[cfe-commits] r83448 - in /cfe/trunk: lib/CodeGen/Mangle.cpp lib/CodeGen/Mangle.h test/CodeGenCXX/mangle.cpp
Anders Carlsson
andersca at mac.com
Tue Oct 6 18:45:02 PDT 2009
Author: andersca
Date: Tue Oct 6 20:45:02 2009
New Revision: 83448
URL: http://llvm.org/viewvc/llvm-project?rev=83448&view=rev
Log:
Mangle anonymous structs/unions correctly. Fixes PR5139.
Modified:
cfe/trunk/lib/CodeGen/Mangle.cpp
cfe/trunk/lib/CodeGen/Mangle.h
cfe/trunk/test/CodeGenCXX/mangle.cpp
Modified: cfe/trunk/lib/CodeGen/Mangle.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/Mangle.cpp?rev=83448&r1=83447&r2=83448&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/Mangle.cpp (original)
+++ cfe/trunk/lib/CodeGen/Mangle.cpp Tue Oct 6 20:45:02 2009
@@ -22,6 +22,7 @@
#include "clang/AST/DeclTemplate.h"
#include "clang/AST/ExprCXX.h"
#include "clang/Basic/SourceManager.h"
+#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Support/ErrorHandling.h"
@@ -404,8 +405,8 @@
// ::= <source-name>
DeclarationName Name = ND->getDeclName();
switch (Name.getNameKind()) {
- case DeclarationName::Identifier:
- if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND))
+ case DeclarationName::Identifier: {
+ if (const NamespaceDecl *NS = dyn_cast<NamespaceDecl>(ND)) {
if (NS->isAnonymousNamespace()) {
// This is how gcc mangles these names. It's apparently
// always '1', no matter how many different anonymous
@@ -413,8 +414,38 @@
Out << "12_GLOBAL__N_1";
break;
}
- mangleSourceName(Name.getAsIdentifierInfo());
+ }
+
+ if (const IdentifierInfo *II = Name.getAsIdentifierInfo()) {
+ mangleSourceName(II);
+ break;
+ }
+
+ // We must have an anonymous struct.
+ const TagDecl *TD = cast<TagDecl>(ND);
+ if (const TypedefDecl *D = TD->getTypedefForAnonDecl()) {
+ assert(TD->getDeclContext() == D->getDeclContext() &&
+ "Typedef should not be in another decl context!");
+ assert(D->getDeclName().getAsIdentifierInfo() &&
+ "Typedef was not named!");
+ mangleSourceName(D->getDeclName().getAsIdentifierInfo());
+ break;
+ }
+
+ // Get a unique id for the anonymous struct.
+ uint64_t AnonStructId = Context.getAnonymousStructId(TD);
+
+ // Mangle it as a source name in the form
+ // [n] $_<id>
+ // where n is the length of the string.
+ llvm::SmallString<8> Str;
+ Str += "$_";
+ Str += llvm::utostr(AnonStructId);
+
+ Out << Str.size();
+ Out << Str.str();
break;
+ }
case DeclarationName::ObjCZeroArgSelector:
case DeclarationName::ObjCOneArgSelector:
Modified: cfe/trunk/lib/CodeGen/Mangle.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/Mangle.h?rev=83448&r1=83447&r2=83448&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/Mangle.h (original)
+++ cfe/trunk/lib/CodeGen/Mangle.h Tue Oct 6 20:45:02 2009
@@ -20,6 +20,7 @@
#include "CGCXX.h"
#include "clang/AST/Type.h"
+#include "llvm/ADT/DenseMap.h"
namespace llvm {
class raw_ostream;
@@ -35,11 +36,21 @@
class MangleContext {
ASTContext &Context;
+
+ llvm::DenseMap<const TagDecl *, uint64_t> AnonStructIds;
+
public:
explicit MangleContext(ASTContext &Context)
: Context(Context) { }
ASTContext &getASTContext() const { return Context; }
+
+ uint64_t getAnonymousStructId(const TagDecl *TD) {
+ std::pair<llvm::DenseMap<const TagDecl *,
+ uint64_t>::iterator, bool> Result =
+ AnonStructIds.insert(std::make_pair(TD, AnonStructIds.size()));
+ return Result.first->second;
+ }
};
bool mangleName(MangleContext &Context, const NamedDecl *D,
Modified: cfe/trunk/test/CodeGenCXX/mangle.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenCXX/mangle.cpp?rev=83448&r1=83447&r2=83448&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenCXX/mangle.cpp (original)
+++ cfe/trunk/test/CodeGenCXX/mangle.cpp Tue Oct 6 20:45:02 2009
@@ -207,3 +207,17 @@
// CHECK: @extern_f
void extern_f(void) { }
+struct S7 {
+ struct S { S(); };
+
+ struct {
+ S s;
+ } a;
+};
+
+// PR5139
+// CHECK: @_ZN2S7C1Ev
+// CHECK: @_ZN2S7C2Ev
+// CHECK: @"_ZN2S73$_0C1Ev"
+S7::S7() {}
+
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