[cfe-commits] r80743 - in /cfe/trunk/lib/CodeGen: Mangle.cpp Mangle.h
Mike Stump
mrs at apple.com
Tue Sep 1 17:25:38 PDT 2009
Author: mrs
Date: Tue Sep 1 19:25:38 2009
New Revision: 80743
URL: http://llvm.org/viewvc/llvm-project?rev=80743&view=rev
Log:
Add mangling for thunks.
Modified:
cfe/trunk/lib/CodeGen/Mangle.cpp
cfe/trunk/lib/CodeGen/Mangle.h
Modified: cfe/trunk/lib/CodeGen/Mangle.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/Mangle.cpp?rev=80743&r1=80742&r2=80743&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/Mangle.cpp (original)
+++ cfe/trunk/lib/CodeGen/Mangle.cpp Tue Sep 1 19:25:38 2009
@@ -39,6 +39,8 @@
: Context(C), Out(os), Structor(0), StructorType(0) { }
bool mangle(const NamedDecl *D);
+ void mangleThunkName(const NamedDecl *ND, bool Virtual, int64_t nv,
+ int64_t v);
void mangleGuardVariable(const VarDecl *D);
void mangleCXXVtable(QualType Type);
@@ -87,8 +89,8 @@
}
bool CXXNameMangler::mangleFunctionDecl(const FunctionDecl *FD) {
- // Clang's "overloadable" attribute extension to C/C++ implies
- // name mangling (always).
+ // Clang's "overloadable" attribute extension to C/C++ implies name mangling
+ // (always).
if (!FD->hasAttr<OverloadableAttr>()) {
// C functions are not mangled, and "main" is never mangled.
if (!Context.getLangOptions().CPlusPlus || FD->isMain(Context))
@@ -111,8 +113,8 @@
}
bool CXXNameMangler::mangle(const NamedDecl *D) {
- // Any decl can be declared with __asm("foo") on it, and this takes
- // precedence over all other naming in the .o file.
+ // Any decl can be declared with __asm("foo") on it, and this takes precedence
+ // over all other naming in the .o file.
if (const AsmLabelAttr *ALA = D->getAttr<AsmLabelAttr>()) {
// If we have an asm name, then we use it as the mangling.
Out << '\01'; // LLVM IR Marker for __asm("foo")
@@ -185,9 +187,9 @@
// <encoding> ::= <function name> <bare-function-type>
mangleName(FD);
- // Whether the mangling of a function type includes the return type depends
- // on the context and the nature of the function. The rules for deciding
- // whether the return type is included are:
+ // Whether the mangling of a function type includes the return type depends on
+ // the context and the nature of the function. The rules for deciding whether
+ // the return type is included are:
//
// 1. Template functions (names or types) have return types encoded, with
// the exceptions listed below.
@@ -196,8 +198,8 @@
// exceptions listed below.
// 3. Non-template function names do not have return types encoded.
//
- // The exceptions mentioned in (1) and (2) above, for which the return
- // type is never included, are
+ // The exceptions mentioned in (1) and (2) above, for which the return type is
+ // never included, are
// 1. Constructors.
// 2. Destructors.
// 3. Conversion operator functions, e.g. operator int.
@@ -236,6 +238,40 @@
mangleNestedName(ND);
}
+void CXXNameMangler::mangleThunkName(const NamedDecl *D, bool Virtual,
+ int64_t nv, int64_t v) {
+ // <special-name> ::= T <call-offset> <base encoding>
+ // # base is the nominal target function of thunk
+ // <call-offset> ::= h <nv-offset> _
+ // ::= v <v-offset> _
+ // <nv-offset> ::= <offset number> # non-virtual base override
+ // <v-offset> ::= <offset nubmer> _ <virtual offset number>
+ // # virtual base override, with vcall offset
+ if (!Virtual) {
+ Out << "_Th";
+ if (nv < 0) {
+ Out << "n";
+ nv = -nv;
+ }
+ Out << nv;
+ } else {
+ Out << "_Tv";
+ if (nv < 0) {
+ Out << "n";
+ nv = -nv;
+ }
+ Out << nv;
+ Out << "_";
+ if (v < 0) {
+ Out << "n";
+ v = -v;
+ }
+ Out << v;
+ }
+ Out << "_";
+ mangleName(D);
+}
+
void CXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND) {
// <unqualified-name> ::= <operator-name>
// ::= <ctor-dtor-name>
@@ -254,8 +290,8 @@
case DeclarationName::CXXConstructorName:
if (ND == Structor)
- // If the named decl is the C++ constructor we're mangling, use the
- // type we were given.
+ // If the named decl is the C++ constructor we're mangling, use the type
+ // we were given.
mangleCXXCtorType(static_cast<CXXCtorType>(StructorType));
else
// Otherwise, use the complete constructor name. This is relevant if a
@@ -265,8 +301,8 @@
case DeclarationName::CXXDestructorName:
if (ND == Structor)
- // If the named decl is the C++ destructor we're mangling, use the
- // type we were given.
+ // If the named decl is the C++ destructor we're mangling, use the type we
+ // were given.
mangleCXXDtorType(static_cast<CXXDtorType>(StructorType));
else
// Otherwise, use the complete destructor name. This is relevant if a
@@ -637,8 +673,7 @@
else
mangleName(T->getDecl());
- // If this is a class template specialization, mangle the template
- // arguments.
+ // If this is a class template specialization, mangle the template arguments.
if (ClassTemplateSpecializationDecl *Spec
= dyn_cast<ClassTemplateSpecializationDecl>(T->getDecl()))
mangleTemplateArgumentList(Spec->getTemplateArgs());
@@ -773,14 +808,14 @@
}
namespace clang {
- /// \brief Mangles the name of the declaration D and emits that name
- /// to the given output stream.
+ /// \brief Mangles the name of the declaration D and emits that name to the
+ /// given output stream.
///
- /// If the declaration D requires a mangled name, this routine will
- /// emit that mangled name to \p os and return true. Otherwise, \p
- /// os will be unchanged and this routine will return false. In this
- /// case, the caller should just emit the identifier of the declaration
- /// (\c D->getIdentifier()) as its name.
+ /// If the declaration D requires a mangled name, this routine will emit that
+ /// mangled name to \p os and return true. Otherwise, \p os will be unchanged
+ /// and this routine will return false. In this case, the caller should just
+ /// emit the identifier of the declaration (\c D->getIdentifier()) as its
+ /// name.
bool mangleName(const NamedDecl *D, ASTContext &Context,
llvm::raw_ostream &os) {
assert(!isa<CXXConstructorDecl>(D) &&
@@ -796,6 +831,21 @@
return true;
}
+ /// \brief Mangles the a thunk with the offset n for the declaration D and
+ /// emits that name to the given output stream.
+ void mangleThunkName(const NamedDecl *D, bool Virtual, int64_t nv,
+ int64_t v, ASTContext &Context, llvm::raw_ostream &os) {
+ // FIXME: Hum, we might have to thunk these, fix.
+ assert(!isa<CXXConstructorDecl>(D) &&
+ "Use mangleCXXCtor for constructor decls!");
+ assert(!isa<CXXDestructorDecl>(D) &&
+ "Use mangleCXXDtor for destructor decls!");
+
+ CXXNameMangler Mangler(Context, os);
+ Mangler.mangleThunkName(D, Virtual, nv, v);
+ os.flush();
+ }
+
/// mangleGuardVariable - Returns the mangled name for a guard variable
/// for the passed in VarDecl.
void mangleGuardVariable(const VarDecl *D, ASTContext &Context,
Modified: cfe/trunk/lib/CodeGen/Mangle.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/Mangle.h?rev=80743&r1=80742&r2=80743&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/Mangle.h (original)
+++ cfe/trunk/lib/CodeGen/Mangle.h Tue Sep 1 19:25:38 2009
@@ -34,6 +34,8 @@
bool mangleName(const NamedDecl *D, ASTContext &Context,
llvm::raw_ostream &os);
+ void mangleThunkName(const NamedDecl *D, bool Virtual, int64_t n,
+ int64_t vn, ASTContext &Context, llvm::raw_ostream &os);
void mangleGuardVariable(const VarDecl *D, ASTContext &Context,
llvm::raw_ostream &os);
void mangleCXXVtable(QualType T, ASTContext &Context, llvm::raw_ostream &os);
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