[PATCH] Move statics to threader pass class.

[Jeff Law]

On 11/1/2021 3:53 AM, Aldy Hernandez wrote:
> This patch moves all the static functions into the pass class, and
> cleans up things a little.  The goal is to shuffle things around such
> that we can add debug counters that depend on different threading
> passes, but it's a clean-up on its own right.
>
> Tested on x86-64 Linux.
>
> OK?
>
> gcc/ChangeLog:
>
> 	* tree-ssa-threadbackward.c (BT_NONE): New.
> 	(BT_SPEED): New.
> 	(BT_RESOLVE): New.
> 	(back_threader::back_threader): Add flags.
> 	Move loop initialization here.
> 	(back_threader::~back_threader): New.
> 	(back_threader::find_taken_edge_switch): Change solver and ranger
> 	to pointers.
> 	(back_threader::find_taken_edge_cond): Same.
> 	(back_threader::find_paths_to_names): Same.
> 	(back_threader::find_paths): Same.
> 	(back_threader::dump): Same.
> 	(try_thread_blocks): Merge into thread_blocks.
> 	(back_threader::thread_blocks): New.
> 	(do_early_thread_jumps): Merge into thread_blocks.
> 	(do_thread_jumps): Merge into thread_blocks.
> 	(back_threader::thread_through_all_blocks): Remove.
OK.  Presumably this is a prereq for the counter patch.

jeff