Merge pull request #439 from apple/eng/PR-57764169-direct-method-crash-20191106

Also synthesize _cmd and self for properties

Author: MadCoder

clang/lib/Sema/SemaObjCProperty.cpp

@@ -2500,6 +2500,9 @@ void Sema::ProcessPropertyDecl(ObjCPropertyDecl *property) {
     // A user declared getter will be synthesize when @synthesize of
     // the property with the same name is seen in the @implementation
     GetterMethod->setPropertyAccessor(true);
+
+  GetterMethod->createImplicitParams(Context,
+                                     GetterMethod->getClassInterface());
   property->setGetterMethodDecl(GetterMethod);
 
   // Skip setter if property is read-only.
@@ -2574,6 +2577,9 @@ void Sema::ProcessPropertyDecl(ObjCPropertyDecl *property) {
       // A user declared setter will be synthesize when @synthesize of
       // the property with the same name is seen in the @implementation
       SetterMethod->setPropertyAccessor(true);
+
+    SetterMethod->createImplicitParams(Context,
+                                       SetterMethod->getClassInterface());
     property->setSetterMethodDecl(SetterMethod);
   }
   // Add any synthesized methods to the global pool. This allows us to

clang/test/CodeGenObjC/direct-method.m

@@ -190,3 +190,14 @@ int useRoot(Root *r) {
   // CHECK: %{{[^ ]*}} = call i32 bitcast {{.*}} @"\01-[Root intProperty2]"
   return [r getInt] + [r intProperty] + [r intProperty2];
 }
+
+__attribute__((objc_root_class))
+@interface RootDeclOnly
+@property(direct, readonly) int intProperty;
+@end
+
+int useRootDeclOnly(RootDeclOnly *r) {
+  // CHECK-LABEL: define i32 @useRootDeclOnly
+  // CHECK: %{{[^ ]*}} = call i32 bitcast {{.*}} @"\01-[RootDeclOnly intProperty]"
+  return [r intProperty];
+}