[PATCH] vect: Init inside_cost in vect_model_reduction_cost

[Jeff Law]

On 3/25/2021 12:04 AM, Kewen.Lin via Gcc-patches wrote:
> Hi,
>
> I happened to find this possible use of uninitialized inside_cost during
> checking the cost for reduction.  Before r11-6587, all the if/else if/else
> arms will assign values to inside_cost, so it was fine.  But from r11-6587
> the else path won't assign any more, it leads the inside_cost possibly
> uninitialized for later use.  Note that it won't have any functionality
> issues, just could show one unreasonable cost in dump file.
>
> This is a trivial fix and I guess it can be counted as obvious, but
> I'm not sure if it's ok in stage 4.  So is it ok for trunk?
>
>
> BR,
> Kewen
> -----
> gcc/ChangeLog:
>
> 	* tree-vect-loop.c (vect_model_reduction_cost): Init inside_cost.

OK

jeff