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From: "hjl.tools at gmail dot com" <gcc-bugzilla@gcc.gnu.org> To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/50677] volatile forces load into register Date: Mon, 24 Feb 2014 16:03:00 -0000 [thread overview] Message-ID: <bug-50677-4-rOyHz9w1nC@http.gcc.gnu.org/bugzilla/> (raw) In-Reply-To: <bug-50677-4@http.gcc.gnu.org/bugzilla/> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=50677 --- Comment #4 from H.J. Lu <hjl.tools at gmail dot com> --- Combine generates Trying 6, 7 -> 8: Failed to match this instruction: (set (mem/v:SI (reg/v/f:DI 85 [ i ]) [2 *i_2(D)+0 S4 A32]) (plus:SI (mem/v:SI (reg/v/f:DI 85 [ i ]) [2 *i_2(D)+0 S4 A32]) (const_int 1 [0x1]))) from (insn 6 3 7 2 (set (reg:SI 83 [ D.1752 ]) (mem/v:SI (reg/v/f:DI 85 [ i ]) [2 *i_2(D)+0 S4 A32])) x.i:1 90 {*movsi_ internal} (nil)) (insn 7 6 8 2 (parallel [ (set (reg:SI 84 [ D.1752 ]) (plus:SI (reg:SI 83 [ D.1752 ]) (const_int 1 [0x1]))) (clobber (reg:CC 17 flags)) ]) x.i:1 266 {*addsi_1} (expr_list:REG_DEAD (reg:SI 83 [ D.1752 ]) (expr_list:REG_UNUSED (reg:CC 17 flags) (nil)))) Why doesn't combine include (clobber (reg:CC 17 flags))?
next prev parent reply other threads:[~2014-02-24 16:03 UTC|newest] Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top 2011-10-09 12:52 [Bug rtl-optimization/50677] New: " marc.glisse at normalesup dot org 2011-10-09 17:36 ` [Bug rtl-optimization/50677] " rguenth at gcc dot gnu.org 2011-10-09 19:49 ` pinskia at gcc dot gnu.org 2014-02-24 16:03 ` hjl.tools at gmail dot com [this message] 2014-02-24 16:17 ` pinskia at gcc dot gnu.org 2015-07-15 16:37 ` hjl.tools at gmail dot com 2015-07-15 17:07 ` hjl.tools at gmail dot com 2021-11-29 3:17 ` pinskia at gcc dot gnu.org 2022-09-27 23:37 ` pinskia at gcc dot gnu.org 2023-02-09 18:11 ` pinskia at gcc dot gnu.org
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