Some cleanup fixes

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 4406 matching lines @@
 
   __ bind(&slowcase);
   __ TailCallRuntime(Runtime::kRegExpConstructResult, 3, 1);
 }
 
 
 static void GenerateRecordCallTarget(MacroAssembler* masm) {
   // Cache the called function in a global property cell.  Cache states
   // are uninitialized, monomorphic (indicated by a JSFunction), and
   // megamorphic.
+  // a0 : number of arguments to the construct function
   // a1 : the function to call
   // a2 : cache cell for call target
   Label initialize, done, miss, megamorphic, not_array_function;
 
   ASSERT_EQ(*TypeFeedbackCells::MegamorphicSentinel(masm->isolate()),
             masm->isolate()->heap()->undefined_value());
   ASSERT_EQ(*TypeFeedbackCells::UninitializedSentinel(masm->isolate()),
             masm->isolate()->heap()->the_hole_value());
 
   // Load the cache state into a3.
   __ lw(a3, FieldMemOperand(a2, Cell::kValueOffset));
 
   // A monomorphic cache hit or an already megamorphic state: invoke the
   // function without changing the state.
   __ Branch(&done, eq, a3, Operand(a1));
 
   // If we came here, we need to see if we are the array function.
   // If we didn't have a matching function, and we didn't find the megamorph
   // sentinel, then we have in the cell either some other function or an
   // AllocationSite. Do a map check on the object in a3.
-  Handle<Map> allocation_site_map(
-      masm->isolate()->heap()->allocation_site_map(),
-      masm->isolate());
   __ lw(t1, FieldMemOperand(a3, 0));
   __ LoadRoot(at, Heap::kAllocationSiteMapRootIndex);
   __ Branch(&miss, ne, t1, Operand(at));
 
   // Make sure the function is the Array() function
   __ LoadArrayFunction(a3);
   __ Branch(&megamorphic, ne, a1, Operand(a3));
   __ jmp(&done);
 
   __ bind(&miss);
@@ skipping 18 matching lines @@
 
   // The target function is the Array constructor.
   // Create an AllocationSite if we don't already have it, store it in the cell.
   {
     FrameScope scope(masm, StackFrame::INTERNAL);
     const RegList kSavedRegs =
         1 << 4  |  // a0
         1 << 5  |  // a1
         1 << 6;    // a2
 
+    // Arguments register must be smi-tagged to call out.
     __ SmiTag(a0);
     __ MultiPush(kSavedRegs);
 
     CreateAllocationSiteStub create_stub;
     __ CallStub(&create_stub);
 
     __ MultiPop(kSavedRegs);
     __ SmiUntag(a0);
   }
   __ Branch(&done);
@@ skipping 2783 matching lines @@
   __ bind(&fast_elements_case);
   GenerateCase(masm, FAST_ELEMENTS);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS