A64: Store/restore flags in deopt-every-n-times check

src/a64/lithium-codegen-a64.cc

 // Copyright 2013 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 963 matching lines @@
 
   if (entry == NULL) {
     Abort(kBailoutWasNotPrepared);
     return bailout_type;
   }
 
   if (FLAG_deopt_every_n_times != 0 && !info()->IsStub()) {
     Label not_zero;
     ExternalReference count = ExternalReference::stress_deopt_count(isolate());
 
-    __ Push(x0, x1);
+    __ Push(x0, x1, x2);
+    __ Mrs(x2, NZCV);
     __ Mov(x0, Operand(count));
     __ Ldr(w1, MemOperand(x0));
     __ Subs(x1, x1, 1);
     __ B(gt, &not_zero);
     __ Mov(w1, FLAG_deopt_every_n_times);
     __ Str(w1, MemOperand(x0));
-    __ Pop(x0, x1);
+    __ Pop(x0, x1, x2);
     ASSERT(frame_is_built_);
     __ Call(entry, RelocInfo::RUNTIME_ENTRY);
     __ Unreachable();
 
     __ Bind(&not_zero);
     __ Str(w1, MemOperand(x0));
-    __ Pop(x0, x1);
+    __ Msr(NZCV, x2);
+    __ Pop(x0, x1, x2);
   }
 
   return bailout_type;
 }
 
 
 void LCodeGen::Deoptimize(LEnvironment* environment,
                           Deoptimizer::BailoutType bailout_type) {
   ASSERT(environment->HasBeenRegistered());
   ASSERT(info()->IsOptimizing() || info()->IsStub());
@@ skipping 4684 matching lines @@
   __ Bind(&out_of_object);
   __ Ldr(result, FieldMemOperand(object, JSObject::kPropertiesOffset));
   // Index is equal to negated out of object property index plus 1.
   __ Sub(result, result, Operand::UntagSmiAndScale(index, kPointerSizeLog2));
   __ Ldr(result, FieldMemOperand(result,
                                  FixedArray::kHeaderSize - kPointerSize));
   __ Bind(&done);
 }
 
 } }  // namespace v8::internal