Robustified address calculations on A64.

src/a64/macro-assembler-a64.cc

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5112 matching lines @@
   if (inline_data->IsInlineData()) {
     uint64_t payload = inline_data->InlineData();
     // We use BitField to decode the payload, and BitField can only handle
     // 32-bit values.
     ASSERT(is_uint32(payload));
     if (payload != 0) {
       int reg_code = RegisterBits::decode(payload);
       reg_ = Register::XRegFromCode(reg_code);
       uint64_t smi_check_delta = DeltaBits::decode(payload);
       ASSERT(smi_check_delta != 0);
-      smi_check_ = inline_data - (smi_check_delta * kInstructionSize);
+      smi_check_ = inline_data->preceding(smi_check_delta);
     }
   }
 }
 
 
 #undef __
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_A64