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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/95021] [10/11 Regression] Bogus -Wclobbered warning
Date: Tue, 12 May 2020 13:34:50 +0000 [thread overview]
Message-ID: <bug-95021-4-W8KvhG63WX@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-95021-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=95021
--- Comment #5 from H.J. Lu <hjl.tools at gmail dot com> ---
STV generates:
8d b6 00 00 00 00 lea 0x0(%esi),%esi
a1 00 00 00 00 mov 0x0,%eax R_386_32 target_p
83 ec 08 sub $0x8,%esp
f3 0f 7e 00 movq (%eax),%xmm0
a1 00 00 00 00 mov 0x0,%eax R_386_32 c
66 0f 6f c8 movdqa %xmm0,%xmm1
66 0f 7e 44 24 10 movd %xmm0,0x10(%esp)
66 0f 73 d1 20 psrlq $0x20,%xmm1
66 0f d6 00 movq %xmm0,(%eax)
66 0f 7e 4c 24 14 movd %xmm1,0x14(%esp)
ff 74 24 14 pushl 0x14(%esp)
ff 74 24 14 pushl 0x14(%esp)
e8 fc ff ff ff call <d+0x53> R_386_PC32 e
instead of
8d b6 00 00 00 00 lea 0x0(%esi),%esi
a1 00 00 00 00 mov 0x0,%eax R_386_32 target_p
8b 0d 00 00 00 00 mov 0x0,%ecx R_386_32 c
83 ec 08 sub $0x8,%esp
8b 50 04 mov 0x4(%eax),%edx
8b 00 mov (%eax),%eax
89 51 04 mov %edx,0x4(%ecx)
89 01 mov %eax,(%ecx)
52 push %edx
50 push %eax
e8 fc ff ff ff call <d+0x3b> R_386_PC32 e
It is hard to tell if vector is faster.
next prev parent reply other threads:[~2020-05-12 13:34 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-09 16:14 [Bug middle-end/95021] New: " hjl.tools at gmail dot com
2020-05-09 19:19 ` [Bug middle-end/95021] " hjl.tools at gmail dot com
2020-05-11 1:26 ` hjl.tools at gmail dot com
2020-05-11 6:44 ` rguenth at gcc dot gnu.org
2020-05-12 13:08 ` hjl.tools at gmail dot com
2020-05-12 13:34 ` hjl.tools at gmail dot com [this message]
2020-05-12 13:50 ` rguenther at suse dot de
2020-05-12 20:08 ` hjl.tools at gmail dot com
2020-05-13 13:28 ` hjl.tools at gmail dot com
2020-05-17 17:13 ` cvs-commit at gcc dot gnu.org
2020-05-17 17:14 ` hjl.tools at gmail dot com
2020-05-18 19:01 ` ro at gcc dot gnu.org
2020-07-23 6:51 ` rguenth at gcc dot gnu.org
2021-01-14 8:43 ` [Bug middle-end/95021] [10 " rguenth at gcc dot gnu.org
2021-01-14 9:27 ` ro at CeBiTec dot Uni-Bielefeld.DE
2021-01-14 10:12 ` rguenth at gcc dot gnu.org
2021-01-14 11:56 ` ro at CeBiTec dot Uni-Bielefeld.DE
2021-01-14 12:19 ` rguenth at gcc dot gnu.org
2021-01-14 15:05 ` cvs-commit at gcc dot gnu.org
2021-01-14 15:46 ` hjl.tools at gmail dot com
2021-04-08 12:02 ` rguenth at gcc dot gnu.org
2022-06-28 10:40 ` jakub at gcc dot gnu.org
2023-07-07 8:50 ` rguenth at gcc dot gnu.org
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