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

src/ia32/code-stubs-ia32.h

 // Copyright 2011 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 46 matching lines @@
 
   Major MajorKey() { return TranscendentalCache; }
   int MinorKey() { return type_ | argument_type_; }
   Runtime::FunctionId RuntimeFunction();
 };
 
 
 class StoreBufferOverflowStub: public PlatformCodeStub {
  public:
   explicit StoreBufferOverflowStub(SaveFPRegsMode save_fp)
-      : save_doubles_(save_fp) { }
+      : save_doubles_(save_fp) {
+    ASSERT(CpuFeatures::IsSafeForSnapshot(SSE2) || save_fp == kDontSaveFPRegs);
+  }
 
   void Generate(MacroAssembler* masm);
 
   virtual bool IsPregenerated() { return true; }
   static void GenerateFixedRegStubsAheadOfTime(Isolate* isolate);
   virtual bool SometimesSetsUpAFrame() { return false; }
 
  private:
   SaveFPRegsMode save_doubles_;
 
@@ skipping 312 matching lines @@
                   RememberedSetAction remembered_set_action,
                   SaveFPRegsMode fp_mode)
       : object_(object),
         value_(value),
         address_(address),
         remembered_set_action_(remembered_set_action),
         save_fp_regs_mode_(fp_mode),
         regs_(object,   // An input reg.
               address,  // An input reg.
               value) {  // One scratch reg.
+    ASSERT(CpuFeatures::IsSafeForSnapshot(SSE2) || fp_mode == kDontSaveFPRegs);
   }
 
   enum Mode {
     STORE_BUFFER_ONLY,
     INCREMENTAL,
     INCREMENTAL_COMPACTION
   };
 
   virtual bool IsPregenerated();
   static void GenerateFixedRegStubsAheadOfTime(Isolate* isolate);
@@ skipping 227 matching lines @@
   Register address_;
   RememberedSetAction remembered_set_action_;
   SaveFPRegsMode save_fp_regs_mode_;
   RegisterAllocation regs_;
 };
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_IA32_CODE_STUBS_IA32_H_