From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 1870 invoked by alias); 31 Oct 2011 07:52:52 -0000 Received: (qmail 1860 invoked by uid 22791); 31 Oct 2011 07:52:51 -0000 X-SWARE-Spam-Status: No, hits=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 X-Spam-Check-By: sourceware.org Received: from localhost (HELO gcc.gnu.org) (127.0.0.1) by sourceware.org (qpsmtpd/0.43rc1) with ESMTP; Mon, 31 Oct 2011 07:52:36 +0000 From: "jiangning.liu at arm dot com" To: gcc-bugs@gcc.gnu.org Subject: [Bug rtl-optimization/38644] [4.4/4.5/4.6/4.7 Regression] Optimization flag -O1 -fschedule-insns2 causes wrong code Date: Mon, 31 Oct 2011 07:52:00 -0000 X-Bugzilla-Reason: CC X-Bugzilla-Type: changed X-Bugzilla-Watch-Reason: None X-Bugzilla-Product: gcc X-Bugzilla-Component: rtl-optimization X-Bugzilla-Keywords: wrong-code X-Bugzilla-Severity: normal X-Bugzilla-Who: jiangning.liu at arm dot com X-Bugzilla-Status: NEW X-Bugzilla-Priority: P2 X-Bugzilla-Assigned-To: unassigned at gcc dot gnu.org X-Bugzilla-Target-Milestone: 4.4.7 X-Bugzilla-Changed-Fields: Message-ID: In-Reply-To: References: X-Bugzilla-URL: http://gcc.gnu.org/bugzilla/ Auto-Submitted: auto-generated Content-Type: text/plain; charset="UTF-8" MIME-Version: 1.0 Mailing-List: contact gcc-bugs-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-bugs-owner@gcc.gnu.org X-SW-Source: 2011-10/txt/msg03185.txt.bz2 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38644 --- Comment #56 from Jiangning Liu 2011-10-31 07:48:25 UTC --- (In reply to comment #54) > I tested with GCC 4.6.2 and the patch provided by Mikael Pettersson. It works > for -march=armv4t and -march=armv5t, but not for -march=armv5te: > Sebastian, Actually you may try this, diff --git a/gcc/config/arm/arm.c b/gcc/config/arm/arm.c index aed748c..8269c1a 100755 --- a/gcc/config/arm/arm.c +++ b/gcc/config/arm/arm.c @@ -22273,6 +22273,8 @@ thumb1_expand_epilogue (void) gcc_assert (amount >= 0); if (amount) { + emit_insn (gen_blockage ()); + if (amount < 512) emit_insn (gen_addsi3 (stack_pointer_rtx, stack_pointer_rtx, GEN_INT (amount))); Thanks, -Jiangning