From owner-svn-src-head@FreeBSD.ORG Wed Oct 24 16:39:50 2012 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 30E90AB5; Wed, 24 Oct 2012 16:39:50 +0000 (UTC) (envelope-from dim@FreeBSD.org) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:4f8:fff6::2c]) by mx1.freebsd.org (Postfix) with ESMTP id F3C778FC0A; Wed, 24 Oct 2012 16:39:49 +0000 (UTC) Received: from svn.freebsd.org (localhost [127.0.0.1]) by svn.freebsd.org (8.14.4/8.14.4) with ESMTP id q9OGdnu7053423; Wed, 24 Oct 2012 16:39:49 GMT (envelope-from dim@svn.freebsd.org) Received: (from dim@localhost) by svn.freebsd.org (8.14.4/8.14.4/Submit) id q9OGdnSZ053419; Wed, 24 Oct 2012 16:39:49 GMT (envelope-from dim@svn.freebsd.org) Message-Id: <201210241639.q9OGdnSZ053419@svn.freebsd.org> From: Dimitry Andric Date: Wed, 24 Oct 2012 16:39:49 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r242007 - head/contrib/llvm/lib/Analysis X-SVN-Group: head MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: svn-src-head@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: SVN commit messages for the src tree for head/-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 24 Oct 2012 16:39:50 -0000 Author: dim Date: Wed Oct 24 16:39:49 2012 New Revision: 242007 URL: http://svn.freebsd.org/changeset/base/242007 Log: Pull in r165367 from upstream llvm trunk: Make sure always-inline functions get inlined. Without this change, when the estimated cost for inlining a function with an "alwaysinline" attribute was lower than the inlining threshold, the getInlineCost function was returning that estimated cost rather than the special InlineCost::AlwaysInlineCost value. That is fine in the normal inlining case, but it can fail when the inliner considers the opportunity cost of inlining into an internal or linkonce-odr function. It may decide not to inline the always-inline function in that case. The fix here is just to make getInlineCost always return the special value for always-inline functions. I ran into this building clang with libc++. Tablegen failed to link because of an always-inline function that was not inlined. I have been unable to reduce the testcase down to a reasonable size. This should fix the link errors that were reported when atf-run was compiled with clang -stdlib=libc++. In this case, at -O3 optimization, some calls to basic_ios::clear() were not inlined, even when the function was marked __always_inline__. Reported by: Jan Beich MFC after: 1 week Modified: head/contrib/llvm/lib/Analysis/InlineCost.cpp Modified: head/contrib/llvm/lib/Analysis/InlineCost.cpp ============================================================================== --- head/contrib/llvm/lib/Analysis/InlineCost.cpp Wed Oct 24 16:37:53 2012 (r242006) +++ head/contrib/llvm/lib/Analysis/InlineCost.cpp Wed Oct 24 16:39:49 2012 (r242007) @@ -138,6 +138,7 @@ public: int getThreshold() { return Threshold; } int getCost() { return Cost; } + bool isAlwaysInline() { return AlwaysInline; } // Keep a bunch of stats about the cost savings found so we can print them // out when debugging. @@ -1011,7 +1012,8 @@ InlineCost InlineCostAnalyzer::getInline // Check if there was a reason to force inlining or no inlining. if (!ShouldInline && CA.getCost() < CA.getThreshold()) return InlineCost::getNever(); - if (ShouldInline && CA.getCost() >= CA.getThreshold()) + if (ShouldInline && (CA.isAlwaysInline() || + CA.getCost() >= CA.getThreshold())) return InlineCost::getAlways(); return llvm::InlineCost::get(CA.getCost(), CA.getThreshold());