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[MS ABI] Mangle unnamed enums correctly 

Unnamed enums take the name of the first enumerator they define.

llvm-svn: 290509
This commit is contained in:
David Majnemer 2016-12-25 05:26:02 +00:00
parent 83c451e998
commit a5cfddc367
2 changed files with 13 additions and 2 deletions
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11
clang/lib/AST/MicrosoftMangle.cpp
View File

@ -863,21 +863,28 @@ void MicrosoftCXXNameMangler::mangleUnqualifiedName(const NamedDecl *ND,
}
}
llvm::SmallString<64> Name("<unnamed-type-");
llvm::SmallString<64> Name;
if (DeclaratorDecl *DD =
Context.getASTContext().getDeclaratorForUnnamedTagDecl(TD)) {
// Anonymous types without a name for linkage purposes have their
// declarator mangled in if they have one.
Name += "<unnamed-type-";
Name += DD->getName();
} else if (TypedefNameDecl *TND =
Context.getASTContext().getTypedefNameForUnnamedTagDecl(
TD)) {
// Anonymous types without a name for linkage purposes have their
// associate typedef mangled in if they have one.
Name += "<unnamed-type-";
Name += TND->getName();
} else if (auto *ED = dyn_cast<EnumDecl>(TD)) {
auto EnumeratorI = ED->enumerator_begin();
assert(EnumeratorI != ED->enumerator_end());
Name += "<unnamed-enum-";
Name += EnumeratorI->getName();
} else {
// Otherwise, number the types using a $S prefix.
Name += "$S";
Name += "<unnamed-type-$S";
Name += llvm::utostr(Context.getAnonymousStructId(TD) + 1);
}
Name += ">";

4
clang/test/CodeGenCXX/mangle-ms-cxx11.cpp
View File

@ -343,3 +343,7 @@ A a;
int call_it = (A::default_args(), 1);
}
enum { enumerator };
void f(decltype(enumerator)) {}
// CHECK-DAG: define void @"\01?f@@YAXW4<unnamed-enum-enumerator>@@@Z"(