Deoptimized by soft deoptimize should not affect the opt count

src/x64/lithium-codegen-x64.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 695 matching lines @@
     int deoptimization_index = deoptimizations_.length();
     int pc_offset = masm()->pc_offset();
     environment->Register(deoptimization_index,
                           translation.index(),
                           (mode == Safepoint::kLazyDeopt) ? pc_offset : -1);
     deoptimizations_.Add(environment, environment->zone());
   }
 }
 
 
-void LCodeGen::DeoptimizeIf(Condition cc, LEnvironment* environment) {
+void LCodeGen::DeoptimizeIf(Condition cc, LEnvironment* environment,
+                            bool soft_deopt) {
   RegisterEnvironmentForDeoptimization(environment, Safepoint::kNoLazyDeopt);
   ASSERT(environment->HasBeenRegistered());
   int id = environment->deoptimization_index();
   ASSERT(info()->IsOptimizing() || info()->IsStub());
   Deoptimizer::BailoutType bailout_type = info()->IsStub()
       ? Deoptimizer::LAZY
       : Deoptimizer::EAGER;
   Address entry =
       Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type);
   if (entry == NULL) {
     Abort("bailout was not prepared");
     return;
   }
 
+  if (soft_deopt) {
+    // It's better soft deopt does not waste the opt count
+    Handle<SharedFunctionInfo> shared(info()->shared_info());
+    __ pushfq();
+    __ push(rax);
+    __ push(rbx);
+    __ movq(rbx, shared, RelocInfo::EMBEDDED_OBJECT);
+    __ movq(rax,
+           FieldOperand(rbx, SharedFunctionInfo::kOptCountOffset));
+    __ SmiSubConstant(rax, rax, Smi::FromInt(1));
+    __ movq(FieldOperand(rbx, SharedFunctionInfo::kOptCountOffset),
+           rax);
+    __ pop(rbx);
+    __ pop(rax);
+    __ popfq();
+  }
+
   ASSERT(FLAG_deopt_every_n_times == 0);  // Not yet implemented on x64.
 
   if (FLAG_trap_on_deopt) {
     Label done;
     if (cc != no_condition) {
       __ j(NegateCondition(cc), &done, Label::kNear);
     }
     __ int3();
     __ bind(&done);
   }
@@ skipping 4747 matching lines @@
   EnsureSpaceForLazyDeopt(Deoptimizer::patch_size());
   last_lazy_deopt_pc_ = masm()->pc_offset();
   ASSERT(instr->HasEnvironment());
   LEnvironment* env = instr->environment();
   RegisterEnvironmentForDeoptimization(env, Safepoint::kLazyDeopt);
   safepoints_.RecordLazyDeoptimizationIndex(env->deoptimization_index());
 }
 
 
 void LCodeGen::DoDeoptimize(LDeoptimize* instr) {
-  DeoptimizeIf(no_condition, instr->environment());
+  DeoptimizeIf(no_condition, instr->environment(), instr->is_soft_deopt());
 }
 
 
 void LCodeGen::DoDummyUse(LDummyUse* instr) {
   // Nothing to see here, move on!
 }
 
 
 void LCodeGen::DoDeleteProperty(LDeleteProperty* instr) {
   LOperand* obj = instr->object();
@@ skipping 188 matching lines @@
                                FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64