Add asserts to ensure that we:

src/arm/builtins-arm.cc

 // Copyright 2011 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 564 matching lines @@
   __ tst(r3, Operand(kIsNotStringMask));
   __ b(ne, &convert_argument);
   __ mov(argument, r0);
   __ IncrementCounter(counters->string_ctor_conversions(), 1, r3, r4);
   __ b(&argument_is_string);
 
   // Invoke the conversion builtin and put the result into r2.
   __ bind(&convert_argument);
   __ push(function);  // Preserve the function.
   __ IncrementCounter(counters->string_ctor_conversions(), 1, r3, r4);
-  __ EnterInternalFrame();
-  __ push(r0);
-  __ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION);
-  __ LeaveInternalFrame();
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ push(r0);
+    __ InvokeBuiltin(Builtins::TO_STRING, CALL_FUNCTION);
+  }
   __ pop(function);
   __ mov(argument, r0);
   __ b(&argument_is_string);
 
   // Load the empty string into r2, remove the receiver from the
   // stack, and jump back to the case where the argument is a string.
   __ bind(&no_arguments);
   __ LoadRoot(argument, Heap::kEmptyStringRootIndex);
   __ Drop(1);
   __ b(&argument_is_string);
 
   // At this point the argument is already a string. Call runtime to
   // create a string wrapper.
   __ bind(&gc_required);
   __ IncrementCounter(counters->string_ctor_gc_required(), 1, r3, r4);
-  __ EnterInternalFrame();
-  __ push(argument);
-  __ CallRuntime(Runtime::kNewStringWrapper, 1);
-  __ LeaveInternalFrame();
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ push(argument);
+    __ CallRuntime(Runtime::kNewStringWrapper, 1);
+  }
   __ Ret();
 }
 
 
 void Builtins::Generate_JSConstructCall(MacroAssembler* masm) {
   // ----------- S t a t e -------------
   //  -- r0     : number of arguments
   //  -- r1     : constructor function
   //  -- lr     : return address
   //  -- sp[...]: constructor arguments
@@ skipping 25 matching lines @@
 
 static void Generate_JSConstructStubHelper(MacroAssembler* masm,
                                            bool is_api_function,
                                            bool count_constructions) {
   // Should never count constructions for api objects.
   ASSERT(!is_api_function || !count_constructions);
 
   Isolate* isolate = masm->isolate();
 
   // Enter a construct frame.
-  __ EnterConstructFrame();
-
-  // Preserve the two incoming parameters on the stack.
-  __ mov(r0, Operand(r0, LSL, kSmiTagSize));
-  __ push(r0);  // Smi-tagged arguments count.
-  __ push(r1);  // Constructor function.
-
-  // Try to allocate the object without transitioning into C code. If any of the
-  // preconditions is not met, the code bails out to the runtime call.
-  Label rt_call, allocated;
-  if (FLAG_inline_new) {
-    Label undo_allocation;
+  {
+    FrameScope scope(masm, StackFrame::CONSTRUCT);
+
+    // Preserve the two incoming parameters on the stack.
+    __ mov(r0, Operand(r0, LSL, kSmiTagSize));
+    __ push(r0);  // Smi-tagged arguments count.
+    __ push(r1);  // Constructor function.
+
+    // Try to allocate the object without transitioning into C code. If any of
+    // the preconditions is not met, the code bails out to the runtime call.
+    Label rt_call, allocated;
+    if (FLAG_inline_new) {
+      Label undo_allocation;
 #ifdef ENABLE_DEBUGGER_SUPPORT
-    ExternalReference debug_step_in_fp =
-        ExternalReference::debug_step_in_fp_address(isolate);
-    __ mov(r2, Operand(debug_step_in_fp));
-    __ ldr(r2, MemOperand(r2));
-    __ tst(r2, r2);
-    __ b(ne, &rt_call);
+      ExternalReference debug_step_in_fp =
+          ExternalReference::debug_step_in_fp_address(isolate);
+      __ mov(r2, Operand(debug_step_in_fp));
+      __ ldr(r2, MemOperand(r2));
+      __ tst(r2, r2);
+      __ b(ne, &rt_call);
 #endif
 
-    // Load the initial map and verify that it is in fact a map.
+      // Load the initial map and verify that it is in fact a map.
+      // r1: constructor function
+      __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset));
+      __ JumpIfSmi(r2, &rt_call);
+      __ CompareObjectType(r2, r3, r4, MAP_TYPE);
+      __ b(ne, &rt_call);
+
+      // Check that the constructor is not constructing a JSFunction (see
+      // comments in Runtime_NewObject in runtime.cc). In which case the
+      // initial map's instance type would be JS_FUNCTION_TYPE.
+      // r1: constructor function
+      // r2: initial map
+      __ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE);
+      __ b(eq, &rt_call);
+
+      if (count_constructions) {
+        Label allocate;
+        // Decrease generous allocation count.
+        __ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
+        MemOperand constructor_count =
+            FieldMemOperand(r3, SharedFunctionInfo::kConstructionCountOffset);
+        __ ldrb(r4, constructor_count);
+        __ sub(r4, r4, Operand(1), SetCC);
+        __ strb(r4, constructor_count);
+        __ b(ne, &allocate);
+
+        __ Push(r1, r2);
+
+        __ push(r1);  // constructor
+        // The call will replace the stub, so the countdown is only done once.
+        __ CallRuntime(Runtime::kFinalizeInstanceSize, 1);
+
+        __ pop(r2);
+        __ pop(r1);
+
+        __ bind(&allocate);
+      }
+
+      // Now allocate the JSObject on the heap.
+      // r1: constructor function
+      // r2: initial map
+      __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset));
+      __ AllocateInNewSpace(r3, r4, r5, r6, &rt_call, SIZE_IN_WORDS);
+
+      // Allocated the JSObject, now initialize the fields. Map is set to
+      // initial map and properties and elements are set to empty fixed array.
+      // r1: constructor function
+      // r2: initial map
+      // r3: object size
+      // r4: JSObject (not tagged)
+      __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex);
+      __ mov(r5, r4);
+      ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
+      __ str(r2, MemOperand(r5, kPointerSize, PostIndex));
+      ASSERT_EQ(1 * kPointerSize, JSObject::kPropertiesOffset);
+      __ str(r6, MemOperand(r5, kPointerSize, PostIndex));
+      ASSERT_EQ(2 * kPointerSize, JSObject::kElementsOffset);
+      __ str(r6, MemOperand(r5, kPointerSize, PostIndex));
+
+      // Fill all the in-object properties with the appropriate filler.
+      // r1: constructor function
+      // r2: initial map
+      // r3: object size (in words)
+      // r4: JSObject (not tagged)
+      // r5: First in-object property of JSObject (not tagged)
+      __ add(r6, r4, Operand(r3, LSL, kPointerSizeLog2));  // End of object.
+      ASSERT_EQ(3 * kPointerSize, JSObject::kHeaderSize);
+      { Label loop, entry;
+        if (count_constructions) {
+          // To allow for truncation.
+          __ LoadRoot(r7, Heap::kOnePointerFillerMapRootIndex);
+        } else {
+          __ LoadRoot(r7, Heap::kUndefinedValueRootIndex);
+        }
+        __ b(&entry);
+        __ bind(&loop);
+        __ str(r7, MemOperand(r5, kPointerSize, PostIndex));
+        __ bind(&entry);
+        __ cmp(r5, r6);
+        __ b(lt, &loop);
+      }
+
+      // Add the object tag to make the JSObject real, so that we can continue
+      // and jump into the continuation code at any time from now on. Any
+      // failures need to undo the allocation, so that the heap is in a
+      // consistent state and verifiable.
+      __ add(r4, r4, Operand(kHeapObjectTag));
+
+      // Check if a non-empty properties array is needed. Continue with
+      // allocated object if not fall through to runtime call if it is.
+      // r1: constructor function
+      // r4: JSObject
+      // r5: start of next object (not tagged)
+      __ ldrb(r3, FieldMemOperand(r2, Map::kUnusedPropertyFieldsOffset));
+      // The field instance sizes contains both pre-allocated property fields
+      // and in-object properties.
+      __ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset));
+      __ Ubfx(r6, r0, Map::kPreAllocatedPropertyFieldsByte * 8, 8);
+      __ add(r3, r3, Operand(r6));
+      __ Ubfx(r6, r0, Map::kInObjectPropertiesByte * 8, 8);
+      __ sub(r3, r3, Operand(r6), SetCC);
+
+      // Done if no extra properties are to be allocated.
+      __ b(eq, &allocated);
+      __ Assert(pl, "Property allocation count failed.");
+
+      // Scale the number of elements by pointer size and add the header for
+      // FixedArrays to the start of the next object calculation from above.
+      // r1: constructor
+      // r3: number of elements in properties array
+      // r4: JSObject
+      // r5: start of next object
+      __ add(r0, r3, Operand(FixedArray::kHeaderSize / kPointerSize));
+      __ AllocateInNewSpace(
+          r0,
+          r5,
+          r6,
+          r2,
+          &undo_allocation,
+          static_cast<AllocationFlags>(RESULT_CONTAINS_TOP | SIZE_IN_WORDS));
+
+      // Initialize the FixedArray.
+      // r1: constructor
+      // r3: number of elements in properties array
+      // r4: JSObject
+      // r5: FixedArray (not tagged)
+      __ LoadRoot(r6, Heap::kFixedArrayMapRootIndex);
+      __ mov(r2, r5);
+      ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
+      __ str(r6, MemOperand(r2, kPointerSize, PostIndex));
+      ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset);
+      __ mov(r0, Operand(r3, LSL, kSmiTagSize));
+      __ str(r0, MemOperand(r2, kPointerSize, PostIndex));
+
+      // Initialize the fields to undefined.
+      // r1: constructor function
+      // r2: First element of FixedArray (not tagged)
+      // r3: number of elements in properties array
+      // r4: JSObject
+      // r5: FixedArray (not tagged)
+      __ add(r6, r2, Operand(r3, LSL, kPointerSizeLog2));  // End of object.
+      ASSERT_EQ(2 * kPointerSize, FixedArray::kHeaderSize);
+      { Label loop, entry;
+        if (count_constructions) {
+          __ LoadRoot(r7, Heap::kUndefinedValueRootIndex);
+        } else if (FLAG_debug_code) {
+          __ LoadRoot(r8, Heap::kUndefinedValueRootIndex);
+          __ cmp(r7, r8);
+          __ Assert(eq, "Undefined value not loaded.");
+        }
+        __ b(&entry);
+        __ bind(&loop);
+        __ str(r7, MemOperand(r2, kPointerSize, PostIndex));
+        __ bind(&entry);
+        __ cmp(r2, r6);
+        __ b(lt, &loop);
+      }
+
+      // Store the initialized FixedArray into the properties field of
+      // the JSObject
+      // r1: constructor function
+      // r4: JSObject
+      // r5: FixedArray (not tagged)
+      __ add(r5, r5, Operand(kHeapObjectTag));  // Add the heap tag.
+      __ str(r5, FieldMemOperand(r4, JSObject::kPropertiesOffset));
+
+      // Continue with JSObject being successfully allocated
+      // r1: constructor function
+      // r4: JSObject
+      __ jmp(&allocated);
+
+      // Undo the setting of the new top so that the heap is verifiable. For
+      // example, the map's unused properties potentially do not match the
+      // allocated objects unused properties.
+      // r4: JSObject (previous new top)
+      __ bind(&undo_allocation);
+      __ UndoAllocationInNewSpace(r4, r5);
+    }
+
+    // Allocate the new receiver object using the runtime call.
     // r1: constructor function
-    __ ldr(r2, FieldMemOperand(r1, JSFunction::kPrototypeOrInitialMapOffset));
-    __ JumpIfSmi(r2, &rt_call);
-    __ CompareObjectType(r2, r3, r4, MAP_TYPE);
-    __ b(ne, &rt_call);
-
-    // Check that the constructor is not constructing a JSFunction (see comments
-    // in Runtime_NewObject in runtime.cc). In which case the initial map's
-    // instance type would be JS_FUNCTION_TYPE.
+    __ bind(&rt_call);
+    __ push(r1);  // argument for Runtime_NewObject
+    __ CallRuntime(Runtime::kNewObject, 1);
+    __ mov(r4, r0);
+
+    // Receiver for constructor call allocated.
+    // r4: JSObject
+    __ bind(&allocated);
+    __ push(r4);
+
+    // Push the function and the allocated receiver from the stack.
+    // sp[0]: receiver (newly allocated object)
+    // sp[1]: constructor function
+    // sp[2]: number of arguments (smi-tagged)
+    __ ldr(r1, MemOperand(sp, kPointerSize));
+    __ push(r1);  // Constructor function.
+    __ push(r4);  // Receiver.
+
+    // Reload the number of arguments from the stack.
     // r1: constructor function
-    // r2: initial map
-    __ CompareInstanceType(r2, r3, JS_FUNCTION_TYPE);
-    __ b(eq, &rt_call);
-
-    if (count_constructions) {
-      Label allocate;
-      // Decrease generous allocation count.
-      __ ldr(r3, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
-      MemOperand constructor_count =
-          FieldMemOperand(r3, SharedFunctionInfo::kConstructionCountOffset);
-      __ ldrb(r4, constructor_count);
-      __ sub(r4, r4, Operand(1), SetCC);
-      __ strb(r4, constructor_count);
-      __ b(ne, &allocate);
-
-      __ Push(r1, r2);
-
-      __ push(r1);  // constructor
-      // The call will replace the stub, so the countdown is only done once.
-      __ CallRuntime(Runtime::kFinalizeInstanceSize, 1);
-
-      __ pop(r2);
-      __ pop(r1);
-
-      __ bind(&allocate);
+    // sp[0]: receiver
+    // sp[1]: constructor function
+    // sp[2]: receiver
+    // sp[3]: constructor function
+    // sp[4]: number of arguments (smi-tagged)
+    __ ldr(r3, MemOperand(sp, 4 * kPointerSize));
+
+    // Setup pointer to last argument.
+    __ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset));
+
+    // Setup number of arguments for function call below
+    __ mov(r0, Operand(r3, LSR, kSmiTagSize));
+
+    // Copy arguments and receiver to the expression stack.
+    // r0: number of arguments
+    // r2: address of last argument (caller sp)
+    // r1: constructor function
+    // r3: number of arguments (smi-tagged)
+    // sp[0]: receiver
+    // sp[1]: constructor function
+    // sp[2]: receiver
+    // sp[3]: constructor function
+    // sp[4]: number of arguments (smi-tagged)
+    Label loop, entry;
+    __ b(&entry);
+    __ bind(&loop);
+    __ ldr(ip, MemOperand(r2, r3, LSL, kPointerSizeLog2 - 1));
+    __ push(ip);
+    __ bind(&entry);
+    __ sub(r3, r3, Operand(2), SetCC);
+    __ b(ge, &loop);
+
+    // Call the function.
+    // r0: number of arguments
+    // r1: constructor function
+    if (is_api_function) {
+      __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
+      Handle<Code> code =
+          masm->isolate()->builtins()->HandleApiCallConstruct();
+      ParameterCount expected(0);
+      __ InvokeCode(code, expected, expected,
+                    RelocInfo::CODE_TARGET, CALL_FUNCTION, CALL_AS_METHOD);
+    } else {
+      ParameterCount actual(r0);
+      __ InvokeFunction(r1, actual, CALL_FUNCTION,
+                        NullCallWrapper(), CALL_AS_METHOD);
     }
 
-    // Now allocate the JSObject on the heap.
-    // r1: constructor function
-    // r2: initial map
-    __ ldrb(r3, FieldMemOperand(r2, Map::kInstanceSizeOffset));
-    __ AllocateInNewSpace(r3, r4, r5, r6, &rt_call, SIZE_IN_WORDS);
-
-    // Allocated the JSObject, now initialize the fields. Map is set to initial
-    // map and properties and elements are set to empty fixed array.
-    // r1: constructor function
-    // r2: initial map
-    // r3: object size
-    // r4: JSObject (not tagged)
-    __ LoadRoot(r6, Heap::kEmptyFixedArrayRootIndex);
-    __ mov(r5, r4);
-    ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
-    __ str(r2, MemOperand(r5, kPointerSize, PostIndex));
-    ASSERT_EQ(1 * kPointerSize, JSObject::kPropertiesOffset);
-    __ str(r6, MemOperand(r5, kPointerSize, PostIndex));
-    ASSERT_EQ(2 * kPointerSize, JSObject::kElementsOffset);
-    __ str(r6, MemOperand(r5, kPointerSize, PostIndex));
-
-    // Fill all the in-object properties with the appropriate filler.
-    // r1: constructor function
-    // r2: initial map
-    // r3: object size (in words)
-    // r4: JSObject (not tagged)
-    // r5: First in-object property of JSObject (not tagged)
-    __ add(r6, r4, Operand(r3, LSL, kPointerSizeLog2));  // End of object.
-    ASSERT_EQ(3 * kPointerSize, JSObject::kHeaderSize);
-    { Label loop, entry;
-      if (count_constructions) {
-        // To allow for truncation.
-        __ LoadRoot(r7, Heap::kOnePointerFillerMapRootIndex);
-      } else {
-        __ LoadRoot(r7, Heap::kUndefinedValueRootIndex);
-      }
-      __ b(&entry);
-      __ bind(&loop);
-      __ str(r7, MemOperand(r5, kPointerSize, PostIndex));
-      __ bind(&entry);
-      __ cmp(r5, r6);
-      __ b(lt, &loop);
-    }
-
-    // Add the object tag to make the JSObject real, so that we can continue and
-    // jump into the continuation code at any time from now on. Any failures
-    // need to undo the allocation, so that the heap is in a consistent state
-    // and verifiable.
-    __ add(r4, r4, Operand(kHeapObjectTag));
-
-    // Check if a non-empty properties array is needed. Continue with allocated
-    // object if not fall through to runtime call if it is.
-    // r1: constructor function
-    // r4: JSObject
-    // r5: start of next object (not tagged)
-    __ ldrb(r3, FieldMemOperand(r2, Map::kUnusedPropertyFieldsOffset));
-    // The field instance sizes contains both pre-allocated property fields and
-    // in-object properties.
-    __ ldr(r0, FieldMemOperand(r2, Map::kInstanceSizesOffset));
-    __ Ubfx(r6, r0, Map::kPreAllocatedPropertyFieldsByte * 8, 8);
-    __ add(r3, r3, Operand(r6));
-    __ Ubfx(r6, r0, Map::kInObjectPropertiesByte * 8, 8);
-    __ sub(r3, r3, Operand(r6), SetCC);
-
-    // Done if no extra properties are to be allocated.
-    __ b(eq, &allocated);
-    __ Assert(pl, "Property allocation count failed.");
-
-    // Scale the number of elements by pointer size and add the header for
-    // FixedArrays to the start of the next object calculation from above.
-    // r1: constructor
-    // r3: number of elements in properties array
-    // r4: JSObject
-    // r5: start of next object
-    __ add(r0, r3, Operand(FixedArray::kHeaderSize / kPointerSize));
-    __ AllocateInNewSpace(
-        r0,
-        r5,
-        r6,
-        r2,
-        &undo_allocation,
-        static_cast<AllocationFlags>(RESULT_CONTAINS_TOP | SIZE_IN_WORDS));
-
-    // Initialize the FixedArray.
-    // r1: constructor
-    // r3: number of elements in properties array
-    // r4: JSObject
-    // r5: FixedArray (not tagged)
-    __ LoadRoot(r6, Heap::kFixedArrayMapRootIndex);
-    __ mov(r2, r5);
-    ASSERT_EQ(0 * kPointerSize, JSObject::kMapOffset);
-    __ str(r6, MemOperand(r2, kPointerSize, PostIndex));
-    ASSERT_EQ(1 * kPointerSize, FixedArray::kLengthOffset);
-    __ mov(r0, Operand(r3, LSL, kSmiTagSize));
-    __ str(r0, MemOperand(r2, kPointerSize, PostIndex));
-
-    // Initialize the fields to undefined.
-    // r1: constructor function
-    // r2: First element of FixedArray (not tagged)
-    // r3: number of elements in properties array
-    // r4: JSObject
-    // r5: FixedArray (not tagged)
-    __ add(r6, r2, Operand(r3, LSL, kPointerSizeLog2));  // End of object.
-    ASSERT_EQ(2 * kPointerSize, FixedArray::kHeaderSize);
-    { Label loop, entry;
-      if (count_constructions) {
-        __ LoadRoot(r7, Heap::kUndefinedValueRootIndex);
-      } else if (FLAG_debug_code) {
-        __ LoadRoot(r8, Heap::kUndefinedValueRootIndex);
-        __ cmp(r7, r8);
-        __ Assert(eq, "Undefined value not loaded.");
-      }
-      __ b(&entry);
-      __ bind(&loop);
-      __ str(r7, MemOperand(r2, kPointerSize, PostIndex));
-      __ bind(&entry);
-      __ cmp(r2, r6);
-      __ b(lt, &loop);
-    }
-
-    // Store the initialized FixedArray into the properties field of
-    // the JSObject
-    // r1: constructor function
-    // r4: JSObject
-    // r5: FixedArray (not tagged)
-    __ add(r5, r5, Operand(kHeapObjectTag));  // Add the heap tag.
-    __ str(r5, FieldMemOperand(r4, JSObject::kPropertiesOffset));
-
-    // Continue with JSObject being successfully allocated
-    // r1: constructor function
-    // r4: JSObject
-    __ jmp(&allocated);
-
-    // Undo the setting of the new top so that the heap is verifiable. For
-    // example, the map's unused properties potentially do not match the
-    // allocated objects unused properties.
-    // r4: JSObject (previous new top)
-    __ bind(&undo_allocation);
-    __ UndoAllocationInNewSpace(r4, r5);
+    // Pop the function from the stack.
+    // sp[0]: constructor function
+    // sp[2]: receiver
+    // sp[3]: constructor function
+    // sp[4]: number of arguments (smi-tagged)
+    __ pop();
+
+    // Restore context from the frame.
+    // r0: result
+    // sp[0]: receiver
+    // sp[1]: constructor function
+    // sp[2]: number of arguments (smi-tagged)
+    __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
+
+    // If the result is an object (in the ECMA sense), we should get rid
+    // of the receiver and use the result; see ECMA-262 section 13.2.2-7
+    // on page 74.
+    Label use_receiver, exit;
+
+    // If the result is a smi, it is *not* an object in the ECMA sense.
+    // r0: result
+    // sp[0]: receiver (newly allocated object)
+    // sp[1]: constructor function
+    // sp[2]: number of arguments (smi-tagged)
+    __ JumpIfSmi(r0, &use_receiver);
+
+    // If the type of the result (stored in its map) is less than
+    // FIRST_SPEC_OBJECT_TYPE, it is not an object in the ECMA sense.
+    __ CompareObjectType(r0, r3, r3, FIRST_SPEC_OBJECT_TYPE);
+    __ b(ge, &exit);
+
+    // Throw away the result of the constructor invocation and use the
+    // on-stack receiver as the result.
+    __ bind(&use_receiver);
+    __ ldr(r0, MemOperand(sp));
+
+    // Remove receiver from the stack, remove caller arguments, and
+    // return.
+    __ bind(&exit);
+    // r0: result
+    // sp[0]: receiver (newly allocated object)
+    // sp[1]: constructor function
+    // sp[2]: number of arguments (smi-tagged)
+    __ ldr(r1, MemOperand(sp, 2 * kPointerSize));
+
+    // Leave construct frame.
   }
 
-  // Allocate the new receiver object using the runtime call.
-  // r1: constructor function
-  __ bind(&rt_call);
-  __ push(r1);  // argument for Runtime_NewObject
-  __ CallRuntime(Runtime::kNewObject, 1);
-  __ mov(r4, r0);
-
-  // Receiver for constructor call allocated.
-  // r4: JSObject
-  __ bind(&allocated);
-  __ push(r4);
-
-  // Push the function and the allocated receiver from the stack.
-  // sp[0]: receiver (newly allocated object)
-  // sp[1]: constructor function
-  // sp[2]: number of arguments (smi-tagged)
-  __ ldr(r1, MemOperand(sp, kPointerSize));
-  __ push(r1);  // Constructor function.
-  __ push(r4);  // Receiver.
-
-  // Reload the number of arguments from the stack.
-  // r1: constructor function
-  // sp[0]: receiver
-  // sp[1]: constructor function
-  // sp[2]: receiver
-  // sp[3]: constructor function
-  // sp[4]: number of arguments (smi-tagged)
-  __ ldr(r3, MemOperand(sp, 4 * kPointerSize));
-
-  // Setup pointer to last argument.
-  __ add(r2, fp, Operand(StandardFrameConstants::kCallerSPOffset));
-
-  // Setup number of arguments for function call below
-  __ mov(r0, Operand(r3, LSR, kSmiTagSize));
-
-  // Copy arguments and receiver to the expression stack.
-  // r0: number of arguments
-  // r2: address of last argument (caller sp)
-  // r1: constructor function
-  // r3: number of arguments (smi-tagged)
-  // sp[0]: receiver
-  // sp[1]: constructor function
-  // sp[2]: receiver
-  // sp[3]: constructor function
-  // sp[4]: number of arguments (smi-tagged)
-  Label loop, entry;
-  __ b(&entry);
-  __ bind(&loop);
-  __ ldr(ip, MemOperand(r2, r3, LSL, kPointerSizeLog2 - 1));
-  __ push(ip);
-  __ bind(&entry);
-  __ sub(r3, r3, Operand(2), SetCC);
-  __ b(ge, &loop);
-
-  // Call the function.
-  // r0: number of arguments
-  // r1: constructor function
-  if (is_api_function) {
-    __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
-    Handle<Code> code =
-        masm->isolate()->builtins()->HandleApiCallConstruct();
-    ParameterCount expected(0);
-    __ InvokeCode(code, expected, expected,
-                  RelocInfo::CODE_TARGET, CALL_FUNCTION, CALL_AS_METHOD);
-  } else {
-    ParameterCount actual(r0);
-    __ InvokeFunction(r1, actual, CALL_FUNCTION,
-                      NullCallWrapper(), CALL_AS_METHOD);
-  }
-
-  // Pop the function from the stack.
-  // sp[0]: constructor function
-  // sp[2]: receiver
-  // sp[3]: constructor function
-  // sp[4]: number of arguments (smi-tagged)
-  __ pop();
-
-  // Restore context from the frame.
-  // r0: result
-  // sp[0]: receiver
-  // sp[1]: constructor function
-  // sp[2]: number of arguments (smi-tagged)
-  __ ldr(cp, MemOperand(fp, StandardFrameConstants::kContextOffset));
-
-  // If the result is an object (in the ECMA sense), we should get rid
-  // of the receiver and use the result; see ECMA-262 section 13.2.2-7
-  // on page 74.
-  Label use_receiver, exit;
-
-  // If the result is a smi, it is *not* an object in the ECMA sense.
-  // r0: result
-  // sp[0]: receiver (newly allocated object)
-  // sp[1]: constructor function
-  // sp[2]: number of arguments (smi-tagged)
-  __ JumpIfSmi(r0, &use_receiver);
-
-  // If the type of the result (stored in its map) is less than
-  // FIRST_SPEC_OBJECT_TYPE, it is not an object in the ECMA sense.
-  __ CompareObjectType(r0, r3, r3, FIRST_SPEC_OBJECT_TYPE);
-  __ b(ge, &exit);
-
-  // Throw away the result of the constructor invocation and use the
-  // on-stack receiver as the result.
-  __ bind(&use_receiver);
-  __ ldr(r0, MemOperand(sp));
-
-  // Remove receiver from the stack, remove caller arguments, and
-  // return.
-  __ bind(&exit);
-  // r0: result
-  // sp[0]: receiver (newly allocated object)
-  // sp[1]: constructor function
-  // sp[2]: number of arguments (smi-tagged)
-  __ ldr(r1, MemOperand(sp, 2 * kPointerSize));
-  __ LeaveConstructFrame();
   __ add(sp, sp, Operand(r1, LSL, kPointerSizeLog2 - 1));
   __ add(sp, sp, Operand(kPointerSize));
   __ IncrementCounter(isolate->counters()->constructed_objects(), 1, r1, r2);
   __ Jump(lr);
 }
 
 
 void Builtins::Generate_JSConstructStubCountdown(MacroAssembler* masm) {
   Generate_JSConstructStubHelper(masm, false, true);
 }
@@ skipping 12 matching lines @@
 static void Generate_JSEntryTrampolineHelper(MacroAssembler* masm,
                                              bool is_construct) {
   // Called from Generate_JS_Entry
   // r0: code entry
   // r1: function
   // r2: receiver
   // r3: argc
   // r4: argv
   // r5-r7, cp may be clobbered
 
-  // Clear the context before we push it when entering the JS frame.
+  // Clear the context before we push it when entering the internal frame.
   __ mov(cp, Operand(0, RelocInfo::NONE));
 
   // Enter an internal frame.
-  __ EnterInternalFrame();
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
 
-  // Set up the context from the function argument.
-  __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
+    // Set up the context from the function argument.
+    __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
 
-  // Set up the roots register.
-  ExternalReference roots_address =
-      ExternalReference::roots_address(masm->isolate());
-  __ mov(r10, Operand(roots_address));
+    // Set up the roots register.
+    ExternalReference roots_address =
+        ExternalReference::roots_address(masm->isolate());
+    __ mov(r10, Operand(roots_address));
 
-  // Push the function and the receiver onto the stack.
-  __ push(r1);
-  __ push(r2);
+    // Push the function and the receiver onto the stack.
+    __ push(r1);
+    __ push(r2);
 
-  // Copy arguments to the stack in a loop.
-  // r1: function
-  // r3: argc
-  // r4: argv, i.e. points to first arg
-  Label loop, entry;
-  __ add(r2, r4, Operand(r3, LSL, kPointerSizeLog2));
-  // r2 points past last arg.
-  __ b(&entry);
-  __ bind(&loop);
-  __ ldr(r0, MemOperand(r4, kPointerSize, PostIndex));  // read next parameter
-  __ ldr(r0, MemOperand(r0));  // dereference handle
-  __ push(r0);  // push parameter
-  __ bind(&entry);
-  __ cmp(r4, r2);
-  __ b(ne, &loop);
+    // Copy arguments to the stack in a loop.
+    // r1: function
+    // r3: argc
+    // r4: argv, i.e. points to first arg
+    Label loop, entry;
+    __ add(r2, r4, Operand(r3, LSL, kPointerSizeLog2));
+    // r2 points past last arg.
+    __ b(&entry);
+    __ bind(&loop);
+    __ ldr(r0, MemOperand(r4, kPointerSize, PostIndex));  // read next parameter
+    __ ldr(r0, MemOperand(r0));  // dereference handle
+    __ push(r0);  // push parameter
+    __ bind(&entry);
+    __ cmp(r4, r2);
+    __ b(ne, &loop);
 
-  // Initialize all JavaScript callee-saved registers, since they will be seen
-  // by the garbage collector as part of handlers.
-  __ LoadRoot(r4, Heap::kUndefinedValueRootIndex);
-  __ mov(r5, Operand(r4));
-  __ mov(r6, Operand(r4));
-  __ mov(r7, Operand(r4));
-  if (kR9Available == 1) {
-    __ mov(r9, Operand(r4));
+    // Initialize all JavaScript callee-saved registers, since they will be seen
+    // by the garbage collector as part of handlers.
+    __ LoadRoot(r4, Heap::kUndefinedValueRootIndex);
+    __ mov(r5, Operand(r4));
+    __ mov(r6, Operand(r4));
+    __ mov(r7, Operand(r4));
+    if (kR9Available == 1) {
+      __ mov(r9, Operand(r4));
+    }
+
+    // Invoke the code and pass argc as r0.
+    __ mov(r0, Operand(r3));
+    if (is_construct) {
+      __ Call(masm->isolate()->builtins()->JSConstructCall());
+    } else {
+      ParameterCount actual(r0);
+      __ InvokeFunction(r1, actual, CALL_FUNCTION,
+                        NullCallWrapper(), CALL_AS_METHOD);
+    }
+    // Exit the JS frame and remove the parameters (except function), and
+    // return.
+    // Respect ABI stack constraint.
   }
-
-  // Invoke the code and pass argc as r0.
-  __ mov(r0, Operand(r3));
-  if (is_construct) {
-    __ Call(masm->isolate()->builtins()->JSConstructCall());
-  } else {
-    ParameterCount actual(r0);
-    __ InvokeFunction(r1, actual, CALL_FUNCTION,
-                      NullCallWrapper(), CALL_AS_METHOD);
-  }
-
-  // Exit the JS frame and remove the parameters (except function), and return.
-  // Respect ABI stack constraint.
-  __ LeaveInternalFrame();
   __ Jump(lr);
 
   // r0: result
 }
 
 
 void Builtins::Generate_JSEntryTrampoline(MacroAssembler* masm) {
   Generate_JSEntryTrampolineHelper(masm, false);
 }
 
 
 void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
   Generate_JSEntryTrampolineHelper(masm, true);
 }
 
 
 void Builtins::Generate_LazyCompile(MacroAssembler* masm) {
   // Enter an internal frame.
-  __ EnterInternalFrame();
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
 
-  // Preserve the function.
-  __ push(r1);
-  // Push call kind information.
-  __ push(r5);
+    // Preserve the function.
+    __ push(r1);
+    // Push call kind information.
+    __ push(r5);
 
-  // Push the function on the stack as the argument to the runtime function.
-  __ push(r1);
-  __ CallRuntime(Runtime::kLazyCompile, 1);
-  // Calculate the entry point.
-  __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
+    // Push the function on the stack as the argument to the runtime function.
+    __ push(r1);
+    __ CallRuntime(Runtime::kLazyCompile, 1);
+    // Calculate the entry point.
+    __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
 
-  // Restore call kind information.
-  __ pop(r5);
-  // Restore saved function.
-  __ pop(r1);
+    // Restore call kind information.
+    __ pop(r5);
+    // Restore saved function.
+    __ pop(r1);
 
-  // Tear down temporary frame.
-  __ LeaveInternalFrame();
+    // Tear down internal frame.
+  }
 
   // Do a tail-call of the compiled function.
   __ Jump(r2);
 }
 
 
 void Builtins::Generate_LazyRecompile(MacroAssembler* masm) {
   // Enter an internal frame.
-  __ EnterInternalFrame();
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
 
-  // Preserve the function.
-  __ push(r1);
-  // Push call kind information.
-  __ push(r5);
+    // Preserve the function.
+    __ push(r1);
+    // Push call kind information.
+    __ push(r5);
 
-  // Push the function on the stack as the argument to the runtime function.
-  __ push(r1);
-  __ CallRuntime(Runtime::kLazyRecompile, 1);
-  // Calculate the entry point.
-  __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
+    // Push the function on the stack as the argument to the runtime function.
+    __ push(r1);
+    __ CallRuntime(Runtime::kLazyRecompile, 1);
+    // Calculate the entry point.
+    __ add(r2, r0, Operand(Code::kHeaderSize - kHeapObjectTag));
 
-  // Restore call kind information.
-  __ pop(r5);
-  // Restore saved function.
-  __ pop(r1);
+    // Restore call kind information.
+    __ pop(r5);
+    // Restore saved function.
+    __ pop(r1);
 
-  // Tear down temporary frame.
-  __ LeaveInternalFrame();
+    // Tear down internal frame.
+  }
 
   // Do a tail-call of the compiled function.
   __ Jump(r2);
 }
 
 
 static void Generate_NotifyDeoptimizedHelper(MacroAssembler* masm,
                                              Deoptimizer::BailoutType type) {
-  __ EnterInternalFrame();
-  // Pass the function and deoptimization type to the runtime system.
-  __ mov(r0, Operand(Smi::FromInt(static_cast<int>(type))));
-  __ push(r0);
-  __ CallRuntime(Runtime::kNotifyDeoptimized, 1);
-  __ LeaveInternalFrame();
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    // Pass the function and deoptimization type to the runtime system.
+    __ mov(r0, Operand(Smi::FromInt(static_cast<int>(type))));
+    __ push(r0);
+    __ CallRuntime(Runtime::kNotifyDeoptimized, 1);
+  }
 
   // Get the full codegen state from the stack and untag it -> r6.
   __ ldr(r6, MemOperand(sp, 0 * kPointerSize));
   __ SmiUntag(r6);
   // Switch on the state.
   Label with_tos_register, unknown_state;
   __ cmp(r6, Operand(FullCodeGenerator::NO_REGISTERS));
   __ b(ne, &with_tos_register);
   __ add(sp, sp, Operand(1 * kPointerSize));  // Remove state.
   __ Ret();
@@ skipping 19 matching lines @@
   Generate_NotifyDeoptimizedHelper(masm, Deoptimizer::LAZY);
 }
 
 
 void Builtins::Generate_NotifyOSR(MacroAssembler* masm) {
   // For now, we are relying on the fact that Runtime::NotifyOSR
   // doesn't do any garbage collection which allows us to save/restore
   // the registers without worrying about which of them contain
   // pointers. This seems a bit fragile.
   __ stm(db_w, sp, kJSCallerSaved | kCalleeSaved | lr.bit() | fp.bit());
-  __ EnterInternalFrame();
-  __ CallRuntime(Runtime::kNotifyOSR, 0);
-  __ LeaveInternalFrame();
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ CallRuntime(Runtime::kNotifyOSR, 0);
+  }
   __ ldm(ia_w, sp, kJSCallerSaved | kCalleeSaved | lr.bit() | fp.bit());
   __ Ret();
 }
 
 
 void Builtins::Generate_OnStackReplacement(MacroAssembler* masm) {
   CpuFeatures::TryForceFeatureScope scope(VFP3);
   if (!CpuFeatures::IsSupported(VFP3)) {
     __ Abort("Unreachable code: Cannot optimize without VFP3 support.");
     return;
   }
 
   // Lookup the function in the JavaScript frame and push it as an
   // argument to the on-stack replacement function.
   __ ldr(r0, MemOperand(fp, JavaScriptFrameConstants::kFunctionOffset));
-  __ EnterInternalFrame();
-  __ push(r0);
-  __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1);
-  __ LeaveInternalFrame();
+  {
+    FrameScope scope(masm, StackFrame::INTERNAL);
+    __ push(r0);
+    __ CallRuntime(Runtime::kCompileForOnStackReplacement, 1);
+  }
 
   // If the result was -1 it means that we couldn't optimize the
   // function. Just return and continue in the unoptimized version.
   Label skip;
   __ cmp(r0, Operand(Smi::FromInt(-1)));
   __ b(ne, &skip);
   __ Ret();
 
   __ bind(&skip);
   // Untag the AST id and push it on the stack.
@@ skipping 61 matching lines @@
     __ b(eq, &use_global_receiver);
     __ LoadRoot(r3, Heap::kNullValueRootIndex);
     __ cmp(r2, r3);
     __ b(eq, &use_global_receiver);
 
     STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
     __ CompareObjectType(r2, r3, r3, FIRST_SPEC_OBJECT_TYPE);
     __ b(ge, &shift_arguments);
 
     __ bind(&convert_to_object);
-    __ EnterInternalFrame();  // In order to preserve argument count.
-    __ mov(r0, Operand(r0, LSL, kSmiTagSize));  // Smi-tagged.
-    __ push(r0);
 
-    __ push(r2);
-    __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
-    __ mov(r2, r0);
+    {
+      // Enter an internal frame in order to preserve argument count.
+      FrameScope scope(masm, StackFrame::INTERNAL);
+      __ mov(r0, Operand(r0, LSL, kSmiTagSize));  // Smi-tagged.
+      __ push(r0);
 
-    __ pop(r0);
-    __ mov(r0, Operand(r0, ASR, kSmiTagSize));
-    __ LeaveInternalFrame();
+      __ push(r2);
+      __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
+      __ mov(r2, r0);
+
+      __ pop(r0);
+      __ mov(r0, Operand(r0, ASR, kSmiTagSize));
+
+      // Exit the internal frame.
+    }
+
     // Restore the function to r1, and the flag to r4.
     __ ldr(r1, MemOperand(sp, r0, LSL, kPointerSizeLog2));
     __ mov(r4, Operand(0, RelocInfo::NONE));
     __ jmp(&patch_receiver);
 
     // Use the global receiver object from the called function as the
     // receiver.
     __ bind(&use_global_receiver);
     const int kGlobalIndex =
         Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
@@ skipping 99 matching lines @@
 }
 
 
 void Builtins::Generate_FunctionApply(MacroAssembler* masm) {
   const int kIndexOffset    = -5 * kPointerSize;
   const int kLimitOffset    = -4 * kPointerSize;
   const int kArgsOffset     =  2 * kPointerSize;
   const int kRecvOffset     =  3 * kPointerSize;
   const int kFunctionOffset =  4 * kPointerSize;
 
-  __ EnterInternalFrame();
+  {
+    FrameScope frame_scope(masm, StackFrame::INTERNAL);
 
-  __ ldr(r0, MemOperand(fp, kFunctionOffset));  // get the function
-  __ push(r0);
-  __ ldr(r0, MemOperand(fp, kArgsOffset));  // get the args array
-  __ push(r0);
-  __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION);
+    __ ldr(r0, MemOperand(fp, kFunctionOffset));  // get the function
+    __ push(r0);
+    __ ldr(r0, MemOperand(fp, kArgsOffset));  // get the args array
+    __ push(r0);
+    __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_FUNCTION);
 
-  // Check the stack for overflow. We are not trying to catch
-  // interruptions (e.g. debug break and preemption) here, so the "real stack
-  // limit" is checked.
-  Label okay;
-  __ LoadRoot(r2, Heap::kRealStackLimitRootIndex);
-  // Make r2 the space we have left. The stack might already be overflowed
-  // here which will cause r2 to become negative.
-  __ sub(r2, sp, r2);
-  // Check if the arguments will overflow the stack.
-  __ cmp(r2, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize));
-  __ b(gt, &okay);  // Signed comparison.
+    // Check the stack for overflow. We are not trying to catch
+    // interruptions (e.g. debug break and preemption) here, so the "real stack
+    // limit" is checked.
+    Label okay;
+    __ LoadRoot(r2, Heap::kRealStackLimitRootIndex);
+    // Make r2 the space we have left. The stack might already be overflowed
+    // here which will cause r2 to become negative.
+    __ sub(r2, sp, r2);
+    // Check if the arguments will overflow the stack.
+    __ cmp(r2, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize));
+    __ b(gt, &okay);  // Signed comparison.
 
-  // Out of stack space.
-  __ ldr(r1, MemOperand(fp, kFunctionOffset));
-  __ push(r1);
-  __ push(r0);
-  __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION);
-  // End of stack check.
+    // Out of stack space.
+    __ ldr(r1, MemOperand(fp, kFunctionOffset));
+    __ push(r1);
+    __ push(r0);
+    __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_FUNCTION);
+    // End of stack check.
 
-  // Push current limit and index.
-  __ bind(&okay);
-  __ push(r0);  // limit
-  __ mov(r1, Operand(0, RelocInfo::NONE));  // initial index
-  __ push(r1);
+    // Push current limit and index.
+    __ bind(&okay);
+    __ push(r0);  // limit
+    __ mov(r1, Operand(0, RelocInfo::NONE));  // initial index
+    __ push(r1);
 
-  // Get the receiver.
-  __ ldr(r0, MemOperand(fp, kRecvOffset));
+    // Get the receiver.
+    __ ldr(r0, MemOperand(fp, kRecvOffset));
 
-  // Check that the function is a JS function (otherwise it must be a proxy).
-  Label push_receiver;
-  __ ldr(r1, MemOperand(fp, kFunctionOffset));
-  __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE);
-  __ b(ne, &push_receiver);
+    // Check that the function is a JS function (otherwise it must be a proxy).
+    Label push_receiver;
+    __ ldr(r1, MemOperand(fp, kFunctionOffset));
+    __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE);
+    __ b(ne, &push_receiver);
 
-  // Change context eagerly to get the right global object if necessary.
-  __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
-  // Load the shared function info while the function is still in r1.
-  __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
+    // Change context eagerly to get the right global object if necessary.
+    __ ldr(cp, FieldMemOperand(r1, JSFunction::kContextOffset));
+    // Load the shared function info while the function is still in r1.
+    __ ldr(r2, FieldMemOperand(r1, JSFunction::kSharedFunctionInfoOffset));
 
-  // Compute the receiver.
-  // Do not transform the receiver for strict mode functions.
-  Label call_to_object, use_global_receiver;
-  __ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kCompilerHintsOffset));
-  __ tst(r2, Operand(1 << (SharedFunctionInfo::kStrictModeFunction +
-                           kSmiTagSize)));
-  __ b(ne, &push_receiver);
+    // Compute the receiver.
+    // Do not transform the receiver for strict mode functions.
+    Label call_to_object, use_global_receiver;
+    __ ldr(r2, FieldMemOperand(r2, SharedFunctionInfo::kCompilerHintsOffset));
+    __ tst(r2, Operand(1 << (SharedFunctionInfo::kStrictModeFunction +
+                             kSmiTagSize)));
+    __ b(ne, &push_receiver);
 
-  // Do not transform the receiver for strict mode functions.
-  __ tst(r2, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize)));
-  __ b(ne, &push_receiver);
+    // Do not transform the receiver for strict mode functions.
+    __ tst(r2, Operand(1 << (SharedFunctionInfo::kNative + kSmiTagSize)));
+    __ b(ne, &push_receiver);
 
-  // Compute the receiver in non-strict mode.
-  __ JumpIfSmi(r0, &call_to_object);
-  __ LoadRoot(r1, Heap::kNullValueRootIndex);
-  __ cmp(r0, r1);
-  __ b(eq, &use_global_receiver);
-  __ LoadRoot(r1, Heap::kUndefinedValueRootIndex);
-  __ cmp(r0, r1);
-  __ b(eq, &use_global_receiver);
+    // Compute the receiver in non-strict mode.
+    __ JumpIfSmi(r0, &call_to_object);
+    __ LoadRoot(r1, Heap::kNullValueRootIndex);
+    __ cmp(r0, r1);
+    __ b(eq, &use_global_receiver);
+    __ LoadRoot(r1, Heap::kUndefinedValueRootIndex);
+    __ cmp(r0, r1);
+    __ b(eq, &use_global_receiver);
 
-  // Check if the receiver is already a JavaScript object.
-  // r0: receiver
-  STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
-  __ CompareObjectType(r0, r1, r1, FIRST_SPEC_OBJECT_TYPE);
-  __ b(ge, &push_receiver);
+    // Check if the receiver is already a JavaScript object.
+    // r0: receiver
+    STATIC_ASSERT(LAST_SPEC_OBJECT_TYPE == LAST_TYPE);
+    __ CompareObjectType(r0, r1, r1, FIRST_SPEC_OBJECT_TYPE);
+    __ b(ge, &push_receiver);
 
-  // Convert the receiver to a regular object.
-  // r0: receiver
-  __ bind(&call_to_object);
-  __ push(r0);
-  __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
-  __ b(&push_receiver);
+    // Convert the receiver to a regular object.
+    // r0: receiver
+    __ bind(&call_to_object);
+    __ push(r0);
+    __ InvokeBuiltin(Builtins::TO_OBJECT, CALL_FUNCTION);
+    __ b(&push_receiver);
 
-  // Use the current global receiver object as the receiver.
-  __ bind(&use_global_receiver);
-  const int kGlobalOffset =
-      Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
-  __ ldr(r0, FieldMemOperand(cp, kGlobalOffset));
-  __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalContextOffset));
-  __ ldr(r0, FieldMemOperand(r0, kGlobalOffset));
-  __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
+    // Use the current global receiver object as the receiver.
+    __ bind(&use_global_receiver);
+    const int kGlobalOffset =
+        Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize;
+    __ ldr(r0, FieldMemOperand(cp, kGlobalOffset));
+    __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalContextOffset));
+    __ ldr(r0, FieldMemOperand(r0, kGlobalOffset));
+    __ ldr(r0, FieldMemOperand(r0, GlobalObject::kGlobalReceiverOffset));
 
-  // Push the receiver.
-  // r0: receiver
-  __ bind(&push_receiver);
-  __ push(r0);
+    // Push the receiver.
+    // r0: receiver
+    __ bind(&push_receiver);
+    __ push(r0);
 
-  // Copy all arguments from the array to the stack.
-  Label entry, loop;
-  __ ldr(r0, MemOperand(fp, kIndexOffset));
-  __ b(&entry);
+    // Copy all arguments from the array to the stack.
+    Label entry, loop;
+    __ ldr(r0, MemOperand(fp, kIndexOffset));
+    __ b(&entry);
 
-  // Load the current argument from the arguments array and push it to the
-  // stack.
-  // r0: current argument index
-  __ bind(&loop);
-  __ ldr(r1, MemOperand(fp, kArgsOffset));
-  __ push(r1);
-  __ push(r0);
+    // Load the current argument from the arguments array and push it to the
+    // stack.
+    // r0: current argument index
+    __ bind(&loop);
+    __ ldr(r1, MemOperand(fp, kArgsOffset));
+    __ push(r1);
+    __ push(r0);
 
-  // Call the runtime to access the property in the arguments array.
-  __ CallRuntime(Runtime::kGetProperty, 2);
-  __ push(r0);
+    // Call the runtime to access the property in the arguments array.
+    __ CallRuntime(Runtime::kGetProperty, 2);
+    __ push(r0);
 
-  // Use inline caching to access the arguments.
-  __ ldr(r0, MemOperand(fp, kIndexOffset));
-  __ add(r0, r0, Operand(1 << kSmiTagSize));
-  __ str(r0, MemOperand(fp, kIndexOffset));
+    // Use inline caching to access the arguments.
+    __ ldr(r0, MemOperand(fp, kIndexOffset));
+    __ add(r0, r0, Operand(1 << kSmiTagSize));
+    __ str(r0, MemOperand(fp, kIndexOffset));
 
-  // Test if the copy loop has finished copying all the elements from the
-  // arguments object.
-  __ bind(&entry);
-  __ ldr(r1, MemOperand(fp, kLimitOffset));
-  __ cmp(r0, r1);
-  __ b(ne, &loop);
+    // Test if the copy loop has finished copying all the elements from the
+    // arguments object.
+    __ bind(&entry);
+    __ ldr(r1, MemOperand(fp, kLimitOffset));
+    __ cmp(r0, r1);
+    __ b(ne, &loop);
 
-  // Invoke the function.
-  Label call_proxy;
-  ParameterCount actual(r0);
-  __ mov(r0, Operand(r0, ASR, kSmiTagSize));
-  __ ldr(r1, MemOperand(fp, kFunctionOffset));
-  __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE);
-  __ b(ne, &call_proxy);
-  __ InvokeFunction(r1, actual, CALL_FUNCTION,
-                    NullCallWrapper(), CALL_AS_METHOD);
+    // Invoke the function.
+    Label call_proxy;
+    ParameterCount actual(r0);
+    __ mov(r0, Operand(r0, ASR, kSmiTagSize));
+    __ ldr(r1, MemOperand(fp, kFunctionOffset));
+    __ CompareObjectType(r1, r2, r2, JS_FUNCTION_TYPE);
+    __ b(ne, &call_proxy);
+    __ InvokeFunction(r1, actual, CALL_FUNCTION,
+                      NullCallWrapper(), CALL_AS_METHOD);
 
-  // Tear down the internal frame and remove function, receiver and args.
-  __ LeaveInternalFrame();
-  __ add(sp, sp, Operand(3 * kPointerSize));
-  __ Jump(lr);
+    frame_scope.GenerateLeaveFrame();
+    __ add(sp, sp, Operand(3 * kPointerSize));
+    __ Jump(lr);
 
-  // Invoke the function proxy.
-  __ bind(&call_proxy);
-  __ push(r1);  // add function proxy as last argument
-  __ add(r0, r0, Operand(1));
-  __ mov(r2, Operand(0, RelocInfo::NONE));
-  __ SetCallKind(r5, CALL_AS_METHOD);
-  __ GetBuiltinEntry(r3, Builtins::CALL_FUNCTION_PROXY);
-  __ Call(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
-          RelocInfo::CODE_TARGET);
+    // Invoke the function proxy.
+    __ bind(&call_proxy);
+    __ push(r1);  // add function proxy as last argument
+    __ add(r0, r0, Operand(1));
+    __ mov(r2, Operand(0, RelocInfo::NONE));
+    __ SetCallKind(r5, CALL_AS_METHOD);
+    __ GetBuiltinEntry(r3, Builtins::CALL_FUNCTION_PROXY);
+    __ Call(masm->isolate()->builtins()->ArgumentsAdaptorTrampoline(),
+            RelocInfo::CODE_TARGET);
 
-  __ LeaveInternalFrame();
+    // Tear down the internal frame and remove function, receiver and args.
+  }
   __ add(sp, sp, Operand(3 * kPointerSize));
   __ Jump(lr);
 }
 
 
 static void EnterArgumentsAdaptorFrame(MacroAssembler* masm) {
   __ mov(r0, Operand(r0, LSL, kSmiTagSize));
   __ mov(r4, Operand(Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)));
   __ stm(db_w, sp, r0.bit() | r1.bit() | r4.bit() | fp.bit() | lr.bit());
   __ add(fp, sp, Operand(3 * kPointerSize));
@@ skipping 117 matching lines @@
   __ bind(&dont_adapt_arguments);
   __ Jump(r3);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_ARM