Implement in-heap backing store for typed arrays.

src/x64/lithium-x64.cc

Index: src/x64/lithium-x64.cc
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 93b1f8786c2619f17470ee4e336ed1ec226524d2..8b7df348d838a17d8748e2ce4c6d0cd59e2d63d1 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -2055,24 +2055,23 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
   LLoadKeyed* result = NULL;
 
-  if (!instr->is_external()) {
+  if (!instr->is_external() && !instr->is_fixed_typed_array()) {
     LOperand* obj = UseRegisterAtStart(instr->elements());
     result = new(zone()) LLoadKeyed(obj, key);
   } else {
     ASSERT(
         (instr->representation().IsInteger32() &&
-         (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
-         (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
+         !(IsDoubleOrFloatElementsKind(instr->elements_kind()))) ||
         (instr->representation().IsDouble() &&
-         ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-          (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-    LOperand* external_pointer = UseRegister(instr->elements());
-    result = new(zone()) LLoadKeyed(external_pointer, key);
+         (IsDoubleOrFloatElementsKind(instr->elements_kind()))));
+    LOperand* backing_store = UseRegister(instr->elements());
+    result = new(zone()) LLoadKeyed(backing_store, key);
   }
 
   DefineAsRegister(result);
   bool can_deoptimize = instr->RequiresHoleCheck() ||
-      (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS);
+      (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS) ||
+      (elements_kind == UINT32_ELEMENTS);
   // An unsigned int array load might overflow and cause a deopt, make sure it
   // has an environment.
   return can_deoptimize ? AssignEnvironment(result) : result;
@@ -2093,7 +2092,7 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
   ElementsKind elements_kind = instr->elements_kind();
 
-  if (!instr->is_external()) {
+  if (!instr->is_external() && !instr->is_fixed_typed_array()) {
     ASSERT(instr->elements()->representation().IsTagged());
     bool needs_write_barrier = instr->NeedsWriteBarrier();
     LOperand* object = NULL;
@@ -2123,21 +2122,23 @@ LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
   }
 
   ASSERT(
-      (instr->value()->representation().IsInteger32() &&
-       (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
-       (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
-      (instr->value()->representation().IsDouble() &&
-       ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
-        (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
-  ASSERT(instr->elements()->representation().IsExternal());
+       (instr->value()->representation().IsInteger32() &&
+       !IsDoubleOrFloatElementsKind(elements_kind)) ||
+       (instr->value()->representation().IsDouble() &&
+       IsDoubleOrFloatElementsKind(elements_kind)));
+  ASSERT((instr->is_fixed_typed_array() &&
+          instr->elements()->representation().IsTagged()) ||
+         (instr->is_external() &&
+          instr->elements()->representation().IsExternal()));
   bool val_is_temp_register =
       elements_kind == EXTERNAL_PIXEL_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT_ELEMENTS;
+      elements_kind == EXTERNAL_FLOAT_ELEMENTS ||
+      elements_kind == FLOAT32_ELEMENTS;
   LOperand* val = val_is_temp_register ? UseTempRegister(instr->value())
       : UseRegister(instr->value());
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-  LOperand* external_pointer = UseRegister(instr->elements());
-  return new(zone()) LStoreKeyed(external_pointer, key, val);
+  LOperand* backing_store = UseRegister(instr->elements());
+  return new(zone()) LStoreKeyed(backing_store, key, val);
 }