[stubs] StringToNumberStub --> StringToNumber builtin.

src/arm64/code-stubs-arm64.cc

Index: src/arm64/code-stubs-arm64.cc
diff --git a/src/arm64/code-stubs-arm64.cc b/src/arm64/code-stubs-arm64.cc
index 2658b86a73fb8843305bf54fa68cb6664b4a7cfc..8788f19b274b0b5b3c06fc75b5d38a3d3f5de596 100644
--- a/src/arm64/code-stubs-arm64.cc
+++ b/src/arm64/code-stubs-arm64.cc
@@ -3130,8 +3130,7 @@ void NonNumberToNumberStub::Generate(MacroAssembler* masm) {
   // x0: receiver
   // x1: receiver instance type
   __ B(hs, &not_string);
-  StringToNumberStub stub(masm->isolate());
-  __ TailCallStub(&stub);
+  __ Jump(isolate()->builtins()->StringToNumber(), RelocInfo::CODE_TARGET);
   __ Bind(&not_string);
 
   Label not_oddball;
@@ -3145,23 +3144,6 @@ void NonNumberToNumberStub::Generate(MacroAssembler* masm) {
   __ TailCallRuntime(Runtime::kToNumber);
 }
 
-void StringToNumberStub::Generate(MacroAssembler* masm) {
-  // The StringToNumber stub takes one argument in x0.
-  __ AssertString(x0);
-
-  // Check if string has a cached array index.
-  Label runtime;
-  __ Ldr(x2, FieldMemOperand(x0, String::kHashFieldOffset));
-  __ Tst(x2, Operand(String::kContainsCachedArrayIndexMask));
-  __ B(ne, &runtime);
-  __ IndexFromHash(x2, x0);
-  __ Ret();
-
-  __ Bind(&runtime);
-  __ Push(x0);  // Push argument.
-  __ TailCallRuntime(Runtime::kStringToNumber);
-}
-
 void ToStringStub::Generate(MacroAssembler* masm) {
   // The ToString stub takes one argument in x0.
   Label is_number;