Intrinsify ExternalUint8Array.[].

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 4e1a484cc39ae140e597adfad86517c72c4d572f..a740c2311ba20e7a756b1bbbf844d7d7b92c9acf 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -4565,7 +4565,7 @@ class Int8Array : public ByteArray {
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawInt8Array, data_);
   }
 
   static intptr_t InstanceSize() {
@@ -4617,7 +4617,7 @@ class Uint8Array : public ByteArray {
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawUint8Array, data_);
   }
 
   static intptr_t InstanceSize() {
@@ -4669,7 +4669,7 @@ class Int16Array : public ByteArray {
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawInt16Array, data_);
   }
 
   static intptr_t InstanceSize() {
@@ -4721,7 +4721,7 @@ class Uint16Array : public ByteArray {
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawUint16Array, data_);
   }
 
   static intptr_t InstanceSize() {
@@ -4773,7 +4773,7 @@ class Int32Array : public ByteArray {
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawInt32Array, data_);
   }
 
   static intptr_t InstanceSize() {
@@ -4825,7 +4825,7 @@ class Uint32Array : public ByteArray {
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawUint32Array, data_);
   }
 
   static intptr_t InstanceSize() {
@@ -4877,7 +4877,7 @@ class Int64Array : public ByteArray {
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawInt64Array, data_);
   }
 
   static intptr_t InstanceSize() {
@@ -4929,7 +4929,7 @@ class Uint64Array : public ByteArray {
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawUint64Array, data_);
   }
 
   static intptr_t InstanceSize() {
@@ -4981,7 +4981,7 @@ class Float32Array : public ByteArray {
   static const intptr_t kMaxElements = kSmiMax / kBytesPerElement;
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawFloat32Array, data_);
   }
 
   static intptr_t InstanceSize() {
@@ -5038,7 +5038,7 @@ class Float64Array : public ByteArray {
   }
 
   static intptr_t data_offset() {
-    return length_offset() + kWordSize;
+    return OFFSET_OF(RawFloat64Array, data_);
   }
 
   static intptr_t InstanceSize(intptr_t len) {
@@ -5157,6 +5157,10 @@ class ExternalUint8Array : public ByteArray {
     return RoundedAllocationSize(sizeof(RawExternalUint8Array));
   }
 
+  static intptr_t external_data_offset() {
+    return OFFSET_OF(RawExternalUint8Array, external_data_);
+  }
+
   static RawExternalUint8Array* New(uint8_t* data,
                                     intptr_t len,
                                     void* peer,