Supporting AllocationSiteInfo for Nested arrays

src/x64/code-stubs-x64.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 379 matching lines @@
         i += kDoubleSize;
       }
       ASSERT(i == elements_size);
     }
   }
 }
 
 void FastCloneShallowArrayStub::Generate(MacroAssembler* masm) {
   // Stack layout on entry:
   //
-  // [rsp + kPointerSize]: constant elements.
-  // [rsp + (2 * kPointerSize)]: literal index.
-  // [rsp + (3 * kPointerSize)]: literals array.
+  // [rsp + kPointerSize]: flags (ignored)
+  // [rsp + (2 * kPointerSize)]: constant elements.
+  // [rsp + (3 * kPointerSize)]: literal index.
+  // [rsp + (4 * kPointerSize)]: literals array.
 
   // Load boilerplate object into rcx and check if we need to create a
   // boilerplate.
-  __ movq(rcx, Operand(rsp, 3 * kPointerSize));
-  __ movq(rax, Operand(rsp, 2 * kPointerSize));
+  __ movq(rcx, Operand(rsp, 4 * kPointerSize));
+  __ movq(rax, Operand(rsp, 3 * kPointerSize));
   SmiIndex index = masm->SmiToIndex(rax, rax, kPointerSizeLog2);
   __ movq(rcx,
           FieldOperand(rcx, index.reg, index.scale, FixedArray::kHeaderSize));
   __ CompareRoot(rcx, Heap::kUndefinedValueRootIndex);
   Label slow_case;
   __ j(equal, &slow_case);
 
   FastCloneShallowArrayStub::Mode mode = mode_;
   // rcx is boilerplate object.
   Factory* factory = masm->isolate()->factory();
   if (mode == CLONE_ANY_ELEMENTS) {
     Label double_elements, check_fast_elements;
     __ movq(rbx, FieldOperand(rcx, JSArray::kElementsOffset));
     __ Cmp(FieldOperand(rbx, HeapObject::kMapOffset),
            factory->fixed_cow_array_map());
     __ j(not_equal, &check_fast_elements);
     GenerateFastCloneShallowArrayCommon(masm, 0, COPY_ON_WRITE_ELEMENTS,
                                         allocation_site_mode_,
                                         &slow_case);
-    __ ret(3 * kPointerSize);
+    __ ret(4 * kPointerSize);
 
     __ bind(&check_fast_elements);
     __ Cmp(FieldOperand(rbx, HeapObject::kMapOffset),
            factory->fixed_array_map());
     __ j(not_equal, &double_elements);
     GenerateFastCloneShallowArrayCommon(masm, length_, CLONE_ELEMENTS,
                                         allocation_site_mode_,
                                         &slow_case);
-    __ ret(3 * kPointerSize);
+    __ ret(4 * kPointerSize);
 
     __ bind(&double_elements);
     mode = CLONE_DOUBLE_ELEMENTS;
     // Fall through to generate the code to handle double elements.
   }
 
   if (FLAG_debug_code) {
     const char* message;
     Heap::RootListIndex expected_map_index;
     if (mode == CLONE_ELEMENTS) {
@@ skipping 11 matching lines @@
     __ movq(rcx, FieldOperand(rcx, JSArray::kElementsOffset));
     __ CompareRoot(FieldOperand(rcx, HeapObject::kMapOffset),
                    expected_map_index);
     __ Assert(equal, message);
     __ pop(rcx);
   }
 
   GenerateFastCloneShallowArrayCommon(masm, length_, mode,
                                       allocation_site_mode_,
                                       &slow_case);
-  __ ret(3 * kPointerSize);
+  __ ret(4 * kPointerSize);
 
   __ bind(&slow_case);
-  __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 3, 1);
+  __ TailCallRuntime(Runtime::kCreateArrayLiteralShallow, 4, 1);
 }
 
 
 void FastCloneShallowObjectStub::Generate(MacroAssembler* masm) {
   // Stack layout on entry:
   //
   // [rsp + kPointerSize]: object literal flags.
   // [rsp + (2 * kPointerSize)]: constant properties.
   // [rsp + (3 * kPointerSize)]: literal index.
   // [rsp + (4 * kPointerSize)]: literals array.
@@ skipping 6211 matching lines @@
 #endif
 
   __ Ret();
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64