Array constructor can be simplified by loading context from JSFunction.

src/mips/code-stubs-mips.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 5714 matching lines @@
   // Also pop ra to get Ret(0).
   __ MultiPop(kSavedRegs | ra.bit());
   __ Ret();
 }
 
 
 template<class T>
 static void CreateArrayDispatch(MacroAssembler* masm,
                                 AllocationSiteOverrideMode mode) {
   if (mode == DISABLE_ALLOCATION_SITES) {
-    T stub(GetInitialFastElementsKind(),
-           CONTEXT_CHECK_REQUIRED,
-           mode);
+    T stub(GetInitialFastElementsKind(), mode);
     __ TailCallStub(&stub);
   } else if (mode == DONT_OVERRIDE) {
     int last_index = GetSequenceIndexFromFastElementsKind(
         TERMINAL_FAST_ELEMENTS_KIND);
     for (int i = 0; i <= last_index; ++i) {
       ElementsKind kind = GetFastElementsKindFromSequenceIndex(i);
       T stub(kind);
       __ TailCallStub(&stub, eq, a3, Operand(kind));
     }
 
@@ skipping 28 matching lines @@
 
   // look at the first argument
   __ lw(t1, MemOperand(sp, 0));
   __ Branch(&normal_sequence, eq, t1, Operand(zero_reg));
 
   if (mode == DISABLE_ALLOCATION_SITES) {
     ElementsKind initial = GetInitialFastElementsKind();
     ElementsKind holey_initial = GetHoleyElementsKind(initial);
 
     ArraySingleArgumentConstructorStub stub_holey(holey_initial,
-                                                  CONTEXT_CHECK_REQUIRED,
                                                   DISABLE_ALLOCATION_SITES);
     __ TailCallStub(&stub_holey);
 
     __ bind(&normal_sequence);
     ArraySingleArgumentConstructorStub stub(initial,
-                                            CONTEXT_CHECK_REQUIRED,
                                             DISABLE_ALLOCATION_SITES);
     __ TailCallStub(&stub);
   } else if (mode == DONT_OVERRIDE) {
     // We are going to create a holey array, but our kind is non-holey.
     // Fix kind and retry (only if we have an allocation site in the cell).
     __ Addu(a3, a3, Operand(1));
     __ lw(t1, FieldMemOperand(a2, Cell::kValueOffset));
 
     if (FLAG_debug_code) {
       __ lw(t1, FieldMemOperand(t1, 0));
@@ skipping 30 matching lines @@
 
 template<class T>
 static void ArrayConstructorStubAheadOfTimeHelper(Isolate* isolate) {
   int to_index = GetSequenceIndexFromFastElementsKind(
       TERMINAL_FAST_ELEMENTS_KIND);
   for (int i = 0; i <= to_index; ++i) {
     ElementsKind kind = GetFastElementsKindFromSequenceIndex(i);
     T stub(kind);
     stub.GetCode(isolate);
     if (AllocationSite::GetMode(kind) != DONT_TRACK_ALLOCATION_SITE) {
-      T stub1(kind, CONTEXT_CHECK_REQUIRED, DISABLE_ALLOCATION_SITES);
+      T stub1(kind, DISABLE_ALLOCATION_SITES);
       stub1.GetCode(isolate);
     }
   }
 }
 
 
 void ArrayConstructorStubBase::GenerateStubsAheadOfTime(Isolate* isolate) {
   ArrayConstructorStubAheadOfTimeHelper<ArrayNoArgumentConstructorStub>(
       isolate);
   ArrayConstructorStubAheadOfTimeHelper<ArraySingleArgumentConstructorStub>(
@@ skipping 173 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS