From: Jeff Law <jeffreyalaw@gmail.com>
To: gcc-patches@gcc.gnu.org
Subject: Re: [PATCH] tree-optimization/106365 - DSE of LEN_STORE and MASK_STORE
Date: Sat, 30 Jul 2022 20:45:54 -0600 [thread overview]
Message-ID: <f18f84e9-4ed2-d780-1192-fd0f27d20610@gmail.com> (raw)
In-Reply-To: <20220721090553.6DCFD13A1B@imap2.suse-dmz.suse.de>
On 7/21/2022 3:05 AM, Richard Biener via Gcc-patches wrote:
> The following enhances DSE to handle LEN_STORE (optimally) and
> MASK_STORE (conservatively).
>
> Bootstrapped on x86_64-unknown-linux-gnu, testing in progress.
> Kewen is testing on powerpc. Handling MASK_STORE_LANES in
> a similar way to MASK_STORE is probably possible but I couldn't
> figure a way to generate one for testing. STORE_LANES is
> probably handled already since it's ECF_CONST.
>
> PR tree-optimization/106365
> * tree-ssa-dse.cc (initialize_ao_ref_for_dse): Handle
> LEN_STORE, add mode to initialize a may-def and handle
> MASK_STORE that way.
> (dse_optimize_stmt): Query may-defs. Handle internal
> functions LEN_STORE and MASK_STORE similar to how
> we handle memory builtins but without byte tracking.
LGTM. Obviously if you can massage the PR into a testcase, it's even
better :-)
jeff
prev parent reply other threads:[~2022-07-31 2:45 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-07-21 9:05 Richard Biener
2022-07-31 2:45 ` Jeff Law [this message]
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