Revert "Turn the NumberToStringStub into a hydrogen stub."

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 83613ccc86a041c8a360232cacee3c76eee09698..6128633729493f8ba927d621722dbe065cb64893 100644
--- a/src/ia32/code-stubs-ia32.cc
+++ b/src/ia32/code-stubs-ia32.cc
@@ -64,16 +64,6 @@ void ToNumberStub::InitializeInterfaceDescriptor(
 }
 
 
-void NumberToStringStub::InitializeInterfaceDescriptor(
-    Isolate* isolate,
-    CodeStubInterfaceDescriptor* descriptor) {
-  static Register registers[] = { eax };
-  descriptor->register_param_count_ = 1;
-  descriptor->register_params_ = registers;
-  descriptor->deoptimization_handler_ = NULL;
-}
-
-
 void FastCloneShallowArrayStub::InitializeInterfaceDescriptor(
     Isolate* isolate,
     CodeStubInterfaceDescriptor* descriptor) {
@@ -3777,6 +3767,21 @@ void RegExpConstructResultStub::Generate(MacroAssembler* masm) {
 }
 
 
+void NumberToStringStub::Generate(MacroAssembler* masm) {
+  Label runtime;
+
+  __ mov(ebx, Operand(esp, kPointerSize));
+
+  // Generate code to lookup number in the number string cache.
+  __ LookupNumberStringCache(ebx, eax, ecx, edx, &runtime);
+  __ ret(1 * kPointerSize);
+
+  __ bind(&runtime);
+  // Handle number to string in the runtime system if not found in the cache.
+  __ TailCallRuntime(Runtime::kNumberToStringSkipCache, 1, 1);
+}
+
+
 static int NegativeComparisonResult(Condition cc) {
   ASSERT(cc != equal);
   ASSERT((cc == less) || (cc == less_equal)