AST: Implement mangling support for function types without a prototype.
Function types without prototypes can arise when mangling a function type
within an overloadable function in C. We mangle these as the absence of
any parameter types (not even an empty parameter list).
Differential Revision: http://reviews.llvm.org/D11848
llvm-svn: 244374
diff --git a/clang/lib/AST/MicrosoftMangle.cpp b/clang/lib/AST/MicrosoftMangle.cpp
index 5c2b68c..a5f75ec 100644
--- a/clang/lib/AST/MicrosoftMangle.cpp
+++ b/clang/lib/AST/MicrosoftMangle.cpp
@@ -1620,7 +1620,8 @@
}
void MicrosoftCXXNameMangler::mangleType(const FunctionNoProtoType *T,
Qualifiers, SourceRange) {
- llvm_unreachable("Can't mangle K&R function prototypes");
+ Out << "$$A6";
+ mangleFunctionType(T);
}
void MicrosoftCXXNameMangler::mangleFunctionType(const FunctionType *T,
@@ -1628,7 +1629,7 @@
bool ForceThisQuals) {
// <function-type> ::= <this-cvr-qualifiers> <calling-convention>
// <return-type> <argument-list> <throw-spec>
- const FunctionProtoType *Proto = cast<FunctionProtoType>(T);
+ const FunctionProtoType *Proto = dyn_cast<FunctionProtoType>(T);
SourceRange Range;
if (D) Range = D->getSourceRange();
@@ -1699,7 +1700,7 @@
}
Out << '@';
} else {
- QualType ResultType = Proto->getReturnType();
+ QualType ResultType = T->getReturnType();
if (const auto *AT =
dyn_cast_or_null<AutoType>(ResultType->getContainedAutoType())) {
Out << '?';
@@ -1717,7 +1718,12 @@
// <argument-list> ::= X # void
// ::= <type>+ @
// ::= <type>* Z # varargs
- if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
+ if (!Proto) {
+ // Function types without prototypes can arise when mangling a function type
+ // within an overloadable function in C. We mangle these as the absence of
+ // any parameter types (not even an empty parameter list).
+ Out << '@';
+ } else if (Proto->getNumParams() == 0 && !Proto->isVariadic()) {
Out << 'X';
} else {
// Happens for function pointer type arguments for example.