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From:   Andreas Schwab <schwab@linux-m68k.org>
To:     Jessica Clarke <jrtc27@jrtc27.com>
Cc:     Changbin Du <changbin.du@gmail.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        linux-riscv <linux-riscv@lists.infradead.org>,
        linux-kernel@vger.kernel.org
Subject: Re: [PATCH] riscv: eliminate unreliable __builtin_frame_address(1)
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Date:   Thu, 20 Jan 2022 00:53:07 +0100
In-Reply-To: <BD64D67C-613B-495E-9FB7-2AFB6FA15308@jrtc27.com> (Jessica
        Clarke's message of "Wed, 19 Jan 2022 21:27:46 +0000")
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On Jan 19 2022, Jessica Clarke wrote:

> What’s your point?

LLVM doesn't have to deal with the extra complexity.

> doesn’t mean other toolchains that do need that to be correct should
> just do something wrong.

__builtin_frame_address with count > 0 is considered bad.  Nobody should
use it.

You don't have to be arrogant.

-- 
Andreas Schwab, schwab@linux-m68k.org
GPG Key fingerprint = 7578 EB47 D4E5 4D69 2510  2552 DF73 E780 A9DA AEC1
"And now for something completely different."