Change lazy compilation stub to a builtin....

src/ia32/builtins-ia32.cc

Index: src/ia32/builtins-ia32.cc
===================================================================
--- src/ia32/builtins-ia32.cc	(revision 5236)
+++ src/ia32/builtins-ia32.cc	(working copy)
@@ -429,6 +429,26 @@
 }
 
 
+void Builtins::Generate_LazyCompile(MacroAssembler* masm) {
+  // Enter an internal frame.
+  __ EnterInternalFrame();
+
+  // Push a copy of the function onto the stack.
+  __ push(edi);
+
+  __ push(edi);  // Function is also the parameter to the runtime call.
+  __ CallRuntime(Runtime::kLazyCompile, 1);
+  __ pop(edi);
+
+  // Tear down temporary frame.
+  __ LeaveInternalFrame();
+
+  // Do a tail-call of the compiled function.
+  __ lea(ecx, FieldOperand(eax, Code::kHeaderSize));
+  __ jmp(Operand(ecx));
+}
+
+
 void Builtins::Generate_FunctionCall(MacroAssembler* masm) {
   // 1. Make sure we have at least one argument.
   { Label done;