Move the is_pregenerated flag so it does not overlap other flags.

src/ia32/code-stubs-ia32.cc

Index: src/ia32/code-stubs-ia32.cc
===================================================================
--- src/ia32/code-stubs-ia32.cc	(revision 9462)
+++ src/ia32/code-stubs-ia32.cc	(working copy)
@@ -4415,6 +4415,7 @@
 
 
 void CodeStub::GenerateStubsAheadOfTime() {
+  CEntryStub::GenerateFixedRegStubsAheadOfTime();
   StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime();
   // It is important that the store buffer overflow stubs are generated first.
   RecordWriteStub::GenerateFixedRegStubsAheadOfTime();
@@ -4429,6 +4430,13 @@
 }
 
 
+void CEntryStub::GenerateFixedRegStubsAheadOfTime() {
+  CEntryStub stub(1, kDontSaveFPRegs);
+  Handle<Code> code = stub.GetCode();
+  code->set_is_pregenerated(true);
+}
+
+
 void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) {
   __ Throw(eax);
 }