MIPS: Refactor PropertyCallbackInfo & FunctionCallbackInfo, part 3.

src/mips/stub-cache-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 822 matching lines @@
                                       bool restore_context) {
   // ----------- S t a t e -------------
   //  -- sp[0] - sp[24]     : FunctionCallbackInfo, incl.
   //                        :  holder (set by CheckPrototypes)
   //  -- sp[28]             : last JS argument
   //  -- ...
   //  -- sp[(argc + 6) * 4] : first JS argument
   //  -- sp[(argc + 7) * 4] : receiver
   // -----------------------------------
   typedef FunctionCallbackArguments FCA;
-  const int kArgs = kFastApiCallArguments;
   // Save calling context.
-  __ sw(cp,
-        MemOperand(sp, (kArgs - 1 + FCA::kContextSaveIndex) * kPointerSize));
+  __ sw(cp, MemOperand(sp, FCA::kContextSaveIndex * kPointerSize));
   // Get the function and setup the context.
   Handle<JSFunction> function = optimization.constant_function();
   __ LoadHeapObject(t1, function);
   __ lw(cp, FieldMemOperand(t1, JSFunction::kContextOffset));
-  __ sw(t1, MemOperand(sp, (kArgs - 1 + FCA::kCalleeIndex) * kPointerSize));
+  __ sw(t1, MemOperand(sp, FCA::kCalleeIndex * kPointerSize));
 
   // Construct the FunctionCallbackInfo.
   Handle<CallHandlerInfo> api_call_info = optimization.api_call_info();
   Handle<Object> call_data(api_call_info->data(), masm->isolate());
   if (masm->isolate()->heap()->InNewSpace(*call_data)) {
     __ li(a0, api_call_info);
     __ lw(t2, FieldMemOperand(a0, CallHandlerInfo::kDataOffset));
   } else {
     __ li(t2, call_data);
   }
   // Store call data.
-  __ sw(t2, MemOperand(sp, (kArgs - 1 + FCA::kDataIndex) * kPointerSize));
+  __ sw(t2, MemOperand(sp, FCA::kDataIndex * kPointerSize));
   // Store isolate.
   __ li(t3, Operand(ExternalReference::isolate_address(masm->isolate())));
-  __ sw(t3, MemOperand(sp, (kArgs - 1 + FCA::kIsolateIndex) * kPointerSize));
+  __ sw(t3, MemOperand(sp, FCA::kIsolateIndex * kPointerSize));
   // Store ReturnValue default and ReturnValue.
   __ LoadRoot(t1, Heap::kUndefinedValueRootIndex);
-  __ sw(t1,
-        MemOperand(sp, (kArgs - 1 + FCA::kReturnValueOffset) * kPointerSize));
-  __ sw(t1,
-        MemOperand(sp,
-            (kArgs - 1 + FCA::kReturnValueDefaultValueIndex) * kPointerSize));
+  __ sw(t1, MemOperand(sp, FCA::kReturnValueOffset * kPointerSize));
+  __ sw(t1, MemOperand(sp, FCA::kReturnValueDefaultValueIndex * kPointerSize));
 
   // Prepare arguments.
-  __ Addu(a2, sp, Operand((kArgs - 1) * kPointerSize));
+  __ Move(a2, sp);
 
   // Allocate the v8::Arguments structure in the arguments' space since
   // it's not controlled by GC.
   const int kApiStackSpace = 4;
 
   FrameScope frame_scope(masm, StackFrame::MANUAL);
   __ EnterExitFrame(false, kApiStackSpace);
 
-  // a0 = v8::Arguments&
+  // a0 = FunctionCallbackInfo&
   // Arguments is built at sp + 1 (sp is a reserved spot for ra).
   __ Addu(a0, sp, kPointerSize);
-
-  // v8::Arguments::implicit_args_
+  // FunctionCallbackInfo::implicit_args_
   __ sw(a2, MemOperand(a0, 0 * kPointerSize));
-  // v8::Arguments::values_
-  __ Addu(t0, a2, Operand(argc * kPointerSize));
+  // FunctionCallbackInfo::values_
+  __ Addu(t0, a2, Operand((kFastApiCallArguments - 1 + argc) * kPointerSize));
   __ sw(t0, MemOperand(a0, 1 * kPointerSize));
-  // v8::Arguments::length_ = argc
+  // FunctionCallbackInfo::length_ = argc
   __ li(t0, Operand(argc));
   __ sw(t0, MemOperand(a0, 2 * kPointerSize));
-  // v8::Arguments::is_construct_call = 0
+  // FunctionCallbackInfo::is_construct_call = 0
   __ sw(zero_reg, MemOperand(a0, 3 * kPointerSize));
 
-  const int kStackUnwindSpace = argc + kArgs + 1;
+  const int kStackUnwindSpace = argc + kFastApiCallArguments + 1;
   Address function_address = v8::ToCData<Address>(api_call_info->callback());
   ApiFunction fun(function_address);
   ExternalReference::Type type = ExternalReference::DIRECT_API_CALL;
   ExternalReference ref =
       ExternalReference(&fun,
                         type,
                         masm->isolate());
   Address thunk_address = FUNCTION_ADDR(&InvokeFunctionCallback);
   ExternalReference::Type thunk_type = ExternalReference::PROFILING_API_CALL;
   ApiFunction thunk_fun(thunk_address);
   ExternalReference thunk_ref = ExternalReference(&thunk_fun, thunk_type,
       masm->isolate());
 
   AllowExternalCallThatCantCauseGC scope(masm);
   MemOperand context_restore_operand(
-      fp, (kArgs + 1 + FCA::kContextSaveIndex) * kPointerSize);
+      fp, (2 + FCA::kContextSaveIndex) * kPointerSize);
   MemOperand return_value_operand(
-      fp, (kArgs + 1 + FCA::kReturnValueOffset) * kPointerSize);
+      fp, (2 + FCA::kReturnValueOffset) * kPointerSize);
+
   __ CallApiFunctionAndReturn(ref,
                               function_address,
                               thunk_ref,
                               a1,
                               kStackUnwindSpace,
                               return_value_operand,
                               restore_context ?
                                   &context_restore_operand : NULL);
 }
 
 
 // Generate call to api function.
 static void GenerateFastApiCall(MacroAssembler* masm,
                                 const CallOptimization& optimization,
                                 Register receiver,
                                 Register scratch,
                                 int argc,
                                 Register* values) {
   ASSERT(optimization.is_simple_api_call());
   ASSERT(!receiver.is(scratch));
 
+  typedef FunctionCallbackArguments FCA;
   const int stack_space = kFastApiCallArguments + argc + 1;
-  const int kHolderIndex = kFastApiCallArguments +
-      FunctionCallbackArguments::kHolderIndex - 1;
   // Assign stack space for the call arguments.
   __ Subu(sp, sp, Operand(stack_space * kPointerSize));
   // Write holder to stack frame.
-  __ sw(receiver, MemOperand(sp, kHolderIndex * kPointerSize));
+  __ sw(receiver, MemOperand(sp, FCA::kHolderIndex * kPointerSize));
   // Write receiver to stack frame.
   int index = stack_space - 1;
   __ sw(receiver, MemOperand(sp, index * kPointerSize));
   // Write the arguments to stack frame.
   for (int i = 0; i < argc; i++) {
     ASSERT(!receiver.is(values[i]));
     ASSERT(!scratch.is(values[i]));
     __ sw(receiver, MemOperand(sp, index-- * kPointerSize));
   }
 
@@ skipping 232 matching lines @@
 Register StubCompiler::CheckPrototypes(Handle<JSObject> object,
                                        Register object_reg,
                                        Handle<JSObject> holder,
                                        Register holder_reg,
                                        Register scratch1,
                                        Register scratch2,
                                        Handle<Name> name,
                                        int save_at_depth,
                                        Label* miss,
                                        PrototypeCheckType check) {
-  const int kHolderIndex = kFastApiCallArguments +
-      FunctionCallbackArguments::kHolderIndex - 1;
   // Make sure that the type feedback oracle harvests the receiver map.
   // TODO(svenpanne) Remove this hack when all ICs are reworked.
   __ li(scratch1, Operand(Handle<Map>(object->map())));
 
   Handle<JSObject> first = object;
   // Make sure there's no overlap between holder and object registers.
   ASSERT(!scratch1.is(object_reg) && !scratch1.is(holder_reg));
   ASSERT(!scratch2.is(object_reg) && !scratch2.is(holder_reg)
          && !scratch2.is(scratch1));
 
   // Keep track of the current object in register reg.
   Register reg = object_reg;
   int depth = 0;
 
+  typedef FunctionCallbackArguments FCA;
   if (save_at_depth == depth) {
-    __ sw(reg, MemOperand(sp, kHolderIndex * kPointerSize));
+    __ sw(reg, MemOperand(sp, FCA::kHolderIndex * kPointerSize));
   }
 
   // Check the maps in the prototype chain.
   // Traverse the prototype chain from the object and do map checks.
   Handle<JSObject> current = object;
   while (!current.is_identical_to(holder)) {
     ++depth;
 
     // Only global objects and objects that do not require access
     // checks are allowed in stubs.
@@ skipping 37 matching lines @@
         // The prototype is in new space; we cannot store a reference to it
         // in the code.  Load it from the map.
         __ lw(reg, FieldMemOperand(map_reg, Map::kPrototypeOffset));
       } else {
         // The prototype is in old space; load it directly.
         __ li(reg, Operand(prototype));
       }
     }
 
     if (save_at_depth == depth) {
-      __ sw(reg, MemOperand(sp, kHolderIndex * kPointerSize));
+      __ sw(reg, MemOperand(sp, FCA::kHolderIndex * kPointerSize));
     }
 
     // Go to the next object in the prototype chain.
     current = prototype;
   }
 
   // Log the check depth.
   LOG(isolate(), IntEvent("check-maps-depth", depth + 1));
 
   if (!holder.is_identical_to(first) || check == CHECK_ALL_MAPS) {
@@ skipping 137 matching lines @@
   GenerateFastApiCall(
       masm(), call_optimization, receiver(), scratch3(), 0, NULL);
 }
 
 
 void BaseLoadStubCompiler::GenerateLoadCallback(
     Register reg,
     Handle<ExecutableAccessorInfo> callback) {
   // Build AccessorInfo::args_ list on the stack and push property name below
   // the exit frame to make GC aware of them and store pointers to them.
-  STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 0);
-  STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == -1);
-  STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == -2);
-  STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == -3);
-  STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == -4);
-  STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == -5);
+  STATIC_ASSERT(PropertyCallbackArguments::kHolderIndex == 0);
+  STATIC_ASSERT(PropertyCallbackArguments::kIsolateIndex == 1);
+  STATIC_ASSERT(PropertyCallbackArguments::kReturnValueDefaultValueIndex == 2);
+  STATIC_ASSERT(PropertyCallbackArguments::kReturnValueOffset == 3);
+  STATIC_ASSERT(PropertyCallbackArguments::kDataIndex == 4);
+  STATIC_ASSERT(PropertyCallbackArguments::kThisIndex == 5);
+  STATIC_ASSERT(PropertyCallbackArguments::kArgsLength == 6);
   ASSERT(!scratch2().is(reg));
   ASSERT(!scratch3().is(reg));
   ASSERT(!scratch4().is(reg));
   __ push(receiver());
-  __ mov(scratch2(), sp);  // scratch2 = AccessorInfo::args_
   if (heap()->InNewSpace(callback->data())) {
     __ li(scratch3(), callback);
     __ lw(scratch3(), FieldMemOperand(scratch3(),
                                       ExecutableAccessorInfo::kDataOffset));
   } else {
     __ li(scratch3(), Handle<Object>(callback->data(), isolate()));
   }
   __ Subu(sp, sp, 6 * kPointerSize);
   __ sw(scratch3(), MemOperand(sp, 5 * kPointerSize));
   __ LoadRoot(scratch3(), Heap::kUndefinedValueRootIndex);
   __ sw(scratch3(), MemOperand(sp, 4 * kPointerSize));
   __ sw(scratch3(), MemOperand(sp, 3 * kPointerSize));
   __ li(scratch4(),
         Operand(ExternalReference::isolate_address(isolate())));
   __ sw(scratch4(), MemOperand(sp, 2 * kPointerSize));
   __ sw(reg, MemOperand(sp, 1 * kPointerSize));
   __ sw(name(), MemOperand(sp, 0 * kPointerSize));
+  __ Addu(scratch2(), sp, 1 * kPointerSize);
 
   __ mov(a2, scratch2());  // Saved in case scratch2 == a1.
   __ mov(a0, sp);  // (first argument - a0) = Handle<Name>
 
   const int kApiStackSpace = 1;
   FrameScope frame_scope(masm(), StackFrame::MANUAL);
   __ EnterExitFrame(false, kApiStackSpace);
 
-  // Create AccessorInfo instance on the stack above the exit frame with
+  // Create PropertyAccessorInfo instance on the stack above the exit frame with
   // scratch2 (internal::Object** args_) as the data.
   __ sw(a2, MemOperand(sp, kPointerSize));
   // (second argument - a1) = AccessorInfo&
   __ Addu(a1, sp, kPointerSize);
 
   const int kStackUnwindSpace = PropertyCallbackArguments::kArgsLength + 1;
   Address getter_address = v8::ToCData<Address>(callback->getter());
   ApiFunction fun(getter_address);
   ExternalReference::Type type = ExternalReference::DIRECT_GETTER_CALL;
   ExternalReference ref = ExternalReference(&fun, type, isolate());
@@ skipping 1729 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_MissForceGeneric);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_MIPS