ARC: make assignment to 'self' within class methods illegal. Fixes <rdar://problem/10416568>.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@144572 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 20 insertions, 11 deletions

diff --git a/lib/AST/DeclObjC.cpp b/lib/AST/DeclObjC.cpp
index 35ee7c6ccd..766b673bde 100644
--- a/lib/AST/DeclObjC.cpp
+++ b/lib/AST/DeclObjC.cpp
@@ -580,17 +580,26 @@ void ObjCMethodDecl::createImplicitParams(ASTContext &Context,
 
   bool selfIsPseudoStrong = false;
   bool selfIsConsumed = false;
-  if (isInstanceMethod() && Context.getLangOptions().ObjCAutoRefCount) {
-    selfIsConsumed = hasAttr<NSConsumesSelfAttr>();
-
-    // 'self' is always __strong.  It's actually pseudo-strong except
-    // in init methods (or methods labeled ns_consumes_self), though.
-    Qualifiers qs;
-    qs.setObjCLifetime(Qualifiers::OCL_Strong);
-    selfTy = Context.getQualifiedType(selfTy, qs);
-
-    // In addition, 'self' is const unless this is an init method.
-    if (getMethodFamily() != OMF_init && !selfIsConsumed) {
+  
+  if (Context.getLangOptions().ObjCAutoRefCount) {
+    if (isInstanceMethod()) {
+      selfIsConsumed = hasAttr<NSConsumesSelfAttr>();
+
+      // 'self' is always __strong.  It's actually pseudo-strong except
+      // in init methods (or methods labeled ns_consumes_self), though.
+      Qualifiers qs;
+      qs.setObjCLifetime(Qualifiers::OCL_Strong);
+      selfTy = Context.getQualifiedType(selfTy, qs);
+
+      // In addition, 'self' is const unless this is an init method.
+      if (getMethodFamily() != OMF_init && !selfIsConsumed) {
+        selfTy = selfTy.withConst();
+        selfIsPseudoStrong = true;
+      }
+    }
+    else {
+      assert(isClassMethod());
+      // 'self' is always const in class methods.
       selfTy = selfTy.withConst();
       selfIsPseudoStrong = true;
     }