Use the HandlerFrontendHeader in most call compilers.

src/arm/stub-cache-arm.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 739 matching lines @@
   // ----------- S t a t e -------------
   //  -- r0: receiver
   //  -- r1: function to call
   // -----------------------------------
 
   // Check that the function really is a function.
   __ JumpIfSmi(r1, miss);
   __ CompareObjectType(r1, r3, r3, JS_FUNCTION_TYPE);
   __ b(ne, miss);
 
-  // Patch the receiver on the stack with the global proxy if
-  // necessary.
   if (object->IsGlobalObject()) {

[Igor Sheludko, 2013/11/28 12:54:27]

Looks like PatchGlobalProxy(object);
Why don't make GenerateCallFunction() private method and call the patch
function?

+    const int argc = arguments.immediate();
+    const int receiver_offset = argc * kPointerSize;
     __ ldr(r3, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
-    __ str(r3, MemOperand(sp, arguments.immediate() * kPointerSize));
+    __ str(r3, MemOperand(sp, receiver_offset));
   }
 
   // Invoke the function.
   CallKind call_kind = CallICBase::Contextual::decode(extra_ic_state)
       ? CALL_AS_FUNCTION
       : CALL_AS_METHOD;
   __ InvokeFunction(r1, arguments, JUMP_FUNCTION, NullCallWrapper(), call_kind);
 }
 
 
@@ skipping 767 matching lines @@
 
 
 void CallStubCompiler::GenerateNameCheck(Handle<Name> name, Label* miss) {
   if (kind_ == Code::KEYED_CALL_IC) {
     __ cmp(r2, Operand(name));
     __ b(ne, miss);
   }
 }
 
 
-void CallStubCompiler::GenerateGlobalReceiverCheck(Handle<JSObject> object,
-                                                   Handle<JSObject> holder,
-                                                   Handle<Name> name,
-                                                   Label* miss) {
-  ASSERT(holder->IsGlobalObject());
-
-  // Get the number of arguments.
-  const int argc = arguments().immediate();
-
-  // Get the receiver from the stack.
-  __ ldr(r0, MemOperand(sp, argc * kPointerSize));
-
-  // Check that the maps haven't changed.
-  __ JumpIfSmi(r0, miss);
-  CheckPrototypes(
-      IC::CurrentTypeOf(object, isolate()), r0, holder, r3, r1, r4, name, miss);
-}
-
-
 void CallStubCompiler::GenerateLoadFunctionFromCell(
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Label* miss) {
   // Get the value from the cell.
   __ mov(r3, Operand(cell));
   __ ldr(r1, FieldMemOperand(r3, Cell::kValueOffset));
 
   // Check that the cell contains the same function.
   if (heap()->InNewSpace(*function)) {
@@ skipping 23 matching lines @@
                                                kind_,
                                                extra_state_);
   __ Jump(code, RelocInfo::CODE_TARGET);
 }
 
 
 Handle<Code> CallStubCompiler::CompileCallField(Handle<JSObject> object,
                                                 Handle<JSObject> holder,
                                                 PropertyIndex index,
                                                 Handle<Name> name) {
-  // ----------- S t a t e -------------
-  //  -- r2    : name
-  //  -- lr    : return address
-  // -----------------------------------
   Label miss;
 
-  GenerateNameCheck(name, &miss);
-
-  const int argc = arguments().immediate();
-
-  // Get the receiver of the function from the stack into r0.
-  __ ldr(r0, MemOperand(sp, argc * kPointerSize));
-  // Check that the receiver isn't a smi.
-  __ JumpIfSmi(r0, &miss);
-
-  // Do the right check and compute the holder register.
-  Register reg = CheckPrototypes(
-      IC::CurrentTypeOf(object, isolate()),
-      r0, holder, r1, r3, r4, name, &miss);
+  Register reg = HandlerFrontendHeader(
+      object, holder, name, RECEIVER_MAP_CHECK, &miss);
   GenerateFastPropertyLoad(masm(), r1, reg, index.is_inobject(holder),
                            index.translate(holder), Representation::Tagged());
 
   GenerateCallFunction(masm(), object, arguments(), &miss, extra_state_);
 
-  // Handle call cache miss.
-  __ bind(&miss);
-  GenerateMissBranch();
+  HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(Code::FAST, name);
 }
 
 
 Handle<Code> CallStubCompiler::CompileArrayCodeCall(
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name,
     Code::StubType type) {
   Label miss;
 
-  // Check that function is still array
-  const int argc = arguments().immediate();
-  GenerateNameCheck(name, &miss);
-  Register receiver = r1;
-
-  if (cell.is_null()) {
-    __ ldr(receiver, MemOperand(sp, argc * kPointerSize));
-
-    // Check that the receiver isn't a smi.
-    __ JumpIfSmi(receiver, &miss);
-
-    // Check that the maps haven't changed.
-    CheckPrototypes(
-        IC::CurrentTypeOf(object, isolate()), receiver, holder,
-        r3, r0, r4, name, &miss);
-  } else {
+  HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
+  if (!cell.is_null()) {
     ASSERT(cell->value() == *function);
-    GenerateGlobalReceiverCheck(Handle<JSObject>::cast(object), holder, name,
-                                &miss);
     GenerateLoadFunctionFromCell(cell, function, &miss);
   }
 
   Handle<AllocationSite> site = isolate()->factory()->NewAllocationSite();
   site->SetElementsKind(GetInitialFastElementsKind());
   Handle<Cell> site_feedback_cell = isolate()->factory()->NewCell(site);
+  const int argc = arguments().immediate();
   __ mov(r0, Operand(argc));
   __ mov(r2, Operand(site_feedback_cell));
   __ mov(r1, Operand(function));
 
   ArrayConstructorStub stub(isolate());
   __ TailCallStub(&stub);
 
-  __ bind(&miss);
-  GenerateMissBranch();
+  HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(type, name);
 }
 
 
 Handle<Code> CallStubCompiler::CompileArrayPushCall(
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name,
     Code::StubType type) {
-  // ----------- S t a t e -------------
-  //  -- r2    : name
-  //  -- lr    : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero-based)
-  //  -- ...
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
   // If object is not an array or is observed, bail out to regular call.
   if (!object->IsJSArray() ||
       !cell.is_null() ||
       Handle<JSArray>::cast(object)->map()->is_observed()) {
     return Handle<Code>::null();
   }
 
   Label miss;
-  GenerateNameCheck(name, &miss);
 
-  Register receiver = r1;
-  // Get the receiver from the stack
+  HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
+  Register receiver = r0;
+  Register scratch = r1;
+
   const int argc = arguments().immediate();
-  __ ldr(receiver, MemOperand(sp, argc * kPointerSize));
-
-  // Check that the receiver isn't a smi.
-  __ JumpIfSmi(receiver, &miss);
-
-  // Check that the maps haven't changed.
-  CheckPrototypes(
-      IC::CurrentTypeOf(object, isolate()), receiver, holder,
-      r3, r0, r4, name, &miss);
-
   if (argc == 0) {
     // Nothing to do, just return the length.
     __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
     __ Drop(argc + 1);
     __ Ret();
   } else {
     Label call_builtin;
 
     if (argc == 1) {  // Otherwise fall through to call the builtin.
       Label attempt_to_grow_elements, with_write_barrier, check_double;
 
       Register elements = r6;
       Register end_elements = r5;
       // Get the elements array of the object.
       __ ldr(elements, FieldMemOperand(receiver, JSArray::kElementsOffset));
 
       // Check that the elements are in fast mode and writable.
       __ CheckMap(elements,
-                  r0,
+                  scratch,
                   Heap::kFixedArrayMapRootIndex,
                   &check_double,
                   DONT_DO_SMI_CHECK);
 
-      // Get the array's length into r0 and calculate new length.
-      __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
-      __ add(r0, r0, Operand(Smi::FromInt(argc)));
+      // Get the array's length into scratch and calculate new length.
+      __ ldr(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
+      __ add(scratch, scratch, Operand(Smi::FromInt(argc)));
 
       // Get the elements' length.
       __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset));
 
       // Check if we could survive without allocation.
-      __ cmp(r0, r4);
+      __ cmp(scratch, r4);
       __ b(gt, &attempt_to_grow_elements);
 
       // Check if value is a smi.
       __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize));
       __ JumpIfNotSmi(r4, &with_write_barrier);
 
       // Save new length.
-      __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
+      __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
 
       // Store the value.
       // We may need a register containing the address end_elements below,
       // so write back the value in end_elements.
-      __ add(end_elements, elements, Operand::PointerOffsetFromSmiKey(r0));
+      __ add(end_elements, elements, Operand::PointerOffsetFromSmiKey(scratch));
       const int kEndElementsOffset =
           FixedArray::kHeaderSize - kHeapObjectTag - argc * kPointerSize;
       __ str(r4, MemOperand(end_elements, kEndElementsOffset, PreIndex));
 
       // Check for a smi.
       __ Drop(argc + 1);
+      __ mov(r0, scratch);
       __ Ret();
 
       __ bind(&check_double);
 
       // Check that the elements are in fast mode and writable.
       __ CheckMap(elements,
-                  r0,
+                  scratch,
                   Heap::kFixedDoubleArrayMapRootIndex,
                   &call_builtin,
                   DONT_DO_SMI_CHECK);
 
-      // Get the array's length into r0 and calculate new length.
-      __ ldr(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
-      __ add(r0, r0, Operand(Smi::FromInt(argc)));
+      // Get the array's length into scratch and calculate new length.
+      __ ldr(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
+      __ add(scratch, scratch, Operand(Smi::FromInt(argc)));
 
       // Get the elements' length.
       __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset));
 
       // Check if we could survive without allocation.
-      __ cmp(r0, r4);
+      __ cmp(scratch, r4);
       __ b(gt, &call_builtin);
 
       __ ldr(r4, MemOperand(sp, (argc - 1) * kPointerSize));
-      __ StoreNumberToDoubleElements(r4, r0, elements, r5, d0,
+      __ StoreNumberToDoubleElements(r4, scratch, elements, r5, d0,
                                      &call_builtin, argc * kDoubleSize);
 
       // Save new length.
-      __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
+      __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
 
-      // Check for a smi.
       __ Drop(argc + 1);
+      __ mov(r0, scratch);
       __ Ret();
 
       __ bind(&with_write_barrier);
 
       __ ldr(r3, FieldMemOperand(receiver, HeapObject::kMapOffset));
 
       if (FLAG_smi_only_arrays  && !FLAG_trace_elements_transitions) {
         Label fast_object, not_fast_object;
         __ CheckFastObjectElements(r3, r9, &not_fast_object);
         __ jmp(&fast_object);
@@ skipping 30 matching lines @@
         ElementsTransitionGenerator::
             GenerateMapChangeElementsTransition(masm(),
                                                 DONT_TRACK_ALLOCATION_SITE,
                                                 NULL);
         __ bind(&fast_object);
       } else {
         __ CheckFastObjectElements(r3, r3, &call_builtin);
       }
 
       // Save new length.
-      __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
+      __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
 
       // Store the value.
       // We may need a register containing the address end_elements below,
       // so write back the value in end_elements.
-      __ add(end_elements, elements, Operand::PointerOffsetFromSmiKey(r0));
+      __ add(end_elements, elements, Operand::PointerOffsetFromSmiKey(scratch));
       __ str(r4, MemOperand(end_elements, kEndElementsOffset, PreIndex));
 
       __ RecordWrite(elements,
                      end_elements,
                      r4,
                      kLRHasNotBeenSaved,
                      kDontSaveFPRegs,
                      EMIT_REMEMBERED_SET,
                      OMIT_SMI_CHECK);
       __ Drop(argc + 1);
+      __ mov(r0, scratch);
       __ Ret();
 
       __ bind(&attempt_to_grow_elements);
-      // r0: array's length + 1.
+      // scratch: array's length + 1.
 
       if (!FLAG_inline_new) {
         __ b(&call_builtin);
       }
 
       __ ldr(r2, MemOperand(sp, (argc - 1) * kPointerSize));
       // Growing elements that are SMI-only requires special handling in case
       // the new element is non-Smi. For now, delegate to the builtin.
       Label no_fast_elements_check;
       __ JumpIfSmi(r2, &no_fast_elements_check);
       __ ldr(r9, FieldMemOperand(receiver, HeapObject::kMapOffset));
       __ CheckFastObjectElements(r9, r9, &call_builtin);
       __ bind(&no_fast_elements_check);
 
       ExternalReference new_space_allocation_top =
           ExternalReference::new_space_allocation_top_address(isolate());
       ExternalReference new_space_allocation_limit =
           ExternalReference::new_space_allocation_limit_address(isolate());
 
       const int kAllocationDelta = 4;
       // Load top and check if it is the end of elements.
-      __ add(end_elements, elements, Operand::PointerOffsetFromSmiKey(r0));
+      __ add(end_elements, elements, Operand::PointerOffsetFromSmiKey(scratch));
       __ add(end_elements, end_elements, Operand(kEndElementsOffset));
       __ mov(r4, Operand(new_space_allocation_top));
       __ ldr(r3, MemOperand(r4));
       __ cmp(end_elements, r3);
       __ b(ne, &call_builtin);
 
       __ mov(r9, Operand(new_space_allocation_limit));
       __ ldr(r9, MemOperand(r9));
       __ add(r3, r3, Operand(kAllocationDelta * kPointerSize));
       __ cmp(r3, r9);
       __ b(hi, &call_builtin);
 
       // We fit and could grow elements.
       // Update new_space_allocation_top.
       __ str(r3, MemOperand(r4));
       // Push the argument.
       __ str(r2, MemOperand(end_elements));
       // Fill the rest with holes.
       __ LoadRoot(r3, Heap::kTheHoleValueRootIndex);
       for (int i = 1; i < kAllocationDelta; i++) {
         __ str(r3, MemOperand(end_elements, i * kPointerSize));
       }
 
       // Update elements' and array's sizes.
-      __ str(r0, FieldMemOperand(receiver, JSArray::kLengthOffset));
+      __ str(scratch, FieldMemOperand(receiver, JSArray::kLengthOffset));
       __ ldr(r4, FieldMemOperand(elements, FixedArray::kLengthOffset));
       __ add(r4, r4, Operand(Smi::FromInt(kAllocationDelta)));
       __ str(r4, FieldMemOperand(elements, FixedArray::kLengthOffset));
 
       // Elements are in new space, so write barrier is not required.
       __ Drop(argc + 1);
+      __ mov(r0, scratch);
       __ Ret();
     }
     __ bind(&call_builtin);
     __ TailCallExternalReference(
         ExternalReference(Builtins::c_ArrayPush, isolate()), argc + 1, 1);
   }
 
-  // Handle call cache miss.
-  __ bind(&miss);
-  GenerateMissBranch();
+  HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(type, name);
 }
 
 
 Handle<Code> CallStubCompiler::CompileArrayPopCall(
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name,
     Code::StubType type) {
-  // ----------- S t a t e -------------
-  //  -- r2    : name
-  //  -- lr    : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero-based)
-  //  -- ...
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
   // If object is not an array or is observed, bail out to regular call.
   if (!object->IsJSArray() ||
       !cell.is_null() ||
       Handle<JSArray>::cast(object)->map()->is_observed()) {
     return Handle<Code>::null();
   }
 
   Label miss, return_undefined, call_builtin;
-  Register receiver = r1;
+  Register receiver = r0;
+  Register scratch = r1;
   Register elements = r3;
-  GenerateNameCheck(name, &miss);
 
-  // Get the receiver from the stack
-  const int argc = arguments().immediate();
-  __ ldr(receiver, MemOperand(sp, argc * kPointerSize));
-  // Check that the receiver isn't a smi.
-  __ JumpIfSmi(receiver, &miss);
-
-  // Check that the maps haven't changed.
-  CheckPrototypes(IC::CurrentTypeOf(object, isolate()), receiver, holder,
-                  elements, r4, r0, name, &miss);
+  HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
 
   // Get the elements array of the object.
   __ ldr(elements, FieldMemOperand(receiver, JSArray::kElementsOffset));
 
   // Check that the elements are in fast mode and writable.
   __ CheckMap(elements,
-              r0,
+              scratch,
               Heap::kFixedArrayMapRootIndex,
               &call_builtin,
               DONT_DO_SMI_CHECK);
 
   // Get the array's length into r4 and calculate new length.
   __ ldr(r4, FieldMemOperand(receiver, JSArray::kLengthOffset));
   __ sub(r4, r4, Operand(Smi::FromInt(1)), SetCC);
   __ b(lt, &return_undefined);
 
   // Get the last element.
   __ LoadRoot(r6, Heap::kTheHoleValueRootIndex);
   // We can't address the last element in one operation. Compute the more
   // expensive shift first, and use an offset later on.
   __ add(elements, elements, Operand::PointerOffsetFromSmiKey(r4));
-  __ ldr(r0, FieldMemOperand(elements, FixedArray::kHeaderSize));
-  __ cmp(r0, r6);
+  __ ldr(scratch, FieldMemOperand(elements, FixedArray::kHeaderSize));
+  __ cmp(scratch, r6);
   __ b(eq, &call_builtin);
 
   // Set the array's length.
   __ str(r4, FieldMemOperand(receiver, JSArray::kLengthOffset));
 
   // Fill with the hole.
   __ str(r6, FieldMemOperand(elements, FixedArray::kHeaderSize));
+  const int argc = arguments().immediate();
   __ Drop(argc + 1);
+  __ mov(r0, scratch);
   __ Ret();
 
   __ bind(&return_undefined);
   __ LoadRoot(r0, Heap::kUndefinedValueRootIndex);
   __ Drop(argc + 1);
   __ Ret();
 
   __ bind(&call_builtin);
   __ TailCallExternalReference(
       ExternalReference(Builtins::c_ArrayPop, isolate()), argc + 1, 1);
 
-  // Handle call cache miss.
-  __ bind(&miss);
-  GenerateMissBranch();
+  HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(type, name);
 }
 
 
 Handle<Code> CallStubCompiler::CompileStringCharCodeAtCall(
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name,
     Code::StubType type) {
-  // ----------- S t a t e -------------
-  //  -- r2                     : function name
-  //  -- lr                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero-based)
-  //  -- ...
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
   // If object is not a string, bail out to regular call.
   if (!object->IsString() || !cell.is_null()) return Handle<Code>::null();
 
-  const int argc = arguments().immediate();
   Label miss;
   Label name_miss;
   Label index_out_of_range;
   Label* index_out_of_range_label = &index_out_of_range;
 
   if (kind_ == Code::CALL_IC &&
       (CallICBase::StringStubState::decode(extra_state_) ==
        DEFAULT_STRING_STUB)) {
     index_out_of_range_label = &miss;
   }
-  GenerateNameCheck(name, &name_miss);
 
-  // Check that the maps starting from the prototype haven't changed.
-  GenerateDirectLoadGlobalFunctionPrototype(masm(),
-                                            Context::STRING_FUNCTION_INDEX,
-                                            r0,
-                                            &miss);
-  ASSERT(!object.is_identical_to(holder));
-  Handle<JSObject> prototype(JSObject::cast(object->GetPrototype(isolate())));
-  CheckPrototypes(
-      IC::CurrentTypeOf(prototype, isolate()),
-      r0, holder, r1, r3, r4, name, &miss);
+  HandlerFrontendHeader(object, holder, name, STRING_CHECK, &name_miss);
 
-  Register receiver = r1;
+  Register receiver = r0;
   Register index = r4;
-  Register result = r0;
+  Register result = r1;
+  const int argc = arguments().immediate();
   __ ldr(receiver, MemOperand(sp, argc * kPointerSize));
   if (argc > 0) {
     __ ldr(index, MemOperand(sp, (argc - 1) * kPointerSize));
   } else {
     __ LoadRoot(index, Heap::kUndefinedValueRootIndex);
   }
 
   StringCharCodeAtGenerator generator(receiver,
                                       index,
                                       result,
                                       &miss,  // When not a string.
                                       &miss,  // When not a number.
                                       index_out_of_range_label,
                                       STRING_INDEX_IS_NUMBER);
   generator.GenerateFast(masm());
   __ Drop(argc + 1);
+  __ mov(r0, result);
   __ Ret();
 
   StubRuntimeCallHelper call_helper;
   generator.GenerateSlow(masm(), call_helper);
 
   if (index_out_of_range.is_linked()) {
     __ bind(&index_out_of_range);
     __ LoadRoot(r0, Heap::kNanValueRootIndex);
     __ Drop(argc + 1);
     __ Ret();
@@ skipping 10 matching lines @@
 }
 
 
 Handle<Code> CallStubCompiler::CompileStringCharAtCall(
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name,
     Code::StubType type) {
-  // ----------- S t a t e -------------
-  //  -- r2                     : function name
-  //  -- lr                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero-based)
-  //  -- ...
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
   // If object is not a string, bail out to regular call.
   if (!object->IsString() || !cell.is_null()) return Handle<Code>::null();
 
   const int argc = arguments().immediate();
   Label miss;
   Label name_miss;
   Label index_out_of_range;
   Label* index_out_of_range_label = &index_out_of_range;
   if (kind_ == Code::CALL_IC &&
       (CallICBase::StringStubState::decode(extra_state_) ==
        DEFAULT_STRING_STUB)) {
     index_out_of_range_label = &miss;
   }
-  GenerateNameCheck(name, &name_miss);
 
-  // Check that the maps starting from the prototype haven't changed.
-  GenerateDirectLoadGlobalFunctionPrototype(masm(),
-                                            Context::STRING_FUNCTION_INDEX,
-                                            r0,
-                                            &miss);
-  ASSERT(!object.is_identical_to(holder));
-  Handle<JSObject> prototype(JSObject::cast(object->GetPrototype(isolate())));
-  CheckPrototypes(
-      IC::CurrentTypeOf(prototype, isolate()),
-      r0, holder, r1, r3, r4, name, &miss);
+  HandlerFrontendHeader(object, holder, name, STRING_CHECK, &name_miss);
 
   Register receiver = r0;
   Register index = r4;
   Register scratch = r3;
-  Register result = r0;
-  __ ldr(receiver, MemOperand(sp, argc * kPointerSize));
+  Register result = r1;
   if (argc > 0) {
     __ ldr(index, MemOperand(sp, (argc - 1) * kPointerSize));
   } else {
     __ LoadRoot(index, Heap::kUndefinedValueRootIndex);
   }
 
   StringCharAtGenerator generator(receiver,
                                   index,
                                   scratch,
                                   result,
                                   &miss,  // When not a string.
                                   &miss,  // When not a number.
                                   index_out_of_range_label,
                                   STRING_INDEX_IS_NUMBER);
   generator.GenerateFast(masm());
   __ Drop(argc + 1);
+  __ mov(r0, result);
   __ Ret();
 
   StubRuntimeCallHelper call_helper;
   generator.GenerateSlow(masm(), call_helper);
 
   if (index_out_of_range.is_linked()) {
     __ bind(&index_out_of_range);
     __ LoadRoot(r0, Heap::kempty_stringRootIndex);
     __ Drop(argc + 1);
     __ Ret();
@@ skipping 10 matching lines @@
 }
 
 
 Handle<Code> CallStubCompiler::CompileStringFromCharCodeCall(
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name,
     Code::StubType type) {
-  // ----------- S t a t e -------------
-  //  -- r2                     : function name
-  //  -- lr                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero-based)
-  //  -- ...
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
   const int argc = arguments().immediate();
 
   // If the object is not a JSObject or we got an unexpected number of
   // arguments, bail out to the regular call.
   if (!object->IsJSObject() || argc != 1) return Handle<Code>::null();
 
   Label miss;
-  GenerateNameCheck(name, &miss);
 
-  if (cell.is_null()) {
-    __ ldr(r1, MemOperand(sp, 1 * kPointerSize));
-
-    __ JumpIfSmi(r1, &miss);
-
-    CheckPrototypes(
-        IC::CurrentTypeOf(object, isolate()),
-        r1, holder, r0, r3, r4, name, &miss);
-  } else {
+  HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
+  if (!cell.is_null()) {
     ASSERT(cell->value() == *function);
-    GenerateGlobalReceiverCheck(Handle<JSObject>::cast(object), holder, name,
-                                &miss);
     GenerateLoadFunctionFromCell(cell, function, &miss);
   }
 
   // Load the char code argument.
   Register code = r1;
   __ ldr(code, MemOperand(sp, 0 * kPointerSize));
 
   // Check the code is a smi.
   Label slow;
   __ JumpIfNotSmi(code, &slow);
 
   // Convert the smi code to uint16.
   __ and_(code, code, Operand(Smi::FromInt(0xffff)));
 
   StringCharFromCodeGenerator generator(code, r0);
   generator.GenerateFast(masm());
   __ Drop(argc + 1);
   __ Ret();
 
   StubRuntimeCallHelper call_helper;
   generator.GenerateSlow(masm(), call_helper);
 
   // Tail call the full function. We do not have to patch the receiver
   // because the function makes no use of it.
   __ bind(&slow);
   ParameterCount expected(function);
   __ InvokeFunction(function, expected, arguments(),
                     JUMP_FUNCTION, NullCallWrapper(), CALL_AS_METHOD);
 
-  __ bind(&miss);
-  // r2: function name.
-  GenerateMissBranch();
+  HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(type, name);
 }
 
 
 Handle<Code> CallStubCompiler::CompileMathFloorCall(
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name,
     Code::StubType type) {
-  // ----------- S t a t e -------------
-  //  -- r2                     : function name
-  //  -- lr                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero-based)
-  //  -- ...
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
   const int argc = arguments().immediate();
   // If the object is not a JSObject or we got an unexpected number of
   // arguments, bail out to the regular call.
   if (!object->IsJSObject() || argc != 1) return Handle<Code>::null();
 
   Label miss, slow;
-  GenerateNameCheck(name, &miss);
 
-  if (cell.is_null()) {
-    __ ldr(r1, MemOperand(sp, 1 * kPointerSize));
-    __ JumpIfSmi(r1, &miss);
-    CheckPrototypes(
-        IC::CurrentTypeOf(object, isolate()),
-        r1, holder, r0, r3, r4, name, &miss);
-  } else {
+  HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
+  if (!cell.is_null()) {
     ASSERT(cell->value() == *function);
-    GenerateGlobalReceiverCheck(Handle<JSObject>::cast(object), holder, name,
-                                &miss);
     GenerateLoadFunctionFromCell(cell, function, &miss);
   }
 
   // Load the (only) argument into r0.
   __ ldr(r0, MemOperand(sp, 0 * kPointerSize));
 
   // If the argument is a smi, just return.
   __ SmiTst(r0);
   __ Drop(argc + 1, eq);
   __ Ret(eq);
@@ skipping 48 matching lines @@
   __ Drop(argc + 1);
   __ Ret();
 
   __ bind(&slow);
   // Tail call the full function. We do not have to patch the receiver
   // because the function makes no use of it.
   ParameterCount expected(function);
   __ InvokeFunction(function, expected, arguments(),
                     JUMP_FUNCTION, NullCallWrapper(), CALL_AS_METHOD);
 
-  __ bind(&miss);
-  // r2: function name.
-  GenerateMissBranch();
+  HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(type, name);
 }
 
 
 Handle<Code> CallStubCompiler::CompileMathAbsCall(
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Cell> cell,
     Handle<JSFunction> function,
     Handle<String> name,
     Code::StubType type) {
-  // ----------- S t a t e -------------
-  //  -- r2                     : function name
-  //  -- lr                     : return address
-  //  -- sp[(argc - n - 1) * 4] : arg[n] (zero-based)
-  //  -- ...
-  //  -- sp[argc * 4]           : receiver
-  // -----------------------------------
-
   const int argc = arguments().immediate();
   // If the object is not a JSObject or we got an unexpected number of
   // arguments, bail out to the regular call.
   if (!object->IsJSObject() || argc != 1) return Handle<Code>::null();
 
   Label miss;
-  GenerateNameCheck(name, &miss);
-  if (cell.is_null()) {
-    __ ldr(r1, MemOperand(sp, 1 * kPointerSize));
-    __ JumpIfSmi(r1, &miss);
-    CheckPrototypes(
-        IC::CurrentTypeOf(object, isolate()),
-        r1, holder, r0, r3, r4, name, &miss);
-  } else {
+
+  HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
+  if (!cell.is_null()) {
     ASSERT(cell->value() == *function);
-    GenerateGlobalReceiverCheck(Handle<JSObject>::cast(object), holder, name,
-                                &miss);
     GenerateLoadFunctionFromCell(cell, function, &miss);
   }
 
   // Load the (only) argument into r0.
   __ ldr(r0, MemOperand(sp, 0 * kPointerSize));
 
   // Check if the argument is a smi.
   Label not_smi;
   __ JumpIfNotSmi(r0, &not_smi);
 
@@ skipping 39 matching lines @@
   __ Drop(argc + 1);
   __ Ret();
 
   // Tail call the full function. We do not have to patch the receiver
   // because the function makes no use of it.
   __ bind(&slow);
   ParameterCount expected(function);
   __ InvokeFunction(function, expected, arguments(),
                     JUMP_FUNCTION, NullCallWrapper(), CALL_AS_METHOD);
 
-  __ bind(&miss);
-  // r2: function name.
-  GenerateMissBranch();
+  HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(type, name);
 }
 
 
 Handle<Code> CallStubCompiler::CompileFastApiCall(
     const CallOptimization& optimization,
     Handle<Object> object,
     Handle<JSObject> holder,
@@ skipping 51 matching lines @@
   __ LoadRoot(ip, Heap::kTrueValueRootIndex);
   __ cmp(object, ip);
   __ b(eq, &success);
   __ LoadRoot(ip, Heap::kFalseValueRootIndex);
   __ cmp(object, ip);
   __ b(ne, miss);
   __ bind(&success);
 }
 
 
-void CallStubCompiler::CompileHandlerFrontend(Handle<Object> object,
-                                              Handle<JSObject> holder,
-                                              Handle<Name> name,
-                                              CheckType check) {
+void CallStubCompiler::PatchGlobalProxy(Handle<Object> object) {
+  if (object->IsGlobalObject()) {
+    const int argc = arguments().immediate();
+    const int receiver_offset = argc * kPointerSize;
+    __ ldr(r3, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
+    __ str(r3, MemOperand(sp, receiver_offset));
+  }
+}
+
+
+Register CallStubCompiler::HandlerFrontendHeader(Handle<Object> object,
+                                                 Handle<JSObject> holder,
+                                                 Handle<Name> name,
+                                                 CheckType check,
+                                                 Label* miss) {
   // ----------- S t a t e -------------
   //  -- r2    : name
   //  -- lr    : return address
   // -----------------------------------
-  Label miss;
-  GenerateNameCheck(name, &miss);
+  GenerateNameCheck(name, miss);
+
+  Register reg = r0;
 
   // Get the receiver from the stack
   const int argc = arguments().immediate();
-  __ ldr(r1, MemOperand(sp, argc * kPointerSize));
+  const int receiver_offset = argc * kPointerSize;
+  __ ldr(r0, MemOperand(sp, receiver_offset));
 
   // Check that the receiver isn't a smi.
   if (check != NUMBER_CHECK) {
-    __ JumpIfSmi(r1, &miss);
+    __ JumpIfSmi(r0, miss);
   }
 
   // Make sure that it's okay not to patch the on stack receiver
   // unless we're doing a receiver map check.
   ASSERT(!object->IsGlobalObject() || check == RECEIVER_MAP_CHECK);
   switch (check) {
     case RECEIVER_MAP_CHECK:
-      __ IncrementCounter(isolate()->counters()->call_const(), 1, r0, r3);
+      __ IncrementCounter(isolate()->counters()->call_const(), 1, r1, r3);
 
       // Check that the maps haven't changed.
-      CheckPrototypes(
+      reg = CheckPrototypes(
           IC::CurrentTypeOf(object, isolate()),
-          r1, holder, r0, r3, r4, name, &miss);
-
-      // Patch the receiver on the stack with the global proxy if
-      // necessary.
-      if (object->IsGlobalObject()) {
-        __ ldr(r3, FieldMemOperand(r1, GlobalObject::kGlobalReceiverOffset));
-        __ str(r3, MemOperand(sp, argc * kPointerSize));
-      }
+          reg, holder, r1, r3, r4, name, miss);
       break;
 
     case STRING_CHECK: {
       // Check that the object is a string.
-      __ CompareObjectType(r1, r3, r3, FIRST_NONSTRING_TYPE);
-      __ b(ge, &miss);
+      __ CompareObjectType(reg, r3, r3, FIRST_NONSTRING_TYPE);
+      __ b(ge, miss);
       // Check that the maps starting from the prototype haven't changed.
       GenerateDirectLoadGlobalFunctionPrototype(
-          masm(), Context::STRING_FUNCTION_INDEX, r0, &miss);
-      Handle<Object> prototype(object->GetPrototype(isolate()), isolate());
-      CheckPrototypes(
-          IC::CurrentTypeOf(prototype, isolate()),
-          r0, holder, r3, r1, r4, name, &miss);
+          masm(), Context::STRING_FUNCTION_INDEX, r1, miss);
       break;
     }
     case SYMBOL_CHECK: {
       // Check that the object is a symbol.
-      __ CompareObjectType(r1, r1, r3, SYMBOL_TYPE);
-      __ b(ne, &miss);
+      __ CompareObjectType(reg, r3, r3, SYMBOL_TYPE);
+      __ b(ne, miss);
       // Check that the maps starting from the prototype haven't changed.
       GenerateDirectLoadGlobalFunctionPrototype(
-          masm(), Context::SYMBOL_FUNCTION_INDEX, r0, &miss);
-      Handle<Object> prototype(object->GetPrototype(isolate()), isolate());
-      CheckPrototypes(
-          IC::CurrentTypeOf(prototype, isolate()),
-          r0, holder, r3, r1, r4, name, &miss);
+          masm(), Context::SYMBOL_FUNCTION_INDEX, r1, miss);
       break;
     }
     case NUMBER_CHECK: {
       Label fast;
       // Check that the object is a smi or a heap number.
-      __ JumpIfSmi(r1, &fast);
-      __ CompareObjectType(r1, r0, r0, HEAP_NUMBER_TYPE);
-      __ b(ne, &miss);
+      __ JumpIfSmi(reg, &fast);
+      __ CompareObjectType(reg, r3, r3, HEAP_NUMBER_TYPE);
+      __ b(ne, miss);
       __ bind(&fast);
       // Check that the maps starting from the prototype haven't changed.
       GenerateDirectLoadGlobalFunctionPrototype(
-          masm(), Context::NUMBER_FUNCTION_INDEX, r0, &miss);
-      Handle<Object> prototype(object->GetPrototype(isolate()), isolate());
-      CheckPrototypes(
-          IC::CurrentTypeOf(prototype, isolate()),
-          r0, holder, r3, r1, r4, name, &miss);
+          masm(), Context::NUMBER_FUNCTION_INDEX, r1, miss);
       break;
     }
     case BOOLEAN_CHECK: {
-      GenerateBooleanCheck(r1, &miss);
+      GenerateBooleanCheck(reg, miss);
 
       // Check that the maps starting from the prototype haven't changed.
       GenerateDirectLoadGlobalFunctionPrototype(
-          masm(), Context::BOOLEAN_FUNCTION_INDEX, r0, &miss);
-      Handle<Object> prototype(object->GetPrototype(isolate()), isolate());
-      CheckPrototypes(
-          IC::CurrentTypeOf(prototype, isolate()),
-          r0, holder, r3, r1, r4, name, &miss);
+          masm(), Context::BOOLEAN_FUNCTION_INDEX, r1, miss);
       break;
     }
   }
 
-  Label success;
-  __ b(&success);
+  if (check != RECEIVER_MAP_CHECK) {
+    Handle<Object> prototype(object->GetPrototype(isolate()), isolate());
+    reg = CheckPrototypes(
+        IC::CurrentTypeOf(prototype, isolate()),
+        r1, holder, r1, r3, r4, name, miss);
+  }
 
-  // Handle call cache miss.
-  __ bind(&miss);
-  GenerateMissBranch();
-
-  __ bind(&success);
+  return reg;
 }
 
 
 void CallStubCompiler::CompileHandlerBackend(Handle<JSFunction> function) {
   CallKind call_kind = CallICBase::Contextual::decode(extra_state_)
       ? CALL_AS_FUNCTION
       : CALL_AS_METHOD;
   ParameterCount expected(function);
   __ InvokeFunction(function, expected, arguments(),
                     JUMP_FUNCTION, NullCallWrapper(), call_kind);
 }
 
 
 Handle<Code> CallStubCompiler::CompileCallConstant(
     Handle<Object> object,
     Handle<JSObject> holder,
     Handle<Name> name,
     CheckType check,
     Handle<JSFunction> function) {
   if (HasCustomCallGenerator(function)) {
     Handle<Code> code = CompileCustomCall(object, holder,
                                           Handle<Cell>::null(),
                                           function, Handle<String>::cast(name),
                                           Code::FAST);
     // A null handle means bail out to the regular compiler code below.
     if (!code.is_null()) return code;
   }
 
-  CompileHandlerFrontend(object, holder, name, check);
+  Label miss;
+  HandlerFrontendHeader(object, holder, name, check, &miss);
+  PatchGlobalProxy(object);
   CompileHandlerBackend(function);
+  HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(function);
 }
 
 
 Handle<Code> CallStubCompiler::CompileCallInterceptor(Handle<JSObject> object,
                                                       Handle<JSObject> holder,
                                                       Handle<Name> name) {
-  // ----------- S t a t e -------------
-  //  -- r2    : name
-  //  -- lr    : return address
-  // -----------------------------------
   Label miss;
   GenerateNameCheck(name, &miss);
 
   // Get the number of arguments.
   const int argc = arguments().immediate();
   LookupResult lookup(isolate());
   LookupPostInterceptor(holder, name, &lookup);
 
   // Get the receiver from the stack.
   __ ldr(r1, MemOperand(sp, argc * kPointerSize));
@@ skipping 17 matching lines @@
   return GetCode(Code::FAST, name);
 }
 
 
 Handle<Code> CallStubCompiler::CompileCallGlobal(
     Handle<JSObject> object,
     Handle<GlobalObject> holder,
     Handle<PropertyCell> cell,
     Handle<JSFunction> function,
     Handle<Name> name) {
-  // ----------- S t a t e -------------
-  //  -- r2    : name
-  //  -- lr    : return address
-  // -----------------------------------
   if (HasCustomCallGenerator(function)) {
     Handle<Code> code = CompileCustomCall(
         object, holder, cell, function, Handle<String>::cast(name),
         Code::NORMAL);
     // A null handle means bail out to the regular compiler code below.
     if (!code.is_null()) return code;
   }
 
   Label miss;
-  GenerateNameCheck(name, &miss);
-
-  // Get the number of arguments.
-  const int argc = arguments().immediate();
-  GenerateGlobalReceiverCheck(object, holder, name, &miss);
+  HandlerFrontendHeader(object, holder, name, RECEIVER_MAP_CHECK, &miss);
   GenerateLoadFunctionFromCell(cell, function, &miss);
-
-  // Patch the receiver on the stack with the global proxy if
-  // necessary.
-  if (object->IsGlobalObject()) {
-    __ ldr(r3, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
-    __ str(r3, MemOperand(sp, argc * kPointerSize));
-  }
+  PatchGlobalProxy(object);
 
   // Set up the context (function already in r1).
   __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
 
   // Jump to the cached code (tail call).
   Counters* counters = isolate()->counters();
   __ IncrementCounter(counters->call_global_inline(), 1, r3, r4);
   ParameterCount expected(function->shared()->formal_parameter_count());
   CallKind call_kind = CallICBase::Contextual::decode(extra_state_)
       ? CALL_AS_FUNCTION
       : CALL_AS_METHOD;
   // We call indirectly through the code field in the function to
   // allow recompilation to take effect without changing any of the
   // call sites.
   __ ldr(r3, FieldMemOperand(r1, JSFunction::kCodeEntryOffset));
   __ InvokeCode(r3, expected, arguments(), JUMP_FUNCTION,
                 NullCallWrapper(), call_kind);
 
-  // Handle call cache miss.
-  __ bind(&miss);
-  __ IncrementCounter(counters->call_global_inline_miss(), 1, r1, r3);
-  GenerateMissBranch();
+  HandlerFrontendFooter(&miss);
 
   // Return the generated code.
   return GetCode(Code::NORMAL, name);
 }
 
 
 Handle<Code> StoreStubCompiler::CompileStoreCallback(
     Handle<JSObject> object,
     Handle<JSObject> holder,
     Handle<Name> name,
@@ skipping 373 matching lines @@
   // -----------------------------------
   TailCallBuiltin(masm, Builtins::kKeyedLoadIC_Miss);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM