From owner-svn-src-head@FreeBSD.ORG Wed Apr 23 18:25:12 2014 Return-Path: Delivered-To: svn-src-head@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1 with cipher ADH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id EC4F4A72; Wed, 23 Apr 2014 18:25:12 +0000 (UTC) Received: from svn.freebsd.org (svn.freebsd.org [IPv6:2001:1900:2254:2068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id CD8501716; Wed, 23 Apr 2014 18:25:12 +0000 (UTC) Received: from svn.freebsd.org ([127.0.1.70]) by svn.freebsd.org (8.14.8/8.14.8) with ESMTP id s3NIPCD6074256; Wed, 23 Apr 2014 18:25:12 GMT (envelope-from emaste@svn.freebsd.org) Received: (from emaste@localhost) by svn.freebsd.org (8.14.8/8.14.8/Submit) id s3NIPCWY074250; Wed, 23 Apr 2014 18:25:12 GMT (envelope-from emaste@svn.freebsd.org) Message-Id: <201404231825.s3NIPCWY074250@svn.freebsd.org> From: Ed Maste Date: Wed, 23 Apr 2014 18:25:12 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-head@freebsd.org Subject: svn commit: r264826 - in head/contrib/llvm: include/llvm lib/CodeGen/AsmPrinter 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: 2.1.17 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, 23 Apr 2014 18:25:13 -0000 Author: emaste Date: Wed Apr 23 18:25:11 2014 New Revision: 264826 URL: http://svnweb.freebsd.org/changeset/base/264826 Log: Merge LLVM r202188: Debug info: Support variadic functions. Variadic functions have an unspecified parameter tag after the last argument. In IR this is represented as an unspecified parameter in the subroutine type. Paired commit with CFE r202185. rdar://problem/13690847 This re-applies r202184 + a bugfix in DwarfDebug's argument handling. This merge includes a change to use the LLVM 3.4 API in lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp: DwarfUnit -> CompileUnit Sponsored by: DARPA, AFRL Modified: head/contrib/llvm/include/llvm/DIBuilder.h head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp Modified: head/contrib/llvm/include/llvm/DIBuilder.h ============================================================================== --- head/contrib/llvm/include/llvm/DIBuilder.h Wed Apr 23 16:50:40 2014 (r264825) +++ head/contrib/llvm/include/llvm/DIBuilder.h Wed Apr 23 18:25:11 2014 (r264826) @@ -439,7 +439,7 @@ namespace llvm { /// through debug info anchors. void retainType(DIType T); - /// createUnspecifiedParameter - Create unspeicified type descriptor + /// createUnspecifiedParameter - Create unspecified type descriptor /// for a subroutine type. DIDescriptor createUnspecifiedParameter(); Modified: head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp ============================================================================== --- head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp Wed Apr 23 16:50:40 2014 (r264825) +++ head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.cpp Wed Apr 23 18:25:11 2014 (r264826) @@ -1116,6 +1116,22 @@ void CompileUnit::constructTypeDIE(DIE & addSourceLine(&Buffer, DTy); } +/// constructSubprogramArguments - Construct function argument DIEs. +void CompileUnit::constructSubprogramArguments(DIE &Buffer, DIArray Args) { + for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) { + DIDescriptor Ty = Args.getElement(i); + if (Ty.isUnspecifiedParameter()) { + assert(i == N-1 && "ellipsis must be the last argument"); + createAndAddDIE(dwarf::DW_TAG_unspecified_parameters, Buffer); + } else { + DIE *Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, Buffer); + addType(Arg, DIType(Ty)); + if (DIType(Ty).isArtificial()) + addFlag(Arg, dwarf::DW_AT_artificial); + } + } +} + /// Return true if the type is appropriately scoped to be contained inside /// its own type unit. static bool isTypeUnitScoped(DIType Ty, const DwarfDebug *DD) { @@ -1170,19 +1186,12 @@ void CompileUnit::constructTypeDIE(DIE & addType(&Buffer, RTy); bool isPrototyped = true; - // Add arguments. - for (unsigned i = 1, N = Elements.getNumElements(); i < N; ++i) { - DIDescriptor Ty = Elements.getElement(i); - if (Ty.isUnspecifiedParameter()) { - createAndAddDIE(dwarf::DW_TAG_unspecified_parameters, Buffer); - isPrototyped = false; - } else { - DIE *Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, Buffer); - addType(Arg, DIType(Ty)); - if (DIType(Ty).isArtificial()) - addFlag(Arg, dwarf::DW_AT_artificial); - } - } + if (Elements.getNumElements() == 2 && + Elements.getElement(1).isUnspecifiedParameter()) + isPrototyped = false; + + constructSubprogramArguments(Buffer, Elements); + // Add prototype flag if we're dealing with a C language and the // function has been prototyped. uint16_t Language = getLanguage(); @@ -1475,13 +1484,7 @@ DIE *CompileUnit::getOrCreateSubprogramD // Add arguments. Do not add arguments for subprogram definition. They will // be handled while processing variables. - for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) { - DIE *Arg = createAndAddDIE(dwarf::DW_TAG_formal_parameter, *SPDie); - DIType ATy(Args.getElement(i)); - addType(Arg, ATy); - if (ATy.isArtificial()) - addFlag(Arg, dwarf::DW_AT_artificial); - } + constructSubprogramArguments(*SPDie, Args); } if (SP.isArtificial()) Modified: head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h ============================================================================== --- head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h Wed Apr 23 16:50:40 2014 (r264825) +++ head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfCompileUnit.h Wed Apr 23 18:25:11 2014 (r264826) @@ -342,6 +342,9 @@ public: void emitHeader(const MCSection *ASection, const MCSymbol *ASectionSym); private: + /// constructSubprogramArguments - Construct function argument DIEs. + void constructSubprogramArguments(DIE &Buffer, DIArray Args); + /// constructTypeDIE - Construct basic type die from DIBasicType. void constructTypeDIE(DIE &Buffer, DIBasicType BTy); Modified: head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp ============================================================================== --- head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp Wed Apr 23 16:50:40 2014 (r264825) +++ head/contrib/llvm/lib/CodeGen/AsmPrinter/DwarfDebug.cpp Wed Apr 23 18:25:11 2014 (r264826) @@ -404,15 +404,21 @@ DIE *DwarfDebug::updateSubprogramScopeDI DIArray Args = SPTy.getTypeArray(); uint16_t SPTag = SPTy.getTag(); if (SPTag == dwarf::DW_TAG_subroutine_type) + // FIXME: Use DwarfUnit::constructSubprogramArguments() here. for (unsigned i = 1, N = Args.getNumElements(); i < N; ++i) { - DIE *Arg = - SPCU->createAndAddDIE(dwarf::DW_TAG_formal_parameter, *SPDie); DIType ATy(Args.getElement(i)); - SPCU->addType(Arg, ATy); - if (ATy.isArtificial()) - SPCU->addFlag(Arg, dwarf::DW_AT_artificial); - if (ATy.isObjectPointer()) - SPCU->addDIEEntry(SPDie, dwarf::DW_AT_object_pointer, Arg); + if (ATy.isUnspecifiedParameter()) { + assert(i == N-1 && "ellipsis must be the last argument"); + SPCU->createAndAddDIE(dwarf::DW_TAG_unspecified_parameters, *SPDie); + } else { + DIE *Arg = + SPCU->createAndAddDIE(dwarf::DW_TAG_formal_parameter, *SPDie); + SPCU->addType(Arg, ATy); + if (ATy.isArtificial()) + SPCU->addFlag(Arg, dwarf::DW_AT_artificial); + if (ATy.isObjectPointer()) + SPCU->addDIEEntry(SPDie, dwarf::DW_AT_object_pointer, Arg); + } } DIE *SPDeclDie = SPDie; SPDie = @@ -579,7 +585,7 @@ DIE *DwarfDebug::createScopeChildrenDIE( DIE *ObjectPointer = NULL; // Collect arguments for current function. - if (LScopes.isCurrentFunctionScope(Scope)) + if (LScopes.isCurrentFunctionScope(Scope)) { for (unsigned i = 0, N = CurrentFnArguments.size(); i < N; ++i) if (DbgVariable *ArgDV = CurrentFnArguments[i]) if (DIE *Arg = @@ -588,6 +594,16 @@ DIE *DwarfDebug::createScopeChildrenDIE( if (ArgDV->isObjectPointer()) ObjectPointer = Arg; } + // Create the unspecified parameter that marks a function as variadic. + DISubprogram SP(Scope->getScopeNode()); + assert(SP.Verify()); + DIArray FnArgs = SP.getType().getTypeArray(); + if (FnArgs.getElement(FnArgs.getNumElements()-1).isUnspecifiedParameter()) { + DIE *Ellipsis = new DIE(dwarf::DW_TAG_unspecified_parameters); + Children.push_back(Ellipsis); + } + } + // Collect lexical scope children first. const SmallVectorImpl &Variables =ScopeVariables.lookup(Scope); for (unsigned i = 0, N = Variables.size(); i < N; ++i)