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

src/compiler/x64/code-generator-x64.cc

Index: src/compiler/x64/code-generator-x64.cc
diff --git a/src/compiler/x64/code-generator-x64.cc b/src/compiler/x64/code-generator-x64.cc
index c07a21f8638314fa16bbd93c5eada9e8530036b7..ec0c8b860bb8eaac2aee8f9e4d1b45835c8437d7 100644
--- a/src/compiler/x64/code-generator-x64.cc
+++ b/src/compiler/x64/code-generator-x64.cc
@@ -2075,41 +2075,45 @@ void CodeGenerator::AssembleMove(InstructionOperand* source,
     if (destination->IsRegister() || destination->IsStackSlot()) {
       Register dst = destination->IsRegister() ? g.ToRegister(destination)
                                                : kScratchRegister;
-      switch (src.type()) {
-        case Constant::kInt32:
-          // TODO(dcarney): don't need scratch in this case.
-          __ Set(dst, src.ToInt32());
-          break;
-        case Constant::kInt64:
-          __ Set(dst, src.ToInt64());
-          break;
-        case Constant::kFloat32:
-          __ Move(dst,
-                  isolate()->factory()->NewNumber(src.ToFloat32(), TENURED));
-          break;
-        case Constant::kFloat64:
-          __ Move(dst,
-                  isolate()->factory()->NewNumber(src.ToFloat64(), TENURED));
-          break;
-        case Constant::kExternalReference:
-          __ Move(dst, src.ToExternalReference());
-          break;
-        case Constant::kHeapObject: {
-          Handle<HeapObject> src_object = src.ToHeapObject();
-          Heap::RootListIndex index;
-          int slot;
-          if (IsMaterializableFromFrame(src_object, &slot)) {
-            __ movp(dst, g.SlotToOperand(slot));
-          } else if (IsMaterializableFromRoot(src_object, &index)) {
-            __ LoadRoot(dst, index);
-          } else {
-            __ Move(dst, src_object);
+      if (src.rmode() == RelocInfo::WASM_MEMORY_REFERENCE) {
+        __ movq(dst, src.ToInt64(), src.rmode());
+      } else {
+        switch (src.type()) {
+          case Constant::kInt32:
+            // TODO(dcarney): don't need scratch in this case.
+            __ Set(dst, src.ToInt32());
+            break;
+          case Constant::kInt64:
+            __ Set(dst, src.ToInt64());
+            break;
+          case Constant::kFloat32:
+            __ Move(dst,
+                    isolate()->factory()->NewNumber(src.ToFloat32(), TENURED));
+            break;
+          case Constant::kFloat64:
+            __ Move(dst,
+                    isolate()->factory()->NewNumber(src.ToFloat64(), TENURED));
+            break;
+          case Constant::kExternalReference:
+            __ Move(dst, src.ToExternalReference());
+            break;
+          case Constant::kHeapObject: {
+            Handle<HeapObject> src_object = src.ToHeapObject();
+            Heap::RootListIndex index;
+            int slot;
+            if (IsMaterializableFromFrame(src_object, &slot)) {
+              __ movp(dst, g.SlotToOperand(slot));
+            } else if (IsMaterializableFromRoot(src_object, &index)) {
+              __ LoadRoot(dst, index);
+            } else {
+              __ Move(dst, src_object);
+            }
+            break;
           }
-          break;
+          case Constant::kRpoNumber:
+            UNREACHABLE();  // TODO(dcarney): load of labels on x64.
+            break;
         }
-        case Constant::kRpoNumber:
-          UNREACHABLE();  // TODO(dcarney): load of labels on x64.
-          break;
       }
       if (destination->IsStackSlot()) {
         __ movq(g.ToOperand(destination), kScratchRegister);