Revert r4715.

src/x64/builtins-x64.cc

 // Copyright 2009 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 290 matching lines @@
     __ Jump(Handle<Code>(builtin(ArgumentsAdaptorTrampoline)),
             RelocInfo::CODE_TARGET);
     __ bind(&function);
   }
 
   // 5b. Get the code to call from the function and check that the number of
   //     expected arguments matches what we're providing.  If so, jump
   //     (tail-call) to the code in register edx without checking arguments.
   __ movq(rdx, FieldOperand(rdi, JSFunction::kSharedFunctionInfoOffset));
   __ movsxlq(rbx,
-             FieldOperand(rdx,
-                          SharedFunctionInfo::kFormalParameterCountOffset));
+         FieldOperand(rdx, SharedFunctionInfo::kFormalParameterCountOffset));
   __ movq(rdx, FieldOperand(rdx, SharedFunctionInfo::kCodeOffset));
   __ lea(rdx, FieldOperand(rdx, Code::kHeaderSize));
   __ cmpq(rax, rbx);
   __ j(not_equal,
        Handle<Code>(builtin(ArgumentsAdaptorTrampoline)),
        RelocInfo::CODE_TARGET);
 
   ParameterCount expected(0);
   __ InvokeCode(rdx, expected, expected, JUMP_FUNCTION);
 }
@@ skipping 196 matching lines @@
     return;
   }
 
   // Calculate the location of the elements array and set elements array member
   // of the JSArray.
   // result: JSObject
   // scratch2: start of next object
   __ lea(scratch1, Operand(result, JSArray::kSize));
   __ movq(FieldOperand(result, JSArray::kElementsOffset), scratch1);
 
-  // Initialize the FixedArray and fill it with holes. FixedArray length is
+  // Initialize the FixedArray and fill it with holes. FixedArray length is not
   // stored as a smi.
   // result: JSObject
   // scratch1: elements array
   // scratch2: start of next object
-  __ Move(FieldOperand(scratch1, HeapObject::kMapOffset),
+  __ Move(FieldOperand(scratch1, JSObject::kMapOffset),
           Factory::fixed_array_map());
-  __ Move(FieldOperand(scratch1, FixedArray::kLengthOffset),
-          Smi::FromInt(initial_capacity));
+  __ movq(FieldOperand(scratch1, Array::kLengthOffset),
+          Immediate(initial_capacity));
 
   // Fill the FixedArray with the hole value. Inline the code if short.
   // Reconsider loop unfolding if kPreallocatedArrayElements gets changed.
   static const int kLoopUnfoldLimit = 4;
   ASSERT(kPreallocatedArrayElements <= kLoopUnfoldLimit);
   __ Move(scratch3, Factory::the_hole_value());
   if (initial_capacity <= kLoopUnfoldLimit) {
     // Use a scratch register here to have only one reloc info when unfolding
     // the loop.
     for (int i = 0; i < initial_capacity; i++) {
@@ skipping 33 matching lines @@
                             bool fill_with_hole,
                             Label* gc_required) {
   Label not_empty, allocated;
 
   // Load the initial map from the array function.
   __ movq(elements_array,
           FieldOperand(array_function,
                        JSFunction::kPrototypeOrInitialMapOffset));
 
   // Check whether an empty sized array is requested.
+  __ SmiToInteger64(array_size, array_size);
   __ testq(array_size, array_size);
   __ j(not_zero, &not_empty);
 
   // If an empty array is requested allocate a small elements array anyway. This
   // keeps the code below free of special casing for the empty array.
   int size = JSArray::kSize + FixedArray::SizeFor(kPreallocatedArrayElements);
   __ AllocateInNewSpace(size,
                         result,
                         elements_array_end,
                         scratch,
                         gc_required,
                         TAG_OBJECT);
   __ jmp(&allocated);
 
   // Allocate the JSArray object together with space for a FixedArray with the
   // requested elements.
   __ bind(&not_empty);
-  SmiIndex index =
-      masm->SmiToIndex(kScratchRegister, array_size, kPointerSizeLog2);
+  ASSERT(kSmiTagSize == 1 && kSmiTag == 0);
   __ AllocateInNewSpace(JSArray::kSize + FixedArray::kHeaderSize,
-                        index.scale,
-                        index.reg,
+                        times_pointer_size,
+                        array_size,
                         result,
                         elements_array_end,
                         scratch,
                         gc_required,
                         TAG_OBJECT);
 
   // Allocated the JSArray. Now initialize the fields except for the elements
   // array.
   // result: JSObject
   // elements_array: initial map
   // elements_array_end: start of next object
-  // array_size: size of array (smi)
+  // array_size: size of array
   __ bind(&allocated);
   __ movq(FieldOperand(result, JSObject::kMapOffset), elements_array);
   __ Move(elements_array, Factory::empty_fixed_array());
   __ movq(FieldOperand(result, JSArray::kPropertiesOffset), elements_array);
   // Field JSArray::kElementsOffset is initialized later.
-  __ movq(FieldOperand(result, JSArray::kLengthOffset), array_size);
+  __ Integer32ToSmi(scratch, array_size);
+  __ movq(FieldOperand(result, JSArray::kLengthOffset), scratch);
 
   // Calculate the location of the elements array and set elements array member
   // of the JSArray.
   // result: JSObject
   // elements_array_end: start of next object
-  // array_size: size of array (smi)
+  // array_size: size of array
   __ lea(elements_array, Operand(result, JSArray::kSize));
   __ movq(FieldOperand(result, JSArray::kElementsOffset), elements_array);
 
-  // Initialize the fixed array. FixedArray length is stored as a smi.
+  // Initialize the fixed array. FixedArray length is not stored as a smi.
   // result: JSObject
   // elements_array: elements array
   // elements_array_end: start of next object
-  // array_size: size of array (smi)
+  // array_size: size of array
+  ASSERT(kSmiTag == 0);
   __ Move(FieldOperand(elements_array, JSObject::kMapOffset),
           Factory::fixed_array_map());
   Label not_empty_2, fill_array;
-  __ SmiTest(array_size);
+  __ testq(array_size, array_size);
   __ j(not_zero, &not_empty_2);
   // Length of the FixedArray is the number of pre-allocated elements even
   // though the actual JSArray has length 0.
-  __ Move(FieldOperand(elements_array, FixedArray::kLengthOffset),
-          Smi::FromInt(kPreallocatedArrayElements));
+  __ movq(FieldOperand(elements_array, Array::kLengthOffset),
+          Immediate(kPreallocatedArrayElements));
   __ jmp(&fill_array);
   __ bind(&not_empty_2);
   // For non-empty JSArrays the length of the FixedArray and the JSArray is the
   // same.
-  __ movq(FieldOperand(elements_array, FixedArray::kLengthOffset), array_size);
+  __ movq(FieldOperand(elements_array, Array::kLengthOffset), array_size);
 
   // Fill the allocated FixedArray with the hole value if requested.
   // result: JSObject
   // elements_array: elements array
   // elements_array_end: start of next object
   __ bind(&fill_array);
   if (fill_with_hole) {
     Label loop, entry;
     __ Move(scratch, Factory::the_hole_value());
     __ lea(elements_array, Operand(elements_array,
@@ skipping 362 matching lines @@
                           no_reg,
                           &undo_allocation,
                           RESULT_CONTAINS_TOP);
 
     // Initialize the FixedArray.
     // rbx: JSObject
     // rdi: FixedArray
     // rdx: number of elements
     // rax: start of next object
     __ LoadRoot(rcx, Heap::kFixedArrayMapRootIndex);
-    __ movq(Operand(rdi, HeapObject::kMapOffset), rcx);  // setup the map
-    __ Integer32ToSmi(rdx, rdx);
-    __ movq(Operand(rdi, FixedArray::kLengthOffset), rdx);  // and length
+    __ movq(Operand(rdi, JSObject::kMapOffset), rcx);  // setup the map
+    __ movl(Operand(rdi, FixedArray::kLengthOffset), rdx);  // and length
 
     // Initialize the fields to undefined.
     // rbx: JSObject
     // rdi: FixedArray
     // rax: start of next object
     // rdx: number of elements
     { Label loop, entry;
       __ LoadRoot(rdx, Heap::kUndefinedValueRootIndex);
       __ lea(rcx, Operand(rdi, FixedArray::kHeaderSize));
       __ jmp(&entry);
@@ skipping 240 matching lines @@
 }
 
 
 void Builtins::Generate_JSConstructEntryTrampoline(MacroAssembler* masm) {
   Generate_JSEntryTrampolineHelper(masm, true);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64