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, 1 deletions

diff --git a/clang/lib/CodeGen/CodeGenFunction.h b/clang/lib/CodeGen/CodeGenFunction.h
index f9e28423297..878923a85bd 100644
--- a/clang/lib/CodeGen/CodeGenFunction.h
+++ b/clang/lib/CodeGen/CodeGenFunction.h
@@ -470,7 +470,7 @@ public:
   /// potentially set the return value.
   bool SawAsmBlock = false;
 
-  const FunctionDecl *CurSEHParent = nullptr;
+  const NamedDecl *CurSEHParent = nullptr;
 
   /// True if the current function is an outlined SEH helper. This can be a
   /// finally block or filter expression.
@@ -2878,6 +2878,8 @@ public:
   void EnterSEHTryStmt(const SEHTryStmt &S);
   void ExitSEHTryStmt(const SEHTryStmt &S);
 
+  void pushSEHCleanup(CleanupKind kind,
+                      llvm::Function *FinallyFunc);
   void startOutlinedSEHHelper(CodeGenFunction &ParentCGF, bool IsFilter,
                               const Stmt *OutlinedStmt);