Add Windows support for the GNUstep Objective-C ABI V2.

Summary:
Introduces funclet-based unwinding for Objective-C and fixes an issue
where global blocks can't have their isa pointers initialised on
Windows.

After discussion with Dustin, this changes the name mangling of
Objective-C types to prevent a C++ catch statement of type struct X*
from catching an Objective-C object of type X*.

Reviewers: rjmccall, DHowett-MSFT

Reviewed By: rjmccall, DHowett-MSFT

Subscribers: mgrang, mstorsjo, smeenai, cfe-commits

Differential Revision: https://reviews.llvm.org/D50144

llvm-svn: 339428

1 files changed, 3 insertions, 0 deletions

diff --git a/clang/lib/CodeGen/CGObjCRuntime.h b/clang/lib/CodeGen/CGObjCRuntime.h
index ce082a61eb5..78d5aba4128 100644
--- a/clang/lib/CodeGen/CGObjCRuntime.h
+++ b/clang/lib/CodeGen/CGObjCRuntime.h
@@ -17,6 +17,7 @@
 #define LLVM_CLANG_LIB_CODEGEN_CGOBJCRUNTIME_H
 #include "CGBuilder.h"
 #include "CGCall.h"
+#include "CGCleanup.h"
 #include "CGValue.h"
 #include "clang/AST/DeclObjC.h"
 #include "clang/Basic/IdentifierTable.h" // Selector
@@ -141,6 +142,8 @@ public:
   /// error to Sema.
   virtual llvm::Constant *GetEHType(QualType T) = 0;
 
+  virtual CatchTypeInfo getCatchAllTypeInfo() { return { nullptr, 0 }; }
+
   /// Generate a constant string object.
   virtual ConstantAddress GenerateConstantString(const StringLiteral *) = 0;