Index: lib/CodeGen/CGCall.cpp
===================================================================
--- lib/CodeGen/CGCall.cpp
+++ lib/CodeGen/CGCall.cpp
@@ -14,6 +14,7 @@
 
 #include "CGCall.h"
 #include "ABIInfo.h"
+#include "CGBlocks.h"
 #include "CGCXXABI.h"
 #include "CGCleanup.h"
 #include "CodeGenFunction.h"
@@ -2462,9 +2463,22 @@
     // In ARC, end functions that return a retainable type with a call
     // to objc_autoreleaseReturnValue.
     if (AutoreleaseResult) {
+#ifndef NDEBUG
+      QualType RT;
+
+      if (auto *FD = dyn_cast<FunctionDecl>(CurCodeDecl))
+        RT = FD->getReturnType();
+      else if (auto *MD = dyn_cast<ObjCMethodDecl>(CurCodeDecl))
+        RT = MD->getReturnType();
+      else if (isa<BlockDecl>(CurCodeDecl))
+        RT = BlockInfo->BlockExpression->getFunctionType()->getReturnType();
+      else
+        llvm_unreachable("Unexpected function/method type");
+
       assert(getLangOpts().ObjCAutoRefCount &&
              !FI.isReturnsRetained() &&
-             RetTy->isObjCRetainableType());
+             RT->isObjCRetainableType());
+#endif
       RV = emitAutoreleaseOfResult(*this, RV);
     }
 
Index: test/CodeGenObjCXX/auto-release-result-assert.mm
===================================================================
--- /dev/null
+++ test/CodeGenObjCXX/auto-release-result-assert.mm
@@ -0,0 +1,35 @@
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -emit-llvm -fblocks -fobjc-arc -o - %s | FileCheck %s
+
+// CHECK-LABEL: define %struct.S1* @_Z4foo1i(
+// CHECK: %[[CALL:[a-z0-9]+]] = call %struct.S1* @_Z4foo0i
+// CHECK: ret %struct.S1* %[[CALL]]
+
+// CHECK-LABEL: define %struct.S1* @_ZN2S22m1Ev(
+// CHECK: %[[CALL:[a-z0-9]+]] = call %struct.S1* @_Z4foo0i
+// CHECK: ret %struct.S1* %[[CALL]]
+
+// CHECK-LABEL: define internal %struct.S1* @Block1_block_invoke(
+// CHECK: %[[CALL:[a-z0-9]+]] = call %struct.S1* @_Z4foo0i
+// CHECK: ret %struct.S1* %[[CALL]]
+
+struct S1;
+
+typedef __attribute__((NSObject)) struct __attribute__((objc_bridge(id))) S1 * S1Ref;
+
+S1Ref foo0(int);
+
+struct S2 {
+  S1Ref m1();
+};
+
+S1Ref foo1(int a) {
+  return foo0(a);
+}
+
+S1Ref S2::m1() {
+  return foo0(0);
+}
+
+S1Ref (^Block1)(void) = ^{
+  return foo0(0);
+};