Enable stub generation using Hydrogen/Lithium (again)

src/ia32/macro-assembler-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 1778 matching lines @@
 
 void MacroAssembler::CallRuntime(Runtime::FunctionId id, int num_arguments) {
   CallRuntime(Runtime::FunctionForId(id), num_arguments);
 }
 
 
 void MacroAssembler::CallRuntimeSaveDoubles(Runtime::FunctionId id) {
   const Runtime::Function* function = Runtime::FunctionForId(id);
   Set(eax, Immediate(function->nargs));
   mov(ebx, Immediate(ExternalReference(function, isolate())));
-  CEntryStub ces(1, kSaveFPRegs);
+  CEntryStub ces(1, CpuFeatures::IsSupported(SSE2)
+                 ? kSaveFPRegs :
+                 kDontSaveFPRegs);
   CallStub(&ces);
 }
 
 
 void MacroAssembler::CallRuntime(const Runtime::Function* f,
                                  int num_arguments) {
   // If the expected number of arguments of the runtime function is
   // constant, we check that the actual number of arguments match the
   // expectation.
   if (f->nargs >= 0 && f->nargs != num_arguments) {
@@ skipping 1167 matching lines @@
   j(not_equal, call_runtime);
 
   mov(ecx, FieldOperand(ebx, Map::kPrototypeOffset));
   cmp(ecx, isolate()->factory()->null_value());
   j(not_equal, &next);
 }
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_IA32