Revert "Implement in-heap backing store for typed arrays."

src/arm/lithium-arm.cc

Index: src/arm/lithium-arm.cc
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index a8602937c50fed4750c830b4f2e27cf41035bc81..470469fb9ed09b38a25e367a9c730f87b6d06ffd 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -2110,7 +2110,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
   LLoadKeyed* result = NULL;
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_external()) {
     LOperand* obj = NULL;
     if (instr->representation().IsDouble()) {
       obj = UseRegister(instr->elements());
@@ -2122,19 +2122,20 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   } else {
     ASSERT(
         (instr->representation().IsInteger32() &&
-         !IsDoubleOrFloatElementsKind(instr->elements_kind())) ||
+         (elements_kind != EXTERNAL_FLOAT_ELEMENTS) &&
+         (elements_kind != EXTERNAL_DOUBLE_ELEMENTS)) ||
         (instr->representation().IsDouble() &&
-         IsDoubleOrFloatElementsKind(instr->elements_kind())));
-    LOperand* backing_store = UseRegister(instr->elements());
-    result = new(zone()) LLoadKeyed(backing_store, key);
+         ((elements_kind == EXTERNAL_FLOAT_ELEMENTS) ||
+          (elements_kind == EXTERNAL_DOUBLE_ELEMENTS))));
+    LOperand* external_pointer = UseRegister(instr->elements());
+    result = new(zone()) LLoadKeyed(external_pointer, key);
   }
 
   DefineAsRegister(result);
   // An unsigned int array load might overflow and cause a deopt, make sure it
   // has an environment.
   bool can_deoptimize = instr->RequiresHoleCheck() ||
-      elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS ||
-      elements_kind == UINT32_ELEMENTS;
+      (elements_kind == EXTERNAL_UNSIGNED_INT_ELEMENTS);
   return can_deoptimize ? AssignEnvironment(result) : result;
 }
 
@@ -2151,7 +2152,7 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_external()) {
     ASSERT(instr->elements()->representation().IsTagged());
     bool needs_write_barrier = instr->NeedsWriteBarrier();
     LOperand* object = NULL;
@@ -2180,17 +2181,16 @@ LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
 
   ASSERT(
       (instr->value()->representation().IsInteger32() &&
-       !IsDoubleOrFloatElementsKind(instr->elements_kind())) ||
+       (instr->elements_kind() != EXTERNAL_FLOAT_ELEMENTS) &&
+       (instr->elements_kind() != EXTERNAL_DOUBLE_ELEMENTS)) ||
       (instr->value()->representation().IsDouble() &&
-       IsDoubleOrFloatElementsKind(instr->elements_kind())));
-  ASSERT((instr->is_fixed_typed_array() &&
-          instr->elements()->representation().IsTagged()) ||
-         (instr->is_external() &&
-          instr->elements()->representation().IsExternal()));
+       ((instr->elements_kind() == EXTERNAL_FLOAT_ELEMENTS) ||
+        (instr->elements_kind() == EXTERNAL_DOUBLE_ELEMENTS))));
+  ASSERT(instr->elements()->representation().IsExternal());
   LOperand* val = UseRegister(instr->value());
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
-  LOperand* backing_store = UseRegister(instr->elements());
-  return new(zone()) LStoreKeyed(backing_store, key, val);
+  LOperand* external_pointer = UseRegister(instr->elements());
+  return new(zone()) LStoreKeyed(external_pointer, key, val);
 }