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From: "hjl at lucon dot org" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug rtl-optimization/17387] Redundant instructions in loop optimization
Date: Mon, 27 Feb 2006 23:55:00 -0000	[thread overview]
Message-ID: <20060227234043.18967.qmail@sourceware.org> (raw)
In-Reply-To: <bug-17387-682@http.gcc.gnu.org/bugzilla/>



------- Comment #19 from hjl at lucon dot org  2006-02-27 23:40 -------
Even with the new patch

http://gcc.gnu.org/ml/gcc-patches/2006-02/msg01994.html

I still got the same result. The new see pass won't touch

(insn:HI 13 9 14 2 (set (reg/v:SI 73 [ t ])
        (mem/s:SI (symbol_ref:DI ("state") [flags 0x40] <var_decl 0x2a98541420
state>) [3 state+0 S4 A32])) 40 {*movsi_1} (nil)
    (nil))

(insn:HI 14 13 16 2 (parallel [
            (set (reg/v:SI 73 [ t ])
                (xor:SI (mem/s:SI (symbol_ref:DI ("S") [flags 0x40] <var_decl
0x2a985412c0 S>) [3 S+0 S4 A32])
                    (reg/v:SI 73 [ t ])))
            (clobber (reg:CC 17 flags))
        ]) 340 {*xorsi_1} (insn_list:REG_DEP_TRUE 13 (nil))
    (expr_list:REG_UNUSED (reg:CC 17 flags)
        (expr_list:REG_EQUAL (xor:SI (mem/s:SI (symbol_ref:DI ("S") [flags
0x40] <var_decl 0x2a985412c0 S>) [3 S+0 S4 A32])
                (mem/s:SI (symbol_ref:DI ("state") [flags 0x40] <var_decl
0x2a98541420 state>) [3 state+0 S4 A32]))
            (nil))))

(insn:HI 16 14 18 2 (set (mem/s:SI (symbol_ref:DI ("state") [flags 0x40]
<var_decl 0x2a98541420 state>) [3 state+0 S4 A32])
        (reg/v:SI 73 [ t ])) 40 {*movsi_1} (insn_list:REG_DEP_TRUE 14 (nil))
    (nil))

(insn:HI 18 16 21 2 (set (reg:DI 79 [ t ])
        (zero_extend:DI (reg/v:SI 73 [ t ]))) 111 {zero_extendsidi2_rex64}
(nil)
    (expr_list:REG_DEAD (reg/v:SI 73 [ t ])
        (nil)))


-- 

hjl at lucon dot org changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Version|4.0.0                       |4.2.0


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17387


  parent reply	other threads:[~2006-02-27 23:40 UTC|newest]

Thread overview: 31+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-17387-682@http.gcc.gnu.org/bugzilla/>
2006-01-15 20:30 ` pinskia at gcc dot gnu dot org
2006-02-27 23:55 ` hjl at lucon dot org [this message]
2007-04-20 20:58 ` steven at gcc dot gnu dot org
2007-04-20 21:10 ` steven at gcc dot gnu dot org
2007-05-25 20:32 ` steven at gcc dot gnu dot org
2009-02-18 13:02 ` [Bug rtl-optimization/17387] Redundant zero extension " bonzini at gnu dot org
2009-02-18 21:24 ` hjl dot tools at gmail dot com
2009-02-18 21:32 ` hjl dot tools at gmail dot com
2009-09-17 13:48 ` hjl dot tools at gmail dot com
2010-05-22 20:48 ` hjl dot tools at gmail dot com
2004-09-09 23:54 [Bug c/17387] New: Redundant " hjl at lucon dot org
2004-09-10  0:36 ` [Bug rtl-optimization/17387] " pinskia at gcc dot gnu dot org
2004-09-10  2:50 ` law at gcc dot gnu dot org
2004-09-10  8:05 ` pinskia at gcc dot gnu dot org
2004-09-10  9:53 ` hubicka at gcc dot gnu dot org
2004-09-10 23:22 ` pinskia at gcc dot gnu dot org
2004-09-11 19:55 ` rakdver at gcc dot gnu dot org
2004-11-27 20:49 ` pinskia at gcc dot gnu dot org
2005-01-23 13:36 ` steven at gcc dot gnu dot org
2005-01-24 18:17 ` hjl at lucon dot org
2005-01-24 18:53 ` pinskia at gcc dot gnu dot org
2005-01-27  1:27 ` steven at gcc dot gnu dot org
2005-01-27  1:36 ` steven at gcc dot gnu dot org
2005-01-27  1:43 ` steven at gcc dot gnu dot org
2005-01-27  4:03 ` hjl at lucon dot org
2005-01-27  6:05 ` rth at gcc dot gnu dot org
2005-01-27  7:14 ` stevenb at suse dot de
2005-01-27 10:14 ` steven at gcc dot gnu dot org
2005-01-27 10:27 ` steven at gcc dot gnu dot org
2005-01-27 10:28 ` steven at gcc dot gnu dot org
2005-01-27 13:36 ` pinskia at gcc dot gnu dot org
2005-09-29  3:44 ` pinskia at gcc dot gnu dot org

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