Patch to allow C-style cast from 'void *' to block pointer type.

(fixes radar 7465023).



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@91171 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 18 insertions, 1 deletions

diff --git a/include/clang/AST/Expr.h b/include/clang/AST/Expr.h
index 48bd1e8041..610cbd8c30 100644
--- a/include/clang/AST/Expr.h
+++ b/include/clang/AST/Expr.h
@@ -1575,7 +1575,10 @@ public:
 
     /// CK_AnyPointerToObjCPointerCast - Casting any pointer to objective-c 
     /// pointer
-    CK_AnyPointerToObjCPointerCast
+    CK_AnyPointerToObjCPointerCast,
+    /// CK_AnyPointerToBlockPointerCast - Casting any pointer to block 
+    /// pointer
+    CK_AnyPointerToBlockPointerCast
 
   };
 
diff --git a/lib/AST/Expr.cpp b/lib/AST/Expr.cpp
index e8758d814d..6eca6a1fa2 100644
--- a/lib/AST/Expr.cpp
+++ b/lib/AST/Expr.cpp
@@ -560,6 +560,8 @@ const char *CastExpr::getCastKindName() const {
     return "MemberPointerToBoolean";
   case CastExpr::CK_AnyPointerToObjCPointerCast:
     return "AnyPointerToObjCPointerCast";
+  case CastExpr::CK_AnyPointerToBlockPointerCast:
+    return "AnyPointerToBlockPointerCast";
   }
 
   assert(0 && "Unhandled cast kind!");
diff --git a/lib/CodeGen/CGExprScalar.cpp b/lib/CodeGen/CGExprScalar.cpp
index 6f65638236..afb7a798ef 100644
--- a/lib/CodeGen/CGExprScalar.cpp
+++ b/lib/CodeGen/CGExprScalar.cpp
@@ -809,6 +809,7 @@ Value *ScalarExprEmitter::EmitCastExpr(CastExpr *CE) {
     break;
 
   case CastExpr::CK_AnyPointerToObjCPointerCast:
+  case CastExpr::CK_AnyPointerToBlockPointerCast:
   case CastExpr::CK_BitCast: {
     Value *Src = Visit(const_cast<Expr*>(E));
     return Builder.CreateBitCast(Src, ConvertType(DestTy));
diff --git a/lib/Sema/SemaCXXCast.cpp b/lib/Sema/SemaCXXCast.cpp
index 857241d714..814af9080d 100644
--- a/lib/Sema/SemaCXXCast.cpp
+++ b/lib/Sema/SemaCXXCast.cpp
@@ -545,6 +545,11 @@ static TryCastResult TryStaticCast(Sema &Self, Expr *&SrcExpr,
         Kind = CastExpr::CK_AnyPointerToObjCPointerCast;
         return TC_Success;
       }
+      else if (CStyle && DestType->isBlockPointerType()) {
+        // allow c-style cast of void * to block pointers.
+        Kind = CastExpr::CK_AnyPointerToBlockPointerCast;
+        return TC_Success;
+      }
     }
   }
 
diff --git a/test/SemaObjCXX/blocks.mm b/test/SemaObjCXX/blocks.mm
index e3304a41b7..04eb5217e5 100644
--- a/test/SemaObjCXX/blocks.mm
+++ b/test/SemaObjCXX/blocks.mm
@@ -44,3 +44,9 @@ namespace N {
     foo(N::X()); // okay
 }
 @end
+
+typedef signed char BOOL;
+void foo6(void *block) {  
+	void (^vb)(id obj, int idx, BOOL *stop) = (void (^)(id, int, BOOL *))block;
+    BOOL (^bb)(id obj, int idx, BOOL *stop) = (BOOL (^)(id, int, BOOL *))block;
+}