Move name mangling support from CodeGen to AST. In the
process, perform a number of refactorings:
- Move MiscNameMangler member functions to MangleContext
- Remove GlobalDecl dependency from MangleContext
- Make MangleContext abstract and move Itanium/Microsoft functionality
to their own classes/files
- Implement ASTContext::createMangleContext and have CodeGen use it
No (intended) functionality change.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@123386 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/AST/Mangle.cpp b/lib/AST/Mangle.cpp
new file mode 100644
index 0000000..83d9ed6
--- /dev/null
+++ b/lib/AST/Mangle.cpp
@@ -0,0 +1,132 @@
+//===--- Mangle.cpp - Mangle C++ Names --------------------------*- C++ -*-===//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// Implements generic name mangling support for blocks and Objective-C.
+//
+//===----------------------------------------------------------------------===//
+#include "clang/AST/Mangle.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/Decl.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/DeclObjC.h"
+#include "clang/AST/DeclTemplate.h"
+#include "clang/AST/ExprCXX.h"
+#include "clang/Basic/ABI.h"
+#include "clang/Basic/SourceManager.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/Support/raw_ostream.h"
+#include "llvm/Support/ErrorHandling.h"
+
+#define MANGLE_CHECKER 0
+
+#if MANGLE_CHECKER
+#include <cxxabi.h>
+#endif
+
+using namespace clang;
+
+// FIXME: For blocks we currently mimic GCC's mangling scheme, which leaves
+// much to be desired. Come up with a better mangling scheme.
+
+namespace {
+
+static void mangleFunctionBlock(MangleContext &Context,
+ llvm::StringRef Outer,
+ const BlockDecl *BD,
+ llvm::SmallVectorImpl<char> &Res) {
+ llvm::raw_svector_ostream Out(Res);
+ Out << "__" << Outer << "_block_invoke_" << Context.getBlockId(BD, true);
+}
+
+static void checkMangleDC(const DeclContext *DC, const BlockDecl *BD) {
+#ifndef NDEBUG
+ const DeclContext *ExpectedDC = BD->getDeclContext();
+ while (isa<BlockDecl>(ExpectedDC) || isa<EnumDecl>(ExpectedDC))
+ ExpectedDC = ExpectedDC->getParent();
+ assert(DC == ExpectedDC && "Given decl context did not match expected!");
+#endif
+}
+
+}
+
+void MangleContext::mangleGlobalBlock(const BlockDecl *BD,
+ llvm::SmallVectorImpl<char> &Res) {
+ llvm::raw_svector_ostream Out(Res);
+ Out << "__block_global_" << getBlockId(BD, false);
+}
+
+void MangleContext::mangleCtorBlock(const CXXConstructorDecl *CD,
+ CXXCtorType CT, const BlockDecl *BD,
+ llvm::SmallVectorImpl<char> &Res) {
+ checkMangleDC(CD, BD);
+ llvm::SmallString<64> Buffer;
+ mangleCXXCtor(CD, CT, Buffer);
+ mangleFunctionBlock(*this, Buffer, BD, Res);
+}
+
+void MangleContext::mangleDtorBlock(const CXXDestructorDecl *DD,
+ CXXDtorType DT, const BlockDecl *BD,
+ llvm::SmallVectorImpl<char> &Res) {
+ checkMangleDC(DD, BD);
+ llvm::SmallString<64> Buffer;
+ mangleCXXDtor(DD, DT, Buffer);
+ mangleFunctionBlock(*this, Buffer, BD, Res);
+}
+
+void MangleContext::mangleBlock(const DeclContext *DC, const BlockDecl *BD,
+ llvm::SmallVectorImpl<char> &Res) {
+ assert(!isa<CXXConstructorDecl>(DC) && !isa<CXXDestructorDecl>(DC));
+ checkMangleDC(DC, BD);
+
+ llvm::SmallString<64> Buffer;
+ if (const ObjCMethodDecl *Method = dyn_cast<ObjCMethodDecl>(DC)) {
+ mangleObjCMethodName(Method, Buffer);
+ } else {
+ const NamedDecl *ND = cast<NamedDecl>(DC);
+ if (IdentifierInfo *II = ND->getIdentifier())
+ Buffer = II->getName();
+ else {
+ // FIXME: We were doing a mangleUnqualifiedName() before, but that's
+ // a private member of a class that will soon itself be private to the
+ // Itanium C++ ABI object. What should we do now? Right now, I'm just
+ // calling the mangleName() method on the MangleContext; is there a
+ // better way?
+ mangleName(ND, Buffer);
+ }
+ }
+
+ mangleFunctionBlock(*this, Buffer, BD, Res);
+}
+
+void MangleContext::mangleObjCMethodName(const ObjCMethodDecl *MD,
+ llvm::SmallVectorImpl<char> &Res) {
+ llvm::SmallString<64> Name;
+ llvm::raw_svector_ostream OS(Name), Out(Res);
+
+ const ObjCContainerDecl *CD =
+ dyn_cast<ObjCContainerDecl>(MD->getDeclContext());
+ assert (CD && "Missing container decl in GetNameForMethod");
+ OS << (MD->isInstanceMethod() ? '-' : '+') << '[' << CD->getName();
+ if (const ObjCCategoryImplDecl *CID = dyn_cast<ObjCCategoryImplDecl>(CD))
+ OS << '(' << CID << ')';
+ OS << ' ' << MD->getSelector().getAsString() << ']';
+
+ Out << OS.str().size() << OS.str();
+}
+
+void MangleContext::mangleBlock(const BlockDecl *BD,
+ llvm::SmallVectorImpl<char> &Res) {
+ const DeclContext *DC = BD->getDeclContext();
+ while (isa<BlockDecl>(DC) || isa<EnumDecl>(DC))
+ DC = DC->getParent();
+ if (DC->isFunctionOrMethod())
+ mangleBlock(DC, BD, Res);
+ else
+ mangleGlobalBlock(BD, Res);
+}