flow.c (struct propagate_block_info): Add mem_set_list_len.
* flow.c (struct propagate_block_info): Add mem_set_list_len. (MAX_MEM_SET_LIST_LEN): New. (propagate_one_insn): Update mem_set_list_len. (invalidate_mems_from_autoinc): Likewise. (invalidate_mems_from_set): Likewise. (mark_used_regs): Likewise. (init_propagate_block_info): Likewise. Stop collecting memories when we reach MAX_MEM_SET_LIST_LEN. (mark_set_1): Likewise. From-SVN: r39065
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