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From: Michael Paquier <[email protected]>
To: Alexander Lakhin <[email protected]>
Cc: pgsql-hackers <[email protected]>
Cc: Greg Burd <[email protected]>
Subject: Re: pgcrypto/des tests fail on riscv64 due to clang's code generation anomaly
Date: Mon, 16 Mar 2026 10:08:22 +0900
Message-ID: <[email protected]> (raw)
In-Reply-To: <[email protected]>
References: <[email protected]>

On Sun, Mar 15, 2026 at 02:00:00PM +0200, Alexander Lakhin wrote:
> adding -march=rv64gcv to CFLAGS makes clang generate different (wrong?)
> code for crypt-des.c. Namely, having reproduced the diff locally, with
> this debugging addition:
> 
> when the code compiled with CC=clang-20 CPPFLAGS="-march=rv64gcv".

Thanks for the detailed investigation.  I was puzzled by it myself for
a couple of hours, and did not see something else than a broken
compiler here..
--
Michael


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