[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 ecb99f34f4618903d1e0c77622611d274e2cfab4..e3837eeff529ad092bb5ca83c85c97ad927a4d3b 100644
--- a/src/compiler/x64/instruction-selector-x64.cc
+++ b/src/compiler/x64/instruction-selector-x64.cc
@@ -22,7 +22,9 @@ class X64OperandGenerator final : public OperandGenerator {
   bool CanBeImmediate(Node* node) {
     switch (node->opcode()) {
       case IrOpcode::kInt32Constant:
+      case IrOpcode::kRelocatableInt32Constant:
         return true;
+      case IrOpcode::kRelocatableInt64Constant:

[titzer, 2016/03/23 20:35:36]

Probably don't want this case here.

[gdeepti1, 2016/03/31 22:29:54]

Done.

       case IrOpcode::kInt64Constant: {
         const int64_t value = OpParameter<int64_t>(node);
         return value == static_cast<int64_t>(static_cast<int32_t>(value));