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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/102162] Byte-wise access optimized away at -O1 and above
Date: Wed, 01 Sep 2021 23:55:02 +0000 [thread overview]
Message-ID: <bug-102162-4-YvMDT3VPVW@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-102162-4@http.gcc.gnu.org/bugzilla/>
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=102162
--- Comment #20 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
tem was the var_decl
/* If TEM's type is a union of variable size, pass TARGET to the inner
computation, since it will need a temporary and TARGET is known
to have to do. This occurs in unchecked conversion in Ada. */
orig_op0 = op0
= expand_expr_real (tem,
(TREE_CODE (TREE_TYPE (tem)) == UNION_TYPE
&& COMPLETE_TYPE_P (TREE_TYPE (tem))
&& (TREE_CODE (TYPE_SIZE (TREE_TYPE (tem)))
!= INTEGER_CST)
&& modifier != EXPAND_STACK_PARM
? target : NULL_RTX),
VOIDmode,
modifier == EXPAND_SUM ? EXPAND_NORMAL :
modifier,
NULL, true);
produces:
(gdb) p debug_rtx(op0)
(mem/c:SI (reg/f:DI 71) [1 output_len+0 S4 A32])
Note the A32 here.
So it is a bug in the expansion of the var_decl.
next prev parent reply other threads:[~2021-09-01 23:55 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-09-01 16:52 [Bug tree-optimization/102162] New: " danglin at gcc dot gnu.org
2021-09-01 18:52 ` [Bug tree-optimization/102162] " danglin at gcc dot gnu.org
2021-09-01 20:14 ` arnd at linaro dot org
2021-09-01 20:52 ` deller at gmx dot de
2021-09-01 20:56 ` dave.anglin at bell dot net
2021-09-01 21:08 ` dave.anglin at bell dot net
2021-09-01 21:15 ` deller at gmx dot de
2021-09-01 21:19 ` dave.anglin at bell dot net
2021-09-01 21:25 ` deller at gmx dot de
2021-09-01 21:29 ` deller at gmx dot de
2021-09-01 21:48 ` pinskia at gcc dot gnu.org
2021-09-01 21:51 ` [Bug middle-end/102162] " pinskia at gcc dot gnu.org
2021-09-01 21:52 ` pinskia at gcc dot gnu.org
2021-09-01 22:35 ` dave.anglin at bell dot net
2021-09-01 22:46 ` dave.anglin at bell dot net
2021-09-01 22:56 ` pinskia at gcc dot gnu.org
2021-09-01 23:19 ` pinskia at gcc dot gnu.org
2021-09-01 23:21 ` pinskia at gcc dot gnu.org
2021-09-01 23:29 ` pinskia at gcc dot gnu.org
2021-09-01 23:45 ` pinskia at gcc dot gnu.org
2021-09-01 23:55 ` pinskia at gcc dot gnu.org [this message]
2021-09-02 0:02 ` dave.anglin at bell dot net
2021-09-02 0:19 ` pinskia at gcc dot gnu.org
2021-09-02 0:23 ` pinskia at gcc dot gnu.org
2021-09-02 0:47 ` dave.anglin at bell dot net
2021-09-02 0:49 ` pinskia at gcc dot gnu.org
2021-09-02 3:33 ` pinskia at gcc dot gnu.org
2021-09-02 7:12 ` rguenth at gcc dot gnu.org
2021-09-02 9:01 ` arnd at linaro dot org
2021-09-02 9:41 ` deller at gmx dot de
2021-09-02 9:52 ` pinskia at gcc dot gnu.org
2021-09-02 13:59 ` deller at gmx dot de
2021-09-02 14:00 ` deller at gmx dot de
2021-09-03 23:25 ` deller at gmx dot de
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