Hi! On Fri, Sep 17, 2021 at 11:27:09AM -0500, Bill Schmidt wrote: > On 9/15/21 3:52 AM, Kewen.Lin wrote: > >+-param=rs6000-density-pct-threshold= > >+Target Undocumented Joined UInteger Var(rs6000_density_pct_threshold) > >Init(85) IntegerRange(0, 99) Param > >+When costing for loop vectorization, we probably need to penalize the > >loop body cost if the existing cost model may not adequately reflect > >delays from unavailable vector resources. We collect the cost for > >vectorized statements and non-vectorized statements separately, check the > >proportion of vec_cost to total cost of vec_cost and non vec_cost, and > >penalize only if the proportion exceeds the threshold specified by this > >parameter. The default value is 85. > >+ > >+-param=rs6000-density-size-threshold= > >+Target Undocumented Joined UInteger Var(rs6000_density_size_threshold) > >Init(70) IntegerRange(0, 99) Param > > I think 99 is not a sufficient upper bound. This is a counting value > that could in theory get much higher. Can you set it to something > ridiculous like IntegerRange(0, 1000)?
It is a percentage. (0,100) is the maximum that makes any sense :-) It may be useful to make it a bit more sensitive than hundreds, but it is a heuristic anyway, this will work fine. But allowing 100 will be good. Segher
