Make sure that on x86 we don't generate SSE2 code in the snapshot.

src/ia32/code-stubs-ia32.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 7498 matching lines @@
         save_fp_regs_mode_ == kDontSaveFPRegs) {
       return true;
     }
   }
   return false;
 }
 
 
 void StoreBufferOverflowStub::GenerateFixedRegStubsAheadOfTime(
     Isolate* isolate) {
-  StoreBufferOverflowStub stub1(kDontSaveFPRegs);
-  stub1.GetCode(isolate)->set_is_pregenerated(true);
-
-  CpuFeatures::TryForceFeatureScope scope(SSE2);
-  if (CpuFeatures::IsSupported(SSE2)) {
+  StoreBufferOverflowStub stub(kDontSaveFPRegs);
+  stub.GetCode(isolate)->set_is_pregenerated(true);
+  if (CpuFeatures::IsSafeForSnapshot(SSE2)) {
     StoreBufferOverflowStub stub2(kSaveFPRegs);
     stub2.GetCode(isolate)->set_is_pregenerated(true);
   }
 }
 
 
 void RecordWriteStub::GenerateFixedRegStubsAheadOfTime(Isolate* isolate) {
   for (const AheadOfTimeWriteBarrierStubList* entry = kAheadOfTime;
        !entry->object.is(no_reg);
        entry++) {
@@ skipping 339 matching lines @@
   // Restore ecx.
   __ pop(ecx);
   __ ret(0);
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32