Deoptimization support for accessors.

src/deoptimizer.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 571 matching lines @@
       case Translation::JS_FRAME:
         DoComputeJSFrame(&iterator, i);
         jsframe_count_++;
         break;
       case Translation::ARGUMENTS_ADAPTOR_FRAME:
         DoComputeArgumentsAdaptorFrame(&iterator, i);
         break;
       case Translation::CONSTRUCT_STUB_FRAME:
         DoComputeConstructStubFrame(&iterator, i);
         break;
-      default:
+      case Translation::SETTER_STUB_FRAME:
+        DoComputeSetterStubFrame(&iterator, i);
+        break;
+      case Translation::BEGIN:
+      case Translation::REGISTER:
+      case Translation::INT32_REGISTER:
+      case Translation::DOUBLE_REGISTER:
+      case Translation::STACK_SLOT:
+      case Translation::INT32_STACK_SLOT:
+      case Translation::DOUBLE_STACK_SLOT:
+      case Translation::LITERAL:
+      case Translation::ARGUMENTS_OBJECT:
+      case Translation::DUPLICATE:
         UNREACHABLE();
         break;
     }
   }
 
   // Print some helpful diagnostic information.
   if (FLAG_trace_deopt) {
     double ms = static_cast<double>(OS::Ticks() - start) / 1000;
     int index = output_count_ - 1;  // Index of the topmost frame.
     JSFunction* function = output_[index]->GetFunction();
@@ skipping 98 matching lines @@
     opcode = static_cast<Translation::Opcode>(iterator->Next());
     iterator->Skip(Translation::NumberOfOperandsFor(opcode));
     opcode = static_cast<Translation::Opcode>(iterator->Next());
   }
 
   switch (opcode) {
     case Translation::BEGIN:
     case Translation::JS_FRAME:
     case Translation::ARGUMENTS_ADAPTOR_FRAME:
     case Translation::CONSTRUCT_STUB_FRAME:
+    case Translation::SETTER_STUB_FRAME:
     case Translation::DUPLICATE:
       UNREACHABLE();
       return;
 
     case Translation::REGISTER: {
       int input_reg = iterator->Next();
       intptr_t input_value = input_->GetRegister(input_reg);
       if (FLAG_trace_deopt) {
         PrintF(
             "    0x%08" V8PRIxPTR ": [top + %d] <- 0x%08" V8PRIxPTR " ; %s ",
@@ skipping 167 matching lines @@
   bool duplicate = (opcode == Translation::DUPLICATE);
   if (duplicate) {
     opcode = static_cast<Translation::Opcode>(iterator->Next());
   }
 
   switch (opcode) {
     case Translation::BEGIN:
     case Translation::JS_FRAME:
     case Translation::ARGUMENTS_ADAPTOR_FRAME:
     case Translation::CONSTRUCT_STUB_FRAME:
+    case Translation::SETTER_STUB_FRAME:
     case Translation::DUPLICATE:
       UNREACHABLE();  // Malformed input.
        return false;
 
      case Translation::REGISTER: {
        int output_reg = iterator->Next();
        if (FLAG_trace_osr) {
          PrintF("    %s <- 0x%08" V8PRIxPTR " ; [sp + %d]\n",
                 converter.NameOfCPURegister(output_reg),
                 input_value,
@@ skipping 435 matching lines @@
 }
 
 
 void Translation::BeginConstructStubFrame(int literal_id, unsigned height) {
   buffer_->Add(CONSTRUCT_STUB_FRAME, zone());
   buffer_->Add(literal_id, zone());
   buffer_->Add(height, zone());
 }
 
 
+void Translation::BeginSetterStubFrame(int literal_id) {
+  buffer_->Add(SETTER_STUB_FRAME, zone());
+  buffer_->Add(literal_id, zone());
+}
+
+
 void Translation::BeginArgumentsAdaptorFrame(int literal_id, unsigned height) {
   buffer_->Add(ARGUMENTS_ADAPTOR_FRAME, zone());
   buffer_->Add(literal_id, zone());
   buffer_->Add(height, zone());
 }
 
 
 void Translation::BeginJSFrame(BailoutId node_id,
                                int literal_id,
                                unsigned height) {
@@ skipping 54 matching lines @@
 void Translation::MarkDuplicate() {
   buffer_->Add(DUPLICATE, zone());
 }
 
 
 int Translation::NumberOfOperandsFor(Opcode opcode) {
   switch (opcode) {
     case ARGUMENTS_OBJECT:
     case DUPLICATE:
       return 0;
+    case SETTER_STUB_FRAME:
     case REGISTER:
     case INT32_REGISTER:
     case DOUBLE_REGISTER:
     case STACK_SLOT:
     case INT32_STACK_SLOT:
     case DOUBLE_STACK_SLOT:
     case LITERAL:
       return 1;
     case BEGIN:
     case ARGUMENTS_ADAPTOR_FRAME:
@@ skipping 12 matching lines @@
 const char* Translation::StringFor(Opcode opcode) {
   switch (opcode) {
     case BEGIN:
       return "BEGIN";
     case JS_FRAME:
       return "JS_FRAME";
     case ARGUMENTS_ADAPTOR_FRAME:
       return "ARGUMENTS_ADAPTOR_FRAME";
     case CONSTRUCT_STUB_FRAME:
       return "CONSTRUCT_STUB_FRAME";
+    case SETTER_STUB_FRAME:
+      return "SETTER_STUB_FRAME";
     case REGISTER:
       return "REGISTER";
     case INT32_REGISTER:
       return "INT32_REGISTER";
     case DOUBLE_REGISTER:
       return "DOUBLE_REGISTER";
     case STACK_SLOT:
       return "STACK_SLOT";
     case INT32_STACK_SLOT:
       return "INT32_STACK_SLOT";
@@ skipping 36 matching lines @@
                                             DeoptimizationInputData* data,
                                             JavaScriptFrame* frame) {
   Translation::Opcode opcode =
       static_cast<Translation::Opcode>(iterator->Next());
 
   switch (opcode) {
     case Translation::BEGIN:
     case Translation::JS_FRAME:
     case Translation::ARGUMENTS_ADAPTOR_FRAME:
     case Translation::CONSTRUCT_STUB_FRAME:
+    case Translation::SETTER_STUB_FRAME:
       // Peeled off before getting here.
       break;
 
     case Translation::ARGUMENTS_OBJECT:
       // This can be only emitted for local slots not for argument slots.
       break;
 
     case Translation::REGISTER:
     case Translation::INT32_REGISTER:
     case Translation::DOUBLE_REGISTER:
@@ skipping 148 matching lines @@
 
 void DeoptimizedFrameInfo::Iterate(ObjectVisitor* v) {
   v->VisitPointer(BitCast<Object**>(&function_));
   v->VisitPointers(parameters_, parameters_ + parameters_count_);
   v->VisitPointers(expression_stack_, expression_stack_ + expression_count_);
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal