Fix <rdar://problem/6451399> problems with labels and blocks.

- Move the 'LabelMap' from Sema to Scope. To avoid layering problems, the second element is now a 'StmtTy *', which makes the LabelMap a bit more verbose to deal with.
- Add 'ActiveScope' to Sema. Managed by ActOnStartOfFunctionDef(), ObjCActOnStartOfMethodDef(), ActOnBlockStmtExpr().
- Changed ActOnLabelStmt(), ActOnGotoStmt(), ActOnAddrLabel(), and ActOnFinishFunctionBody() to use the new ActiveScope.
- Added FIXME to workaround in ActOnFinishFunctionBody() (for dealing with C++ nested functions).  

llvm-svn: 65694

1 files changed, 2 insertions, 0 deletions

diff --git a/clang/lib/Sema/SemaDeclObjC.cpp b/clang/lib/Sema/SemaDeclObjC.cpp
index dc30ac2ea90..cc867862552 100644
--- a/clang/lib/Sema/SemaDeclObjC.cpp
+++ b/clang/lib/Sema/SemaDeclObjC.cpp
@@ -36,6 +36,8 @@ void Sema::ObjCActOnStartOfMethodDef(Scope *FnBodyScope, DeclTy *D) {
   // Allow all of Sema to see that we are entering a method definition.
   PushDeclContext(FnBodyScope, MDecl);
 
+  ActiveScope = FnBodyScope;
+
   // Create Decl objects for each parameter, entrring them in the scope for
   // binding to their use.