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From: "danglin at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/102162] Byte-wise access optimized away at -O1 and above Date: Wed, 01 Sep 2021 18:52:46 +0000 [thread overview] Message-ID: <bug-102162-4-eVhmFUcYUZ@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 #1 from John David Anglin <danglin at gcc dot gnu.org> --- Created attachment 51395 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51395&action=edit Second test case Changing the optimization of get_unaligned_le32 to 0 results in correct code generation. We have the following in test-unaligned.c.235t.optimized: ave@atlas:~/linux/misc$ cat test-unaligned.c.235t.optimized ;; Function get_unaligned_le32 (get_unaligned_le32, funcdef_no=0, decl_uid=1506, cgraph_uid=1, symbol_order=1) __attribute__((optimize (0))) get_unaligned_le32 (const void * p) { const struct { u32 x; } * __pptr; u32 D.1517; u32 _4; <bb 2> : __pptr_2 = p_1(D); _4 = __pptr_2->x; <bb 3> : <L0>: return _4; } ;; Function test (test, funcdef_no=1, decl_uid=1512, cgraph_uid=2, symbol_order=2) test () { unsigned int _1; int _4; <bb 2> [local count: 1073741824]: _1 = get_unaligned_le32 (&output_len); [tail call] _4 = (int) _1; return _4; }
next prev parent reply other threads:[~2021-09-01 18:52 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 ` danglin at gcc dot gnu.org [this message] 2021-09-01 20:14 ` [Bug tree-optimization/102162] " 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 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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