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From: "rguenth at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug target/52080] Stores to bitfields introduce a store-data-race on adjacent data
Date: Wed, 01 Feb 2012 10:23:00 -0000 [thread overview]
Message-ID: <bug-52080-4-Xq8G9ylciX@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-52080-4@http.gcc.gnu.org/bugzilla/>
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=52080
Richard Guenther <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Target|ia64-*-linux |ia64-*-linux,
| |sparc64-*-linux
CC| |ebotcazou at gcc dot
| |gnu.org
--- Comment #1 from Richard Guenther <rguenth at gcc dot gnu.org> 2012-02-01 10:22:51 UTC ---
SPARC64 is also affected.
;; ptr_1(D)->full = 1;
(insn 6 5 7 (set (reg:DI 110)
(mem/j:DI (plus:DI (reg/v/f:DI 109 [ ptr ])
(const_int 8 [0x8])) [0+8 S8 A64])) t.c:10 -1
(nil))
(insn 7 6 8 (set (reg:DI 112)
(const_int 2147483648 [0x80000000])) t.c:10 -1
(nil))
(insn 8 7 9 (set (reg:DI 111)
(ior:DI (reg:DI 110)
(reg:DI 112))) t.c:10 -1
(nil))
(insn 9 8 0 (set (mem/j:DI (plus:DI (reg/v/f:DI 109 [ ptr ])
(const_int 8 [0x8])) [0+8 S8 A64])
(reg:DI 111)) t.c:10 -1
(nil))
wrong:
ldx [%o0+8], %g2
sethi %hi(2147483648), %g1
or %g2, %g1, %g1
jmp %o7+8
stx %g1, [%o0+8]
At least IA64 also can do 4-byte loads/stores (but not sure the HW
wouldn't re-introduce the data race).
next prev parent reply other threads:[~2012-02-01 10:23 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-01 10:07 [Bug target/52080] New: " rguenth at gcc dot gnu.org
2012-02-01 10:23 ` rguenth at gcc dot gnu.org [this message]
2012-02-01 10:25 ` [Bug target/52080] " rguenth at gcc dot gnu.org
2012-02-01 10:39 ` rguenth at gcc dot gnu.org
2012-02-01 11:13 ` rguenth at gcc dot gnu.org
2012-02-01 17:12 ` ebotcazou at gcc dot gnu.org
2012-02-01 17:45 ` ebotcazou at gcc dot gnu.org
2012-02-01 17:50 ` matz at gcc dot gnu.org
2012-02-01 18:53 ` bergner at gcc dot gnu.org
2012-02-02 11:01 ` gcc-bugs at tesarici dot cz
2012-02-02 11:11 ` rguenth at gcc dot gnu.org
2012-02-02 12:40 ` gcc-bugs at tesarici dot cz
2012-02-21 12:04 ` rguenth at gcc dot gnu.org
2012-03-14 11:00 ` rguenth at gcc dot gnu.org
2012-03-14 11:01 ` rguenth at gcc dot gnu.org
2012-06-04 8:44 ` rguenth at gcc dot gnu.org
2013-02-19 20:37 ` LpSolit at netscape dot net
2014-02-16 13:17 ` jackie.rosen at hushmail dot com
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