From: Jeff Law <jeffreyalaw@gmail.com>
To: Andrew Pinski <apinski@marvell.com>, gcc-patches@gcc.gnu.org
Subject: Re: [PATCH 1/3] MATCH: Allow unsigned types for `X & -Y -> X * Y` pattern
Date: Wed, 7 Jun 2023 16:45:56 -0600 [thread overview]
Message-ID: <125dcdf0-02e5-e0e5-0841-a896532d4ced@gmail.com> (raw)
In-Reply-To: <20230607213217.3052696-1-apinski@marvell.com>
On 6/7/23 15:32, Andrew Pinski via Gcc-patches wrote:
> This allows unsigned types if the inner type where the negation is
> located has greater than or equal to precision than the outer type.
>
> branchless-cond.c needs to be updated since now we change it to
> use a multiply rather than still having (-a)&c in there.
>
> OK? Bootstrapped and tested on x86_64-linux-gnu.
>
> gcc/ChangeLog:
>
> * match.pd (`X & -Y -> X * Y`): Allow for truncation
> and the same type for unsigned types.
>
> gcc/testsuite/ChangeLog:
>
> * gcc.dg/tree-ssa/branchless-cond.c: Update testcase.
OK.
jeff
prev parent reply other threads:[~2023-06-07 22:45 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-07 21:32 Andrew Pinski
2023-06-07 21:32 ` [PATCH 2/3] Change the `zero_one ==/!= 0) ? y : z <op> y` patterns to use multiply rather than `(-zero_one) & z` Andrew Pinski
2023-06-07 22:56 ` Jeff Law
2023-06-07 23:05 ` Andrew Pinski
2023-06-07 23:11 ` Jeff Law
2023-06-07 23:19 ` Andrew Pinski
2023-06-07 21:32 ` [PATCH 3/3] Add Plus to the op list of `(zero_one == 0) ? y : z <op> y` pattern Andrew Pinski
2023-06-07 23:15 ` Jeff Law
2023-06-07 22:45 ` Jeff Law [this message]
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