[compiler] Add relocatable pointer constants for wasm memory references.

src/compiler/arm64/code-generator-arm64.cc

 // Copyright 2014 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/compiler/code-generator.h"
 
 #include "src/arm64/frames-arm64.h"
 #include "src/arm64/macro-assembler-arm64.h"
 #include "src/ast/scopes.h"
 #include "src/compiler/code-generator-impl.h"
@@ skipping 167 matching lines @@
     }
     return ToImmediate(op);
   }
 
   Operand ToImmediate(InstructionOperand* operand) {
     Constant constant = ToConstant(operand);
     switch (constant.type()) {
       case Constant::kInt32:
         return Operand(constant.ToInt32());
       case Constant::kInt64:
-        return Operand(constant.ToInt64());
+        if (constant.rmode() == RelocInfo::WASM_MEMORY_REFERENCE) {
+          return Operand(constant.ToInt64(), constant.rmode());
+        } else {
+          return Operand(constant.ToInt64());
+        }
       case Constant::kFloat32:
         return Operand(
             isolate()->factory()->NewNumber(constant.ToFloat32(), TENURED));
       case Constant::kFloat64:
         return Operand(
             isolate()->factory()->NewNumber(constant.ToFloat64(), TENURED));
       case Constant::kExternalReference:
         return Operand(constant.ToExternalReference());
       case Constant::kHeapObject:
         return Operand(constant.ToHeapObject());
@@ skipping 1603 matching lines @@
       padding_size -= kInstructionSize;
     }
   }
 }
 
 #undef __
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8