Fix code to mark block variables as const to actually work. Fix

isObjCObjectPointerType to work with qualified types.  Adjust test for 
changes.

If the SemaExpr changes are wrong or break existing code, feel free to 
delete the "ExprTy.addConst();" line and revert my changes to 
test/Sema/block-literal.c.

llvm-svn: 67489

clang/lib/AST/ASTContext.cpp

@@ -2469,7 +2469,8 @@ bool ASTContext::isObjCObjectPointerType(QualType Ty) const {
   // Check to see if this is 'id' or 'Class', both of which are typedefs for
   // pointer types.  This looks for the typedef specifically, not for the
   // underlying type.
-  if (Ty == getObjCIdType() || Ty == getObjCClassType())
+  if (Ty.getUnqualifiedType() == getObjCIdType() ||
+      Ty.getUnqualifiedType() == getObjCClassType())
     return true;
   
   // If this a pointer to an interface (e.g. NSString*), it is ok.

clang/lib/Sema/SemaExpr.cpp

@@ -932,15 +932,14 @@ Sema::ActOnDeclarationNameExpr(Scope *S, SourceLocation Loc,
     // Blocks that have these can't be constant.
     CurBlock->hasBlockDeclRefExprs = true;
 
+    QualType ExprTy = VD->getType().getNonReferenceType();
     // The BlocksAttr indicates the variable is bound by-reference.
     if (VD->getAttr<BlocksAttr>())
-      return Owned(new (Context) BlockDeclRefExpr(VD, 
-                               VD->getType().getNonReferenceType(), Loc, true));
+      return Owned(new (Context) BlockDeclRefExpr(VD, ExprTy, Loc, true));
 
     // Variable will be bound by-copy, make it const within the closure.
-    VD->getType().addConst();
-    return Owned(new (Context) BlockDeclRefExpr(VD, 
-                             VD->getType().getNonReferenceType(), Loc, false));
+    ExprTy.addConst();
+    return Owned(new (Context) BlockDeclRefExpr(VD, ExprTy, Loc, false));
   }
   // If this reference is not in a block or if the referenced variable is
   // within the block, create a normal DeclRefExpr.

clang/test/Sema/block-literal.c

@@ -39,7 +39,7 @@ void test2() {
 	}
 
 foo:
-	takeclosure(^{ x = 4; });  // expected-error {{variable is not assignable (missing __block type specifier)}}
+	takeclosure(^{ x = 4; });  // expected-error {{read-only variable is not assignable}}
   __block y = 7; // expected-warning {{type specifier missing, defaults to 'int'}}
   takeclosure(^{ y = 8; });
 }
@@ -56,7 +56,7 @@ void test4() {
 
 void myfunc(int (^block)(int)) {}
 
-void myfunc3(int *x);
+void myfunc3(const int *x);
 
 void test5() {
     int a;