[turbofan] Add FixedArray peephole optimizations to CodeStubAssembler

src/interpreter/interpreter-assembler.cc

Index: src/interpreter/interpreter-assembler.cc
diff --git a/src/interpreter/interpreter-assembler.cc b/src/interpreter/interpreter-assembler.cc
index fa67a0c29973ac3c92d009e09b604ebf28cd5515..4e911ebb7c61b4aae31392855e19a6ce236c012f 100644
--- a/src/interpreter/interpreter-assembler.cc
+++ b/src/interpreter/interpreter-assembler.cc
@@ -720,7 +720,7 @@ Node* InterpreterAssembler::ExportRegisterFile(Node* array) {
         Int32Sub(Int32Constant(Register(0).ToOperand()), index);
     Node* value = LoadRegister(ChangeInt32ToIntPtr(reg_index));
 
-    StoreFixedArrayElementInt32Index(array, index, value);
+    StoreFixedArrayElement(array, index, value);
 
     var_index.Bind(Int32Add(index, Int32Constant(1)));
     Goto(&loop);
@@ -750,13 +750,13 @@ Node* InterpreterAssembler::ImportRegisterFile(Node* array) {
     Node* condition = Int32LessThan(index, RegisterCount());
     GotoUnless(condition, &done_loop);
 
-    Node* value = LoadFixedArrayElementInt32Index(array, index);
+    Node* value = LoadFixedArrayElement(array, index);
 
     Node* reg_index =
         Int32Sub(Int32Constant(Register(0).ToOperand()), index);
     StoreRegister(value, ChangeInt32ToIntPtr(reg_index));
 
-    StoreFixedArrayElementInt32Index(array, index, StaleRegisterConstant());
+    StoreFixedArrayElement(array, index, StaleRegisterConstant());
 
     var_index.Bind(Int32Add(index, Int32Constant(1)));
     Goto(&loop);