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

src/ia32/code-stubs-ia32.h

Index: src/ia32/code-stubs-ia32.h
diff --git a/src/ia32/code-stubs-ia32.h b/src/ia32/code-stubs-ia32.h
index 9d5c0beeaef428eb047aeaf42e87cf51c336e7c6..c2ae5f0faed566d6f36bcbe871e65a11cd2d7523 100644
--- a/src/ia32/code-stubs-ia32.h
+++ b/src/ia32/code-stubs-ia32.h
@@ -64,7 +64,9 @@ class TranscendentalCacheStub: public PlatformCodeStub {
 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);
 
@@ -397,6 +399,7 @@ class RecordWriteStub: public PlatformCodeStub {
         regs_(object,   // An input reg.
               address,  // An input reg.
               value) {  // One scratch reg.
+    ASSERT(CpuFeatures::IsSafeForSnapshot(SSE2) || fp_mode == kDontSaveFPRegs);
   }
 
   enum Mode {