Revert of Remove ExternalArray, derived types, and element kinds

src/ppc/lithium-ppc.cc

Index: src/ppc/lithium-ppc.cc
diff --git a/src/ppc/lithium-ppc.cc b/src/ppc/lithium-ppc.cc
index 19ea818a35d0985425920c4c12d01a042ee3fd3a..92dc76b22d8e17ffde2921c47c53ed22bb10a4da 100644
--- a/src/ppc/lithium-ppc.cc
+++ b/src/ppc/lithium-ppc.cc
@@ -2198,7 +2198,7 @@
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
   LInstruction* result = NULL;
 
-  if (!instr->is_fixed_typed_array()) {
+  if (!instr->is_typed_elements()) {
     LOperand* obj = NULL;
     if (instr->representation().IsDouble()) {
       obj = UseRegister(instr->elements());
@@ -2216,9 +2216,10 @@
   }
 
   bool needs_environment;
-  if (instr->is_fixed_typed_array()) {
+  if (instr->is_external() || instr->is_fixed_typed_array()) {
     // see LCodeGen::DoLoadKeyedExternalArray
-    needs_environment = elements_kind == UINT32_ELEMENTS &&
+    needs_environment = (elements_kind == EXTERNAL_UINT32_ELEMENTS ||
+                         elements_kind == UINT32_ELEMENTS) &&
                         !instr->CheckFlag(HInstruction::kUint32);
   } else {
     // see LCodeGen::DoLoadKeyedFixedDoubleArray and
@@ -2252,7 +2253,7 @@
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
-  if (!instr->is_fixed_typed_array()) {
+  if (!instr->is_typed_elements()) {
     DCHECK(instr->elements()->representation().IsTagged());
     bool needs_write_barrier = instr->NeedsWriteBarrier();
     LOperand* object = NULL;