Refactor elements kind conversion.

src/ia32/ic-ia32.cc

Index: src/ia32/ic-ia32.cc
diff --git a/src/ia32/ic-ia32.cc b/src/ia32/ic-ia32.cc
index 4a12dc8565348535f0004a3395e7067a31415557..62bdc238b4e93143f25844853860e8530a8e3e37 100644
--- a/src/ia32/ic-ia32.cc
+++ b/src/ia32/ic-ia32.cc
@@ -1586,11 +1586,17 @@ void KeyedStoreIC::GenerateTransitionElementsSmiToDouble(MacroAssembler* masm) {
   //  -- esp[0] : return address
   // -----------------------------------
   // Must return the modified receiver in eax.
+  if (!FLAG_trace_elements_transitions) {
+    Label fail;
+    ElementsTransitionGenerator::GenerateSmiOnlyToDouble(masm, &fail);
+    __ mov(eax, edx);
+    __ Ret();
+    __ bind(&fail);
+  }
 
   __ pop(ebx);
   __ push(edx);
   __ push(ebx);  // return address
-
   __ TailCallRuntime(Runtime::kTransitionElementsSmiToDouble, 1, 1);
 }
 
@@ -1602,11 +1608,17 @@ void KeyedStoreIC::GenerateTransitionElementsDoubleToObject(
   //  -- esp[0] : return address
   // -----------------------------------
   // Must return the modified receiver in eax.
+  if (!FLAG_trace_elements_transitions) {
+    Label fail;
+    ElementsTransitionGenerator::GenerateDoubleToObject(masm, &fail);
+    __ mov(eax, edx);
+    __ Ret();
+    __ bind(&fail);
+  }
 
   __ pop(ebx);
   __ push(edx);
   __ push(ebx);  // return address
-
   __ TailCallRuntime(Runtime::kTransitionElementsDoubleToObject, 1, 1);
 }