[stubs] Implement fast TF Builtin for Object.create

src/compiler/code-assembler.cc

Index: src/compiler/code-assembler.cc
diff --git a/src/compiler/code-assembler.cc b/src/compiler/code-assembler.cc
index 285259ffcd8e52b252e11d8cc1ab458473c7f1fb..6b5e03667fcc7751d9a1b21edc256ad8c177fb55 100644
--- a/src/compiler/code-assembler.cc
+++ b/src/compiler/code-assembler.cc
@@ -220,6 +220,13 @@ Node* CodeAssembler::Word32Shr(Node* value, int shift) {
                       : value;
 }
 
+Node* CodeAssembler::IsWordAligned(Node* value) {
+  /* return WordNotEqual(IntPtrConstant(0), */

[Igor Sheludko, 2016/10/18 14:22:18]

?

+  /*           WordAnd(value, IntPtrConstant((1 << kPointerSizeLog2)-1))); */
+  return WordEqual(value,
+                   WordShl(WordShr(value, kPointerSizeLog2), kPointerSizeLog2));
+}
+
 Node* CodeAssembler::ChangeUint32ToWord(Node* value) {
   if (raw_assembler_->machine()->Is64()) {
     value = raw_assembler_->ChangeUint32ToUint64(value);