DmitryPolukhin created this revision.
DmitryPolukhin added a reviewer: majnemer.
DmitryPolukhin added subscribers: cfe-commits, aaron.ballman, stbuehler.
Original patch by Stefan Bühler http://reviews.llvm.org/D12834
Difference between original and this one:
- fixed all failing tests
- fixed mangling for global variable outside namespace
- emit ABI tags for guards and local names (i.e. GCC ABI 10+)
- clang-format + other stylistic changes
Sema part is here: http://reviews.llvm.org/D17567
http://reviews.llvm.org/D18035
Files:
include/clang/Basic/AttrDocs.td
lib/AST/ItaniumMangle.cpp
lib/Sema/SemaDeclAttr.cpp
test/CodeGenCXX/mangle-abi-tag.cpp
test/SemaCXX/attr-abi-tag-syntax.cpp
test/SemaCXX/attr-abi-tag.cpp
Index: test/SemaCXX/attr-abi-tag.cpp
===================================================================
--- /dev/null
+++ test/SemaCXX/attr-abi-tag.cpp
@@ -0,0 +1,13 @@
+// RUN: %clang_cc1 -x c++ -std=c++11 -triple x86_64-unknown-linux -emit-llvm < %s | FileCheck %s
+
+// CHECK: @_Z5Func1B6Names1v()
+inline namespace Names1 __attribute__((__abi_tag__)) {
+ class C1 {};
+}
+C1 Func1() { return C1(); }
+
+// CHECK: @_Z5Func2B4Tag1B4Tag2v()
+inline namespace Names2 __attribute__((__abi_tag__("Tag1", "Tag2"))) {
+ class C2 {};
+}
+C2 Func2() { return C2(); }
Index: test/SemaCXX/attr-abi-tag-syntax.cpp
===================================================================
--- test/SemaCXX/attr-abi-tag-syntax.cpp
+++ test/SemaCXX/attr-abi-tag-syntax.cpp
@@ -16,28 +16,18 @@
// expected-warning@-1 {{'abi_tag' attribute on anonymous namespace ignored}}
inline namespace N __attribute__((__abi_tag__)) {}
-// FIXME: remove this warning as soon as attribute fully supported.
-// expected-warning@-2 {{'__abi_tag__' attribute ignored}}
} // namespcace N2
__attribute__((abi_tag("B", "A"))) extern int a1;
-// FIXME: remove this warning as soon as attribute fully supported.
-// expected-warning@-2 {{'abi_tag' attribute ignored}}
__attribute__((abi_tag("A", "B"))) extern int a1;
// expected-note@-1 {{previous declaration is here}}
-// FIXME: remove this warning as soon as attribute fully supported.
-// expected-warning@-3 {{'abi_tag' attribute ignored}}
__attribute__((abi_tag("A", "C"))) extern int a1;
// expected-error@-1 {{'abi_tag' C missing in original declaration}}
-// FIXME: remove this warning as soon as attribute fully supported.
-// expected-warning@-3 {{'abi_tag' attribute ignored}}
extern int a2;
// expected-note@-1 {{previous declaration is here}}
__attribute__((abi_tag("A")))extern int a2;
// expected-error@-1 {{cannot add 'abi_tag' attribute in a redeclaration}}
-// FIXME: remove this warning as soon as attribute fully supported.
-// expected-warning@-3 {{'abi_tag' attribute ignored}}
Index: test/CodeGenCXX/mangle-abi-tag.cpp
===================================================================
--- /dev/null
+++ test/CodeGenCXX/mangle-abi-tag.cpp
@@ -0,0 +1,124 @@
+// RUN: %clang_cc1 %s -emit-llvm -triple %itanium_abi_triple -o - | FileCheck %s
+
+struct __attribute__((abi_tag("A", "B"))) A { };
+
+struct B: A { };
+
+template<class T>
+
+struct C {
+};
+
+struct D { A* p; };
+
+template<class T>
+struct __attribute__((abi_tag("C", "D"))) E {
+};
+
+struct __attribute__((abi_tag("A", "B"))) F { };
+
+A a1;
+// CHECK: @_Z2a1B1AB1B =
+
+__attribute__((abi_tag("C", "D")))
+A a2;
+// CHECK: @_Z2a2B1AB1BB1CB1D =
+
+B a3;
+// CHECK: @a3 =
+
+C<A> a4;
+// CHECK: @_Z2a4B1AB1B =
+
+D a5;
+// CHECK: @a5 =
+
+E<int> a6;
+// CHECK: @_Z2a6B1CB1D =
+
+E<A> a7;
+// CHECK: @_Z2a7B1AB1BB1CB1D =
+
+template<>
+struct E<float> {
+ static float a8;
+};
+float E<float>::a8;
+// CHECK: @_ZN1EB1CB1DIfE2a8E =
+
+template<>
+struct E<F> {
+ static bool a9;
+};
+bool E<F>::a9;
+// CHECK: @_ZN1EB1CB1DI1FB1AB1BE2a9E =
+
+struct __attribute__((abi_tag("A", "B"))) A10 {
+ virtual ~A10() {}
+} a10;
+// vtable
+// CHECK: @_ZTV3A10B1AB1B =
+// typeinfo
+// CHECK: @_ZTI3A10B1AB1B =
+
+// Local variables from f9.
+// f9()::L::foo[abi:C][abi:D]()::a[abi:A][abi:B]
+// CHECK-DAG: @_ZZZ2f9vEN1L3fooB1CB1DEvE1aB1AB1B =
+// guard variable for f9()::L::foo[abi:C][abi:D]()::a[abi:A][abi:B]
+// CHECK-DAG: @_ZGVZZ2f9vEN1L3fooB1CB1DEvE1aB1AB1B =
+
+__attribute__ ((abi_tag("C", "D")))
+void* f1() {
+ return 0;
+}
+// CHECK: define {{.*}} @_Z2f1B1CB1Dv(
+
+__attribute__ ((abi_tag("C", "D")))
+A* f2() {
+ return 0;
+}
+// CHECK: define {{.*}} @_Z2f2B1AB1BB1CB1Dv(
+
+B* f3() {
+ return 0;
+}
+// CHECK: define {{.*}} @_Z2f3v(
+
+C<A>* f4() {
+ return 0;
+}
+// CHECK: define {{.*}} @_Z2f4B1AB1Bv(
+
+D* f5() {
+ return 0;
+}
+// CHECK: define {{.*}} @_Z2f5v(
+
+E<char>* f6() {
+ return 0;
+}
+// CHECK: define {{.*}} @_Z2f6B1CB1Dv(
+
+E<A>* f7() {
+ return 0;
+}
+// CHECK: define {{.*}} @_Z2f7B1AB1BB1CB1Dv(
+
+void f8(E<A>*) {
+}
+// CHECK: define {{.*}} @_Z2f8P1EB1CB1DI1AB1AB1BE(
+
+inline void f9() {
+ struct L {
+ static E<int>* foo() {
+ static A10 a;
+ return 0;
+ }
+ };
+ L::foo();
+}
+void f9_test() {
+ f9();
+}
+// f9()::L::foo[abi:C][abi:D]()
+// CHECK: define linkonce_odr %struct.E* @_ZZ2f9vEN1L3fooB1CB1DEv(
Index: lib/Sema/SemaDeclAttr.cpp
===================================================================
--- lib/Sema/SemaDeclAttr.cpp
+++ lib/Sema/SemaDeclAttr.cpp
@@ -4667,10 +4667,6 @@
D->addAttr(::new (S.Context)
AbiTagAttr(Attr.getRange(), S.Context, Tags.data(), Tags.size(),
Attr.getAttributeSpellingListIndex()));
-
- // FIXME: remove this warning as soon as mangled part is ready.
- S.Diag(Attr.getRange().getBegin(), diag::warn_attribute_ignored)
- << Attr.getName();
}
static void handleARMInterruptAttr(Sema &S, Decl *D,
Index: lib/AST/ItaniumMangle.cpp
===================================================================
--- lib/AST/ItaniumMangle.cpp
+++ lib/AST/ItaniumMangle.cpp
@@ -214,6 +214,8 @@
class CXXNameMangler {
ItaniumMangleContextImpl &Context;
raw_ostream &Out;
+ bool NullOut = false;
+ bool DisableDerivedAbiTags = false;
/// The "structor" is the top-level declaration being mangled, if
/// that's not a template specialization; otherwise it's the pattern
@@ -263,15 +265,176 @@
} FunctionTypeDepth;
+ // abi_tag is a gcc attribute, taking one or more strings called "tags".
+ //
+ // The goal is to annotate against which version of a library an object was
+ // build and to be able to provide backwards compatibility ("dual abi").
+ //
+ // For this the emitted mangled names have to be different, while you don't
+ // want the user to have to use different names in the source.
+ //
+ // The abi_tag can be present on Struct, Var and Function declarations as
+ // "explicit" tag, and on inline Namespace as "implicit" tag. Explicit tags
+ // are always emitted after the unqualified name, and (implicit) tags on
+ // namespace are not.
+ //
+ // For functions and variables there is a set of "implicitly available"
+ // tags. These tags are: all tags from the namespace/structs the name is
+ // embedded in, all tags from any template arguments of the name, and, for
+ // functions, alls tags used anywhere in the <bare-function-type> (i.e.
+ // parameters and sometimes the return type).
+ //
+ // For functions this is basically the list of all tags from the signature
+ // without the unqualified name and usually without the return type of the
+ // function. In `operator Type()` Type is NOT part of that list, as it is
+ // part of the unqualified name!
+ //
+ // Now all tags from the function return type/variable type which are not
+ // "implicitly available" must be added to the explicit list of tags, and
+ // are emitted after the unqualified name.
+ //
+ // Example:
+ // namespace std {
+ // inline namespace __cxx11 __attribute__((__abi_tag__("cxx11"))) { }
+ // inline namespace __cxx11 {
+ // struct string { };
+ // }
+ // }
+ //
+ // std::string foo(); // needs abi tag "cxx11" on foo
+ // std::string foo(std::string); // does NOT need abi tag "cxx11" on foo
+ // __attribute__((__abi_tag__("cxx11")))
+ // std::string foo2(std::string); // emit abi tag "cxx11" on foo anyway
+ //
+ // The tags are sorted by name before emitting, and are serialized as
+ // <abitag> ::= B <"tag" source-name>
+
+ typedef SmallVector<StringRef, 4> AbiTagList;
+
+ // State to gather all implicit and explicit tags used in a mangled name.
+ // Must always have an instance of this while emitting any name to keep
+ // track.
+ //
+ // FIXME: how to handle substituted names? They should add the tags used in
+ // the substitution to the list of available tags.
+ class AbiTagState final {
+ //! All abi tags used implicitly or explicitly
+ std::set<StringRef> UsedAbiTags;
+ //! All explicit abi tags (i.e. not from namespace)
+ std::set<StringRef> EmittedAbiTags;
+
+ AbiTagState *&LinkHead;
+ AbiTagState *Parent{ nullptr };
+
+ bool LinkActive{ false };
+
+ public:
+ explicit AbiTagState(AbiTagState *&linkHead) : LinkHead(linkHead) {
+ Parent = LinkHead;
+ LinkHead = this;
+ LinkActive = true;
+ }
+
+ // no copy, no move
+ AbiTagState(AbiTagState const &) = delete;
+ AbiTagState &operator=(AbiTagState const &) = delete;
+
+ ~AbiTagState() { pop(); }
+
+ void pop() {
+ if (!LinkActive)
+ return;
+
+ assert(LinkHead == this &&
+ "abi tag link head must point to us on destruction");
+ LinkActive = false;
+ if (Parent) {
+ Parent->UsedAbiTags.insert(UsedAbiTags.begin(), UsedAbiTags.end());
+ Parent->EmittedAbiTags.insert(EmittedAbiTags.begin(),
+ EmittedAbiTags.end());
+ }
+ LinkHead = Parent;
+ }
+
+ void write(raw_ostream &Out, const NamedDecl *ND,
+ const AbiTagList *AdditionalAbiTags) {
+ ND = cast<NamedDecl>(ND->getCanonicalDecl());
+
+ if (dyn_cast<FunctionDecl>(ND) || dyn_cast<VarDecl>(ND)) {
+ // assert(AdditionalAbiTags && "function and variables need a list of
+ // additional abi tags");
+ } else {
+ assert(
+ !AdditionalAbiTags &&
+ "only function and variables need a list of additional abi tags");
+ if (const auto *NS = dyn_cast<NamespaceDecl>(ND)) {
+ if (const auto *AbiTag = NS->getAttr<AbiTagAttr>()) {
+ for (const auto &Tag : AbiTag->tags()) {
+ UsedAbiTags.insert(Tag);
+ }
+ }
+ // don't emit abi tags for namespaces
+ return;
+ }
+ }
+
+ AbiTagList TagList;
+ if (const auto *AbiTag = ND->getAttr<AbiTagAttr>()) {
+ for (const auto &Tag : AbiTag->tags()) {
+ UsedAbiTags.insert(Tag);
+ // AbiTag->tags() is sorted and has no duplicates
+ TagList.push_back(Tag);
+ }
+ }
+
+ if (AdditionalAbiTags) {
+ for (const auto &Tag : *AdditionalAbiTags) {
+ UsedAbiTags.insert(Tag);
+ if (std::find(TagList.begin(), TagList.end(), Tag) == TagList.end()) {
+ // don't insert duplicates
+ TagList.push_back(Tag);
+ }
+ }
+ // AbiTag->tags() are already sorted; only add if we had additional tags
+ std::sort(TagList.begin(), TagList.end());
+ }
+
+ writeSortedUniqueAbiTags(Out, TagList);
+ }
+
+ const std::set<StringRef> &getUsedAbiTags() const { return UsedAbiTags; }
+ void setUsedAbiTags(const std::set<StringRef> &AbiTags) {
+ UsedAbiTags = AbiTags;
+ }
+
+ const std::set<StringRef> &getEmittedAbiTags() const {
+ return EmittedAbiTags;
+ }
+
+ private:
+ template <typename TagList>
+ void writeSortedUniqueAbiTags(raw_ostream &Out, TagList const &AbiTags) {
+ for (const auto &Tag : AbiTags) {
+ EmittedAbiTags.insert(Tag);
+ Out << "B";
+ Out << Tag.size();
+ Out << Tag;
+ }
+ }
+ };
+
+ AbiTagState *AbiTags = nullptr;
+ AbiTagState AbiTagsRoot{ AbiTags };
+
llvm::DenseMap<uintptr_t, unsigned> Substitutions;
ASTContext &getASTContext() const { return Context.getASTContext(); }
public:
CXXNameMangler(ItaniumMangleContextImpl &C, raw_ostream &Out_,
- const NamedDecl *D = nullptr)
- : Context(C), Out(Out_), Structor(getStructor(D)), StructorType(0),
- SeqID(0) {
+ const NamedDecl *D = nullptr, bool NullOut_ = false)
+ : Context(C), Out(Out_), NullOut(NullOut_), Structor(getStructor(D)),
+ StructorType(0), SeqID(0) {
// These can't be mangled without a ctor type or dtor type.
assert(!D || (!isa<CXXDestructorDecl>(D) &&
!isa<CXXConstructorDecl>(D)));
@@ -285,6 +448,11 @@
: Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
SeqID(0) { }
+ CXXNameMangler(CXXNameMangler &Outer, llvm::raw_null_ostream &Out_)
+ : Context(Outer.Context), Out(Out_), NullOut(true),
+ Structor(Outer.Structor), StructorType(Outer.StructorType),
+ SeqID(Outer.SeqID) {}
+
#if MANGLE_CHECKER
~CXXNameMangler() {
if (Out.str()[0] == '\01')
@@ -298,14 +466,18 @@
#endif
raw_ostream &getStream() { return Out; }
+ void disableDerivedAbiTags() { DisableDerivedAbiTags = true; }
+ static bool shouldHaveAbiTags(ItaniumMangleContextImpl &C, const VarDecl *VD);
+
void mangle(const NamedDecl *D);
void mangleCallOffset(int64_t NonVirtual, int64_t Virtual);
void mangleNumber(const llvm::APSInt &I);
void mangleNumber(int64_t Number);
void mangleFloat(const llvm::APFloat &F);
- void mangleFunctionEncoding(const FunctionDecl *FD);
+ void mangleFunctionEncoding(const FunctionDecl *FD,
+ bool ExcludeUnqualifiedName = false);
void mangleSeqID(unsigned SeqID);
- void mangleName(const NamedDecl *ND);
+ void mangleName(const NamedDecl *ND, bool ExcludeUnqualifiedName = false);
void mangleType(QualType T);
void mangleNameOrStandardSubstitution(const NamedDecl *ND);
@@ -336,31 +508,53 @@
DeclarationName name,
unsigned KnownArity = UnknownArity);
- void mangleName(const TemplateDecl *TD,
- const TemplateArgument *TemplateArgs,
- unsigned NumTemplateArgs);
- void mangleUnqualifiedName(const NamedDecl *ND) {
- mangleUnqualifiedName(ND, ND->getDeclName(), UnknownArity);
+ void mangleFunctionEncodingBareType(const FunctionDecl *FD);
+
+ void mangleNameWithAbiTags(const NamedDecl *ND,
+ const AbiTagList *AdditionalAbiTags,
+ bool ExcludeUnqualifiedName);
+ void mangleTemplateName(const TemplateDecl *TD,
+ const AbiTagList *AdditionalAbiTags,
+ bool ExcludeUnqualifiedName,
+ const TemplateArgument *TemplateArgs,
+ unsigned NumTemplateArgs);
+ void mangleUnqualifiedName(const NamedDecl *ND,
+ const AbiTagList *AdditionalAbiTags) {
+ mangleUnqualifiedName(ND, ND->getDeclName(), UnknownArity,
+ AdditionalAbiTags);
}
void mangleUnqualifiedName(const NamedDecl *ND, DeclarationName Name,
- unsigned KnownArity);
- void mangleUnscopedName(const NamedDecl *ND);
- void mangleUnscopedTemplateName(const TemplateDecl *ND);
- void mangleUnscopedTemplateName(TemplateName);
+ unsigned KnownArity,
+ const AbiTagList *AdditionalAbiTags);
+ void mangleUnscopedName(const NamedDecl *ND,
+ const AbiTagList *AdditionalAbiTags);
+ void mangleUnscopedTemplateName(const TemplateDecl *ND,
+ const AbiTagList *AdditionalAbiTags);
+ void mangleUnscopedTemplateName(TemplateName,
+ const AbiTagList *AdditionalAbiTags);
void mangleSourceName(const IdentifierInfo *II);
- void mangleLocalName(const Decl *D);
+ void mangleLocalName(const Decl *D,
+ const AbiTagList *AdditionalAbiTags,
+ bool ExcludeUnqualifiedName);
void mangleBlockForPrefix(const BlockDecl *Block);
void mangleUnqualifiedBlock(const BlockDecl *Block);
void mangleLambda(const CXXRecordDecl *Lambda);
void mangleNestedName(const NamedDecl *ND, const DeclContext *DC,
- bool NoFunction=false);
+ const AbiTagList *AdditionalAbiTags,
+ bool NoFunction,
+ bool ExcludeUnqualifiedName);
void mangleNestedName(const TemplateDecl *TD,
+ const AbiTagList *AdditionalAbiTags,
+ bool ExcludeUnqualifiedName,
const TemplateArgument *TemplateArgs,
unsigned NumTemplateArgs);
void manglePrefix(NestedNameSpecifier *qualifier);
void manglePrefix(const DeclContext *DC, bool NoFunction=false);
void manglePrefix(QualType type);
- void mangleTemplatePrefix(const TemplateDecl *ND, bool NoFunction=false);
+ void mangleTemplatePrefix(const TemplateDecl *ND,
+ const AbiTagList *AdditionalAbiTags,
+ bool NoFunction = false,
+ bool ExcludeUnqualifiedName = false);
void mangleTemplatePrefix(TemplateName Template);
bool mangleUnresolvedTypeOrSimpleId(QualType DestroyedType,
StringRef Prefix = "");
@@ -411,6 +605,15 @@
void mangleTemplateParameter(unsigned Index);
void mangleFunctionParam(const ParmVarDecl *parm);
+
+ void writeAbiTags(const NamedDecl *ND,
+ const AbiTagList *AdditionalAbiTags = nullptr);
+
+ std::set<StringRef>
+ getTagsFromPrefixAndTemplateArguments(const NamedDecl *ND);
+
+ AbiTagList makeAdditionalTagsForFunction(const FunctionDecl *FD);
+ AbiTagList makeAdditionalTagsForVariable(const VarDecl *VD);
};
}
@@ -454,13 +657,22 @@
while (!DC->isNamespace() && !DC->isTranslationUnit())
DC = getEffectiveParentContext(DC);
if (DC->isTranslationUnit() && D->getFormalLinkage() != InternalLinkage &&
+ !CXXNameMangler::shouldHaveAbiTags(*this, VD) &&
!isa<VarTemplateSpecializationDecl>(D))
return false;
}
return true;
}
+void CXXNameMangler::writeAbiTags(const NamedDecl *ND,
+ const AbiTagList *AdditionalAbiTags) {
+ assert(AbiTags && "require AbiTagState");
+ if (AbiTags)
+ AbiTags->write(Out, ND,
+ DisableDerivedAbiTags ? nullptr : AdditionalAbiTags);
+}
+
void CXXNameMangler::mangle(const NamedDecl *D) {
// <mangled-name> ::= _Z <encoding>
// ::= <data name>
@@ -476,14 +688,31 @@
mangleName(cast<FieldDecl>(D));
}
-void CXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD) {
- // <encoding> ::= <function name> <bare-function-type>
- mangleName(FD);
-
+void CXXNameMangler::mangleFunctionEncoding(const FunctionDecl *FD,
+ bool ExcludeUnqualifiedName) {
// Don't mangle in the type if this isn't a decl we should typically mangle.
- if (!Context.shouldMangleDeclName(FD))
+ if (!Context.shouldMangleDeclName(FD)) {
+ mangleNameWithAbiTags(FD, /* AdditionalAbiTags */ nullptr,
+ ExcludeUnqualifiedName);
return;
+ }
+
+ // <encoding> ::= <function name> <bare-function-type>
+ if (ExcludeUnqualifiedName) {
+ // running makeAdditionalTagsForFunction would loop, don't need it here
+ // anyway
+ mangleNameWithAbiTags(FD, /* AdditionalAbiTags */ nullptr,
+ ExcludeUnqualifiedName);
+ } else {
+ AbiTagList AdditionalAbiTags = makeAdditionalTagsForFunction(FD);
+ mangleNameWithAbiTags(FD, &AdditionalAbiTags, ExcludeUnqualifiedName);
+ }
+
+ mangleFunctionEncodingBareType(FD);
+}
+
+void CXXNameMangler::mangleFunctionEncodingBareType(const FunctionDecl *FD) {
if (FD->hasAttr<EnableIfAttr>()) {
FunctionTypeDepthState Saved = FunctionTypeDepth.push();
Out << "Ua9enable_ifI";
@@ -587,7 +816,24 @@
return nullptr;
}
-void CXXNameMangler::mangleName(const NamedDecl *ND) {
+// Must not be run from mangleLocalName for the <entity name> as it would loop
+// otherwise.
+void CXXNameMangler::mangleName(const NamedDecl *ND,
+ bool ExcludeUnqualifiedName) {
+ if (!ExcludeUnqualifiedName) {
+ if (const VarDecl *VD = dyn_cast<VarDecl>(ND)) {
+ AbiTagList VariableAdditionalAbiTags = makeAdditionalTagsForVariable(VD);
+ mangleNameWithAbiTags(VD, &VariableAdditionalAbiTags,
+ ExcludeUnqualifiedName);
+ return;
+ }
+ }
+ mangleNameWithAbiTags(ND, nullptr, ExcludeUnqualifiedName);
+}
+
+void CXXNameMangler::mangleNameWithAbiTags(const NamedDecl *ND,
+ const AbiTagList *AdditionalAbiTags,
+ bool ExcludeUnqualifiedName) {
// <name> ::= <nested-name>
// ::= <unscoped-name>
// ::= <unscoped-template-name> <template-args>
@@ -603,7 +849,7 @@
while (!DC->isNamespace() && !DC->isTranslationUnit())
DC = getEffectiveParentContext(DC);
else if (GetLocalClassDecl(ND)) {
- mangleLocalName(ND);
+ mangleLocalName(ND, AdditionalAbiTags, ExcludeUnqualifiedName);
return;
}
@@ -613,76 +859,93 @@
// Check if we have a template.
const TemplateArgumentList *TemplateArgs = nullptr;
if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
- mangleUnscopedTemplateName(TD);
+ if (!ExcludeUnqualifiedName)
+ mangleUnscopedTemplateName(TD, AdditionalAbiTags);
mangleTemplateArgs(*TemplateArgs);
return;
}
- mangleUnscopedName(ND);
+ if (!ExcludeUnqualifiedName)
+ mangleUnscopedName(ND, AdditionalAbiTags);
return;
}
if (isLocalContainerContext(DC)) {
- mangleLocalName(ND);
+ mangleLocalName(ND, AdditionalAbiTags, ExcludeUnqualifiedName);
return;
}
- mangleNestedName(ND, DC);
+ mangleNestedName(ND, DC, AdditionalAbiTags, /* NoFunction */ false,
+ ExcludeUnqualifiedName);
}
-void CXXNameMangler::mangleName(const TemplateDecl *TD,
- const TemplateArgument *TemplateArgs,
- unsigned NumTemplateArgs) {
+
+void CXXNameMangler::mangleTemplateName(const TemplateDecl *TD,
+ const AbiTagList *AdditionalAbiTags,
+ bool ExcludeUnqualifiedName,
+ const TemplateArgument *TemplateArgs,
+ unsigned NumTemplateArgs) {
const DeclContext *DC = IgnoreLinkageSpecDecls(getEffectiveDeclContext(TD));
if (DC->isTranslationUnit() || isStdNamespace(DC)) {
- mangleUnscopedTemplateName(TD);
+ if (!ExcludeUnqualifiedName)
+ mangleUnscopedTemplateName(TD, AdditionalAbiTags);
mangleTemplateArgs(TemplateArgs, NumTemplateArgs);
} else {
- mangleNestedName(TD, TemplateArgs, NumTemplateArgs);
+ mangleNestedName(TD, AdditionalAbiTags, ExcludeUnqualifiedName,
+ TemplateArgs, NumTemplateArgs);
}
}
-void CXXNameMangler::mangleUnscopedName(const NamedDecl *ND) {
+void CXXNameMangler::mangleUnscopedName(const NamedDecl *ND,
+ const AbiTagList *AdditionalAbiTags) {
// <unscoped-name> ::= <unqualified-name>
// ::= St <unqualified-name> # ::std::
if (isStdNamespace(IgnoreLinkageSpecDecls(getEffectiveDeclContext(ND))))
Out << "St";
- mangleUnqualifiedName(ND);
+ mangleUnqualifiedName(ND, AdditionalAbiTags);
}
-void CXXNameMangler::mangleUnscopedTemplateName(const TemplateDecl *ND) {
+void CXXNameMangler::mangleUnscopedTemplateName(
+ const TemplateDecl *ND, const AbiTagList *AdditionalAbiTags) {
// <unscoped-template-name> ::= <unscoped-name>
// ::= <substitution>
if (mangleSubstitution(ND))
return;
// <template-template-param> ::= <template-param>
- if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(ND))
+ if (const auto *TTP = dyn_cast<TemplateTemplateParmDecl>(ND)) {
+ assert(!AdditionalAbiTags &&
+ "template template param cannot have abi tags");
mangleTemplateParameter(TTP->getIndex());
- else
- mangleUnscopedName(ND->getTemplatedDecl());
+ } else {
+ mangleUnscopedName(ND->getTemplatedDecl(), AdditionalAbiTags);
+ }
addSubstitution(ND);
}
-void CXXNameMangler::mangleUnscopedTemplateName(TemplateName Template) {
+void CXXNameMangler::mangleUnscopedTemplateName(
+ TemplateName Template, const AbiTagList *AdditionalAbiTags) {
// <unscoped-template-name> ::= <unscoped-name>
// ::= <substitution>
if (TemplateDecl *TD = Template.getAsTemplateDecl())
- return mangleUnscopedTemplateName(TD);
+ return mangleUnscopedTemplateName(TD, AdditionalAbiTags);
if (mangleSubstitution(Template))
return;
+ assert(!AdditionalAbiTags &&
+ "dependent template name cannot have abi tags");
+
DependentTemplateName *Dependent = Template.getAsDependentTemplateName();
assert(Dependent && "Not a dependent template name?");
if (const IdentifierInfo *Id = Dependent->getIdentifier())
mangleSourceName(Id);
else
mangleOperatorName(Dependent->getOperator(), UnknownArity);
-
+
addSubstitution(Template);
}
@@ -841,14 +1104,16 @@
else
Out << "sr";
mangleSourceName(qualifier->getAsNamespace()->getIdentifier());
+ writeAbiTags(qualifier->getAsNamespace());
break;
case NestedNameSpecifier::NamespaceAlias:
if (qualifier->getPrefix())
mangleUnresolvedPrefix(qualifier->getPrefix(),
/*recursive*/ true);
else
Out << "sr";
mangleSourceName(qualifier->getAsNamespaceAlias()->getIdentifier());
+ writeAbiTags(qualifier->getAsNamespaceAlias());
break;
case NestedNameSpecifier::TypeSpec:
@@ -883,6 +1148,7 @@
Out << "sr";
mangleSourceName(qualifier->getAsIdentifier());
+ // an Identifier has no type information, so we can't emit abi tags for it
break;
}
@@ -928,7 +1194,8 @@
void CXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
DeclarationName Name,
- unsigned KnownArity) {
+ unsigned KnownArity,
+ const AbiTagList *AdditionalAbiTags) {
unsigned Arity = KnownArity;
// <unqualified-name> ::= <operator-name>
// ::= <ctor-dtor-name>
@@ -947,6 +1214,7 @@
Out << 'L';
mangleSourceName(II);
+ writeAbiTags(ND, AdditionalAbiTags);
break;
}
@@ -986,6 +1254,7 @@
assert(FD->getIdentifier() && "Data member name isn't an identifier!");
mangleSourceName(FD->getIdentifier());
+ // Not emitting abi tags: internal name anyway
break;
}
@@ -1006,6 +1275,10 @@
assert(D->getDeclName().getAsIdentifierInfo() &&
"Typedef was not named!");
mangleSourceName(D->getDeclName().getAsIdentifierInfo());
+ assert(!AdditionalAbiTags && "Type cannot have additional abi tags");
+ // explicit abi tags are still possible; take from underlying type, not
+ // from typedef.
+ writeAbiTags(TD, nullptr);
break;
}
@@ -1015,6 +1288,8 @@
// <lambda-sig> ::= <parameter-type>+ # Parameter types or 'v' for 'void'.
if (const CXXRecordDecl *Record = dyn_cast<CXXRecordDecl>(TD)) {
if (Record->isLambda() && Record->getLambdaManglingNumber()) {
+ assert(!AdditionalAbiTags &&
+ "Lambda type cannot have additional abi tags");
mangleLambda(Record);
break;
}
@@ -1026,11 +1301,13 @@
if (UnnamedMangle > 1)
Out << UnnamedMangle - 2;
Out << '_';
+ writeAbiTags(TD, AdditionalAbiTags);
break;
}
- // Get a unique id for the anonymous struct.
- unsigned AnonStructId = Context.getAnonymousStructId(TD);
+ // Get a unique id for the anonymous struct. If it is not a real output
+ // ID doesn't matter so use fake one.
+ unsigned AnonStructId = NullOut ? 0 : Context.getAnonymousStructId(TD);
// Mangle it as a source name in the form
// [n] $_<id>
@@ -1058,6 +1335,7 @@
// Otherwise, use the complete constructor name. This is relevant if a
// class with a constructor is declared within a constructor.
mangleCXXCtorType(Ctor_Complete);
+ writeAbiTags(ND, AdditionalAbiTags);
break;
case DeclarationName::CXXDestructorName:
@@ -1069,6 +1347,7 @@
// Otherwise, use the complete destructor name. This is relevant if a
// class with a destructor is declared within a destructor.
mangleCXXDtorType(Dtor_Complete);
+ writeAbiTags(ND, AdditionalAbiTags);
break;
case DeclarationName::CXXOperatorName:
@@ -1084,6 +1363,7 @@
case DeclarationName::CXXConversionFunctionName:
case DeclarationName::CXXLiteralOperatorName:
mangleOperatorName(Name, Arity);
+ writeAbiTags(ND, AdditionalAbiTags);
break;
case DeclarationName::CXXUsingDirective:
@@ -1100,7 +1380,9 @@
void CXXNameMangler::mangleNestedName(const NamedDecl *ND,
const DeclContext *DC,
- bool NoFunction) {
+ const AbiTagList *AdditionalAbiTags,
+ bool NoFunction,
+ bool ExcludeUnqualifiedName) {
// <nested-name>
// ::= N [<CV-qualifiers>] [<ref-qualifier>] <prefix> <unqualified-name> E
// ::= N [<CV-qualifiers>] [<ref-qualifier>] <template-prefix>
@@ -1120,30 +1402,36 @@
// Check if we have a template.
const TemplateArgumentList *TemplateArgs = nullptr;
if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
- mangleTemplatePrefix(TD, NoFunction);
+ mangleTemplatePrefix(TD, AdditionalAbiTags, NoFunction,
+ ExcludeUnqualifiedName);
mangleTemplateArgs(*TemplateArgs);
}
else {
manglePrefix(DC, NoFunction);
- mangleUnqualifiedName(ND);
+ if (!ExcludeUnqualifiedName)
+ mangleUnqualifiedName(ND, AdditionalAbiTags);
}
Out << 'E';
}
void CXXNameMangler::mangleNestedName(const TemplateDecl *TD,
+ const AbiTagList *AdditionalAbiTags,
+ bool ExcludeUnqualifiedName,
const TemplateArgument *TemplateArgs,
unsigned NumTemplateArgs) {
// <nested-name> ::= N [<CV-qualifiers>] <template-prefix> <template-args> E
Out << 'N';
- mangleTemplatePrefix(TD);
+ mangleTemplatePrefix(TD, AdditionalAbiTags, ExcludeUnqualifiedName);
mangleTemplateArgs(TemplateArgs, NumTemplateArgs);
Out << 'E';
}
-void CXXNameMangler::mangleLocalName(const Decl *D) {
+void CXXNameMangler::mangleLocalName(const Decl *D,
+ const AbiTagList *AdditionalAbiTags,
+ bool ExcludeUnqualifiedName) {
// <local-name> := Z <function encoding> E <entity name> [<discriminator>]
// := Z <function encoding> E s [<discriminator>]
// <local-name> := Z <function encoding> E d [ <parameter number> ]
@@ -1155,15 +1443,26 @@
Out << 'Z';
- if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC))
- mangleObjCMethodName(MD);
- else if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC))
- mangleBlockForPrefix(BD);
- else
- mangleFunctionEncoding(cast<FunctionDecl>(DC));
+ {
+ AbiTagState localAbiTags(AbiTags);
+
+ if (const ObjCMethodDecl *MD = dyn_cast<ObjCMethodDecl>(DC))
+ mangleObjCMethodName(MD);
+ else if (const BlockDecl *BD = dyn_cast<BlockDecl>(DC))
+ mangleBlockForPrefix(BD);
+ else
+ mangleFunctionEncoding(cast<FunctionDecl>(DC));
+
+ // Implicit ABI tags (from namespace) are not available in the following
+ // entity; reset to actually emitted tags, which are available.
+ localAbiTags.setUsedAbiTags(localAbiTags.getEmittedAbiTags());
+ }
Out << 'E';
+ // GCC 5.3.0 doesn't emit derived abi tags for but that seems to be a bug
+ // that is fixed in trunk.
+
if (RD) {
// The parameter number is omitted for the last parameter, 0 for the
// second-to-last parameter, 1 for the third-to-last parameter, etc. The
@@ -1188,13 +1487,17 @@
// Mangle the name relative to the closest enclosing function.
// equality ok because RD derived from ND above
if (D == RD) {
- mangleUnqualifiedName(RD);
+ if (!ExcludeUnqualifiedName)
+ mangleUnqualifiedName(RD, AdditionalAbiTags);
} else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
manglePrefix(getEffectiveDeclContext(BD), true /*NoFunction*/);
- mangleUnqualifiedBlock(BD);
+ assert(!AdditionalAbiTags && "Block cannot have additional abi tags");
+ if (!ExcludeUnqualifiedName)
+ mangleUnqualifiedBlock(BD);
} else {
const NamedDecl *ND = cast<NamedDecl>(D);
- mangleNestedName(ND, getEffectiveDeclContext(ND), true /*NoFunction*/);
+ mangleNestedName(ND, getEffectiveDeclContext(ND), AdditionalAbiTags,
+ true /*NoFunction*/, ExcludeUnqualifiedName);
}
} else if (const BlockDecl *BD = dyn_cast<BlockDecl>(D)) {
// Mangle a block in a default parameter; see above explanation for
@@ -1211,30 +1514,37 @@
}
}
- mangleUnqualifiedBlock(BD);
+ assert(!AdditionalAbiTags && "Block cannot have additional abi tags");
+ if (!ExcludeUnqualifiedName)
+ mangleUnqualifiedBlock(BD);
} else {
- mangleUnqualifiedName(cast<NamedDecl>(D));
- }
-
- if (const NamedDecl *ND = dyn_cast<NamedDecl>(RD ? RD : D)) {
- unsigned disc;
- if (Context.getNextDiscriminator(ND, disc)) {
- if (disc < 10)
- Out << '_' << disc;
- else
- Out << "__" << disc << '_';
+ if (!ExcludeUnqualifiedName)
+ mangleUnqualifiedName(cast<NamedDecl>(D), AdditionalAbiTags);
+ }
+
+ if (!ExcludeUnqualifiedName) {
+ if (const NamedDecl *ND = dyn_cast<NamedDecl>(RD ? RD : D)) {
+ unsigned disc;
+ if (Context.getNextDiscriminator(ND, disc)) {
+ if (disc < 10)
+ Out << '_' << disc;
+ else
+ Out << "__" << disc << '_';
+ }
}
}
}
void CXXNameMangler::mangleBlockForPrefix(const BlockDecl *Block) {
if (GetLocalClassDecl(Block)) {
- mangleLocalName(Block);
+ mangleLocalName(Block, /* AdditionalAbiTags */ nullptr,
+ /* ExcludeUnqualifiedName */ false);
return;
}
const DeclContext *DC = getEffectiveDeclContext(Block);
if (isLocalContainerContext(DC)) {
- mangleLocalName(Block);
+ mangleLocalName(Block, /* AdditionalAbiTags */ nullptr,
+ /* ExcludeUnqualifiedName */ false);
return;
}
manglePrefix(getEffectiveDeclContext(Block));
@@ -1245,10 +1555,11 @@
if (Decl *Context = Block->getBlockManglingContextDecl()) {
if ((isa<VarDecl>(Context) || isa<FieldDecl>(Context)) &&
Context->getDeclContext()->isRecord()) {
- if (const IdentifierInfo *Name
- = cast<NamedDecl>(Context)->getIdentifier()) {
+ const auto *ND = cast<NamedDecl>(Context);
+ if (const IdentifierInfo *Name = ND->getIdentifier()) {
mangleSourceName(Name);
- Out << 'M';
+ writeAbiTags(ND, /* AdditionalAbiTags */ nullptr);
+ Out << 'M';
}
}
}
@@ -1281,7 +1592,7 @@
if (const IdentifierInfo *Name
= cast<NamedDecl>(Context)->getIdentifier()) {
mangleSourceName(Name);
- Out << 'M';
+ Out << 'M';
}
}
}
@@ -1364,11 +1675,11 @@
// Check if we have a template.
const TemplateArgumentList *TemplateArgs = nullptr;
if (const TemplateDecl *TD = isTemplate(ND, TemplateArgs)) {
- mangleTemplatePrefix(TD);
+ mangleTemplatePrefix(TD, /* AdditionalAbiTags */ nullptr);
mangleTemplateArgs(*TemplateArgs);
} else {
manglePrefix(getEffectiveDeclContext(ND), NoFunction);
- mangleUnqualifiedName(ND);
+ mangleUnqualifiedName(ND, /* AdditionalAbiTags */ nullptr);
}
addSubstitution(ND);
@@ -1379,27 +1690,30 @@
// ::= <template-param>
// ::= <substitution>
if (TemplateDecl *TD = Template.getAsTemplateDecl())
- return mangleTemplatePrefix(TD);
+ return mangleTemplatePrefix(TD, /* AdditionalAbiTags */ nullptr);
if (QualifiedTemplateName *Qualified = Template.getAsQualifiedTemplateName())
manglePrefix(Qualified->getQualifier());
-
+
if (OverloadedTemplateStorage *Overloaded
= Template.getAsOverloadedTemplate()) {
mangleUnqualifiedName(nullptr, (*Overloaded->begin())->getDeclName(),
- UnknownArity);
+ UnknownArity,
+ /* AdditionalAbiTags */ nullptr);
return;
}
-
+
DependentTemplateName *Dependent = Template.getAsDependentTemplateName();
assert(Dependent && "Unknown template name kind?");
if (NestedNameSpecifier *Qualifier = Dependent->getQualifier())
manglePrefix(Qualifier);
- mangleUnscopedTemplateName(Template);
+ mangleUnscopedTemplateName(Template, /* AdditionalAbiTags */ nullptr);
}
void CXXNameMangler::mangleTemplatePrefix(const TemplateDecl *ND,
- bool NoFunction) {
+ const AbiTagList *AdditionalAbiTags,
+ bool NoFunction,
+ bool ExcludeUnqualifiedName) {
// <template-prefix> ::= <prefix> <template unqualified-name>
// ::= <template-param>
// ::= <substitution>
@@ -1414,7 +1728,8 @@
mangleTemplateParameter(TTP->getIndex());
} else {
manglePrefix(getEffectiveDeclContext(ND), NoFunction);
- mangleUnqualifiedName(ND->getTemplatedDecl());
+ if (!ExcludeUnqualifiedName)
+ mangleUnqualifiedName(ND->getTemplatedDecl(), AdditionalAbiTags);
}
addSubstitution(ND);
@@ -1458,6 +1773,7 @@
// <name> ::= <nested-name>
mangleUnresolvedPrefix(Dependent->getQualifier());
mangleSourceName(Dependent->getIdentifier());
+ // writeAbiTags(Dependent);
break;
}
@@ -1550,16 +1866,19 @@
case Type::Typedef:
mangleSourceName(cast<TypedefType>(Ty)->getDecl()->getIdentifier());
+ writeAbiTags(cast<TypedefType>(Ty)->getDecl());
break;
case Type::UnresolvedUsing:
mangleSourceName(
cast<UnresolvedUsingType>(Ty)->getDecl()->getIdentifier());
+ writeAbiTags(cast<UnresolvedUsingType>(Ty)->getDecl());
break;
case Type::Enum:
case Type::Record:
mangleSourceName(cast<TagType>(Ty)->getDecl()->getIdentifier());
+ writeAbiTags(cast<TagType>(Ty)->getDecl());
break;
case Type::TemplateSpecialization: {
@@ -1578,6 +1897,7 @@
goto unresolvedType;
mangleSourceName(TD->getIdentifier());
+ writeAbiTags(TD);
break;
}
@@ -1609,16 +1929,19 @@
case Type::InjectedClassName:
mangleSourceName(
cast<InjectedClassNameType>(Ty)->getDecl()->getIdentifier());
+ writeAbiTags(cast<InjectedClassNameType>(Ty)->getDecl());
break;
case Type::DependentName:
mangleSourceName(cast<DependentNameType>(Ty)->getIdentifier());
+ // writeAbiTags(cast<DependentNameType>(Ty));
break;
case Type::DependentTemplateSpecialization: {
const DependentTemplateSpecializationType *DTST =
cast<DependentTemplateSpecializationType>(Ty);
mangleSourceName(DTST->getIdentifier());
+ // writeAbiTags(DTST);
mangleTemplateArgs(DTST->getArgs(), DTST->getNumArgs());
break;
}
@@ -2081,7 +2404,9 @@
case BuiltinType::Id:
#include "clang/AST/BuiltinTypes.def"
case BuiltinType::Dependent:
- llvm_unreachable("mangling a placeholder type");
+ if (!NullOut)
+ llvm_unreachable("mangling a placeholder type");
+ break;
case BuiltinType::ObjCId:
Out << "11objc_object";
break;
@@ -2641,7 +2966,11 @@
void CXXNameMangler::mangleType(const TemplateSpecializationType *T) {
if (TemplateDecl *TD = T->getTemplateName().getAsTemplateDecl()) {
- mangleName(TD, T->getArgs(), T->getNumArgs());
+ // types only have explicit abi tags, no addition tags
+ mangleTemplateName(TD,
+ /* AdditionalAbiTags */ nullptr,
+ /* ExcludeUnqualifiedName */ false,
+ T->getArgs(), T->getNumArgs());
} else {
if (mangleSubstitution(QualType(T, 0)))
return;
@@ -2967,12 +3296,14 @@
case Expr::PseudoObjectExprClass:
case Expr::AtomicExprClass:
{
- // As bad as this diagnostic is, it's better than crashing.
- DiagnosticsEngine &Diags = Context.getDiags();
- unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
- "cannot yet mangle expression type %0");
- Diags.Report(E->getExprLoc(), DiagID)
- << E->getStmtClassName() << E->getSourceRange();
+ if (!NullOut) {
+ // As bad as this diagnostic is, it's better than crashing.
+ DiagnosticsEngine &Diags = Context.getDiags();
+ unsigned DiagID = Diags.getCustomDiagID(DiagnosticsEngine::Error,
+ "cannot yet mangle expression type %0");
+ Diags.Report(E->getExprLoc(), DiagID)
+ << E->getStmtClassName() << E->getSourceRange();
+ }
break;
}
@@ -4115,6 +4446,97 @@
Substitutions[Ptr] = SeqID++;
}
+std::set<StringRef>
+CXXNameMangler::getTagsFromPrefixAndTemplateArguments(const NamedDecl *ND) {
+ llvm::raw_null_ostream NullOutStream;
+ CXXNameMangler TrackPrefixAndTemplateArguments(*this, NullOutStream);
+
+ if (const FunctionDecl *FD = dyn_cast<FunctionDecl>(ND)) {
+ TrackPrefixAndTemplateArguments.mangleFunctionEncoding(
+ FD, /* ExcludeUnqualifiedName */ true);
+ } else {
+ TrackPrefixAndTemplateArguments.mangleName(
+ ND, /* ExcludeUnqualifiedName */ true);
+ }
+
+ return std::move(
+ TrackPrefixAndTemplateArguments.AbiTagsRoot.getUsedAbiTags());
+}
+
+CXXNameMangler::AbiTagList
+CXXNameMangler::makeAdditionalTagsForFunction(const FunctionDecl *FD) {
+ // when derived abi tags are disabled there is no need to make any list
+ if (DisableDerivedAbiTags)
+ return AbiTagList();
+
+ std::set<StringRef> ImplicitlyAvailableTags =
+ getTagsFromPrefixAndTemplateArguments(FD);
+ std::set<StringRef> ReturnTypeTags;
+
+ {
+ llvm::raw_null_ostream NullOutStream;
+ CXXNameMangler TrackReturnTypeTags(*this, NullOutStream);
+ TrackReturnTypeTags.disableDerivedAbiTags();
+
+ const FunctionProtoType *Proto =
+ cast<FunctionProtoType>(FD->getType()->getAs<FunctionType>());
+ TrackReturnTypeTags.FunctionTypeDepth.enterResultType();
+ TrackReturnTypeTags.mangleType(Proto->getReturnType());
+ TrackReturnTypeTags.FunctionTypeDepth.leaveResultType();
+
+ ReturnTypeTags =
+ std::move(TrackReturnTypeTags.AbiTagsRoot.getUsedAbiTags());
+ }
+
+ AbiTagList AdditionalAbiTags;
+
+ for (const auto &Tag : ReturnTypeTags) {
+ if (ImplicitlyAvailableTags.count(Tag) == 0)
+ AdditionalAbiTags.push_back(Tag);
+ }
+
+ return AdditionalAbiTags;
+}
+
+CXXNameMangler::AbiTagList
+CXXNameMangler::makeAdditionalTagsForVariable(const VarDecl *VD) {
+ // when derived abi tags are disabled there is no need to make any list
+ if (DisableDerivedAbiTags)
+ return AbiTagList();
+
+ std::set<StringRef> ImplicitlyAvailableTags =
+ getTagsFromPrefixAndTemplateArguments(VD);
+ std::set<StringRef> VariableTypeTags;
+
+ {
+ llvm::raw_null_ostream NullOutStream;
+ CXXNameMangler TrackVariableType(*this, NullOutStream);
+ TrackVariableType.disableDerivedAbiTags();
+
+ TrackVariableType.mangleType(VD->getType());
+
+ VariableTypeTags =
+ std::move(TrackVariableType.AbiTagsRoot.getUsedAbiTags());
+ }
+
+ AbiTagList AdditionalAbiTags;
+
+ for (const auto &Tag : VariableTypeTags) {
+ if (ImplicitlyAvailableTags.count(Tag) == 0)
+ AdditionalAbiTags.push_back(Tag);
+ }
+
+ return AdditionalAbiTags;
+}
+
+bool CXXNameMangler::shouldHaveAbiTags(ItaniumMangleContextImpl &C,
+ const VarDecl *VD) {
+ llvm::raw_null_ostream NullOutStream;
+ CXXNameMangler TrackAbiTags(C, NullOutStream, nullptr, true);
+ TrackAbiTags.mangle(VD);
+ return TrackAbiTags.AbiTagsRoot.getUsedAbiTags().size();
+}
+
//
/// Mangles the name of the declaration D and emits that name to the given
@@ -4216,6 +4638,8 @@
// <special-name> ::= GV <object name> # Guard variable for one-time
// # initialization
CXXNameMangler Mangler(*this, Out);
+ // GCC 5.3.0 doesn't emit derived abi tags for but that seems to be a bug
+ // that is fixed in trunk.
Mangler.getStream() << "_ZGV";
Mangler.mangleName(D);
}
Index: include/clang/Basic/AttrDocs.td
===================================================================
--- include/clang/Basic/AttrDocs.td
+++ include/clang/Basic/AttrDocs.td
@@ -2160,6 +2160,9 @@
}
def AbiTagsDocs : Documentation {
+ // It it not function only attribute but creating special creating special
+ // category for this abi_tag attribute only seems overkill, eh.
+ let Category = DocCatFunction;
let Content = [{
The ``abi_tag`` attribute can be applied to a function, variable, class or
inline namespace declaration to modify the mangled name of the entity. It gives
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