1 files changed, 96 insertions, 0 deletions
diff --git a/contrib/llvm/tools/clang/lib/AST/ItaniumCXXABI.cpp b/contrib/llvm/tools/clang/lib/AST/ItaniumCXXABI.cpp
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--- /dev/null
+++ b/contrib/llvm/tools/clang/lib/AST/ItaniumCXXABI.cpp
@@ -0,0 +1,96 @@
+//===------- ItaniumCXXABI.cpp - AST support for the Itanium C++ ABI ------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This provides C++ AST support targeting the Itanium C++ ABI, which is
+// documented at:
+//  http://www.codesourcery.com/public/cxx-abi/abi.html
+//  http://www.codesourcery.com/public/cxx-abi/abi-eh.html
+//
+// It also supports the closely-related ARM C++ ABI, documented at:
+// http://infocenter.arm.com/help/topic/com.arm.doc.ihi0041c/IHI0041C_cppabi.pdf
+//
+//===----------------------------------------------------------------------===//
+
+#include "CXXABI.h"
+#include "clang/AST/ASTContext.h"
+#include "clang/AST/DeclCXX.h"
+#include "clang/AST/MangleNumberingContext.h"
+#include "clang/AST/RecordLayout.h"
+#include "clang/AST/Type.h"
+#include "clang/Basic/TargetInfo.h"
+
+using namespace clang;
+
+namespace {
+
+/// \brief Keeps track of the mangled names of lambda expressions and block
+/// literals within a particular context.
+class ItaniumNumberingContext : public MangleNumberingContext {
+  llvm::DenseMap<IdentifierInfo*, unsigned> VarManglingNumbers;
+
+public:
+  /// Variable decls are numbered by identifier.
+  virtual unsigned getManglingNumber(const VarDecl *VD) {
+    return ++VarManglingNumbers[VD->getIdentifier()];
+  }
+};
+
+class ItaniumCXXABI : public CXXABI {
+protected:
+  ASTContext &Context;
+public:
+  ItaniumCXXABI(ASTContext &Ctx) : Context(Ctx) { }
+
+  std::pair<uint64_t, unsigned>
+  getMemberPointerWidthAndAlign(const MemberPointerType *MPT) const {
+    const TargetInfo &Target = Context.getTargetInfo();
+    TargetInfo::IntType PtrDiff = Target.getPtrDiffType(0);
+    uint64_t Width = Target.getTypeWidth(PtrDiff);
+    unsigned Align = Target.getTypeAlign(PtrDiff);
+    if (MPT->getPointeeType()->isFunctionType())
+      Width = 2 * Width;
+    return std::make_pair(Width, Align);
+  }
+
+  CallingConv getDefaultMethodCallConv(bool isVariadic) const {
+    return CC_C;
+  }
+
+  // We cheat and just check that the class has a vtable pointer, and that it's
+  // only big enough to have a vtable pointer and nothing more (or less).
+  bool isNearlyEmpty(const CXXRecordDecl *RD) const {
+
+    // Check that the class has a vtable pointer.
+    if (!RD->isDynamicClass())
+      return false;
+
+    const ASTRecordLayout &Layout = Context.getASTRecordLayout(RD);
+    CharUnits PointerSize = 
+      Context.toCharUnitsFromBits(Context.getTargetInfo().getPointerWidth(0));
+    return Layout.getNonVirtualSize() == PointerSize;
+  }
+
+  virtual MangleNumberingContext *createMangleNumberingContext() const {
+    return new ItaniumNumberingContext();
+  }
+};
+
+class ARMCXXABI : public ItaniumCXXABI {
+public:
+  ARMCXXABI(ASTContext &Ctx) : ItaniumCXXABI(Ctx) { }
+};
+}
+
+CXXABI *clang::CreateItaniumCXXABI(ASTContext &Ctx) {
+  return new ItaniumCXXABI(Ctx);
+}
+
+CXXABI *clang::CreateARMCXXABI(ASTContext &Ctx) {
+  return new ARMCXXABI(Ctx);
+}