From: Richard Henderson <richard.henderson@linaro.org>
To: "Alex Bennée" <alex.bennee@linaro.org>
Cc: qemu-devel@nongnu.org, pierrick.bouvier@linaro.org
Subject: Re: [PATCH 0/2] tcg: Fix branch/label link during plugin expansion
Date: Fri, 13 Sep 2024 09:27:21 -0700 [thread overview]
Message-ID: <69ebf16e-dd3d-4dfb-be81-5034e8fe781f@linaro.org> (raw)
In-Reply-To: <87jzffrgw0.fsf@draig.linaro.org>
On 9/13/24 03:23, Alex Bennée wrote:
>> Note that the branch is X < 0 (unsigned), which is always false, and
>> thus the branch is optimized away.
>
> I'm obviously missing something reading this. How can TCG know the state
> of the scoreboard variables and optimise away the branch?
0 < 0 is of course false.
r~
next prev parent reply other threads:[~2024-09-13 16:28 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-09-10 21:23 [PATCH 0/2] tcg: Fix branch/label link during plugin expansion Richard Henderson
2024-09-10 21:23 ` [PATCH 1/2] tcg: Return TCGOp from tcg_gen_op[1-6] Richard Henderson
2024-09-10 21:45 ` Pierrick Bouvier
2024-09-13 10:26 ` Alex Bennée
2024-09-13 20:50 ` Philippe Mathieu-Daudé
2024-09-10 21:23 ` [PATCH 2/2] tcg: Propagate new TCGOp to add_as_label_use Richard Henderson
2024-09-10 21:50 ` Pierrick Bouvier
2024-09-10 21:56 ` Richard Henderson
2024-09-10 21:28 ` [PATCH 0/2] tcg: Fix branch/label link during plugin expansion Richard Henderson
2024-09-13 10:23 ` Alex Bennée
2024-09-13 16:27 ` Richard Henderson [this message]
2024-09-18 18:43 ` Pierrick Bouvier
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