| Index: runtime/vm/assembler_arm.cc
 | 
| diff --git a/runtime/vm/assembler_arm.cc b/runtime/vm/assembler_arm.cc
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| index 09f02aa360968751f46bc194dc61d39a7bdb377a..ddd7c996d14c50f3bee4b034ff94dcb0d1e31720 100644
 | 
| --- a/runtime/vm/assembler_arm.cc
 | 
| +++ b/runtime/vm/assembler_arm.cc
 | 
| @@ -2164,8 +2164,10 @@ OperandSize Address::OperandSizeFor(intptr_t cid) {
 | 
|      case kImmutableArrayCid:
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|        return kWord;
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|      case kOneByteStringCid:
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| +    case kExternalOneByteStringCid:
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|        return kByte;
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|      case kTwoByteStringCid:
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| +    case kExternalTwoByteStringCid:
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|        return kHalfword;
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|      case kTypedDataInt8ArrayCid:
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|        return kByte;
 | 
| 
 |