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-rw-r--r--lib/AST/ItaniumMangle.cpp558
1 files changed, 450 insertions, 108 deletions
diff --git a/lib/AST/ItaniumMangle.cpp b/lib/AST/ItaniumMangle.cpp
index 939ca7a924aa..c460929c461d 100644
--- a/lib/AST/ItaniumMangle.cpp
+++ b/lib/AST/ItaniumMangle.cpp
@@ -21,6 +21,7 @@
#include "clang/AST/DeclObjC.h"
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/ExprCXX.h"
+#include "clang/AST/TypeLoc.h"
#include "clang/Basic/ABI.h"
#include "clang/Basic/SourceManager.h"
#include "clang/Basic/TargetInfo.h"
@@ -50,18 +51,16 @@ static const CXXRecordDecl *GetLocalClassDecl(const NamedDecl *ND) {
return 0;
}
-static const CXXMethodDecl *getStructor(const CXXMethodDecl *MD) {
- assert((isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)) &&
- "Passed in decl is not a ctor or dtor!");
+static const FunctionDecl *getStructor(const FunctionDecl *fn) {
+ if (const FunctionTemplateDecl *ftd = fn->getPrimaryTemplate())
+ return ftd->getTemplatedDecl();
- if (const TemplateDecl *TD = MD->getPrimaryTemplate()) {
- MD = cast<CXXMethodDecl>(TD->getTemplatedDecl());
-
- assert((isa<CXXConstructorDecl>(MD) || isa<CXXDestructorDecl>(MD)) &&
- "Templated decl is not a ctor or dtor!");
- }
+ return fn;
+}
- return MD;
+static const NamedDecl *getStructor(const NamedDecl *decl) {
+ const FunctionDecl *fn = dyn_cast_or_null<FunctionDecl>(decl);
+ return (fn ? getStructor(fn) : decl);
}
static const unsigned UnknownArity = ~0U;
@@ -138,27 +137,75 @@ class CXXNameMangler {
ItaniumMangleContext &Context;
llvm::raw_ostream &Out;
- const CXXMethodDecl *Structor;
+ /// The "structor" is the top-level declaration being mangled, if
+ /// that's not a template specialization; otherwise it's the pattern
+ /// for that specialization.
+ const NamedDecl *Structor;
unsigned StructorType;
/// SeqID - The next subsitution sequence number.
unsigned SeqID;
+ class FunctionTypeDepthState {
+ unsigned Bits;
+
+ enum { InResultTypeMask = 1 };
+
+ public:
+ FunctionTypeDepthState() : Bits(0) {}
+
+ /// The number of function types we're inside.
+ unsigned getDepth() const {
+ return Bits >> 1;
+ }
+
+ /// True if we're in the return type of the innermost function type.
+ bool isInResultType() const {
+ return Bits & InResultTypeMask;
+ }
+
+ FunctionTypeDepthState push() {
+ FunctionTypeDepthState tmp = *this;
+ Bits = (Bits & ~InResultTypeMask) + 2;
+ return tmp;
+ }
+
+ void enterResultType() {
+ Bits |= InResultTypeMask;
+ }
+
+ void leaveResultType() {
+ Bits &= ~InResultTypeMask;
+ }
+
+ void pop(FunctionTypeDepthState saved) {
+ assert(getDepth() == saved.getDepth() + 1);
+ Bits = saved.Bits;
+ }
+
+ } FunctionTypeDepth;
+
llvm::DenseMap<uintptr_t, unsigned> Substitutions;
ASTContext &getASTContext() const { return Context.getASTContext(); }
public:
- CXXNameMangler(ItaniumMangleContext &C, llvm::raw_ostream &Out_)
- : Context(C), Out(Out_), Structor(0), StructorType(0), SeqID(0) { }
+ CXXNameMangler(ItaniumMangleContext &C, llvm::raw_ostream &Out_,
+ const NamedDecl *D = 0)
+ : Context(C), Out(Out_), 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)));
+ }
CXXNameMangler(ItaniumMangleContext &C, llvm::raw_ostream &Out_,
const CXXConstructorDecl *D, CXXCtorType Type)
: Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
- SeqID(0) { }
+ SeqID(0) { }
CXXNameMangler(ItaniumMangleContext &C, llvm::raw_ostream &Out_,
const CXXDestructorDecl *D, CXXDtorType Type)
: Context(C), Out(Out_), Structor(getStructor(D)), StructorType(Type),
- SeqID(0) { }
+ SeqID(0) { }
#if MANGLE_CHECKER
~CXXNameMangler() {
@@ -200,11 +247,16 @@ private:
void addSubstitution(TemplateName Template);
void addSubstitution(uintptr_t Ptr);
- void mangleUnresolvedScope(NestedNameSpecifier *Qualifier);
- void mangleUnresolvedName(NestedNameSpecifier *Qualifier,
- DeclarationName Name,
+ void mangleUnresolvedPrefix(NestedNameSpecifier *qualifier,
+ NamedDecl *firstQualifierLookup,
+ bool recursive = false);
+ void mangleUnresolvedName(NestedNameSpecifier *qualifier,
+ NamedDecl *firstQualifierLookup,
+ DeclarationName name,
unsigned KnownArity = UnknownArity);
+ void mangleUnresolvedType(QualType type);
+
void mangleName(const TemplateDecl *TD,
const TemplateArgument *TemplateArgs,
unsigned NumTemplateArgs);
@@ -223,6 +275,7 @@ private:
void mangleNestedName(const TemplateDecl *TD,
const TemplateArgument *TemplateArgs,
unsigned NumTemplateArgs);
+ void manglePrefix(NestedNameSpecifier *qualifier);
void manglePrefix(const DeclContext *DC, bool NoFunction=false);
void mangleTemplatePrefix(const TemplateDecl *ND);
void mangleTemplatePrefix(TemplateName Template);
@@ -245,10 +298,11 @@ private:
void mangleNeonVectorType(const VectorType *T);
void mangleIntegerLiteral(QualType T, const llvm::APSInt &Value);
- void mangleMemberExpr(const Expr *Base, bool IsArrow,
- NestedNameSpecifier *Qualifier,
- DeclarationName Name,
- unsigned KnownArity);
+ void mangleMemberExpr(const Expr *base, bool isArrow,
+ NestedNameSpecifier *qualifier,
+ NamedDecl *firstQualifierLookup,
+ DeclarationName name,
+ unsigned knownArity);
void mangleExpression(const Expr *E, unsigned Arity = UnknownArity);
void mangleCXXCtorType(CXXCtorType T);
void mangleCXXDtorType(CXXDtorType T);
@@ -265,6 +319,8 @@ private:
void mangleTemplateArg(const NamedDecl *P, const TemplateArgument &A);
void mangleTemplateParameter(unsigned Index);
+
+ void mangleFunctionParam(const ParmVarDecl *parm);
};
}
@@ -334,10 +390,11 @@ void CXXNameMangler::mangle(const NamedDecl *D, llvm::StringRef Prefix) {
// another has a "\01foo". That is known to happen on ELF with the
// tricks normally used for producing aliases (PR9177). Fortunately the
// llvm mangler on ELF is a nop, so we can just avoid adding the \01
- // marker.
+ // marker. We also avoid adding the marker if this is an alias for an
+ // LLVM intrinsic.
llvm::StringRef UserLabelPrefix =
getASTContext().Target.getUserLabelPrefix();
- if (!UserLabelPrefix.empty())
+ if (!UserLabelPrefix.empty() && !ALA->getLabel().startswith("llvm."))
Out << '\01'; // LLVM IR Marker for __asm("foo")
Out << ALA->getLabel();
@@ -552,11 +609,24 @@ void CXXNameMangler::mangleUnscopedTemplateName(TemplateName Template) {
addSubstitution(Template);
}
-void CXXNameMangler::mangleFloat(const llvm::APFloat &F) {
- // TODO: avoid this copy with careful stream management.
- llvm::SmallString<20> Buffer;
- F.bitcastToAPInt().toString(Buffer, 16, false);
- Out.write(Buffer.data(), Buffer.size());
+void CXXNameMangler::mangleFloat(const llvm::APFloat &f) {
+ // ABI:
+ // Floating-point literals are encoded using a fixed-length
+ // lowercase hexadecimal string corresponding to the internal
+ // representation (IEEE on Itanium), high-order bytes first,
+ // without leading zeroes. For example: "Lf bf800000 E" is -1.0f
+ // on Itanium.
+ // APInt::toString uses uppercase hexadecimal, and it's not really
+ // worth embellishing that interface for this use case, so we just
+ // do a second pass to lowercase things.
+ typedef llvm::SmallString<20> buffer_t;
+ buffer_t buffer;
+ f.bitcastToAPInt().toString(buffer, 16, false);
+
+ for (buffer_t::iterator i = buffer.begin(), e = buffer.end(); i != e; ++i)
+ if (isupper(*i)) *i = tolower(*i);
+
+ Out.write(buffer.data(), buffer.size());
}
void CXXNameMangler::mangleNumber(const llvm::APSInt &Value) {
@@ -597,59 +667,162 @@ void CXXNameMangler::mangleCallOffset(int64_t NonVirtual, int64_t Virtual) {
Out << '_';
}
-void CXXNameMangler::mangleUnresolvedScope(NestedNameSpecifier *Qualifier) {
- Qualifier = getASTContext().getCanonicalNestedNameSpecifier(Qualifier);
- switch (Qualifier->getKind()) {
+void CXXNameMangler::mangleUnresolvedType(QualType type) {
+ if (const TemplateSpecializationType *TST =
+ type->getAs<TemplateSpecializationType>()) {
+ if (!mangleSubstitution(QualType(TST, 0))) {
+ mangleTemplatePrefix(TST->getTemplateName());
+
+ // FIXME: GCC does not appear to mangle the template arguments when
+ // the template in question is a dependent template name. Should we
+ // emulate that badness?
+ mangleTemplateArgs(TST->getTemplateName(), TST->getArgs(),
+ TST->getNumArgs());
+ addSubstitution(QualType(TST, 0));
+ }
+ } else if (const DependentTemplateSpecializationType *DTST
+ = type->getAs<DependentTemplateSpecializationType>()) {
+ TemplateName Template
+ = getASTContext().getDependentTemplateName(DTST->getQualifier(),
+ DTST->getIdentifier());
+ mangleTemplatePrefix(Template);
+
+ // FIXME: GCC does not appear to mangle the template arguments when
+ // the template in question is a dependent template name. Should we
+ // emulate that badness?
+ mangleTemplateArgs(Template, DTST->getArgs(), DTST->getNumArgs());
+ } else {
+ // We use the QualType mangle type variant here because it handles
+ // substitutions.
+ mangleType(type);
+ }
+}
+
+/// Mangle everything prior to the base-unresolved-name in an unresolved-name.
+///
+/// \param firstQualifierLookup - the entity found by unqualified lookup
+/// for the first name in the qualifier, if this is for a member expression
+/// \param recursive - true if this is being called recursively,
+/// i.e. if there is more prefix "to the right".
+void CXXNameMangler::mangleUnresolvedPrefix(NestedNameSpecifier *qualifier,
+ NamedDecl *firstQualifierLookup,
+ bool recursive) {
+
+ // x, ::x
+ // <unresolved-name> ::= [gs] <base-unresolved-name>
+
+ // T::x / decltype(p)::x
+ // <unresolved-name> ::= sr <unresolved-type> <base-unresolved-name>
+
+ // T::N::x /decltype(p)::N::x
+ // <unresolved-name> ::= srN <unresolved-type> <unresolved-qualifier-level>+ E
+ // <base-unresolved-name>
+
+ // A::x, N::y, A<T>::z; "gs" means leading "::"
+ // <unresolved-name> ::= [gs] sr <unresolved-qualifier-level>+ E
+ // <base-unresolved-name>
+
+ switch (qualifier->getKind()) {
case NestedNameSpecifier::Global:
- // nothing
- break;
+ Out << "gs";
+
+ // We want an 'sr' unless this is the entire NNS.
+ if (recursive)
+ Out << "sr";
+
+ // We never want an 'E' here.
+ return;
+
case NestedNameSpecifier::Namespace:
- mangleName(Qualifier->getAsNamespace());
+ if (qualifier->getPrefix())
+ mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup,
+ /*recursive*/ true);
+ else
+ Out << "sr";
+ mangleSourceName(qualifier->getAsNamespace()->getIdentifier());
break;
case NestedNameSpecifier::NamespaceAlias:
- mangleName(Qualifier->getAsNamespaceAlias()->getNamespace());
+ if (qualifier->getPrefix())
+ mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup,
+ /*recursive*/ true);
+ else
+ Out << "sr";
+ mangleSourceName(qualifier->getAsNamespaceAlias()->getIdentifier());
break;
+
case NestedNameSpecifier::TypeSpec:
case NestedNameSpecifier::TypeSpecWithTemplate: {
- const Type *QTy = Qualifier->getAsType();
+ // Both cases want this.
+ Out << "sr";
- if (const TemplateSpecializationType *TST =
- dyn_cast<TemplateSpecializationType>(QTy)) {
- if (!mangleSubstitution(QualType(TST, 0))) {
- mangleTemplatePrefix(TST->getTemplateName());
-
- // FIXME: GCC does not appear to mangle the template arguments when
- // the template in question is a dependent template name. Should we
- // emulate that badness?
- mangleTemplateArgs(TST->getTemplateName(), TST->getArgs(),
- TST->getNumArgs());
- addSubstitution(QualType(TST, 0));
- }
- } else {
- // We use the QualType mangle type variant here because it handles
- // substitutions.
- mangleType(QualType(QTy, 0));
- }
+ // We only get here recursively if we're followed by identifiers.
+ if (recursive) Out << 'N';
+
+ mangleUnresolvedType(QualType(qualifier->getAsType(), 0));
+
+ // We never want to print 'E' directly after an unresolved-type,
+ // so we return directly.
+ return;
}
- break;
+
case NestedNameSpecifier::Identifier:
// Member expressions can have these without prefixes.
- if (Qualifier->getPrefix())
- mangleUnresolvedScope(Qualifier->getPrefix());
- mangleSourceName(Qualifier->getAsIdentifier());
+ if (qualifier->getPrefix()) {
+ mangleUnresolvedPrefix(qualifier->getPrefix(), firstQualifierLookup,
+ /*recursive*/ true);
+ } else if (firstQualifierLookup) {
+
+ // Try to make a proper qualifier out of the lookup result, and
+ // then just recurse on that.
+ NestedNameSpecifier *newQualifier;
+ if (TypeDecl *typeDecl = dyn_cast<TypeDecl>(firstQualifierLookup)) {
+ QualType type = getASTContext().getTypeDeclType(typeDecl);
+
+ // Pretend we had a different nested name specifier.
+ newQualifier = NestedNameSpecifier::Create(getASTContext(),
+ /*prefix*/ 0,
+ /*template*/ false,
+ type.getTypePtr());
+ } else if (NamespaceDecl *nspace =
+ dyn_cast<NamespaceDecl>(firstQualifierLookup)) {
+ newQualifier = NestedNameSpecifier::Create(getASTContext(),
+ /*prefix*/ 0,
+ nspace);
+ } else if (NamespaceAliasDecl *alias =
+ dyn_cast<NamespaceAliasDecl>(firstQualifierLookup)) {
+ newQualifier = NestedNameSpecifier::Create(getASTContext(),
+ /*prefix*/ 0,
+ alias);
+ } else {
+ // No sensible mangling to do here.
+ newQualifier = 0;
+ }
+
+ if (newQualifier)
+ return mangleUnresolvedPrefix(newQualifier, /*lookup*/ 0, recursive);
+
+ } else {
+ Out << "sr";
+ }
+
+ mangleSourceName(qualifier->getAsIdentifier());
break;
}
-}
-/// Mangles a name which was not resolved to a specific entity.
-void CXXNameMangler::mangleUnresolvedName(NestedNameSpecifier *Qualifier,
- DeclarationName Name,
- unsigned KnownArity) {
- if (Qualifier)
- mangleUnresolvedScope(Qualifier);
- // FIXME: ambiguity of unqualified lookup with ::
+ // If this was the innermost part of the NNS, and we fell out to
+ // here, append an 'E'.
+ if (!recursive)
+ Out << 'E';
+}
- mangleUnqualifiedName(0, Name, KnownArity);
+/// Mangle an unresolved-name, which is generally used for names which
+/// weren't resolved to specific entities.
+void CXXNameMangler::mangleUnresolvedName(NestedNameSpecifier *qualifier,
+ NamedDecl *firstQualifierLookup,
+ DeclarationName name,
+ unsigned knownArity) {
+ if (qualifier) mangleUnresolvedPrefix(qualifier, firstQualifierLookup);
+ mangleUnqualifiedName(0, name, knownArity);
}
static const FieldDecl *FindFirstNamedDataMember(const RecordDecl *RD) {
@@ -684,10 +857,12 @@ void CXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
case DeclarationName::Identifier: {
if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) {
// We must avoid conflicts between internally- and externally-
- // linked variable declaration names in the same TU.
- // This naming convention is the same as that followed by GCC, though it
- // shouldn't actually matter.
- if (ND && isa<VarDecl>(ND) && ND->getLinkage() == InternalLinkage &&
+ // linked variable and function declaration names in the same TU:
+ // void test() { extern void foo(); }
+ // static void foo();
+ // This naming convention is the same as that followed by GCC,
+ // though it shouldn't actually matter.
+ if (ND && ND->getLinkage() == InternalLinkage &&
ND->getDeclContext()->isFileContext())
Out << 'L';
@@ -734,7 +909,7 @@ void CXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
// We must have an anonymous struct.
const TagDecl *TD = cast<TagDecl>(ND);
- if (const TypedefDecl *D = TD->getTypedefForAnonDecl()) {
+ if (const TypedefNameDecl *D = TD->getTypedefNameForAnonDecl()) {
assert(TD->getDeclContext() == D->getDeclContext() &&
"Typedef should not be in another decl context!");
assert(D->getDeclName().getAsIdentifierInfo() &&
@@ -906,6 +1081,38 @@ void CXXNameMangler::mangleLocalName(const NamedDecl *ND) {
mangleUnqualifiedName(ND);
}
+void CXXNameMangler::manglePrefix(NestedNameSpecifier *qualifier) {
+ switch (qualifier->getKind()) {
+ case NestedNameSpecifier::Global:
+ // nothing
+ return;
+
+ case NestedNameSpecifier::Namespace:
+ mangleName(qualifier->getAsNamespace());
+ return;
+
+ case NestedNameSpecifier::NamespaceAlias:
+ mangleName(qualifier->getAsNamespaceAlias()->getNamespace());
+ return;
+
+ case NestedNameSpecifier::TypeSpec:
+ case NestedNameSpecifier::TypeSpecWithTemplate:
+ mangleUnresolvedType(QualType(qualifier->getAsType(), 0));
+ return;
+
+ case NestedNameSpecifier::Identifier:
+ // Member expressions can have these without prefixes, but that
+ // should end up in mangleUnresolvedPrefix instead.
+ assert(qualifier->getPrefix());
+ manglePrefix(qualifier->getPrefix());
+
+ mangleSourceName(qualifier->getAsIdentifier());
+ return;
+ }
+
+ llvm_unreachable("unexpected nested name specifier");
+}
+
void CXXNameMangler::manglePrefix(const DeclContext *DC, bool NoFunction) {
// <prefix> ::= <prefix> <unqualified-name>
// ::= <template-prefix> <template-args>
@@ -959,7 +1166,7 @@ void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) {
return mangleTemplatePrefix(TD);
if (QualifiedTemplateName *Qualified = Template.getAsQualifiedTemplateName())
- mangleUnresolvedScope(Qualified->getQualifier());
+ manglePrefix(Qualified->getQualifier());
if (OverloadedTemplateStorage *Overloaded
= Template.getAsOverloadedTemplate()) {
@@ -970,7 +1177,7 @@ void CXXNameMangler::mangleTemplatePrefix(TemplateName Template) {
DependentTemplateName *Dependent = Template.getAsDependentTemplateName();
assert(Dependent && "Unknown template name kind?");
- mangleUnresolvedScope(Dependent->getQualifier());
+ manglePrefix(Dependent->getQualifier());
mangleUnscopedTemplateName(Template);
}
@@ -1033,7 +1240,7 @@ void CXXNameMangler::mangleType(TemplateName TN) {
// <class-enum-type> ::= <name>
// <name> ::= <nested-name>
- mangleUnresolvedScope(Dependent->getQualifier());
+ mangleUnresolvedPrefix(Dependent->getQualifier(), 0);
mangleSourceName(Dependent->getIdentifier());
break;
}
@@ -1313,8 +1520,9 @@ void CXXNameMangler::mangleType(const BuiltinType *T) {
case BuiltinType::Overload:
case BuiltinType::Dependent:
- assert(false &&
- "Overloaded and dependent types shouldn't get to name mangling");
+ case BuiltinType::BoundMember:
+ case BuiltinType::UnknownAny:
+ llvm_unreachable("mangling a placeholder type");
break;
case BuiltinType::ObjCId: Out << "11objc_object"; break;
case BuiltinType::ObjCClass: Out << "10objc_class"; break;
@@ -1339,13 +1547,22 @@ void CXXNameMangler::mangleBareFunctionType(const FunctionType *T,
// We should never be mangling something without a prototype.
const FunctionProtoType *Proto = cast<FunctionProtoType>(T);
+ // Record that we're in a function type. See mangleFunctionParam
+ // for details on what we're trying to achieve here.
+ FunctionTypeDepthState saved = FunctionTypeDepth.push();
+
// <bare-function-type> ::= <signature type>+
- if (MangleReturnType)
+ if (MangleReturnType) {
+ FunctionTypeDepth.enterResultType();
mangleType(Proto->getResultType());
+ FunctionTypeDepth.leaveResultType();
+ }
if (Proto->getNumArgs() == 0 && !Proto->isVariadic()) {
// <builtin-type> ::= v # void
Out << 'v';
+
+ FunctionTypeDepth.pop(saved);
return;
}
@@ -1354,6 +1571,8 @@ void CXXNameMangler::mangleBareFunctionType(const FunctionType *T,
Arg != ArgEnd; ++Arg)
mangleType(*Arg);
+ FunctionTypeDepth.pop(saved);
+
// <builtin-type> ::= z # ellipsis
if (Proto->isVariadic())
Out << 'z';
@@ -1590,13 +1809,13 @@ void CXXNameMangler::mangleType(const TemplateSpecializationType *T) {
void CXXNameMangler::mangleType(const DependentNameType *T) {
// Typename types are always nested
Out << 'N';
- mangleUnresolvedScope(T->getQualifier());
+ manglePrefix(T->getQualifier());
mangleSourceName(T->getIdentifier());
Out << 'E';
}
void CXXNameMangler::mangleType(const DependentTemplateSpecializationType *T) {
- // Dependently-scoped template types are always nested
+ // Dependently-scoped template types are nested if they have a prefix.
Out << 'N';
// TODO: avoid making this TemplateName.
@@ -1676,23 +1895,54 @@ void CXXNameMangler::mangleIntegerLiteral(QualType T,
/// Mangles a member expression. Implicit accesses are not handled,
/// but that should be okay, because you shouldn't be able to
/// make an implicit access in a function template declaration.
-void CXXNameMangler::mangleMemberExpr(const Expr *Base,
- bool IsArrow,
- NestedNameSpecifier *Qualifier,
- DeclarationName Member,
- unsigned Arity) {
- // gcc-4.4 uses 'dt' for dot expressions, which is reasonable.
- // OTOH, gcc also mangles the name as an expression.
- Out << (IsArrow ? "pt" : "dt");
- mangleExpression(Base);
- mangleUnresolvedName(Qualifier, Member, Arity);
+void CXXNameMangler::mangleMemberExpr(const Expr *base,
+ bool isArrow,
+ NestedNameSpecifier *qualifier,
+ NamedDecl *firstQualifierLookup,
+ DeclarationName member,
+ unsigned arity) {
+ // <expression> ::= dt <expression> <unresolved-name>
+ // ::= pt <expression> <unresolved-name>
+ Out << (isArrow ? "pt" : "dt");
+ mangleExpression(base);
+ mangleUnresolvedName(qualifier, firstQualifierLookup, member, arity);
+}
+
+/// Look at the callee of the given call expression and determine if
+/// it's a parenthesized id-expression which would have triggered ADL
+/// otherwise.
+static bool isParenthesizedADLCallee(const CallExpr *call) {
+ const Expr *callee = call->getCallee();
+ const Expr *fn = callee->IgnoreParens();
+
+ // Must be parenthesized. IgnoreParens() skips __extension__ nodes,
+ // too, but for those to appear in the callee, it would have to be
+ // parenthesized.
+ if (callee == fn) return false;
+
+ // Must be an unresolved lookup.
+ const UnresolvedLookupExpr *lookup = dyn_cast<UnresolvedLookupExpr>(fn);
+ if (!lookup) return false;
+
+ assert(!lookup->requiresADL());
+
+ // Must be an unqualified lookup.
+ if (lookup->getQualifier()) return false;
+
+ // Must not have found a class member. Note that if one is a class
+ // member, they're all class members.
+ if (lookup->getNumDecls() > 0 &&
+ (*lookup->decls_begin())->isCXXClassMember())
+ return false;
+
+ // Otherwise, ADL would have been triggered.
+ return true;
}
void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
// <expression> ::= <unary operator-name> <expression>
// ::= <binary operator-name> <expression> <expression>
// ::= <trinary operator-name> <expression> <expression> <expression>
- // ::= cl <expression>* E # call
// ::= cv <type> expression # conversion with one argument
// ::= cv <type> _ <expression>* E # conversion with a different number of arguments
// ::= st <type> # sizeof (a type)
@@ -1735,6 +1985,7 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
case Expr::ChooseExprClass:
case Expr::CompoundLiteralExprClass:
case Expr::ExtVectorElementExprClass:
+ case Expr::GenericSelectionExprClass:
case Expr::ObjCEncodeExprClass:
case Expr::ObjCIsaExprClass:
case Expr::ObjCIvarRefExprClass:
@@ -1749,6 +2000,8 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
case Expr::StmtExprClass:
case Expr::UnaryTypeTraitExprClass:
case Expr::BinaryTypeTraitExprClass:
+ case Expr::ArrayTypeTraitExprClass:
+ case Expr::ExpressionTraitExprClass:
case Expr::VAArgExprClass:
case Expr::CXXUuidofExprClass:
case Expr::CXXNoexceptExprClass:
@@ -1784,7 +2037,22 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
case Expr::CXXMemberCallExprClass: // fallthrough
case Expr::CallExprClass: {
const CallExpr *CE = cast<CallExpr>(E);
- Out << "cl";
+
+ // <expression> ::= cp <simple-id> <expression>* E
+ // We use this mangling only when the call would use ADL except
+ // for being parenthesized. Per discussion with David
+ // Vandervoorde, 2011.04.25.
+ if (isParenthesizedADLCallee(CE)) {
+ Out << "cp";
+ // The callee here is a parenthesized UnresolvedLookupExpr with
+ // no qualifier and should always get mangled as a <simple-id>
+ // anyway.
+
+ // <expression> ::= cl <expression>* E
+ } else {
+ Out << "cl";
+ }
+
mangleExpression(CE->getCallee(), CE->getNumArgs());
for (unsigned I = 0, N = CE->getNumArgs(); I != N; ++I)
mangleExpression(CE->getArg(I));
@@ -1815,7 +2083,7 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
case Expr::MemberExprClass: {
const MemberExpr *ME = cast<MemberExpr>(E);
mangleMemberExpr(ME->getBase(), ME->isArrow(),
- ME->getQualifier(), ME->getMemberDecl()->getDeclName(),
+ ME->getQualifier(), 0, ME->getMemberDecl()->getDeclName(),
Arity);
break;
}
@@ -1823,7 +2091,7 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
case Expr::UnresolvedMemberExprClass: {
const UnresolvedMemberExpr *ME = cast<UnresolvedMemberExpr>(E);
mangleMemberExpr(ME->getBase(), ME->isArrow(),
- ME->getQualifier(), ME->getMemberName(),
+ ME->getQualifier(), 0, ME->getMemberName(),
Arity);
if (ME->hasExplicitTemplateArgs())
mangleTemplateArgs(ME->getExplicitTemplateArgs());
@@ -1834,19 +2102,16 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
const CXXDependentScopeMemberExpr *ME
= cast<CXXDependentScopeMemberExpr>(E);
mangleMemberExpr(ME->getBase(), ME->isArrow(),
- ME->getQualifier(), ME->getMember(),
- Arity);
+ ME->getQualifier(), ME->getFirstQualifierFoundInScope(),
+ ME->getMember(), Arity);
if (ME->hasExplicitTemplateArgs())
mangleTemplateArgs(ME->getExplicitTemplateArgs());
break;
}
case Expr::UnresolvedLookupExprClass: {
- // The ABI doesn't cover how to mangle overload sets, so we mangle
- // using something as close as possible to the original lookup
- // expression.
const UnresolvedLookupExpr *ULE = cast<UnresolvedLookupExpr>(E);
- mangleUnresolvedName(ULE->getQualifier(), ULE->getName(), Arity);
+ mangleUnresolvedName(ULE->getQualifier(), 0, ULE->getName(), Arity);
if (ULE->hasExplicitTemplateArgs())
mangleTemplateArgs(ULE->getExplicitTemplateArgs());
break;
@@ -1877,10 +2142,22 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
break;
}
- case Expr::SizeOfAlignOfExprClass: {
- const SizeOfAlignOfExpr *SAE = cast<SizeOfAlignOfExpr>(E);
- if (SAE->isSizeOf()) Out << 's';
- else Out << 'a';
+ case Expr::UnaryExprOrTypeTraitExprClass: {
+ const UnaryExprOrTypeTraitExpr *SAE = cast<UnaryExprOrTypeTraitExpr>(E);
+ switch(SAE->getKind()) {
+ case UETT_SizeOf:
+ Out << 's';
+ break;
+ case UETT_AlignOf:
+ Out << 'a';
+ break;
+ case UETT_VecStep:
+ Diagnostic &Diags = Context.getDiags();
+ unsigned DiagID = Diags.getCustomDiagID(Diagnostic::Error,
+ "cannot yet mangle vec_step expression");
+ Diags.Report(DiagID);
+ return;
+ }
if (SAE->isArgumentType()) {
Out << 't';
mangleType(SAE->getArgumentType());
@@ -1939,7 +2216,7 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
case Expr::ArraySubscriptExprClass: {
const ArraySubscriptExpr *AE = cast<ArraySubscriptExpr>(E);
- // Array subscript is treated as a syntactically wierd form of
+ // Array subscript is treated as a syntactically weird form of
// binary operator.
Out << "ix";
mangleExpression(AE->getLHS());
@@ -2009,6 +2286,10 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
Out << 'E';
break;
+ case Decl::ParmVar:
+ mangleFunctionParam(cast<ParmVarDecl>(D));
+ break;
+
case Decl::EnumConstant: {
const EnumConstantDecl *ED = cast<EnumConstantDecl>(D);
mangleIntegerLiteral(ED->getType(), ED->getInitVal());
@@ -2165,10 +2446,72 @@ void CXXNameMangler::mangleExpression(const Expr *E, unsigned Arity) {
Diags.Report(DiagID);
return;
}
+ break;
}
}
}
+/// Mangle an expression which refers to a parameter variable.
+///
+/// <expression> ::= <function-param>
+/// <function-param> ::= fp <top-level CV-qualifiers> _ # L == 0, I == 0
+/// <function-param> ::= fp <top-level CV-qualifiers>
+/// <parameter-2 non-negative number> _ # L == 0, I > 0
+/// <function-param> ::= fL <L-1 non-negative number>
+/// p <top-level CV-qualifiers> _ # L > 0, I == 0
+/// <function-param> ::= fL <L-1 non-negative number>
+/// p <top-level CV-qualifiers>
+/// <I-1 non-negative number> _ # L > 0, I > 0
+///
+/// L is the nesting depth of the parameter, defined as 1 if the
+/// parameter comes from the innermost function prototype scope
+/// enclosing the current context, 2 if from the next enclosing
+/// function prototype scope, and so on, with one special case: if
+/// we've processed the full parameter clause for the innermost
+/// function type, then L is one less. This definition conveniently
+/// makes it irrelevant whether a function's result type was written
+/// trailing or leading, but is otherwise overly complicated; the
+/// numbering was first designed without considering references to
+/// parameter in locations other than return types, and then the
+/// mangling had to be generalized without changing the existing
+/// manglings.
+///
+/// I is the zero-based index of the parameter within its parameter
+/// declaration clause. Note that the original ABI document describes
+/// this using 1-based ordinals.
+void CXXNameMangler::mangleFunctionParam(const ParmVarDecl *parm) {
+ unsigned parmDepth = parm->getFunctionScopeDepth();
+ unsigned parmIndex = parm->getFunctionScopeIndex();
+
+ // Compute 'L'.
+ // parmDepth does not include the declaring function prototype.
+ // FunctionTypeDepth does account for that.
+ assert(parmDepth < FunctionTypeDepth.getDepth());
+ unsigned nestingDepth = FunctionTypeDepth.getDepth() - parmDepth;
+ if (FunctionTypeDepth.isInResultType())
+ nestingDepth--;
+
+ if (nestingDepth == 0) {
+ Out << "fp";
+ } else {
+ Out << "fL" << (nestingDepth - 1) << 'p';
+ }
+
+ // Top-level qualifiers. We don't have to worry about arrays here,
+ // because parameters declared as arrays should already have been
+ // tranformed to have pointer type. FIXME: apparently these don't
+ // get mangled if used as an rvalue of a known non-class type?
+ assert(!parm->getType()->isArrayType()
+ && "parameter's type is still an array type?");
+ mangleQualifiers(parm->getType().getQualifiers());
+
+ // Parameter index.
+ if (parmIndex != 0) {
+ Out << (parmIndex - 1);
+ }
+ Out << '_';
+}
+
void CXXNameMangler::mangleCXXCtorType(CXXCtorType T) {
// <ctor-dtor-name> ::= C1 # complete object constructor
// ::= C2 # base object constructor
@@ -2287,8 +2630,7 @@ void CXXNameMangler::mangleTemplateArg(const NamedDecl *P,
// an expression. We compensate for it here to produce the correct mangling.
NamedDecl *D = cast<NamedDecl>(A.getAsDecl());
const NonTypeTemplateParmDecl *Parameter = cast<NonTypeTemplateParmDecl>(P);
- bool compensateMangling = D->isCXXClassMember() &&
- !Parameter->getType()->isReferenceType();
+ bool compensateMangling = !Parameter->getType()->isReferenceType();
if (compensateMangling) {
Out << 'X';
mangleOperatorName(OO_Amp, 1);
@@ -2576,7 +2918,7 @@ void ItaniumMangleContext::mangleName(const NamedDecl *D,
getASTContext().getSourceManager(),
"Mangling declaration");
- CXXNameMangler Mangler(*this, Out);
+ CXXNameMangler Mangler(*this, Out, D);
return Mangler.mangle(D);
}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-17 02:27:12 +0000