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

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

Index: src/compiler/arm64/code-generator-arm64.cc
diff --git a/src/compiler/arm64/code-generator-arm64.cc b/src/compiler/arm64/code-generator-arm64.cc
index 456e7e76080be17551f644b38f834679ee8afd30..efb84d19488b6096b533e452f05ccd2936e9a459 100644
--- a/src/compiler/arm64/code-generator-arm64.cc
+++ b/src/compiler/arm64/code-generator-arm64.cc
@@ -185,7 +185,11 @@ class Arm64OperandConverter final : public InstructionOperandConverter {
       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));