-math -fno-gcse) PR rtl-optimization/34035 * cse.c (cse_cfg_altered): New global variable. (cse_jumps_altered): Make boolean. (recorded_label_ref): Likewise. (cse_insn): Adjust for above changes. (cse_extended_basic_block): Likewise. Set cse_cfg_altered if dead edges have been purged. (cse_main): Change return value specification and adjust code. (rest_of_handle_cse): Adjust for above change. (rest_of_handle_cse2): Likewise. * gcse.c (rest_of_handle_gcse): Likewise. From-SVN: r130122
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