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From: "bernd.edlinger at hotmail dot de" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug middle-end/58041] Unaligned access to arrays in packed structure
Date: Tue, 06 Aug 2013 16:36:00 -0000 [thread overview]
Message-ID: <bug-58041-4-QSPBz8aFOw@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-58041-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58041
--- Comment #37 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
this version fixes the warning:
--- ../gcc-4.9-20130728/gcc/testsuite/gcc.dg/torture/pr58041.c 2013-08-02
20:59:38.000000000 +0200
+++ pr58041.c 2013-08-06 18:30:51.000000000 +0200
@@ -3,8 +3,6 @@
typedef long long V
__attribute__ ((vector_size (2 * sizeof (long long)), may_alias));
-typedef struct S { V v; } P __attribute__((aligned (1)));
-
struct s
{
char u;
@@ -12,24 +10,24 @@
} __attribute__((packed,aligned(1)));
__attribute__((noinline, noclone))
-long long foo(struct s *x, int y, V z)
+long long foo(struct s *x, int y, V *z)
{
V a = x->v[y];
- x->v[y] = z;
+ x->v[y] = *z;
return a[1];
}
-struct s a = {0,{0,0}};
+struct s a = {0,{{0,0},{0,0}}};
int main()
{
V v1 = {0,1};
V v2 = {0,2};
- if (foo(&a,0,v1) != 0)
+ if (foo(&a,0,&v1) != 0)
__builtin_abort();
- if (foo(&a,0,v2) != 1)
+ if (foo(&a,0,&v2) != 1)
__builtin_abort();
- if (foo(&a,1,v1) != 0)
+ if (foo(&a,1,&v1) != 0)
__builtin_abort();
return 0;
}
next prev parent reply other threads:[~2013-08-06 16:36 UTC|newest]
Thread overview: 41+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-01 7:26 [Bug middle-end/58041] New: " bernd.edlinger at hotmail dot de
2013-08-01 7:31 ` [Bug middle-end/58041] " bernd.edlinger at hotmail dot de
2013-08-01 9:09 ` mikpe at it dot uu.se
2013-08-01 11:36 ` mikpe at it dot uu.se
2013-08-01 11:51 ` mikpe at it dot uu.se
2013-08-01 13:26 ` wschmidt at gcc dot gnu.org
2013-08-01 16:18 ` wschmidt at gcc dot gnu.org
2013-08-01 16:23 ` jamborm at gcc dot gnu.org
2013-08-01 16:48 ` jamborm at gcc dot gnu.org
2013-08-01 17:27 ` jamborm at gcc dot gnu.org
2013-08-01 17:49 ` wschmidt at gcc dot gnu.org
2013-08-01 17:54 ` wschmidt at gcc dot gnu.org
2013-08-01 18:17 ` bernd.edlinger at hotmail dot de
2013-08-01 18:29 ` wschmidt at gcc dot gnu.org
2013-08-01 18:32 ` wschmidt at gcc dot gnu.org
2013-08-01 19:09 ` bernd.edlinger at hotmail dot de
2013-08-01 19:20 ` wschmidt at gcc dot gnu.org
2013-08-01 19:36 ` mikpe at it dot uu.se
2013-08-01 23:06 ` jamborm at gcc dot gnu.org
2013-08-02 15:22 ` wschmidt at gcc dot gnu.org
2013-08-02 15:28 ` wschmidt at gcc dot gnu.org
2013-08-02 15:54 ` ebotcazou at gcc dot gnu.org
2013-08-02 16:06 ` wschmidt at gcc dot gnu.org
2013-08-02 16:58 ` jamborm at gcc dot gnu.org
2013-08-02 17:12 ` wschmidt at gcc dot gnu.org
2013-08-02 18:07 ` wschmidt at gcc dot gnu.org
2013-08-03 8:31 ` bernd.edlinger at hotmail dot de
2013-08-05 17:43 ` jamborm at gcc dot gnu.org
2013-08-06 11:59 ` jamborm at gcc dot gnu.org
2013-08-06 14:24 ` bernd.edlinger at hotmail dot de
2013-08-06 15:18 ` jamborm at gcc dot gnu.org
2013-08-06 15:19 ` jamborm at gcc dot gnu.org
2013-08-06 15:33 ` bernd.edlinger at hotmail dot de
2013-08-06 15:56 ` bernd.edlinger at hotmail dot de
2013-08-06 16:06 ` jamborm at gcc dot gnu.org
2013-08-06 16:12 ` bernd.edlinger at hotmail dot de
2013-08-06 16:36 ` bernd.edlinger at hotmail dot de [this message]
2013-08-06 16:59 ` jamborm at gcc dot gnu.org
2013-08-06 17:07 ` bernd.edlinger at hotmail dot de
2013-08-06 17:37 ` jamborm at gcc dot gnu.org
2013-08-06 18:19 ` wschmidt at gcc dot gnu.org
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