Re: [PATCH] PR tree-optimization/102943 - Always use dominators in the cache when available.

[Richard Biener via Gcc-patches]

> Am 17.03.2022 um 18:35 schrieb Andrew MacLeod <amacl...@redhat.com>:
> 
> As discussed in the PR, this patch adjusts rangers cache query to *always* 
> use dominators to lookup ranges in the cache.
> 
> It use to give up if it encountered a block with outgoing edge ranges. This 
> patch changes that to continue looking back until a value is found, then 
> applies any outgoing ranges encountered along the way.
> 
> This prevents us from filling the on-entry cache in blocks which don't really 
> affect the outcome, and causes significant memory reduction is large 
> functions at a nominal calculation cost.
> 
> I have tweaked the debug output as well as a couple of other little things 
> from the original patch attached in the PR. Confirmed that the performance 
> results are similar, and generated reams of debug output to ensure there are 
> no issues there.
> 
> Bootstraps on x86_64-pc-linux-gnu with no regressions.  OK for trunk?

Ok.

Thanks,
Richard 

> 
> Andrew
> <943.patch>