From: Jakub Jelinek <jakub@redhat.com>
To: Paul Edwards <mutazilah@gmail.com>
Cc: GCC Development <gcc@gcc.gnu.org>
Subject: Re: gcc 3.2.3 x64 negative indexes
Date: Wed, 7 Feb 2024 16:12:37 +0100 [thread overview]
Message-ID: <ZcOd5TkXnC1jeTs6@tucnak> (raw)
In-Reply-To: <CAMi4NxaOSAhwnNTkbOiC7nz_0GfF72e9uTszs6HNTAhwqh5MMA@mail.gmail.com>
On Wed, Feb 07, 2024 at 11:02:51PM +0800, Paul Edwards via Gcc wrote:
> I am using a slightly modified gcc 3.2.3 for x86_64 and for this code:
Don't, gcc 3.2.3 is not supported for more than 20 years already.
> int fff(char *x)
> {
> return (x[-1]);
> }
>
>
> It is generating:
>
> .globl fff
> fff:
> .LFB2:
> movl $4294967295, %eax
> movsbl (%rax,%rcx),%eax
That said, I can't reproduce it and get
movsbl -1(%rdi),%eax
ret
from 3.2.3.
Jakub
next prev parent reply other threads:[~2024-02-07 15:12 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-07 15:02 Paul Edwards
2024-02-07 15:12 ` Jakub Jelinek [this message]
2024-02-09 21:34 ` Paul Edwards
2024-02-09 21:38 ` Paul Edwards
2024-02-10 13:41 ` Paul Edwards
2024-02-10 17:42 ` Joe Monk
2024-02-10 19:48 ` Paul Edwards
2024-02-11 0:03 ` Paul Edwards
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