Provide baseline for new GC infrastructure.

src/ia32/stub-cache-ia32.cc

Index: src/ia32/stub-cache-ia32.cc
diff --git a/src/ia32/stub-cache-ia32.cc b/src/ia32/stub-cache-ia32.cc
index 352eae1f927577d815d76c7089df232c6dfdb627..111844c207500bb8feb5ba963bc5c42b38054326 100644
--- a/src/ia32/stub-cache-ia32.cc
+++ b/src/ia32/stub-cache-ia32.cc
@@ -1503,19 +1503,23 @@ MaybeObject* CallStubCompiler::CompileArrayPushCall(Object* object,
       __ mov(ecx, Operand(esp, argc * kPointerSize));
       __ mov(Operand(edx, 0), ecx);
 
-      // Check if value is a smi.
-      __ test(ecx, Immediate(kSmiTagMask));
-      __ j(not_zero, &with_write_barrier);
+      if (!FLAG_new_gc) {
+        // Check if value is a smi.
+        __ test(ecx, Immediate(kSmiTagMask));
+        __ j(not_zero, &with_write_barrier);
+      }
 
       __ bind(&exit);
       __ ret((argc + 1) * kPointerSize);
 
-      __ bind(&with_write_barrier);
+      if (!FLAG_new_gc) {
+        __ bind(&with_write_barrier);
 
-      __ InNewSpace(ebx, ecx, equal, &exit);
+        __ InNewSpace(ebx, ecx, equal, &exit);
 
-      __ RecordWriteHelper(ebx, edx, ecx);
-      __ ret((argc + 1) * kPointerSize);
+        __ RecordWriteHelper(ebx, edx, ecx);
+        __ ret((argc + 1) * kPointerSize);
+      }
 
       __ bind(&attempt_to_grow_elements);
       if (!FLAG_inline_new) {