+2008-12-18 Kenneth Zadeck <zadeck@naturalbridge.com>
+
+ PR rtl-optimization/37922
+ * dse.c (bb_info): Added regs_live field.
+ (look_for_hardregs): New function.
+ (replace_read): Added regs_live parameter and code to check that
+ shift sequence does not clobber live hardregs.
+ (check_mem_read_rtx): Added parameter to replace_read.
+ (dse_step1): Added regs_live bitmap and initialize it.
+ (rest_of_handle_dse): Added DF_NOTES problem and earlier call to
+ df_analyze.
+ * df-problems.c Renamed to
+ df_simulate_initialize_backwards.
+ (df_simulate_one_insn): Renamed to
+ df_simulate_one_insn_backwards.
+ (df_simulate_artificial_refs_at_top): Renamed to
+ df_simulate_finalize_backwards.
+ (df_simulate_initialized_forwards,
+ df_simulate_one_insn_forwards,
+ df_simulate_finalize_backwards): New functions.
+ * df.h (df_simulate_artificial_refs_at_end): Renamed to
+ df_simulate_initialize_backwards.
+ (df_simulate_one_insn): Renamed to
+ df_simulate_one_insn_backwards.
+ (df_simulate_artificial_refs_at_top): Renamed to
+ df_simulate_finalize_backwards.
+ (df_simulate_initialized_forwards,
+ df_simulate_one_insn_forwards,
+ df_simulate_finalize_backwards): New functions.
+ * ra-conflict.c (global_conflicts): Renamed
+ df_simulate_artificial_refs_at_end to
+ df_simulate_initialize_backwards.
+ * sel-sched.c (propagate_lv_set): Renamed df_simulate_one_insn to
+ df_simulate_one_insn_backwards.
+ * ifcvt.c (dead_or_predicable): Renamed
+ df_simulate_artificial_refs_at_end to
+ df_simulate_initialize_backwards. Renamed df_simulate_one_insn to
+ df_simulate_one_insn_backwards.
+ * recog.c (peephole2_optimize): Ditto.
+ * rtl-factoring (collect_pattern_seqs, clear_regs_live_in_seq): Ditto.
+
2008-12-18 Jakub Jelinek <jakub@redhat.com>
PR middle-end/38533
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