[stubs] StringToNumberStub --> StringToNumber builtin.

src/x87/code-stubs-x87.cc

Index: src/x87/code-stubs-x87.cc
diff --git a/src/x87/code-stubs-x87.cc b/src/x87/code-stubs-x87.cc
index c833305b04eaed1473b6fa826cc8e26cc0e87fea..1e944ea4e466b4b81773a0c236ad9d3344292773 100644
--- a/src/x87/code-stubs-x87.cc
+++ b/src/x87/code-stubs-x87.cc
@@ -2198,8 +2198,7 @@ void NonNumberToNumberStub::Generate(MacroAssembler* masm) {
   // eax: object
   // edi: object map
   __ j(above_equal, &not_string, Label::kNear);
-  StringToNumberStub stub(masm->isolate());
-  __ TailCallStub(&stub);
+  __ Jump(isolate()->builtins()->StringToNumber(), RelocInfo::CODE_TARGET);
   __ bind(&not_string);
 
   Label not_oddball;
@@ -2215,26 +2214,6 @@ void NonNumberToNumberStub::Generate(MacroAssembler* masm) {
   __ TailCallRuntime(Runtime::kToNumber);
 }
 
-void StringToNumberStub::Generate(MacroAssembler* masm) {
-  // The StringToNumber stub takes one argument in eax.
-  __ AssertString(eax);
-
-  // Check if string has a cached array index.
-  Label runtime;
-  __ test(FieldOperand(eax, String::kHashFieldOffset),
-          Immediate(String::kContainsCachedArrayIndexMask));
-  __ j(not_zero, &runtime, Label::kNear);
-  __ mov(eax, FieldOperand(eax, String::kHashFieldOffset));
-  __ IndexFromHash(eax, eax);
-  __ Ret();
-
-  __ bind(&runtime);
-  __ PopReturnAddressTo(ecx);     // Pop return address.
-  __ Push(eax);                   // Push argument.
-  __ PushReturnAddressFrom(ecx);  // Push return address.
-  __ TailCallRuntime(Runtime::kStringToNumber);
-}
-
 void ToStringStub::Generate(MacroAssembler* masm) {
   // The ToString stub takes one argument in eax.
   Label is_number;