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

src/compiler/x64/instruction-selector-x64.cc

Index: src/compiler/x64/instruction-selector-x64.cc
diff --git a/src/compiler/x64/instruction-selector-x64.cc b/src/compiler/x64/instruction-selector-x64.cc
index ea1d48b0ccbd0451550d2447874f2c8d273305d3..dd99e89296c28ebb1ce17504f112fc467fd96a6e 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -22,6 +22,7 @@ class X64OperandGenerator final : public OperandGenerator {
   bool CanBeImmediate(Node* node) {
     switch (node->opcode()) {
       case IrOpcode::kInt32Constant:
+      case IrOpcode::kRelocatableInt32Constant:
         return true;
       case IrOpcode::kInt64Constant: {
         const int64_t value = OpParameter<int64_t>(node);