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Add mangling for covariant thunks. 

llvm-svn: 80747
This commit is contained in:
Mike Stump 2009-09-02 00:56:18 +00:00
parent a8ee2e7496
commit 3f707e9f14
2 changed files with 52 additions and 6 deletions
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54
clang/lib/CodeGen/Mangle.cpp
View File

@ -39,7 +39,11 @@ namespace {
: Context(C), Out(os), Structor(0), StructorType(0) { }
bool mangle(const NamedDecl *D);
void mangleCalloffset(bool Virtual, int64_t nv, int64_t v);
void mangleThunk(const NamedDecl *ND, bool Virtual, int64_t nv, int64_t v);
void mangleCovariantThunk(const NamedDecl *ND, bool VirtualThis,
int64_t nv_t, int64_t v_t, bool VirtualResult,
int64_t nv_r, int64_t v_r);
void mangleGuardVariable(const VarDecl *D);
void mangleCXXVtable(QualType Type);
@ -237,24 +241,22 @@ void CXXNameMangler::mangleName(const NamedDecl *ND) {
mangleNestedName(ND);
}
void CXXNameMangler::mangleThunk(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
void CXXNameMangler::mangleCalloffset(bool Virtual, int64_t nv,
int64_t v) {
// <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";
Out << "h";
if (nv < 0) {
Out << "n";
nv = -nv;
}
Out << nv;
} else {
Out << "_Tv";
Out << "v";
if (nv < 0) {
Out << "n";
nv = -nv;
@ -268,6 +270,28 @@ void CXXNameMangler::mangleThunk(const NamedDecl *D, bool Virtual, int64_t nv,
Out << v;
}
Out << "_";
}
void CXXNameMangler::mangleThunk(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
Out << "_T";
mangleCalloffset(Virtual, nv, v);
mangleName(D);
}
void CXXNameMangler::mangleCovariantThunk(const NamedDecl *D,
bool VirtualThis, int64_t nv_t,
int64_t v_t, bool VirtualResult,
int64_t nv_r, int64_t v_r) {
// <special-name> ::= Tc <call-offset> <call-offset> <base encoding>
// # base is the nominal target function of thunk
// # first call-offset is 'this' adjustment
// # second call-offset is result adjustment
Out << "_Tc";
mangleCalloffset(VirtualThis, nv_t, v_t);
mangleCalloffset(VirtualResult, nv_r, v_r);
mangleName(D);
}
@ -845,6 +869,24 @@ namespace clang {
os.flush();
}
/// \brief Mangles the a covariant thunk for the declaration D and emits that
/// name to the given output stream.
void mangleCovariantThunk(const NamedDecl *D, bool VirtualThis, int64_t nv_t,
int64_t v_t, bool VirtualResult, int64_t nv_r,
int64_t v_r, 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.mangleCovariantThunk(D, VirtualThis, nv_t, v_t, VirtualResult,
nv_r, v_r);
os.flush();
}
/// mangleGuardVariable - Returns the mangled name for a guard variable
/// for the passed in VarDecl.
void mangleGuardVariable(const VarDecl *D, ASTContext &Context,

4
clang/lib/CodeGen/Mangle.h
View File

@ -36,6 +36,10 @@ namespace clang {
llvm::raw_ostream &os);
void mangleThunk(const NamedDecl *D, bool Virtual, int64_t n, int64_t vn,
ASTContext &Context, llvm::raw_ostream &os);
void mangleCovariantThunk(const NamedDecl *D, bool VirtualThis, int64_t nv_t,
int64_t v_t, bool VirtualResult, int64_t nv_r,
int64_t v_r, 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);