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From: "pinskia at gcc dot gnu dot org" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug tree-optimization/26534] [4.1/4.2 Regression] bitfield wrong optimize Date: Thu, 02 Mar 2006 21:35:00 -0000 [thread overview] Message-ID: <20060302213503.10168.qmail@sourceware.org> (raw) In-Reply-To: <bug-26534-10812@http.gcc.gnu.org/bugzilla/> ------- Comment #1 from pinskia at gcc dot gnu dot org 2006-03-02 21:35 ------- Confirmed, I don't know if this really a front-end issue or a tree opt issue as we get in cpp: x.a = 63; D.2483_3 = x.a; And then in FRE: x.a = 63; D.2483_3 = 63; But x.a is not a full integer (there should be an and somewhere). Note this does not have a problem in 4.0.x because FRE did not exist (well it did) and PRE did not do stuff based on loads. -- pinskia at gcc dot gnu dot org changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |pinskia at gcc dot gnu dot | |org Status|UNCONFIRMED |NEW Component|c++ |tree-optimization Ever Confirmed|0 |1 Keywords| |wrong-code Last reconfirmed|0000-00-00 00:00:00 |2006-03-02 21:35:03 date| | Summary|bitfield wrong optimize |[4.1/4.2 Regression] | |bitfield wrong optimize Target Milestone|--- |4.1.1 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26534
next prev parent reply other threads:[~2006-03-02 21:35 UTC|newest] Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top 2006-03-02 21:23 [Bug c++/26534] New: " s__nakayama at infoseek dot jp 2006-03-02 21:35 ` pinskia at gcc dot gnu dot org [this message] 2006-03-03 12:07 ` [Bug c++/26534] [4.1/4.2 Regression] " rguenth at gcc dot gnu dot org 2006-04-08 18:56 ` pinskia at gcc dot gnu dot org 2006-04-16 18:41 ` mmitchel at gcc dot gnu dot org 2006-04-18 15:27 ` bonzini at gnu dot org 2006-04-19 17:12 ` mmitchel at gcc dot gnu dot org 2006-04-22 22:14 ` mmitchel at gcc dot gnu dot org 2006-04-23 3:16 ` mmitchel at gcc dot gnu dot org 2006-04-23 18:04 ` mmitchel at gcc dot gnu dot org 2006-04-23 18:05 ` [Bug c++/26534] [4.1] " mmitchel at gcc dot gnu dot org 2006-05-01 2:18 ` mmitchel at gcc dot gnu dot org 2006-05-01 2:18 ` mmitchel at gcc dot gnu dot org
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