6699b754e1
* cse.c (is_dead_reg): Change into inline function that is not called through for_each_rtx. (set_live_p): Adjust caller. (insn_live_p): Don't reset DEBUG_INSNs here. (struct dead_debug_insn_data): New data. (count_stores, is_dead_debug_insn, replace_dead_reg): New functions. (delete_trivially_dead_insns): If there is just one setter for the dead reg that is referenced by some DEBUG_INSNs, create a DEBUG_EXPR and add DEBUG_INSN for it right before the removed setter and use the DEBUG_EXPR instead of the dead pseudo. From-SVN: r165452
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