<div dir="ltr">I think it should be benign with/without this commit.</div><br><div class="gmail_quote"><div dir="ltr">On Tue, Oct 10, 2017 at 3:18 PM NAKAMURA Takumi <<a href="mailto:geek4civic@gmail.com">geek4civic@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">FYI, I tweaked the tree in rL315283. Shall we restore it?</div><br><div class="gmail_quote"><div dir="ltr">On Tue, Oct 10, 2017 at 9:41 PM Eric Liu via cfe-commits <<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr">Hi Richard, <div><br></div><div>This is breaking the boostrap stage in the internal integration. I'm seeing "<span style="white-space:pre-wrap">unsupported: typedef changes linkage of anonymous type, but linkage was already computed</span>" error for many `struct`s defined with typedef. I'm not sure if it is user code or clang that needs fixing; however, as there are likely many more struct definitions that would cause the same failure, I'll revert this commit as well as r315256, which depends on this. Sorry about that.<div><br></div><div>I'll also send you the repros separately. </div></div><div><br></div><div>Regards,</div><div>Eric</div></div><br><div class="gmail_quote"><div dir="ltr">On Tue, Oct 10, 2017 at 1:42 AM Richard Smith via cfe-commits <<a href="mailto:cfe-commits@lists.llvm.org" target="_blank">cfe-commits@lists.llvm.org</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Author: rsmith<br>
Date: Mon Oct 9 16:42:09 2017<br>
New Revision: 315251<br>
<br>
URL: <a href="http://llvm.org/viewvc/llvm-project?rev=315251&view=rev" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project?rev=315251&view=rev</a><br>
Log:<br>
[Modules TS] Module ownership semantics for redeclarations.<br>
<br>
When declaring an entity in the "purview" of a module, it's never a<br>
redeclaration of an entity in the purview of a default module or in no module<br>
("in the global module"). Don't consider those other declarations as possible<br>
redeclaration targets if they're not visible, and reject any cases where we<br>
pick a prior visible declaration that violates this rule.<br>
<br>
Added:<br>
cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/<br>
cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/global-vs-module.cpp<br>
cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-global.cpp<br>
cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-module.cpp<br>
Modified:<br>
cfe/trunk/include/clang/AST/Decl.h<br>
cfe/trunk/include/clang/AST/DeclBase.h<br>
cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td<br>
cfe/trunk/include/clang/Sema/Lookup.h<br>
cfe/trunk/include/clang/Sema/Sema.h<br>
cfe/trunk/lib/AST/Decl.cpp<br>
cfe/trunk/lib/AST/DeclBase.cpp<br>
cfe/trunk/lib/AST/DeclCXX.cpp<br>
cfe/trunk/lib/Sema/SemaDecl.cpp<br>
cfe/trunk/lib/Sema/SemaDeclCXX.cpp<br>
cfe/trunk/lib/Sema/SemaDeclObjC.cpp<br>
cfe/trunk/lib/Sema/SemaExprMember.cpp<br>
cfe/trunk/lib/Sema/SemaLookup.cpp<br>
cfe/trunk/lib/Sema/SemaOpenMP.cpp<br>
cfe/trunk/lib/Sema/SemaTemplate.cpp<br>
cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp<br>
cfe/trunk/test/SemaCXX/modules-ts.cppm<br>
<br>
Modified: cfe/trunk/include/clang/AST/Decl.h<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/Decl.h?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/Decl.h?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/include/clang/AST/Decl.h (original)<br>
+++ cfe/trunk/include/clang/AST/Decl.h Mon Oct 9 16:42:09 2017<br>
@@ -339,6 +339,12 @@ public:<br>
return clang::isExternallyVisible(getLinkageInternal());<br>
}<br>
<br>
+ /// Determine whether this declaration can be redeclared in a<br>
+ /// different translation unit.<br>
+ bool isExternallyDeclarable() const {<br>
+ return isExternallyVisible() && !getOwningModuleForLinkage();<br>
+ }<br>
+<br>
/// \brief Determines the visibility of this entity.<br>
Visibility getVisibility() const {<br>
return getLinkageAndVisibility().getVisibility();<br>
@@ -379,10 +385,6 @@ public:<br>
return hasCachedLinkage();<br>
}<br>
<br>
- /// Get the module that owns this declaration for linkage purposes.<br>
- /// There only ever is such a module under the C++ Modules TS.<br>
- Module *getOwningModuleForLinkage() const;<br>
-<br>
/// \brief Looks through UsingDecls and ObjCCompatibleAliasDecls for<br>
/// the underlying named decl.<br>
NamedDecl *getUnderlyingDecl() {<br>
<br>
Modified: cfe/trunk/include/clang/AST/DeclBase.h<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/DeclBase.h?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/AST/DeclBase.h?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/include/clang/AST/DeclBase.h (original)<br>
+++ cfe/trunk/include/clang/AST/DeclBase.h Mon Oct 9 16:42:09 2017<br>
@@ -738,6 +738,10 @@ public:<br>
return isFromASTFile() ? getImportedOwningModule() : getLocalOwningModule();<br>
}<br>
<br>
+ /// Get the module that owns this declaration for linkage purposes.<br>
+ /// There only ever is such a module under the C++ Modules TS.<br>
+ Module *getOwningModuleForLinkage() const;<br>
+<br>
/// \brief Determine whether this declaration might be hidden from name<br>
/// lookup. Note that the declaration might be visible even if this returns<br>
/// \c false, if the owning module is visible within the query context.<br>
<br>
Modified: cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td (original)<br>
+++ cfe/trunk/include/clang/Basic/DiagnosticSemaKinds.td Mon Oct 9 16:42:09 2017<br>
@@ -4801,6 +4801,9 @@ def err_thread_non_thread : Error<<br>
def err_thread_thread_different_kind : Error<<br>
"thread-local declaration of %0 with %select{static|dynamic}1 initialization "<br>
"follows declaration with %select{dynamic|static}1 initialization">;<br>
+def err_mismatched_owning_module : Error<<br>
+ "declaration of %0 in %select{the global module|module %2}1 follows "<br>
+ "declaration in %select{the global module|module %4}3">;<br>
def err_redefinition_different_type : Error<<br>
"redefinition of %0 with a different type%diff{: $ vs $|}1,2">;<br>
def err_redefinition_different_kind : Error<<br>
<br>
Modified: cfe/trunk/include/clang/Sema/Lookup.h<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Sema/Lookup.h?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Sema/Lookup.h?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/include/clang/Sema/Lookup.h (original)<br>
+++ cfe/trunk/include/clang/Sema/Lookup.h Mon Oct 9 16:42:09 2017<br>
@@ -139,6 +139,7 @@ public:<br>
LookupKind(LookupKind),<br>
IDNS(0),<br>
Redecl(Redecl != Sema::NotForRedeclaration),<br>
+ ExternalRedecl(Redecl == Sema::ForExternalRedeclaration),<br>
HideTags(true),<br>
Diagnose(Redecl == Sema::NotForRedeclaration),<br>
AllowHidden(false),<br>
@@ -161,6 +162,7 @@ public:<br>
LookupKind(LookupKind),<br>
IDNS(0),<br>
Redecl(Redecl != Sema::NotForRedeclaration),<br>
+ ExternalRedecl(Redecl == Sema::ForExternalRedeclaration),<br>
HideTags(true),<br>
Diagnose(Redecl == Sema::NotForRedeclaration),<br>
AllowHidden(false),<br>
@@ -181,6 +183,7 @@ public:<br>
LookupKind(Other.LookupKind),<br>
IDNS(Other.IDNS),<br>
Redecl(Other.Redecl),<br>
+ ExternalRedecl(Other.ExternalRedecl),<br>
HideTags(Other.HideTags),<br>
Diagnose(false),<br>
AllowHidden(Other.AllowHidden),<br>
@@ -201,7 +204,9 @@ public:<br>
SemaPtr(std::move(Other.SemaPtr)), NameInfo(std::move(Other.NameInfo)),<br>
NameContextRange(std::move(Other.NameContextRange)),<br>
LookupKind(std::move(Other.LookupKind)), IDNS(std::move(Other.IDNS)),<br>
- Redecl(std::move(Other.Redecl)), HideTags(std::move(Other.HideTags)),<br>
+ Redecl(std::move(Other.Redecl)),<br>
+ ExternalRedecl(std::move(Other.ExternalRedecl)),<br>
+ HideTags(std::move(Other.HideTags)),<br>
Diagnose(std::move(Other.Diagnose)),<br>
AllowHidden(std::move(Other.AllowHidden)),<br>
Shadowed(std::move(Other.Shadowed)) {<br>
@@ -221,6 +226,7 @@ public:<br>
LookupKind = std::move(Other.LookupKind);<br>
IDNS = std::move(Other.IDNS);<br>
Redecl = std::move(Other.Redecl);<br>
+ ExternalRedecl = std::move(Other.ExternalRedecl);<br>
HideTags = std::move(Other.HideTags);<br>
Diagnose = std::move(Other.Diagnose);<br>
AllowHidden = std::move(Other.AllowHidden);<br>
@@ -265,6 +271,17 @@ public:<br>
return Redecl;<br>
}<br>
<br>
+ /// True if this lookup is just looking for an existing declaration to link<br>
+ /// against a declaration with external linkage.<br>
+ bool isForExternalRedeclaration() const {<br>
+ return ExternalRedecl;<br>
+ }<br>
+<br>
+ Sema::RedeclarationKind redeclarationKind() const {<br>
+ return ExternalRedecl ? Sema::ForExternalRedeclaration :<br>
+ Redecl ? Sema::ForVisibleRedeclaration : Sema::NotForRedeclaration;<br>
+ }<br>
+<br>
/// \brief Specify whether hidden declarations are visible, e.g.,<br>
/// for recovery reasons.<br>
void setAllowHidden(bool AH) {<br>
@@ -275,7 +292,7 @@ public:<br>
/// declarations, such as those in modules that have not yet been imported.<br>
bool isHiddenDeclarationVisible(NamedDecl *ND) const {<br>
return AllowHidden ||<br>
- (isForRedeclaration() && ND->hasExternalFormalLinkage());<br>
+ (isForExternalRedeclaration() && ND->isExternallyDeclarable());<br>
}<br>
<br>
/// Sets whether tag declarations should be hidden by non-tag<br>
@@ -556,7 +573,8 @@ public:<br>
<br>
/// \brief Change this lookup's redeclaration kind.<br>
void setRedeclarationKind(Sema::RedeclarationKind RK) {<br>
- Redecl = RK;<br>
+ Redecl = (RK != Sema::NotForRedeclaration);<br>
+ ExternalRedecl = (RK == Sema::ForExternalRedeclaration);<br>
configure();<br>
}<br>
<br>
@@ -719,6 +737,7 @@ private:<br>
unsigned IDNS; // set by configure()<br>
<br>
bool Redecl;<br>
+ bool ExternalRedecl;<br>
<br>
/// \brief True if tag declarations should be hidden if non-tags<br>
/// are present<br>
<br>
Modified: cfe/trunk/include/clang/Sema/Sema.h<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Sema/Sema.h?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Sema/Sema.h?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/include/clang/Sema/Sema.h (original)<br>
+++ cfe/trunk/include/clang/Sema/Sema.h Mon Oct 9 16:42:09 2017<br>
@@ -285,15 +285,21 @@ class Sema {<br>
<br>
bool isVisibleSlow(const NamedDecl *D);<br>
<br>
+ /// Determine whether two declarations should be linked together, given that<br>
+ /// the old declaration might not be visible and the new declaration might<br>
+ /// not have external linkage.<br>
bool shouldLinkPossiblyHiddenDecl(const NamedDecl *Old,<br>
const NamedDecl *New) {<br>
- // We are about to link these. It is now safe to compute the linkage of<br>
- // the new decl. If the new decl has external linkage, we will<br>
- // link it with the hidden decl (which also has external linkage) and<br>
- // it will keep having external linkage. If it has internal linkage, we<br>
- // will not link it. Since it has no previous decls, it will remain<br>
- // with internal linkage.<br>
- return isVisible(Old) || New->isExternallyVisible();<br>
+ if (isVisible(Old))<br>
+ return true;<br>
+ // See comment in below overload for why it's safe to compute the linkage<br>
+ // of the new declaration here.<br>
+ if (New->isExternallyDeclarable()) {<br>
+ assert(Old->isExternallyDeclarable() &&<br>
+ "should not have found a non-externally-declarable previous decl");<br>
+ return true;<br>
+ }<br>
+ return false;<br>
}<br>
bool shouldLinkPossiblyHiddenDecl(LookupResult &Old, const NamedDecl *New);<br>
<br>
@@ -3035,10 +3041,22 @@ public:<br>
/// purpose of redeclaring the name.<br>
NotForRedeclaration = 0,<br>
/// \brief The lookup results will be used for redeclaration of a name,<br>
- /// if an entity by that name already exists.<br>
- ForRedeclaration<br>
+ /// if an entity by that name already exists and is visible.<br>
+ ForVisibleRedeclaration,<br>
+ /// \brief The lookup results will be used for redeclaration of a name<br>
+ /// with external linkage; non-visible lookup results with external linkage<br>
+ /// may also be found.<br>
+ ForExternalRedeclaration<br>
};<br>
<br>
+ RedeclarationKind forRedeclarationInCurContext() {<br>
+ // A declaration with an owning module for linkage can never link against<br>
+ // anything that is not visible.<br>
+ if (cast<Decl>(CurContext)->getOwningModuleForLinkage())<br>
+ return ForVisibleRedeclaration;<br>
+ return ForExternalRedeclaration;<br>
+ }<br>
+<br>
/// \brief The possible outcomes of name lookup for a literal operator.<br>
enum LiteralOperatorLookupResult {<br>
/// \brief The lookup resulted in an error.<br>
@@ -3266,6 +3284,8 @@ public:<br>
void FilterLookupForScope(LookupResult &R, DeclContext *Ctx, Scope *S,<br>
bool ConsiderLinkage, bool AllowInlineNamespace);<br>
<br>
+ bool CheckRedeclarationModuleOwnership(NamedDecl *New, NamedDecl *Old);<br>
+<br>
void DiagnoseAmbiguousLookup(LookupResult &Result);<br>
//@}<br>
<br>
<br>
Modified: cfe/trunk/lib/AST/Decl.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/Decl.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/Decl.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/AST/Decl.cpp (original)<br>
+++ cfe/trunk/lib/AST/Decl.cpp Mon Oct 9 16:42:09 2017<br>
@@ -515,6 +515,7 @@ static bool isSingleLineLanguageLinkage(<br>
}<br>
<br>
static bool isExportedFromModuleIntefaceUnit(const NamedDecl *D) {<br>
+ // FIXME: Handle isModulePrivate.<br>
switch (D->getModuleOwnershipKind()) {<br>
case Decl::ModuleOwnershipKind::Unowned:<br>
case Decl::ModuleOwnershipKind::ModulePrivate:<br>
@@ -546,7 +547,8 @@ static LinkageInfo getExternalLinkageFor<br>
// declaration has module linkage.<br>
if (auto *M = D->getOwningModule())<br>
if (M->Kind == Module::ModuleInterfaceUnit)<br>
- if (!isExportedFromModuleIntefaceUnit(D))<br>
+ if (!isExportedFromModuleIntefaceUnit(<br>
+ cast<NamedDecl>(D->getCanonicalDecl())))<br>
return LinkageInfo(ModuleLinkage, DefaultVisibility, false);<br>
<br>
return LinkageInfo::external();<br>
@@ -1393,7 +1395,7 @@ LinkageInfo LinkageComputer::getDeclLink<br>
: NamedDecl::VisibilityForValue));<br>
}<br>
<br>
-Module *NamedDecl::getOwningModuleForLinkage() const {<br>
+Module *Decl::getOwningModuleForLinkage() const {<br>
Module *M = getOwningModule();<br>
if (!M)<br>
return nullptr;<br>
@@ -1411,7 +1413,15 @@ Module *NamedDecl::getOwningModuleForLin<br>
// for linkage purposes. But internal linkage declarations in the global<br>
// module fragment of a particular module are owned by that module for<br>
// linkage purposes.<br>
- return hasExternalFormalLinkage() ? nullptr : M->Parent;<br>
+ bool InternalLinkage;<br>
+ if (auto *ND = dyn_cast<NamedDecl>(this))<br>
+ InternalLinkage = !ND->hasExternalFormalLinkage();<br>
+ else {<br>
+ auto *NSD = dyn_cast<NamespaceDecl>(this);<br>
+ InternalLinkage = (NSD && NSD->isAnonymousNamespace()) ||<br>
+ isInAnonymousNamespace();<br>
+ }<br>
+ return InternalLinkage ? M->Parent : nullptr;<br>
}<br>
<br>
llvm_unreachable("unknown module kind");<br>
<br>
Modified: cfe/trunk/lib/AST/DeclBase.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/DeclBase.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/DeclBase.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/AST/DeclBase.cpp (original)<br>
+++ cfe/trunk/lib/AST/DeclBase.cpp Mon Oct 9 16:42:09 2017<br>
@@ -315,12 +315,11 @@ bool Decl::isLexicallyWithinFunctionOrMe<br>
}<br>
<br>
bool Decl::isInAnonymousNamespace() const {<br>
- const DeclContext *DC = getDeclContext();<br>
- do {<br>
+ for (const DeclContext *DC = getDeclContext(); DC; DC = DC->getParent()) {<br>
if (const NamespaceDecl *ND = dyn_cast<NamespaceDecl>(DC))<br>
if (ND->isAnonymousNamespace())<br>
return true;<br>
- } while ((DC = DC->getParent()));<br>
+ }<br>
<br>
return false;<br>
}<br>
<br>
Modified: cfe/trunk/lib/AST/DeclCXX.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/DeclCXX.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/AST/DeclCXX.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/AST/DeclCXX.cpp (original)<br>
+++ cfe/trunk/lib/AST/DeclCXX.cpp Mon Oct 9 16:42:09 2017<br>
@@ -100,7 +100,7 @@ CXXRecordDecl::CXXRecordDecl(Kind K, Tag<br>
CXXRecordDecl *CXXRecordDecl::Create(const ASTContext &C, TagKind TK,<br>
DeclContext *DC, SourceLocation StartLoc,<br>
SourceLocation IdLoc, IdentifierInfo *Id,<br>
- CXXRecordDecl* PrevDecl,<br>
+ CXXRecordDecl *PrevDecl,<br>
bool DelayTypeCreation) {<br>
CXXRecordDecl *R = new (C, DC) CXXRecordDecl(CXXRecord, TK, C, DC, StartLoc,<br>
IdLoc, Id, PrevDecl);<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaDecl.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDecl.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaDecl.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaDecl.cpp Mon Oct 9 16:42:09 2017<br>
@@ -1448,6 +1448,46 @@ void Sema::FilterLookupForScope(LookupRe<br>
F.done();<br>
}<br>
<br>
+/// We've determined that \p New is a redeclaration of \p Old. Check that they<br>
+/// have compatible owning modules.<br>
+bool Sema::CheckRedeclarationModuleOwnership(NamedDecl *New, NamedDecl *Old) {<br>
+ // FIXME: The Modules TS is not clear about how friend declarations are<br>
+ // to be treated. It's not meaningful to have different owning modules for<br>
+ // linkage in redeclarations of the same entity, so for now allow the<br>
+ // redeclaration and change the owning modules to match.<br>
+ if (New->getFriendObjectKind() &&<br>
+ Old->getOwningModuleForLinkage() != New->getOwningModuleForLinkage()) {<br>
+ New->setLocalOwningModule(Old->getOwningModule());<br>
+ makeMergedDefinitionVisible(New);<br>
+ return false;<br>
+ }<br>
+<br>
+ Module *NewM = New->getOwningModule();<br>
+ Module *OldM = Old->getOwningModule();<br>
+ if (NewM == OldM)<br>
+ return false;<br>
+<br>
+ // FIXME: Check proclaimed-ownership-declarations here too.<br>
+ bool NewIsModuleInterface = NewM && NewM->Kind == Module::ModuleInterfaceUnit;<br>
+ bool OldIsModuleInterface = OldM && OldM->Kind == Module::ModuleInterfaceUnit;<br>
+ if (NewIsModuleInterface || OldIsModuleInterface) {<br>
+ // C++ Modules TS [basic.def.odr] 6.2/6.7 [sic]:<br>
+ // if a declaration of D [...] appears in the purview of a module, all<br>
+ // other such declarations shall appear in the purview of the same module<br>
+ Diag(New->getLocation(), diag::err_mismatched_owning_module)<br>
+ << New<br>
+ << NewIsModuleInterface<br>
+ << (NewIsModuleInterface ? NewM->getFullModuleName() : "")<br>
+ << OldIsModuleInterface<br>
+ << (OldIsModuleInterface ? OldM->getFullModuleName() : "");<br>
+ Diag(Old->getLocation(), diag::note_previous_declaration);<br>
+ New->setInvalidDecl();<br>
+ return true;<br>
+ }<br>
+<br>
+ return false;<br>
+}<br>
+<br>
static bool isUsingDecl(NamedDecl *D) {<br>
return isa<UsingShadowDecl>(D) ||<br>
isa<UnresolvedUsingTypenameDecl>(D) ||<br>
@@ -2962,6 +3002,9 @@ bool Sema::MergeFunctionDecl(FunctionDec<br>
New->dropAttr<InternalLinkageAttr>();<br>
}<br>
<br>
+ if (CheckRedeclarationModuleOwnership(New, Old))<br>
+ return true;<br>
+<br>
if (!getLangOpts().CPlusPlus) {<br>
bool OldOvl = Old->hasAttr<OverloadableAttr>();<br>
if (OldOvl != New->hasAttr<OverloadableAttr>() && !Old->isImplicit()) {<br>
@@ -3831,6 +3874,9 @@ void Sema::MergeVarDecl(VarDecl *New, Lo<br>
return New->setInvalidDecl();<br>
}<br>
<br>
+ if (CheckRedeclarationModuleOwnership(New, Old))<br>
+ return;<br>
+<br>
// Variables with external linkage are analyzed in FinalizeDeclaratorGroup.<br>
<br>
// FIXME: The test for external storage here seems wrong? We still<br>
@@ -4382,7 +4428,7 @@ static bool CheckAnonMemberRedeclaration<br>
SourceLocation NameLoc,<br>
bool IsUnion) {<br>
LookupResult R(SemaRef, Name, NameLoc, Sema::LookupMemberName,<br>
- Sema::ForRedeclaration);<br>
+ Sema::ForVisibleRedeclaration);<br>
if (!SemaRef.LookupName(R, S)) return false;<br>
<br>
// Pick a representative declaration.<br>
@@ -5321,7 +5367,7 @@ NamedDecl *Sema::HandleDeclarator(Scope<br>
D.setInvalidType();<br>
<br>
LookupResult Previous(*this, NameInfo, LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ forRedeclarationInCurContext());<br>
<br>
// See if this is a redefinition of a variable in the same scope.<br>
if (!D.getCXXScopeSpec().isSet()) {<br>
@@ -5347,8 +5393,10 @@ NamedDecl *Sema::HandleDeclarator(Scope<br>
D.getDeclSpec().getStorageClassSpec() != DeclSpec::SCS_static)<br>
CreateBuiltins = true;<br>
<br>
- if (IsLinkageLookup)<br>
+ if (IsLinkageLookup) {<br>
Previous.clear(LookupRedeclarationWithLinkage);<br>
+ Previous.setRedeclarationKind(ForExternalRedeclaration);<br>
+ }<br>
<br>
LookupName(Previous, S, CreateBuiltins);<br>
} else { // Something like "int foo::x;"<br>
@@ -7096,7 +7144,7 @@ void Sema::CheckShadow(Scope *S, VarDecl<br>
return;<br>
<br>
LookupResult R(*this, D->getDeclName(), D->getLocation(),<br>
- Sema::LookupOrdinaryName, Sema::ForRedeclaration);<br>
+ Sema::LookupOrdinaryName, Sema::ForVisibleRedeclaration);<br>
LookupName(R, S);<br>
if (NamedDecl *ShadowedDecl = getShadowedDeclaration(D, R))<br>
CheckShadow(D, ShadowedDecl, R);<br>
@@ -7672,7 +7720,7 @@ static NamedDecl *DiagnoseInvalidRedecla<br>
LookupResult Prev(SemaRef, Name, NewFD->getLocation(),<br>
IsLocalFriend ? Sema::LookupLocalFriendName<br>
: Sema::LookupOrdinaryName,<br>
- Sema::ForRedeclaration);<br>
+ Sema::ForVisibleRedeclaration);<br>
<br>
NewFD->setInvalidDecl();<br>
if (IsLocalFriend)<br>
@@ -11708,7 +11756,7 @@ Decl *Sema::ActOnParamDeclarator(Scope *<br>
// Check for redeclaration of parameters, e.g. int foo(int x, int x);<br>
if (II) {<br>
LookupResult R(*this, II, D.getIdentifierLoc(), LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ ForVisibleRedeclaration);<br>
LookupName(R, S);<br>
if (R.isSingleResult()) {<br>
NamedDecl *PrevDecl = R.getFoundDecl();<br>
@@ -13268,7 +13316,7 @@ Decl *Sema::ActOnTag(Scope *S, unsigned<br>
bool isStdBadAlloc = false;<br>
bool isStdAlignValT = false;<br>
<br>
- RedeclarationKind Redecl = ForRedeclaration;<br>
+ RedeclarationKind Redecl = forRedeclarationInCurContext();<br>
if (TUK == TUK_Friend || TUK == TUK_Reference)<br>
Redecl = NotForRedeclaration;<br>
<br>
@@ -13546,10 +13594,10 @@ Decl *Sema::ActOnTag(Scope *S, unsigned<br>
// type declared by an elaborated-type-specifier. In C that is not correct<br>
// and we should instead merge compatible types found by lookup.<br>
if (getLangOpts().CPlusPlus) {<br>
- Previous.setRedeclarationKind(ForRedeclaration);<br>
+ Previous.setRedeclarationKind(forRedeclarationInCurContext());<br>
LookupQualifiedName(Previous, SearchDC);<br>
} else {<br>
- Previous.setRedeclarationKind(ForRedeclaration);<br>
+ Previous.setRedeclarationKind(forRedeclarationInCurContext());<br>
LookupName(Previous, S);<br>
}<br>
}<br>
@@ -14047,6 +14095,9 @@ CreateNewDecl:<br>
if (!Invalid && SearchDC->isRecord())<br>
SetMemberAccessSpecifier(New, PrevDecl, AS);<br>
<br>
+ if (PrevDecl)<br>
+ CheckRedeclarationModuleOwnership(New, PrevDecl);<br>
+<br>
if (TUK == TUK_Definition)<br>
New->startDefinition();<br>
<br>
@@ -14400,7 +14451,8 @@ FieldDecl *Sema::HandleField(Scope *S, R<br>
<br>
// Check to see if this name was declared as a member previously<br>
NamedDecl *PrevDecl = nullptr;<br>
- LookupResult Previous(*this, II, Loc, LookupMemberName, ForRedeclaration);<br>
+ LookupResult Previous(*this, II, Loc, LookupMemberName,<br>
+ ForVisibleRedeclaration);<br>
LookupName(Previous, S);<br>
switch (Previous.getResultKind()) {<br>
case LookupResult::Found:<br>
@@ -14788,7 +14840,7 @@ Decl *Sema::ActOnIvar(Scope *S,<br>
<br>
if (II) {<br>
NamedDecl *PrevDecl = LookupSingleName(S, II, Loc, LookupMemberName,<br>
- ForRedeclaration);<br>
+ ForVisibleRedeclaration);<br>
if (PrevDecl && isDeclInScope(PrevDecl, EnclosingContext, S)<br>
&& !isa<TagDecl>(PrevDecl)) {<br>
Diag(Loc, diag::err_duplicate_member) << II;<br>
@@ -15509,7 +15561,7 @@ Sema::SkipBodyInfo Sema::shouldSkipAnonE<br>
// determine if we should merge the definition with an existing one and<br>
// skip the body.<br>
NamedDecl *PrevDecl = LookupSingleName(S, II, IILoc, LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ forRedeclarationInCurContext());<br>
auto *PrevECD = dyn_cast_or_null<EnumConstantDecl>(PrevDecl);<br>
if (!PrevECD)<br>
return SkipBodyInfo();<br>
@@ -15540,7 +15592,7 @@ Decl *Sema::ActOnEnumConstant(Scope *S,<br>
// Verify that there isn't already something declared with this name in this<br>
// scope.<br>
NamedDecl *PrevDecl = LookupSingleName(S, Id, IdLoc, LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ ForVisibleRedeclaration);<br>
if (PrevDecl && PrevDecl->isTemplateParameter()) {<br>
// Maybe we will complain about the shadowed template parameter.<br>
DiagnoseTemplateParameterShadow(IdLoc, PrevDecl);<br>
@@ -15567,8 +15619,7 @@ Decl *Sema::ActOnEnumConstant(Scope *S,<br>
// enum constant will 'hide' the tag.<br>
assert((getLangOpts().CPlusPlus || !isa<TagDecl>(PrevDecl)) &&<br>
"Received TagDecl when not in C++!");<br>
- if (!isa<TagDecl>(PrevDecl) && isDeclInScope(PrevDecl, CurContext, S) &&<br>
- shouldLinkPossiblyHiddenDecl(PrevDecl, New)) {<br>
+ if (!isa<TagDecl>(PrevDecl) && isDeclInScope(PrevDecl, CurContext, S)) {<br>
if (isa<EnumConstantDecl>(PrevDecl))<br>
Diag(IdLoc, diag::err_redefinition_of_enumerator) << Id;<br>
else<br>
@@ -16150,7 +16201,8 @@ Sema::DeclGroupPtrTy Sema::ActOnModuleDe<br>
else if (const auto *FE = M->getASTFile())<br>
Diag(M->DefinitionLoc, diag::note_prev_module_definition_from_ast_file)<br>
<< FE->getName();<br>
- return nullptr;<br>
+ Mod = M;<br>
+ break;<br>
}<br>
<br>
// Create a Module for the module that we're defining.<br>
@@ -16169,6 +16221,7 @@ Sema::DeclGroupPtrTy Sema::ActOnModuleDe<br>
PP.getIdentifierInfo(ModuleName), Path[0].second);<br>
Mod = getModuleLoader().loadModule(ModuleLoc, Path, Module::AllVisible,<br>
/*IsIncludeDirective=*/false);<br>
+ // FIXME: Produce an error in this case.<br>
if (!Mod)<br>
return nullptr;<br>
break;<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaDeclCXX.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclCXX.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclCXX.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaDeclCXX.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaDeclCXX.cpp Mon Oct 9 16:42:09 2017<br>
@@ -790,7 +790,7 @@ Sema::ActOnDecompositionDeclarator(Scope<br>
// Check for name conflicts.<br>
DeclarationNameInfo NameInfo(B.Name, B.NameLoc);<br>
LookupResult Previous(*this, NameInfo, LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ ForVisibleRedeclaration);<br>
LookupName(Previous, S,<br>
/*CreateBuiltins*/DC->getRedeclContext()->isTranslationUnit());<br>
<br>
@@ -822,7 +822,8 @@ Sema::ActOnDecompositionDeclarator(Scope<br>
// is unnamed.<br>
DeclarationNameInfo NameInfo((IdentifierInfo *)nullptr,<br>
Decomp.getLSquareLoc());<br>
- LookupResult Previous(*this, NameInfo, LookupOrdinaryName, ForRedeclaration);<br>
+ LookupResult Previous(*this, NameInfo, LookupOrdinaryName,<br>
+ ForVisibleRedeclaration);<br>
<br>
// Build the variable that holds the non-decomposed object.<br>
bool AddToScope = true;<br>
@@ -8465,7 +8466,8 @@ Decl *Sema::ActOnStartNamespaceDef(Scope<br>
// Since namespace names are unique in their scope, and we don't<br>
// look through using directives, just look for any ordinary names<br>
// as if by qualified name lookup.<br>
- LookupResult R(*this, II, IdentLoc, LookupOrdinaryName, ForRedeclaration);<br>
+ LookupResult R(*this, II, IdentLoc, LookupOrdinaryName,<br>
+ ForExternalRedeclaration);<br>
LookupQualifiedName(R, CurContext->getRedeclContext());<br>
NamedDecl *PrevDecl =<br>
R.isSingleResult() ? R.getRepresentativeDecl() : nullptr;<br>
@@ -9402,7 +9404,7 @@ NamedDecl *Sema::BuildUsingDeclaration(S<br>
<br>
// Do the redeclaration lookup in the current scope.<br>
LookupResult Previous(*this, UsingName, LookupUsingDeclName,<br>
- ForRedeclaration);<br>
+ ForVisibleRedeclaration);<br>
Previous.setHideTags(false);<br>
if (S) {<br>
LookupName(Previous, S);<br>
@@ -9982,7 +9984,10 @@ Decl *Sema::ActOnAliasDeclaration(Scope<br>
TInfo->getTypeLoc().getBeginLoc());<br>
}<br>
<br>
- LookupResult Previous(*this, NameInfo, LookupOrdinaryName, ForRedeclaration);<br>
+ LookupResult Previous(*this, NameInfo, LookupOrdinaryName,<br>
+ TemplateParamLists.size()<br>
+ ? forRedeclarationInCurContext()<br>
+ : ForVisibleRedeclaration);<br>
LookupName(Previous, S);<br>
<br>
// Warn about shadowing the name of a template parameter.<br>
@@ -10085,8 +10090,10 @@ Decl *Sema::ActOnAliasDeclaration(Scope<br>
<br>
if (Invalid)<br>
NewDecl->setInvalidDecl();<br>
- else if (OldDecl)<br>
+ else if (OldDecl) {<br>
NewDecl->setPreviousDecl(OldDecl);<br>
+ CheckRedeclarationModuleOwnership(NewDecl, OldDecl);<br>
+ }<br>
<br>
NewND = NewDecl;<br>
} else {<br>
@@ -10127,7 +10134,7 @@ Decl *Sema::ActOnNamespaceAliasDef(Scope<br>
<br>
// Check if we have a previous declaration with the same name.<br>
LookupResult PrevR(*this, Alias, AliasLoc, LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ ForVisibleRedeclaration);<br>
LookupName(PrevR, S);<br>
<br>
// Check we're not shadowing a template parameter.<br>
@@ -10340,7 +10347,8 @@ void Sema::CheckImplicitSpecialMemberDec<br>
// implicit special members with this name.<br>
DeclarationName Name = FD->getDeclName();<br>
LookupResult R(*this, Name, SourceLocation(), LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ FD->isExternallyDeclarable() ? ForExternalRedeclaration<br>
+ : ForVisibleRedeclaration);<br>
for (auto *D : FD->getParent()->lookup(Name))<br>
if (auto *Acceptable = R.getAcceptableDecl(D))<br>
R.addDecl(Acceptable);<br>
@@ -13224,7 +13232,7 @@ Decl *Sema::ActOnExceptionDeclarator(Sco<br>
IdentifierInfo *II = D.getIdentifier();<br>
if (NamedDecl *PrevDecl = LookupSingleName(S, II, D.getIdentifierLoc(),<br>
LookupOrdinaryName,<br>
- ForRedeclaration)) {<br>
+ ForVisibleRedeclaration)) {<br>
// The scope should be freshly made just for us. There is just no way<br>
// it contains any previous declaration, except for function parameters in<br>
// a function-try-block's catch statement.<br>
@@ -13673,7 +13681,7 @@ NamedDecl *Sema::ActOnFriendFunctionDecl<br>
DeclContext *DC;<br>
Scope *DCScope = S;<br>
LookupResult Previous(*this, NameInfo, LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ ForExternalRedeclaration);<br>
<br>
// There are five cases here.<br>
// - There's no scope specifier and we're in a local class. Only look<br>
@@ -14947,7 +14955,8 @@ MSPropertyDecl *Sema::HandleMSProperty(S<br>
<br>
// Check to see if this name was declared as a member previously<br>
NamedDecl *PrevDecl = nullptr;<br>
- LookupResult Previous(*this, II, Loc, LookupMemberName, ForRedeclaration);<br>
+ LookupResult Previous(*this, II, Loc, LookupMemberName,<br>
+ ForVisibleRedeclaration);<br>
LookupName(Previous, S);<br>
switch (Previous.getResultKind()) {<br>
case LookupResult::Found:<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaDeclObjC.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclObjC.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaDeclObjC.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaDeclObjC.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaDeclObjC.cpp Mon Oct 9 16:42:09 2017<br>
@@ -943,8 +943,9 @@ ActOnStartClassInterface(Scope *S, Sourc<br>
assert(ClassName && "Missing class identifier");<br>
<br>
// Check for another declaration kind with the same name.<br>
- NamedDecl *PrevDecl = LookupSingleName(TUScope, ClassName, ClassLoc,<br>
- LookupOrdinaryName, ForRedeclaration);<br>
+ NamedDecl *PrevDecl =<br>
+ LookupSingleName(TUScope, ClassName, ClassLoc, LookupOrdinaryName,<br>
+ forRedeclarationInCurContext());<br>
<br>
if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {<br>
Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName;<br>
@@ -1095,16 +1096,18 @@ Decl *Sema::ActOnCompatibilityAlias(Sour<br>
IdentifierInfo *ClassName,<br>
SourceLocation ClassLocation) {<br>
// Look for previous declaration of alias name<br>
- NamedDecl *ADecl = LookupSingleName(TUScope, AliasName, AliasLocation,<br>
- LookupOrdinaryName, ForRedeclaration);<br>
+ NamedDecl *ADecl =<br>
+ LookupSingleName(TUScope, AliasName, AliasLocation, LookupOrdinaryName,<br>
+ forRedeclarationInCurContext());<br>
if (ADecl) {<br>
Diag(AliasLocation, diag::err_conflicting_aliasing_type) << AliasName;<br>
Diag(ADecl->getLocation(), diag::note_previous_declaration);<br>
return nullptr;<br>
}<br>
// Check for class declaration<br>
- NamedDecl *CDeclU = LookupSingleName(TUScope, ClassName, ClassLocation,<br>
- LookupOrdinaryName, ForRedeclaration);<br>
+ NamedDecl *CDeclU =<br>
+ LookupSingleName(TUScope, ClassName, ClassLocation, LookupOrdinaryName,<br>
+ forRedeclarationInCurContext());<br>
if (const TypedefNameDecl *TDecl =<br>
dyn_cast_or_null<TypedefNameDecl>(CDeclU)) {<br>
QualType T = TDecl->getUnderlyingType();<br>
@@ -1112,7 +1115,8 @@ Decl *Sema::ActOnCompatibilityAlias(Sour<br>
if (NamedDecl *IDecl = T->getAs<ObjCObjectType>()->getInterface()) {<br>
ClassName = IDecl->getIdentifier();<br>
CDeclU = LookupSingleName(TUScope, ClassName, ClassLocation,<br>
- LookupOrdinaryName, ForRedeclaration);<br>
+ LookupOrdinaryName,<br>
+ forRedeclarationInCurContext());<br>
}<br>
}<br>
}<br>
@@ -1174,7 +1178,7 @@ Sema::ActOnStartProtocolInterface(Source<br>
// FIXME: Deal with AttrList.<br>
assert(ProtocolName && "Missing protocol identifier");<br>
ObjCProtocolDecl *PrevDecl = LookupProtocol(ProtocolName, ProtocolLoc,<br>
- ForRedeclaration);<br>
+ forRedeclarationInCurContext());<br>
ObjCProtocolDecl *PDecl = nullptr;<br>
if (ObjCProtocolDecl *Def = PrevDecl? PrevDecl->getDefinition() : nullptr) {<br>
// If we already have a definition, complain.<br>
@@ -1730,7 +1734,7 @@ Sema::ActOnForwardProtocolDeclaration(So<br>
for (const IdentifierLocPair &IdentPair : IdentList) {<br>
IdentifierInfo *Ident = IdentPair.first;<br>
ObjCProtocolDecl *PrevDecl = LookupProtocol(Ident, IdentPair.second,<br>
- ForRedeclaration);<br>
+ forRedeclarationInCurContext());<br>
ObjCProtocolDecl *PDecl<br>
= ObjCProtocolDecl::Create(Context, CurContext, Ident,<br>
IdentPair.second, AtProtocolLoc,<br>
@@ -1921,7 +1925,7 @@ Decl *Sema::ActOnStartClassImplementatio<br>
// Check for another declaration kind with the same name.<br>
NamedDecl *PrevDecl<br>
= LookupSingleName(TUScope, ClassName, ClassLoc, LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ forRedeclarationInCurContext());<br>
if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {<br>
Diag(ClassLoc, diag::err_redefinition_different_kind) << ClassName;<br>
Diag(PrevDecl->getLocation(), diag::note_previous_definition);<br>
@@ -2997,7 +3001,7 @@ Sema::ActOnForwardClassDeclaration(Sourc<br>
// Check for another declaration kind with the same name.<br>
NamedDecl *PrevDecl<br>
= LookupSingleName(TUScope, IdentList[i], IdentLocs[i],<br>
- LookupOrdinaryName, ForRedeclaration);<br>
+ LookupOrdinaryName, forRedeclarationInCurContext());<br>
if (PrevDecl && !isa<ObjCInterfaceDecl>(PrevDecl)) {<br>
// GCC apparently allows the following idiom:<br>
//<br>
@@ -4443,7 +4447,7 @@ Decl *Sema::ActOnMethodDeclaration(<br>
}<br>
<br>
LookupResult R(*this, ArgInfo[i].Name, ArgInfo[i].NameLoc,<br>
- LookupOrdinaryName, ForRedeclaration);<br>
+ LookupOrdinaryName, forRedeclarationInCurContext());<br>
LookupName(R, S);<br>
if (R.isSingleResult()) {<br>
NamedDecl *PrevDecl = R.getFoundDecl();<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaExprMember.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaExprMember.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaExprMember.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaExprMember.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaExprMember.cpp Mon Oct 9 16:42:09 2017<br>
@@ -693,8 +693,7 @@ static bool LookupMemberExprInRecord(Sem<br>
Sema::RedeclarationKind Redecl;<br>
};<br>
QueryState Q = {R.getSema(), R.getLookupNameInfo(), R.getLookupKind(),<br>
- R.isForRedeclaration() ? Sema::ForRedeclaration<br>
- : Sema::NotForRedeclaration};<br>
+ R.redeclarationKind()};<br>
TE = SemaRef.CorrectTypoDelayed(<br>
R.getLookupNameInfo(), R.getLookupKind(), nullptr, &SS,<br>
llvm::make_unique<RecordMemberExprValidatorCCC>(RTy),<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaLookup.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaLookup.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaLookup.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaLookup.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaLookup.cpp Mon Oct 9 16:42:09 2017<br>
@@ -1609,11 +1609,39 @@ bool Sema::isVisibleSlow(const NamedDecl<br>
}<br>
<br>
bool Sema::shouldLinkPossiblyHiddenDecl(LookupResult &R, const NamedDecl *New) {<br>
+ // FIXME: If there are both visible and hidden declarations, we need to take<br>
+ // into account whether redeclaration is possible. Example:<br>
+ //<br>
+ // Non-imported module:<br>
+ // int f(T); // #1<br>
+ // Some TU:<br>
+ // static int f(U); // #2, not a redeclaration of #1<br>
+ // int f(T); // #3, finds both, should link with #1 if T != U, but<br>
+ // // with #2 if T == U; neither should be ambiguous.<br>
for (auto *D : R) {<br>
if (isVisible(D))<br>
return true;<br>
+ assert(D->isExternallyDeclarable() &&<br>
+ "should not have hidden, non-externally-declarable result here");<br>
}<br>
- return New->isExternallyVisible();<br>
+<br>
+ // This function is called once "New" is essentially complete, but before a<br>
+ // previous declaration is attached. We can't query the linkage of "New" in<br>
+ // general, because attaching the previous declaration can change the<br>
+ // linkage of New to match the previous declaration.<br>
+ //<br>
+ // However, because we've just determined that there is no *visible* prior<br>
+ // declaration, we can compute the linkage here. There are two possibilities:<br>
+ //<br>
+ // * This is not a redeclaration; it's safe to compute the linkage now.<br>
+ //<br>
+ // * This is a redeclaration of a prior declaration that is externally<br>
+ // redeclarable. In that case, the linkage of the declaration is not<br>
+ // changed by attaching the prior declaration, because both are externally<br>
+ // declarable (and thus ExternalLinkage or VisibleNoLinkage).<br>
+ //<br>
+ // FIXME: This is subtle and fragile.<br>
+ return New->isExternallyDeclarable();<br>
}<br>
<br>
/// \brief Retrieve the visible declaration corresponding to D, if any.<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaOpenMP.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaOpenMP.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaOpenMP.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaOpenMP.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaOpenMP.cpp Mon Oct 9 16:42:09 2017<br>
@@ -11539,7 +11539,7 @@ Sema::DeclGroupPtrTy Sema::ActOnOpenMPDe<br>
Decls.reserve(ReductionTypes.size());<br>
<br>
LookupResult Lookup(*this, Name, SourceLocation(), LookupOMPReductionName,<br>
- ForRedeclaration);<br>
+ forRedeclarationInCurContext());<br>
// [OpenMP 4.0], 2.15 declare reduction Directive, Restrictions<br>
// A reduction-identifier may not be re-declared in the current scope for the<br>
// same type or for a type that is compatible according to the base language<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaTemplate.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaTemplate.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaTemplate.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaTemplate.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaTemplate.cpp Mon Oct 9 16:42:09 2017<br>
@@ -778,7 +778,7 @@ static void maybeDiagnoseTemplateParamet<br>
SourceLocation Loc,<br>
IdentifierInfo *Name) {<br>
NamedDecl *PrevDecl = SemaRef.LookupSingleName(<br>
- S, Name, Loc, Sema::LookupOrdinaryName, Sema::ForRedeclaration);<br>
+ S, Name, Loc, Sema::LookupOrdinaryName, Sema::ForVisibleRedeclaration);<br>
if (PrevDecl && PrevDecl->isTemplateParameter())<br>
SemaRef.DiagnoseTemplateParameterShadow(Loc, PrevDecl);<br>
}<br>
@@ -1133,7 +1133,7 @@ Sema::CheckClassTemplate(Scope *S, unsig<br>
LookupResult Previous(*this, Name, NameLoc,<br>
(SS.isEmpty() && TUK == TUK_Friend)<br>
? LookupTagName : LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ forRedeclarationInCurContext());<br>
if (SS.isNotEmpty() && !SS.isInvalid()) {<br>
SemanticContext = computeDeclContext(SS, true);<br>
if (!SemanticContext) {<br>
@@ -1192,8 +1192,8 @@ Sema::CheckClassTemplate(Scope *S, unsig<br>
<br>
// If there is a previous declaration with the same name, check<br>
// whether this is a valid redeclaration.<br>
- ClassTemplateDecl *PrevClassTemplate<br>
- = dyn_cast_or_null<ClassTemplateDecl>(PrevDecl);<br>
+ ClassTemplateDecl *PrevClassTemplate =<br>
+ dyn_cast_or_null<ClassTemplateDecl>(PrevDecl);<br>
<br>
// We may have found the injected-class-name of a class template,<br>
// class template partial specialization, or class template specialization.<br>
@@ -1484,6 +1484,9 @@ Sema::CheckClassTemplate(Scope *S, unsig<br>
CurContext->addDecl(Friend);<br>
}<br>
<br>
+ if (PrevClassTemplate)<br>
+ CheckRedeclarationModuleOwnership(NewTemplate, PrevClassTemplate);<br>
+<br>
if (Invalid) {<br>
NewTemplate->setInvalidDecl();<br>
NewClass->setInvalidDecl();<br>
@@ -3677,7 +3680,7 @@ DeclResult Sema::ActOnVarTemplateSpecial<br>
// Check that this isn't a redefinition of this specialization,<br>
// merging with previous declarations.<br>
LookupResult PrevSpec(*this, GetNameForDeclarator(D), LookupOrdinaryName,<br>
- ForRedeclaration);<br>
+ forRedeclarationInCurContext());<br>
PrevSpec.addDecl(PrevDecl);<br>
D.setRedeclaration(CheckVariableDeclaration(Specialization, PrevSpec));<br>
} else if (Specialization->isStaticDataMember() &&<br>
<br>
Modified: cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp (original)<br>
+++ cfe/trunk/lib/Sema/SemaTemplateInstantiateDecl.cpp Mon Oct 9 16:42:09 2017<br>
@@ -1195,7 +1195,8 @@ Decl *TemplateDeclInstantiator::VisitCla<br>
// Look for a previous declaration of the template in the owning<br>
// context.<br>
LookupResult R(SemaRef, Pattern->getDeclName(), Pattern->getLocation(),<br>
- Sema::LookupOrdinaryName, Sema::ForRedeclaration);<br>
+ Sema::LookupOrdinaryName,<br>
+ SemaRef.forRedeclarationInCurContext());<br>
SemaRef.LookupQualifiedName(R, DC);<br>
<br>
if (R.isSingleResult()) {<br>
@@ -1735,7 +1736,8 @@ Decl *TemplateDeclInstantiator::VisitFun<br>
SemaRef, Function->getDeclName(), SourceLocation(),<br>
D->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage<br>
: Sema::LookupOrdinaryName,<br>
- Sema::ForRedeclaration);<br>
+ D->isLocalExternDecl() ? Sema::ForExternalRedeclaration<br>
+ : SemaRef.forRedeclarationInCurContext());<br>
<br>
if (DependentFunctionTemplateSpecializationInfo *Info<br>
= D->getDependentSpecializationInfo()) {<br>
@@ -2053,7 +2055,7 @@ TemplateDeclInstantiator::VisitCXXMethod<br>
Method->setInvalidDecl();<br>
<br>
LookupResult Previous(SemaRef, NameInfo, Sema::LookupOrdinaryName,<br>
- Sema::ForRedeclaration);<br>
+ Sema::ForExternalRedeclaration);<br>
<br>
if (!FunctionTemplate || TemplateParams || isFriend) {<br>
SemaRef.LookupQualifiedName(Previous, Record);<br>
@@ -2492,7 +2494,7 @@ Decl *TemplateDeclInstantiator::VisitUsi<br>
bool CheckRedeclaration = Owner->isRecord();<br>
<br>
LookupResult Prev(SemaRef, NameInfo, Sema::LookupUsingDeclName,<br>
- Sema::ForRedeclaration);<br>
+ Sema::ForVisibleRedeclaration);<br>
<br>
UsingDecl *NewUD = UsingDecl::Create(SemaRef.Context, Owner,<br>
D->getUsingLoc(),<br>
@@ -2711,7 +2713,7 @@ Decl *TemplateDeclInstantiator::VisitCla<br>
return nullptr;<br>
<br>
LookupResult Previous(SemaRef, NewFD->getNameInfo(), Sema::LookupOrdinaryName,<br>
- Sema::ForRedeclaration);<br>
+ Sema::ForExternalRedeclaration);<br>
<br>
TemplateArgumentListInfo TemplateArgs;<br>
TemplateArgumentListInfo *TemplateArgsPtr = nullptr;<br>
@@ -4074,7 +4076,8 @@ void Sema::BuildVariableInstantiation(<br>
*this, NewVar->getDeclName(), NewVar->getLocation(),<br>
NewVar->isLocalExternDecl() ? Sema::LookupRedeclarationWithLinkage<br>
: Sema::LookupOrdinaryName,<br>
- Sema::ForRedeclaration);<br>
+ NewVar->isLocalExternDecl() ? Sema::ForExternalRedeclaration<br>
+ : forRedeclarationInCurContext());<br>
<br>
if (NewVar->isLocalExternDecl() && OldVar->getPreviousDecl() &&<br>
(!OldVar->getPreviousDecl()->getDeclContext()->isDependentContext() ||<br>
@@ -4432,7 +4435,7 @@ void Sema::InstantiateVariableDefinition<br>
<br>
// Merge the definition with the declaration.<br>
LookupResult R(*this, Var->getDeclName(), Var->getLocation(),<br>
- LookupOrdinaryName, ForRedeclaration);<br>
+ LookupOrdinaryName, forRedeclarationInCurContext());<br>
R.addDecl(OldVar);<br>
MergeVarDecl(Var, R);<br>
<br>
<br>
Added: cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/global-vs-module.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/global-vs-module.cpp?rev=315251&view=auto" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/global-vs-module.cpp?rev=315251&view=auto</a><br>
==============================================================================<br>
--- cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/global-vs-module.cpp (added)<br>
+++ cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/global-vs-module.cpp Mon Oct 9 16:42:09 2017<br>
@@ -0,0 +1,55 @@<br>
+// RUN: %clang_cc1 -fmodules-ts -verify -std=c++17 %s<br>
+// RUN: %clang_cc1 -fmodules-ts -verify -std=c++17 %s -DEXPORT<br>
+// RUN: %clang_cc1 -fmodules-ts -verify -std=c++17 %s -DUSING<br>
+<br>
+#ifndef NO_GLOBAL<br>
+extern int var; // expected-note {{previous declaration is here}}<br>
+int func(); // expected-note {{previous declaration is here}}<br>
+struct str; // expected-note {{previous declaration is here}}<br>
+using type = int;<br>
+<br>
+template<typename> extern int var_tpl; // expected-note {{previous declaration is here}}<br>
+template<typename> int func_tpl(); // expected-note-re {{{{previous declaration is here|target of using declaration}}}}<br>
+template<typename> struct str_tpl; // expected-note {{previous declaration is here}}<br>
+template<typename> using type_tpl = int; // expected-note {{previous declaration is here}}<br>
+<br>
+typedef int type;<br>
+namespace ns { using ::func; }<br>
+namespace ns_alias = ns;<br>
+#endif<br>
+<br>
+export module M;<br>
+<br>
+#ifdef USING<br>
+using ::var;<br>
+using ::func;<br>
+using ::str;<br>
+using ::type;<br>
+using ::var_tpl;<br>
+using ::func_tpl; // expected-note {{using declaration}}<br>
+using ::str_tpl;<br>
+using ::type_tpl;<br>
+#endif<br>
+<br>
+#ifdef EXPORT<br>
+export {<br>
+#endif<br>
+<br>
+extern int var; // expected-error {{declaration of 'var' in module M follows declaration in the global module}}<br>
+int func(); // expected-error {{declaration of 'func' in module M follows declaration in the global module}}<br>
+struct str; // expected-error {{declaration of 'str' in module M follows declaration in the global module}}<br>
+using type = int;<br>
+<br>
+template<typename> extern int var_tpl; // expected-error {{declaration of 'var_tpl' in module M follows declaration in the global module}}<br>
+// FIXME: Is this the right diagnostic in the -DUSING case?<br>
+template<typename> int func_tpl(); // expected-error-re {{{{declaration of 'func_tpl' in module M follows declaration in the global module|conflicts with target of using declaration}}}}<br>
+template<typename> struct str_tpl; // expected-error {{declaration of 'str_tpl' in module M follows declaration in the global module}}<br>
+template<typename> using type_tpl = int; // expected-error {{declaration of 'type_tpl' in module M follows declaration in the global module}}<br>
+<br>
+typedef int type;<br>
+namespace ns { using ::func; }<br>
+namespace ns_alias = ns;<br>
+<br>
+#ifdef EXPORT<br>
+}<br>
+#endif<br>
<br>
Added: cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-global.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-global.cpp?rev=315251&view=auto" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-global.cpp?rev=315251&view=auto</a><br>
==============================================================================<br>
--- cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-global.cpp (added)<br>
+++ cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-global.cpp Mon Oct 9 16:42:09 2017<br>
@@ -0,0 +1,19 @@<br>
+// RUN: rm -rf %t<br>
+// RUN: %clang_cc1 -fmodules-ts -emit-module-interface -std=c++17 %S/global-vs-module.cpp -o %t -DNO_GLOBAL -DEXPORT<br>
+// RUN: %clang_cc1 -fmodules-ts -verify -std=c++17 %s -fmodule-file=%t<br>
+<br>
+import M;<br>
+<br>
+extern int var; // expected-error {{declaration of 'var' in the global module follows declaration in module M}} expected-note@global-vs-module.cpp:38 {{previous}}<br>
+int func(); // expected-error {{declaration of 'func' in the global module follows declaration in module M}} expected-note@global-vs-module.cpp:39 {{previous}}<br>
+struct str; // expected-error {{declaration of 'str' in the global module follows declaration in module M}} expected-note@global-vs-module.cpp:40 {{previous}}<br>
+using type = int;<br>
+<br>
+template<typename> extern int var_tpl; // expected-error {{declaration of 'var_tpl' in the global module follows declaration in module M}} expected-note@global-vs-module.cpp:43 {{previous}}<br>
+template<typename> int func_tpl(); // expected-error {{declaration of 'func_tpl' in the global module follows declaration in module M}} expected-note@global-vs-module.cpp:45 {{previous}}<br>
+template<typename> struct str_tpl; // expected-error {{declaration of 'str_tpl' in the global module follows declaration in module M}} expected-note@global-vs-module.cpp:46 {{previous}}<br>
+template<typename> using type_tpl = int; // expected-error {{declaration of 'type_tpl' in the global module follows declaration in module M}} expected-note@global-vs-module.cpp:47 {{previous}}<br>
+<br>
+typedef int type;<br>
+namespace ns { using ::func; }<br>
+namespace ns_alias = ns;<br>
<br>
Added: cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-module.cpp<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-module.cpp?rev=315251&view=auto" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-module.cpp?rev=315251&view=auto</a><br>
==============================================================================<br>
--- cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-module.cpp (added)<br>
+++ cfe/trunk/test/CXX/modules-ts/basic/basic.def.odr/p6/module-vs-module.cpp Mon Oct 9 16:42:09 2017<br>
@@ -0,0 +1,44 @@<br>
+// RUN: rm -rf %t<br>
+// RUN: mkdir %t<br>
+//<br>
+// Some of the following tests intentionally have no -verify in their RUN<br>
+// lines; we are testing that those cases do not produce errors.<br>
+//<br>
+// RUN: %clang_cc1 -fmodules-ts -std=c++17 %S/global-vs-module.cpp -emit-module-interface -o %t/M.pcm -DNO_GLOBAL -DEXPORT<br>
+// RUN: %clang_cc1 -fmodules-ts -std=c++17 %s -fmodule-file=%t/M.pcm -DMODULE_INTERFACE -verify<br>
+// RUN: %clang_cc1 -fmodules-ts -std=c++17 %s -fmodule-file=%t/M.pcm -DMODULE_INTERFACE -DNO_IMPORT<br>
+//<br>
+// RUN: %clang_cc1 -fmodules-ts -std=c++17 %s -fmodule-file=%t/M.pcm -emit-module-interface -o %t/N.pcm -DMODULE_INTERFACE -DNO_ERRORS<br>
+// RUN: %clang_cc1 -fmodules-ts -std=c++17 %s -fmodule-file=%t/N.pcm -verify<br>
+// FIXME: Once we start importing "import" declarations properly, this should<br>
+// be rejected (-verify should be added to the following line).<br>
+// RUN: %clang_cc1 -fmodules-ts -std=c++17 %s -fmodule-file=%t/N.pcm -DNO_IMPORT<br>
+//<br>
+// RUN: %clang_cc1 -fmodules-ts -std=c++17 %s -fmodule-file=%t/M.pcm -emit-module-interface -o %t/N-no-M.pcm -DMODULE_INTERFACE -DNO_ERRORS -DNO_IMPORT<br>
+// RUN: %clang_cc1 -fmodules-ts -std=c++17 %s -fmodule-file=%t/N-no-M.pcm -verify<br>
+// RUN: %clang_cc1 -fmodules-ts -std=c++17 %s -fmodule-file=%t/N-no-M.pcm -DNO_IMPORT<br>
+<br>
+#ifdef MODULE_INTERFACE<br>
+export<br>
+#endif<br>
+module N;<br>
+<br>
+#ifndef NO_IMPORT<br>
+import M;<br>
+#endif<br>
+<br>
+#ifndef NO_ERRORS<br>
+extern int var; // expected-error {{declaration of 'var' in module N follows declaration in module M}} expected-note@global-vs-module.cpp:38 {{previous}}<br>
+int func(); // expected-error {{declaration of 'func' in module N follows declaration in module M}} expected-note@global-vs-module.cpp:39 {{previous}}<br>
+struct str; // expected-error {{declaration of 'str' in module N follows declaration in module M}} expected-note@global-vs-module.cpp:40 {{previous}}<br>
+using type = int;<br>
+<br>
+template<typename> extern int var_tpl; // expected-error {{declaration of 'var_tpl' in module N follows declaration in module M}} expected-note@global-vs-module.cpp:43 {{previous}}<br>
+template<typename> int func_tpl(); // expected-error {{declaration of 'func_tpl' in module N follows declaration in module M}} expected-note@global-vs-module.cpp:45 {{previous}}<br>
+template<typename> struct str_tpl; // expected-error {{declaration of 'str_tpl' in module N follows declaration in module M}} expected-note@global-vs-module.cpp:46 {{previous}}<br>
+template<typename> using type_tpl = int; // expected-error {{declaration of 'type_tpl' in module N follows declaration in module M}} expected-note@global-vs-module.cpp:47 {{previous}}<br>
+<br>
+typedef int type;<br>
+namespace ns { using ::func; }<br>
+namespace ns_alias = ns;<br>
+#endif<br>
<br>
Modified: cfe/trunk/test/SemaCXX/modules-ts.cppm<br>
URL: <a href="http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/modules-ts.cppm?rev=315251&r1=315250&r2=315251&view=diff" rel="noreferrer" target="_blank">http://llvm.org/viewvc/llvm-project/cfe/trunk/test/SemaCXX/modules-ts.cppm?rev=315251&r1=315250&r2=315251&view=diff</a><br>
==============================================================================<br>
--- cfe/trunk/test/SemaCXX/modules-ts.cppm (original)<br>
+++ cfe/trunk/test/SemaCXX/modules-ts.cppm Mon Oct 9 16:42:09 2017<br>
@@ -14,7 +14,7 @@ export module foo;<br>
#endif<br>
<br>
static int m;<br>
-#if TEST == 2 // FIXME: 'm' has internal linkage, so there should be no error here<br>
+#if TEST == 2<br>
// expected-error@-2 {{redefinition of '}}<br>
// expected-note@-3 {{unguarded header; consider using #ifdef guards or #pragma once}}<br>
// FIXME: We should drop the "header from" in this diagnostic.<br>
<br>
<br>
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