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      1 // RUN: %clang_cc1 -x objective-c++ -fblocks -fms-extensions -rewrite-objc %s -o %t-rw.cpp
      2 // RUN: FileCheck -check-prefix LP --input-file=%t-rw.cpp %s
      3 // radar 7575882
      4 
      5 @interface F {
      6   int supervar;
      7 }
      8 @end
      9 
     10 @interface G : F {
     11 @public
     12   int ivar;
     13 }
     14 @end
     15 
     16 @implementation G
     17 - (void)foo:(F *)arg {
     18         int q = arg->supervar;
     19         int v = ((G *)arg)->ivar;
     20 }
     21 @end
     22 
     23 void objc_assign_strongCast(id);
     24 void __CFAssignWithWriteBarrier(void **location, void *value) {
     25         objc_assign_strongCast((id)value);
     26 }
     27 
     28 // radar 7607605
     29 @interface RealClass {
     30         @public
     31         int f;
     32 }
     33 @end
     34 
     35 @implementation RealClass
     36 @end
     37 
     38 @interface Foo {
     39         id reserved;
     40 }
     41 @end
     42 
     43 @implementation Foo
     44 - (void)bar {
     45         ((RealClass*)reserved)->f = 99;
     46 }
     47 @end
     48 
     49 // CHECK-LP: ((struct G_IMPL *)arg)->ivar
     50 
     51 // CHECK-LP: objc_assign_strongCast((id)value)
     52 
     53 // CHECK-LP: ((struct RealClass_IMPL *)((RealClass *)((struct Foo_IMPL *)self)->reserved))->f
     54