[stubs] Add LoadFixedArrayElements with int index

src/code-stub-assembler.h

Index: src/code-stub-assembler.h
diff --git a/src/code-stub-assembler.h b/src/code-stub-assembler.h
index 066fc1f336106dea8b8abdf6c83384a0d4e5d8f8..1483407ceca4e5d4ae17efb63f0830d481a24e52 100644
--- a/src/code-stub-assembler.h
+++ b/src/code-stub-assembler.h
@@ -300,6 +300,11 @@ class V8_EXPORT_PRIVATE CodeStubAssembler : public compiler::CodeAssembler {
   Node* LoadFixedArrayElement(
       Node* object, Node* index, int additional_offset = 0,
       ParameterMode parameter_mode = INTEGER_PARAMETERS);
+  Node* LoadFixedArrayElement(Node* object, int index,
+                              int additional_offset = 0) {
+    return LoadFixedArrayElement(object, IntPtrConstant(index),
+                                 additional_offset, INTPTR_PARAMETERS);
+  }
   // Load an array element from a FixedArray, untag it and return it as Word32.
   Node* LoadAndUntagToWord32FixedArrayElement(
       Node* object, Node* index, int additional_offset = 0,