Hi, In ifcvt.c's function find_if_case_2, it uses cheap_bb_rtx_cost_p to judge the conversion.
Function cheap_bb_rtx_cost_p checks whether the total insn_rtx_cost on non-jump insns in basic block BB is less than MAX_COST. So the question is why uses cheap_bb_rtx_cost_p, even when we know the ELSE is predicted, which means there is benefit from this conversion anyway. Second, should cheap_bb_rtx_cost_p be tuned as "checks whether the total insn_rtx_cost on non-jump insns in basic block BB is no larger than MAX_COST." to prefer normal instructions than branch even there have same costs. Any suggestions? Thanks in advance. -- Best Regards.
