Remove three ObjC fields from non-ObjC runtime

Author: davezarzycki

include/swift/ABI/Metadata.h

@@ -1012,9 +1012,12 @@ struct TargetAnyClassMetadata : public TargetHeapMetadata<Runtime> {
 
   constexpr TargetAnyClassMetadata(TargetClassMetadata<Runtime> *superclass)
     : TargetHeapMetadata<Runtime>(MetadataKind::Class),
-      Superclass(superclass),
-      CacheData{nullptr, nullptr},
-      Data(SWIFT_CLASS_IS_SWIFT_MASK) {}
+      Superclass(superclass)
+#if SWIFT_OBJC_INTEROP
+      , CacheData{nullptr, nullptr},
+      Data(SWIFT_CLASS_IS_SWIFT_MASK)
+#endif
+      {}
 
 #if SWIFT_OBJC_INTEROP
   // Allow setting the metadata kind to a class ISA on class metadata.
@@ -1027,8 +1030,7 @@ struct TargetAnyClassMetadata : public TargetHeapMetadata<Runtime> {
   /// The metadata for the superclass.  This is null for the root class.
   ConstTargetMetadataPointer<Runtime, swift::TargetClassMetadata> Superclass;
 
-  // TODO: remove the CacheData and Data fields in non-ObjC-interop builds.
-
+#if SWIFT_OBJC_INTEROP
   /// The cache data is used for certain dynamic lookups; it is owned
   /// by the runtime and generally needs to interoperate with
   /// Objective-C's use.
@@ -1043,11 +1045,16 @@ struct TargetAnyClassMetadata : public TargetHeapMetadata<Runtime> {
   static constexpr StoredPointer offsetToData() {
     return offsetof(TargetAnyClassMetadata, Data);
   }
+#endif
 
   /// Is this object a valid swift type metadata?  That is, can it be
   /// safely downcast to ClassMetadata?
   bool isTypeMetadata() const {
+#if SWIFT_OBJC_INTEROP
     return (Data & SWIFT_CLASS_IS_SWIFT_MASK);
+#else
+    return true;
+#endif
   }
   /// A different perspective on the same bit
   bool isPureObjC() const {
@@ -1270,6 +1277,7 @@ struct TargetClassMetadata : public TargetAnyClassMetadata<Runtime> {
     return bounds;
   }
 
+#if SWIFT_OBJC_INTEROP
   /// Given a statically-emitted metadata template, this sets the correct
   /// "is Swift" bit for the current runtime. Depending on the deployment
   /// target a binary was compiled for, statically emitted metadata templates
@@ -1294,6 +1302,7 @@ struct TargetClassMetadata : public TargetAnyClassMetadata<Runtime> {
 
     assert(isTypeMetadata());
   }
+#endif
 
   bool isCanonicalStaticallySpecializedGenericMetadata() const {
     auto *description = getDescription();

include/swift/Remote/MetadataReader.h

@@ -2623,6 +2623,7 @@ class MetadataReader {
     // WARNING: the following algorithm works on current modern Apple
     // runtimes but is not actually ABI.  But it is pretty reliable.
 
+#if SWIFT_OBJC_INTEROP
     StoredPointer dataPtr;
     if (!Reader->readInteger(RemoteAddress(classAddress +
                                TargetClassMetadata<Runtime>::offsetToData()),
@@ -2665,6 +2666,9 @@ class MetadataReader {
     }
 
     return dataPtr;
+#else
+    return StoredPointer();
+#endif
   }
 
   IsaEncodingKind getIsaEncoding() {

lib/IRGen/ClassMetadataVisitor.h

@@ -58,15 +58,13 @@ template <class Impl> class ClassMetadataVisitor
     // Metadata header.
     super::layout();
 
-    // ClassMetadata header.  In ObjCInterop mode, this must be
-    // layout-compatible with an Objective-C class.  The superclass
-    // pointer is useful regardless of mode, but the rest of the data
-    // isn't necessary.
-    // FIXME: Figure out what can be removed altogether in non-objc-interop
-    // mode and remove it. rdar://problem/18801263
+    // ClassMetadata header. This must be layout-compatible with Objective-C
+    // classes when interoperability is enabled.
     asImpl().addSuperclass();
-    asImpl().addClassCacheData();
-    asImpl().addClassDataPointer();
+    if (IGM.ObjCInterop) {
+      asImpl().addClassCacheData();
+      asImpl().addClassDataPointer();
+    }
 
     asImpl().addClassFlags();
     asImpl().addInstanceAddressPoint();

stdlib/public/runtime/Metadata.cpp

@@ -114,7 +114,9 @@ Metadata *TargetSingletonMetadataInitialization<InProcess>::allocate(
   // isn't Swift metadata but a plain old ObjC class instead.
   if (metadata->getKind() == MetadataKind::Class) {
     auto *classMetadata = static_cast<ClassMetadata*>(metadata);
+#if SWIFT_OBJC_INTEROP
     classMetadata->setAsTypeMetadata();
+#endif
     auto *fullMetadata = asFullMetadata(metadata);
 
     // Begin by initializing the value witness table; everything else is
@@ -537,8 +539,6 @@ initializeClassMetadataFromPattern(ClassMetadata *metadata,
   auto classRO = metadataExtraData + pattern->ClassRODataOffset;
   metadata->Data =
     reinterpret_cast<uintptr_t>(classRO) | SWIFT_CLASS_IS_SWIFT_MASK;
-#else
-  metadata->Data = SWIFT_CLASS_IS_SWIFT_MASK;
 #endif
 
   // Class flags.
@@ -2201,8 +2201,6 @@ _swift_relocateClassMetadata(const ClassDescriptor *description,
   auto classRO = pattern->Data.get();
   metadata->Data =
     reinterpret_cast<uintptr_t>(classRO) | SWIFT_CLASS_IS_SWIFT_MASK;
-#else
-  metadata->Data = SWIFT_CLASS_IS_SWIFT_MASK;
 #endif
 
   // Class flags.

test/IRGen/class_metadata.swift

@@ -1,6 +1,7 @@
 // RUN: %empty-directory(%t)
 // RUN: %{python} %utils/chex.py < %s > %t/class_metadata.swift
-// RUN: %target-swift-frontend -emit-ir %s | %FileCheck %t/class_metadata.swift -check-prefix=CHECK -check-prefix=CHECK-%target-ptrsize -check-prefix CHECK-%target-import-type -check-prefix=CHECK-%target-cpu
+// RUN: %target-swift-frontend  -enable-objc-interop -emit-ir %s | %FileCheck %t/class_metadata.swift -check-prefixes=CHECK,CHECK-%target-ptrsize,CHECK-%target-import-type,CHECK-%target-cpu -D#MDSIZE=7
+// RUN: %target-swift-frontend -disable-objc-interop -emit-ir %s | %FileCheck %t/class_metadata.swift -check-prefixes=CHECK,CHECK-%target-ptrsize,CHECK-%target-import-type,CHECK-%target-cpu -D#MDSIZE=4
 
 class A {}
 
@@ -20,16 +21,16 @@ class A {}
 //   Negative size in words.
 // CHECK-SAME: i32 2,
 //   Positive size in words.
-// CHECK-32-SAME: i32 14,
-// CHECK-64-SAME: i32 11,
+// CHECK-32-SAME: i32 [[#MDSIZE + 6 + 1]],
+// CHECK-64-SAME: i32 [[#MDSIZE + 3 + 1]],
 //   Field count.
 // CHECK-SAME: i32 0,
 //   Field offset vector offset.
-// CHECK-32-SAME: i32 13,
-// CHECK-64-SAME: i32 10,
+// CHECK-32-SAME: i32 [[#MDSIZE + 6]],
+// CHECK-64-SAME: i32 [[#MDSIZE + 3]],
 //   V-table offset.
-// CHECK-32-SAME: i32 13,
-// CHECK-64-SAME: i32 10,
+// CHECK-32-SAME: i32 [[#MDSIZE + 6]],
+// CHECK-64-SAME: i32 [[#MDSIZE + 3]],
 //   V-table length.
 // CHECK-SAME: i32 1,
 // CHECK-SAME: %swift.method_descriptor {
@@ -61,15 +62,15 @@ class B : A {}
 //   Negative size in words.
 // CHECK-SAME: i32 2,
 //   Positive size in words.
-// CHECK-32-SAME: i32 14,
-// CHECK-64-SAME: i32 11,
+// CHECK-32-SAME: i32 [[#MDSIZE + 6 + 1]],
+// CHECK-64-SAME: i32 [[#MDSIZE + 3 + 1]],
 //   Immediate member count.
 // CHECK-SAME: i32 0,
 //   Field count.
 // CHECK-SAME: i32 0,
 //   Field offset vector offset.
-// CHECK-32-SAME: i32 14,
-// CHECK-64-SAME: i32 11,
+// CHECK-32-SAME: i32 [[#MDSIZE + 6 + 1]],
+// CHECK-64-SAME: i32 [[#MDSIZE + 3 + 1]],
 //   Number of method overrides.
 // CHECK-SAME: i32 1,
 // CHECK-SAME: %swift.method_override_descriptor {
@@ -100,15 +101,15 @@ class C<T> : B {}
 //   Negative size in words.
 // CHECK-SAME: i32 2,
 //   Positive size in words.
-// CHECK-32-SAME: i32 15,
-// CHECK-64-SAME: i32 12,
+// CHECK-32-SAME: i32 [[#MDSIZE + 6 + 2]],
+// CHECK-64-SAME: i32 [[#MDSIZE + 3 + 2]],
 //   Num immediate members.
 // CHECK-32-SAME: i32 1,
 //   Field count.
 // CHECK-SAME: i32 0,
 //   Field offset vector offset.
-// CHECK-32-SAME: i32 15,
-// CHECK-64-SAME: i32 12,
+// CHECK-32-SAME: i32 [[#MDSIZE + 6 + 2]],
+// CHECK-64-SAME: i32 [[#MDSIZE + 3 + 2]],
 //   Instantiation cache.
 // CHECK-SAME: i32 {{.*}} @"$s14class_metadata1CCMI"
 //   Instantiation pattern.
@@ -163,15 +164,15 @@ class D : E {}
 //   Negative size in words.
 // CHECK-SAME: i32 2,
 //   Positive size in words.
-// CHECK-32-SAME: i32 14,
-// CHECK-64-SAME: i32 11,
+// CHECK-32-SAME: i32 [[#MDSIZE + 6 + 1]],
+// CHECK-64-SAME: i32 [[#MDSIZE + 3 + 1]],
 //   Immediate member count.
 // CHECK-SAME: i32 0,
 //   Field count.
 // CHECK-SAME: i32 0,
 //   Field offset vector offset.
-// CHECK-32-SAME: i32 14,
-// CHECK-64-SAME: i32 11,
+// CHECK-32-SAME: i32 [[#MDSIZE + 6 + 1]],
+// CHECK-64-SAME: i32 [[#MDSIZE + 3 + 1]],
 //   Number of method overrides.
 // CHECK-SAME: i32 1,
 // CHECK-SAME: %swift.method_override_descriptor {

test/IRGen/class_resilience.sil

@@ -1,7 +1,8 @@
 // RUN: %empty-directory(%t)
 // RUN: %target-swift-frontend -emit-module -enable-library-evolution -emit-module-path=%t/resilient_struct.swiftmodule -module-name=resilient_struct %S/../Inputs/resilient_struct.swift
 // RUN: %target-swift-frontend -emit-module -enable-library-evolution -emit-module-path=%t/resilient_class.swiftmodule -module-name=resilient_class %S/../Inputs/resilient_class.swift -I %t
-// RUN: %target-swift-frontend -I %t -emit-ir -enable-library-evolution %s | %FileCheck %s
+// RUN: %target-swift-frontend -enable-objc-interop -I %t -emit-ir -enable-library-evolution %s | %FileCheck %s --check-prefixes=CHECK,CHECK-objc
+// RUN: %target-swift-frontend -disable-objc-interop -I %t -emit-ir -enable-library-evolution %s | %FileCheck %s --check-prefixes=CHECK,CHECK-native
 // RUN: %target-swift-frontend -I %t -emit-ir -enable-library-evolution -O %s
 
 // REQUIRES: CPU=x86_64
@@ -24,11 +25,13 @@ import resilient_class
 // CHECK:      [[T0:%.*]] = call swiftcc %swift.metadata_response @"$s15resilient_class22ResilientOutsideParentCMa"(i64 0)
 // CHECK-NEXT: [[META:%.*]] = extractvalue %swift.metadata_response [[T0]], 0
 // CHECK-NEXT: [[META_ADDR:%.*]] = bitcast %swift.type* [[META]] to i8*
-// CHECK-NEXT: [[SIZE_ADDR:%.*]] = getelementptr inbounds i8, i8* [[META_ADDR]], i32 48
+// CHECK-objc-NEXT: [[SIZE_ADDR:%.*]] = getelementptr inbounds i8, i8* [[META_ADDR]], i32 48
+// CHECK-native-NEXT: [[SIZE_ADDR:%.*]] = getelementptr inbounds i8, i8* [[META_ADDR]], i32 24
 // CHECK-NEXT: [[SIZE_PTR:%.*]] = bitcast i8* [[SIZE_ADDR]] to i32*
 // CHECK-NEXT: [[SIZE_2:%.*]] = load i32, i32* [[SIZE_PTR]], align 8
 // CHECK-NEXT: [[SIZE:%.*]] = zext i32 [[SIZE_2]] to i64
-// CHECK-NEXT: [[ALIGN_ADDR:%.*]] = getelementptr inbounds i8, i8* [[META_ADDR]], i32 52
+// CHECK-objc-NEXT: [[ALIGN_ADDR:%.*]] = getelementptr inbounds i8, i8* [[META_ADDR]], i32 52
+// CHECK-native-NEXT: [[ALIGN_ADDR:%.*]] = getelementptr inbounds i8, i8* [[META_ADDR]], i32 28
 // CHECK-NEXT: [[ALIGN_PTR:%.*]] = bitcast i8* [[ALIGN_ADDR]] to i16*
 // CHECK-NEXT: [[ALIGN_2:%.*]] = load i16, i16* [[ALIGN_PTR]], align 4
 // CHECK-NEXT: [[ALIGN:%.*]] = zext i16 [[ALIGN_2]] to i64

test/IRGen/class_resilience.swift

@@ -3,7 +3,8 @@
 // RUN: %target-swift-frontend -emit-module -enable-library-evolution -emit-module-path=%t/resilient_struct.swiftmodule -module-name=resilient_struct %S/../Inputs/resilient_struct.swift
 // RUN: %target-swift-frontend -emit-module -enable-library-evolution -emit-module-path=%t/resilient_enum.swiftmodule -module-name=resilient_enum -I %t %S/../Inputs/resilient_enum.swift
 // RUN: %target-swift-frontend -emit-module -enable-library-evolution -emit-module-path=%t/resilient_class.swiftmodule -module-name=resilient_class -I %t %S/../Inputs/resilient_class.swift
-// RUN: %target-swift-frontend -I %t -emit-ir -enable-library-evolution %t/class_resilience.swift | %FileCheck %t/class_resilience.swift --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-runtime -check-prefix=CHECK-%target-cpu --check-prefix=CHECK-%target-runtime-STABLE-ABI-%target-mandates-stable-abi -DINT=i%target-ptrsize
+// RUN: %target-swift-frontend -enable-objc-interop -I %t -emit-ir -enable-library-evolution %t/class_resilience.swift | %FileCheck %t/class_resilience.swift --check-prefixes=CHECK,CHECK-objc,CHECK-objc%target-ptrsize,CHECK-%target-ptrsize,CHECK-%target-cpu,CHECK-objc-STABLE-ABI-%target-mandates-stable-abi -DINT=i%target-ptrsize -D#MDWORDS=7 -D#MDSIZE32=52 -D#MDSIZE64=80 -D#WORDSIZE=%target-alignment
+// RUN: %target-swift-frontend -disable-objc-interop -I %t -emit-ir -enable-library-evolution %t/class_resilience.swift | %FileCheck %t/class_resilience.swift --check-prefixes=CHECK,CHECK-native,CHECK-native%target-ptrsize,CHECK-%target-ptrsize,CHECK-%target-cpu,CHECK-native-STABLE-ABI-%target-mandates-stable-abi -DINT=i%target-ptrsize -D#MDWORDS=4 -D#MDSIZE32=40 -D#MDSIZE64=56 -D#WORDSIZE=%target-alignment
 // RUN: %target-swift-frontend -I %t -emit-ir -enable-library-evolution -O %t/class_resilience.swift
 
 // CHECK: @"$s16class_resilience26ClassWithResilientPropertyC1s16resilient_struct4SizeVvpWvd" = hidden global [[INT]] 0
@@ -20,8 +21,8 @@
 // CHECK: @"$s16class_resilience27ClassWithResilientThenEmptyC9resilient0H7_struct0E3IntVvpWvd" = hidden global [[INT]] 0,
 
 // CHECK: @"$s16class_resilience26ClassWithResilientPropertyCMo" = {{(protected )?}}{{(dllexport )?}}constant [[BOUNDS]]
-// CHECK-32-SAME: { [[INT]] 52, i32 2, i32 17 }
-// CHECK-64-SAME: { [[INT]] 80, i32 2, i32 14 }
+// CHECK-32-SAME: { [[INT]] [[#MDSIZE32]], i32 2, i32 [[#MDWORDS + 6 + 4]] }
+// CHECK-64-SAME: { [[INT]] [[#MDSIZE64]], i32 2, i32 [[#MDWORDS + 3 + 4]] }
 
 // CHECK: @"$s16class_resilience28ClassWithMyResilientPropertyC1rAA0eF6StructVvpWvd" = hidden constant [[INT]] {{8|16}}
 // CHECK: @"$s16class_resilience28ClassWithMyResilientPropertyC5colors5Int32VvpWvd" = hidden constant [[INT]] {{12|20}}
@@ -101,20 +102,20 @@
 // CHECK-native-SAME: i32 0
 
 // CHECK: @"$s16class_resilience17MyResilientParentCMo" = {{(protected )?}}{{(dllexport )?}}constant [[BOUNDS]]
-// CHECK-32-SAME: { [[INT]] 52, i32 2, i32 15 }
-// CHECK-64-SAME: { [[INT]] 80, i32 2, i32 12 }
+// CHECK-32-SAME: { [[INT]] [[#MDSIZE32]], i32 2, i32 [[#MDWORDS + 6 + 2]] }
+// CHECK-64-SAME: { [[INT]] [[#MDSIZE64]], i32 2, i32 [[#MDWORDS + 3 + 2]] }
 
 // CHECK: @"$s16class_resilience16MyResilientChildCMo" = {{(protected )?}}{{(dllexport )?}}constant [[BOUNDS]]
-// CHECK-32-SAME: { [[INT]] 60, i32 2, i32 16 }
-// CHECK-64-SAME: { [[INT]] 96, i32 2, i32 13 }
+// CHECK-32-SAME: { [[INT]] [[#MDSIZE32 + WORDSIZE + WORDSIZE]], i32 2, i32 [[#MDWORDS + 6 + 3]] }
+// CHECK-64-SAME: { [[INT]] [[#MDSIZE64 + WORDSIZE + WORDSIZE]], i32 2, i32 [[#MDWORDS + 3 + 3]] }
 
 // CHECK: @"$s16class_resilience24MyResilientGenericParentCMo" = {{(protected )?}}{{(dllexport )?}}constant [[BOUNDS]]
-// CHECK-32-SAME: { [[INT]] 52, i32 2, i32 16 }
-// CHECK-64-SAME: { [[INT]] 80, i32 2, i32 13 }
+// CHECK-32-SAME: { [[INT]] [[#MDSIZE32]], i32 2, i32 [[#MDWORDS + 6 + 3]] }
+// CHECK-64-SAME: { [[INT]] [[#MDSIZE64]], i32 2, i32 [[#MDWORDS + 3 + 3]] }
 
 // CHECK: @"$s16class_resilience24MyResilientConcreteChildCMo" = {{(protected )?}}{{(dllexport )?}}constant [[BOUNDS]]
-// CHECK-32-SAME: { [[INT]] 64, i32 2, i32 18 }
-// CHECK-64-SAME: { [[INT]] 104, i32 2, i32 15 }
+// CHECK-32-SAME: { [[INT]] [[#MDSIZE32 + WORDSIZE + WORDSIZE + WORDSIZE]], i32 2, i32 [[#MDWORDS + 6 + 5]] }
+// CHECK-64-SAME: { [[INT]] [[#MDSIZE64 + WORDSIZE + WORDSIZE + WORDSIZE]], i32 2, i32 [[#MDWORDS + 3 + 5]] }
 
 // CHECK: @"$s16class_resilience27ClassWithEmptyThenResilientC5emptyAA0E0VvpWvd" = hidden constant [[INT]] 0,
 // CHECK: @"$s16class_resilience27ClassWithResilientThenEmptyC5emptyAA0G0VvpWvd" = hidden constant [[INT]] 0,
@@ -400,7 +401,8 @@ public class ClassWithResilientThenEmpty {
 // CHECK: entry:
 // CHECK-NEXT: [[FIELDS:%.*]] = alloca [3 x i8**]
 // CHECK-NEXT: [[METADATA_ADDR:%.*]] = bitcast %swift.type* %0 to [[INT]]*
-// CHECK-NEXT: [[FIELDS_DEST:%.*]] = getelementptr inbounds [[INT]], [[INT]]* [[METADATA_ADDR]], [[INT]] {{10|13}}
+// CHECK-objc-NEXT: [[FIELDS_DEST:%.*]] = getelementptr inbounds [[INT]], [[INT]]* [[METADATA_ADDR]], [[INT]] {{10|13}}
+// CHECK-native-NEXT: [[FIELDS_DEST:%.*]] = getelementptr inbounds [[INT]], [[INT]]* [[METADATA_ADDR]], [[INT]] {{7|10}}
 // CHECK-NEXT: [[FIELDS_ADDR:%.*]] = bitcast [3 x i8**]* [[FIELDS]] to i8*
 // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 {{12|24}}, i8* [[FIELDS_ADDR]])
 // CHECK-NEXT: [[FIELDS_PTR:%.*]] = getelementptr inbounds [3 x i8**], [3 x i8**]* [[FIELDS]], i32 0, i32 0
@@ -478,7 +480,8 @@ public class ClassWithResilientThenEmpty {
 // CHECK: entry:
 // CHECK-NEXT: [[FIELDS:%.*]] = alloca [2 x i8**]
 // CHECK-NEXT: [[METADATA_ADDR:%.*]] = bitcast %swift.type* %0 to [[INT]]*
-// CHECK-NEXT: [[FIELDS_DEST:%.*]] = getelementptr inbounds [[INT]], [[INT]]* [[METADATA_ADDR]], [[INT]] {{10|13}}
+// CHECK-objc-NEXT: [[FIELDS_DEST:%.*]] = getelementptr inbounds [[INT]], [[INT]]* [[METADATA_ADDR]], [[INT]] {{10|13}}
+// CHECK-native-NEXT: [[FIELDS_DEST:%.*]] = getelementptr inbounds [[INT]], [[INT]]* [[METADATA_ADDR]], [[INT]] {{7|10}}
 // CHECK-NEXT: [[FIELDS_ADDR:%.*]] = bitcast [2 x i8**]* [[FIELDS]] to i8*
 // CHECK-NEXT: call void @llvm.lifetime.start.p0i8(i64 {{8|16}}, i8* [[FIELDS_ADDR]])
 // CHECK-NEXT: [[FIELDS_PTR:%.*]] = getelementptr inbounds [2 x i8**], [2 x i8**]* [[FIELDS]], i32 0, i32 0

test/IRGen/dynamic_init.sil

@@ -1,4 +1,5 @@
-// RUN: %target-swift-frontend -emit-ir %s | %FileCheck %s
+// RUN: %target-swift-frontend -enable-objc-interop  -emit-ir %s | %FileCheck %s --check-prefixes=CHECK,CHECK-objc
+// RUN: %target-swift-frontend -disable-objc-interop -emit-ir %s | %FileCheck %s --check-prefixes=CHECK,CHECK-native
 
 // REQUIRES: CPU=x86_64
 
@@ -20,7 +21,8 @@ sil @$s12dynamic_init1CCfD : $@convention(method) (@owned C) -> ()
 sil @$s12dynamic_init15testDynamicInityAA1CCm2cm_tF : $@convention(method) (@thick C.Type) -> () {
 bb0(%0 : $@thick C.Type):
   // CHECK:   [[META:%[0-9]+]] = bitcast %swift.type* %0 to %T12dynamic_init1CC* (%swift.type*)**
-  // CHECK:   [[VTABLE_OFFSET:%[0-9]+]] = getelementptr inbounds %T12dynamic_init1CC* (%swift.type*)*, %T12dynamic_init1CC* (%swift.type*)** [[META]], i64 10
+  // CHECK-objc:   [[VTABLE_OFFSET:%[0-9]+]] = getelementptr inbounds %T12dynamic_init1CC* (%swift.type*)*, %T12dynamic_init1CC* (%swift.type*)** [[META]], i64 10
+  // CHECK-native: [[VTABLE_OFFSET:%[0-9]+]] = getelementptr inbounds %T12dynamic_init1CC* (%swift.type*)*, %T12dynamic_init1CC* (%swift.type*)** [[META]], i64 7
   // CHECK:   [[CTOR:%[0-9]+]] = load %T12dynamic_init1CC* (%swift.type*)*, %T12dynamic_init1CC* (%swift.type*)** [[VTABLE_OFFSET]], align 8
   %2 = class_method %0 : $@thick C.Type, #C.init!allocator : (C.Type) -> () -> C, $@convention(method) (@thick C.Type) -> @owned C
   // CHECK:   [[RESULT:%[0-9]+]] = call swiftcc %T12dynamic_init1CC* [[CTOR]](%swift.type* swiftself %0)