MIPS: Proper support for deopt_every_n_times option on the x64 and ARM architectures.

src/mips/lithium-codegen-mips.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 720 matching lines @@
   ASSERT(environment->HasBeenRegistered());
   int id = environment->deoptimization_index();
   ASSERT(info()->IsOptimizing() || info()->IsStub());
   Address entry =
       Deoptimizer::GetDeoptimizationEntry(isolate(), id, bailout_type);
   if (entry == NULL) {
     Abort(kBailoutWasNotPrepared);
     return;
   }
 
-  ASSERT(FLAG_deopt_every_n_times < 2);  // Other values not supported on MIPS.
-  if (FLAG_deopt_every_n_times == 1 &&
-      !info()->IsStub() &&
-      info()->opt_count() == id) {
-    ASSERT(frame_is_built_);
+  if (FLAG_deopt_every_n_times != 0 && !info()->IsStub()) {
+    Register scratch = scratch0();
+    ExternalReference count = ExternalReference::stress_deopt_count(isolate());
+    Label no_deopt;
+    __ Push(a1, scratch);
+    __ li(scratch, Operand(count));
+    __ lw(a1, MemOperand(scratch));
+    __ Subu(a1, a1, Operand(1));
+    __ Branch(&no_deopt, ne, a1, Operand(zero_reg));
+    __ li(a1, Operand(FLAG_deopt_every_n_times));
+    __ sw(a1, MemOperand(scratch));
+    __ Pop(a1, scratch);
+
     __ Call(entry, RelocInfo::RUNTIME_ENTRY);
-    return;
+    __ bind(&no_deopt);
+    __ sw(a1, MemOperand(scratch));
+    __ Pop(a1, scratch);
   }
 
   if (info()->ShouldTrapOnDeopt()) {
     Label skip;
     if (condition != al) {
       __ Branch(&skip, NegateCondition(condition), src1, src2);
     }
     __ stop("trap_on_deopt");
     __ bind(&skip);
   }
@@ skipping 5093 matching lines @@
   __ Subu(scratch, result, scratch);
   __ lw(result, FieldMemOperand(scratch,
                                 FixedArray::kHeaderSize - kPointerSize));
   __ bind(&done);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal