Replace store array length builtin with codestub.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
diff --git a/src/ia32/code-stubs-ia32.cc b/src/ia32/code-stubs-ia32.cc
index 4e4a60923228d28b659bf2f8d24ca1ec0802cf4b..35bda31f90fa8a47bcd61345ec1d2a771e895f98 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -3317,6 +3317,70 @@ void StringLengthStub::Generate(MacroAssembler* masm) {
 }
 
 
+void StoreArrayLengthStub::Generate(MacroAssembler* masm) {
+  // ----------- S t a t e -------------
+  //  -- eax    : value
+  //  -- ecx    : name
+  //  -- edx    : receiver
+  //  -- esp[0] : return address
+  // -----------------------------------
+  //
+  // This accepts as a receiver anything JSArray::SetElementsLength accepts
+  // (currently anything except for external arrays which means anything with
+  // elements of FixedArray type).  Value must be a number, but only smis are
+  // accepted as the most common case.
+
+  Label miss;
+
+  Register receiver = edx;
+  Register value = eax;
+  Register scratch = ebx;
+
+  if (kind() == Code::KEYED_LOAD_IC) {
+    __ cmp(ecx, Immediate(masm->isolate()->factory()->length_symbol()));
+    __ j(not_equal, &miss);
+  }
+
+  // Check that the receiver isn't a smi.
+  __ JumpIfSmi(receiver, &miss);
+
+  // Check that the object is a JS array.
+  __ CmpObjectType(receiver, JS_ARRAY_TYPE, scratch);
+  __ j(not_equal, &miss);
+
+  // Check that elements are FixedArray.
+  // We rely on StoreIC_ArrayLength below to deal with all types of
+  // fast elements (including COW).
+  __ mov(scratch, FieldOperand(receiver, JSArray::kElementsOffset));
+  __ CmpObjectType(scratch, FIXED_ARRAY_TYPE, scratch);
+  __ j(not_equal, &miss);
+
+  // Check that the array has fast properties, otherwise the length
+  // property might have been redefined.
+  __ mov(scratch, FieldOperand(receiver, JSArray::kPropertiesOffset));
+  __ CompareRoot(FieldOperand(scratch, FixedArray::kMapOffset),
+                 Heap::kHashTableMapRootIndex);
+  __ j(equal, &miss);
+
+  // Check that value is a smi.
+  __ JumpIfNotSmi(value, &miss);
+
+  // Prepare tail call to StoreIC_ArrayLength.
+  __ pop(scratch);
+  __ push(receiver);
+  __ push(value);
+  __ push(scratch);  // return address
+
+  ExternalReference ref =
+      ExternalReference(IC_Utility(IC::kStoreIC_ArrayLength), masm->isolate());
+  __ TailCallExternalReference(ref, 2, 1);
+
+  __ bind(&miss);
+
+  StubCompiler::GenerateStoreMiss(masm, kind());
+}
+
+
 void ArgumentsAccessStub::GenerateReadElement(MacroAssembler* masm) {
   // The key is in edx and the parameter count is in eax.