Make sure that we mangle overloaded operators that are member functions correctly, giving them the correct arity.
With this seemingly insignificant fix, we are now able to build and link clang using clang itself! (LLVM still has to be built with gcc for the time being).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91893 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/Mangle.cpp b/lib/CodeGen/Mangle.cpp
index 6c28d22..089d777 100644
--- a/lib/CodeGen/Mangle.cpp
+++ b/lib/CodeGen/Mangle.cpp
@@ -480,10 +480,17 @@
mangleType(Context.getASTContext().getCanonicalType(Name.getCXXNameType()));
break;
- case DeclarationName::CXXOperatorName:
- mangleOperatorName(Name.getCXXOverloadedOperator(),
- cast<FunctionDecl>(ND)->getNumParams());
+ case DeclarationName::CXXOperatorName: {
+ unsigned Arity = cast<FunctionDecl>(ND)->getNumParams();
+
+ // If we have a C++ member function, we need to include the 'this' pointer.
+ // FIXME: This does not make sense for operators that are static, but their
+ // names stay the same regardless of the arity (operator new for instance).
+ if (isa<CXXMethodDecl>(ND))
+ Arity++;
+ mangleOperatorName(Name.getCXXOverloadedOperator(), Arity);
break;
+ }
case DeclarationName::CXXLiteralOperatorName:
// FIXME: This mangling is not yet official.
@@ -611,16 +618,24 @@
case OO_Array_Delete: Out << "da"; break;
// ::= ps # + (unary)
// ::= pl # +
- case OO_Plus: Out << (Arity == 1? "ps" : "pl"); break;
+ case OO_Plus:
+ assert((Arity == 1 || Arity == 2) && "Invalid arity!");
+ Out << (Arity == 1? "ps" : "pl"); break;
// ::= ng # - (unary)
// ::= mi # -
- case OO_Minus: Out << (Arity == 1? "ng" : "mi"); break;
+ case OO_Minus:
+ assert((Arity == 1 || Arity == 2) && "Invalid arity!");
+ Out << (Arity == 1? "ng" : "mi"); break;
// ::= ad # & (unary)
// ::= an # &
- case OO_Amp: Out << (Arity == 1? "ad" : "an"); break;
+ case OO_Amp:
+ assert((Arity == 1 || Arity == 2) && "Invalid arity!");
+ Out << (Arity == 1? "ad" : "an"); break;
// ::= de # * (unary)
// ::= ml # *
- case OO_Star: Out << (Arity == 1? "de" : "ml"); break;
+ case OO_Star:
+ assert((Arity == 1 || Arity == 2) && "Invalid arity!");
+ Out << (Arity == 1? "de" : "ml"); break;
// ::= co # ~
case OO_Tilde: Out << "co"; break;
// ::= dv # /
diff --git a/test/CodeGenCXX/mangle.cpp b/test/CodeGenCXX/mangle.cpp
index 090a3f1..88465cf 100644
--- a/test/CodeGenCXX/mangle.cpp
+++ b/test/CodeGenCXX/mangle.cpp
@@ -141,7 +141,7 @@
// PR5017
extern "C" {
struct Debug {
- const Debug& operator<< (unsigned a) const { }
+ const Debug& operator<< (unsigned a) const { return *this; }
};
Debug dbg;
// CHECK: @_ZNK5DebuglsEj
@@ -270,5 +270,23 @@
// CHECK: define void @_ZN11Expressions2f4ILb1EEEvPAquT_Li1ELi2E_i
template <bool b> void f4(int (*)[b ? 1 : 2]) { };
template void f4<true>(int (*)[1]);
-
}
+
+struct Ops {
+ Ops& operator+(const Ops&);
+ Ops& operator-(const Ops&);
+ Ops& operator&(const Ops&);
+ Ops& operator*(const Ops&);
+
+ void *v;
+};
+
+// CHECK: define %struct.Ops* @_ZN3OpsplERKS_
+Ops& Ops::operator+(const Ops&) { return *this; }
+// CHECK: define %struct.Ops* @_ZN3OpsmiERKS_
+Ops& Ops::operator-(const Ops&) { return *this; }
+// CHECK: define %struct.Ops* @_ZN3OpsanERKS_
+Ops& Ops::operator&(const Ops&) { return *this; }
+// CHECK: define %struct.Ops* @_ZN3OpsmlERKS_
+Ops& Ops::operator*(const Ops&) { return *this; }
+
diff --git a/test/CodeGenCXX/member-functions.cpp b/test/CodeGenCXX/member-functions.cpp
index ebc9ed7..087e62c 100644
--- a/test/CodeGenCXX/member-functions.cpp
+++ b/test/CodeGenCXX/member-functions.cpp
@@ -58,6 +58,6 @@
void test3() {
T t1, t2;
- // RUN: grep "call i64 @_ZN1TpsERKS_" %t
+ // RUN: grep "call i64 @_ZN1TplERKS_" %t
T result = t1 + t2;
}