MIPS: Generalize calling to C++ on stub deopt

src/mips/deoptimizer-mips.cc

 // Copyright 2011 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 433 matching lines @@
   output_frame->SetPc(pc);
 }
 
 
 void Deoptimizer::DoCompiledStubFrame(TranslationIterator* iterator,
                                       int frame_index) {
   //
   //               FROM                                  TO             <-fp
   //    |          ....           |          |          ....           |
   //    +-------------------------+          +-------------------------+
-  //    | JSFunction continuation |          | JSFunction continuation |
+  //    | JSFunction continuation |          |       parameter 1       |
+  //    +-------------------------+          +-------------------------+
+  // |  |   saved frame (fp)      |          |          ....           |
+  // |  +=========================+<-fp      +-------------------------+
+  // |  |   JSFunction context    |          |       parameter n       |
+  // v  +-------------------------+          +-------------------------|
+  //    |   COMPILED_STUB marker  |          | JSFunction continuation |
   //    +-------------------------+          +-------------------------+<-sp
-  // |  |   saved frame (fp)      |
-  // |  +=========================+<-fp
-  // |  |   JSFunction context    |
-  // v  +-------------------------+
-  //    |   COMPILED_STUB marker  |          fp = saved frame
-  //    +-------------------------+          f8 = JSFunction context
-  //    |                         |
-  //    | ...                     |
-  //    |                         |
-  //    +-------------------------+<-sp
+  //    |                         |          a0 = number of parameters
+  //    | ...                     |          a1 = failure handler address
+  //    |                         |          fp = saved frame
+  //    +-------------------------+<-sp      cp = JSFunction context
   //
   //
-  int output_frame_size = 1 * kPointerSize;
-  FrameDescription* output_frame =
-      new(output_frame_size) FrameDescription(output_frame_size, 0);
-  Code* notify_miss =
-      isolate_->builtins()->builtin(Builtins::kNotifyICMiss);
-  output_frame->SetState(Smi::FromInt(FullCodeGenerator::NO_REGISTERS));
-  output_frame->SetContinuation(
-      reinterpret_cast<intptr_t>(notify_miss->entry()));
 
   ASSERT(compiled_code_->kind() == Code::COMPILED_STUB);
   int major_key = compiled_code_->major_key();
   CodeStubInterfaceDescriptor* descriptor =
       isolate_->code_stub_interface_descriptor(major_key);
-  Handle<Code> miss_ic(descriptor->deoptimization_handler_);
-  output_frame->SetPc(reinterpret_cast<intptr_t>(miss_ic->instruction_start()));
+
+  int output_frame_size =
+      (1 + descriptor->register_param_count_) * kPointerSize;
+  FrameDescription* output_frame =
+      new(output_frame_size) FrameDescription(output_frame_size, 0);
+  Code* notify_failure =
+      isolate_->builtins()->builtin(Builtins::kNotifyStubFailure);
+  output_frame->SetState(Smi::FromInt(FullCodeGenerator::NO_REGISTERS));
+  output_frame->SetContinuation(
+      reinterpret_cast<uint32_t>(notify_failure->entry()));
+
+  Code* code;
+  CEntryStub(1, kSaveFPRegs).FindCodeInCache(&code, isolate_);
+  output_frame->SetPc(reinterpret_cast<intptr_t>(code->instruction_start()));
   unsigned input_frame_size = input_->GetFrameSize();
   intptr_t value = input_->GetFrameSlot(input_frame_size - kPointerSize);
   output_frame->SetFrameSlot(0, value);
   value = input_->GetFrameSlot(input_frame_size - 2 * kPointerSize);
   output_frame->SetRegister(fp.code(), value);
   output_frame->SetFp(value);
   value = input_->GetFrameSlot(input_frame_size - 3 * kPointerSize);
   output_frame->SetRegister(cp.code(), value);
 
-  Translation::Opcode opcode =
-      static_cast<Translation::Opcode>(iterator->Next());
-  ASSERT(opcode == Translation::REGISTER);
-  USE(opcode);
-  int input_reg = iterator->Next();
-  intptr_t input_value = input_->GetRegister(input_reg);
-  output_frame->SetRegister(a1.code(), input_value);
+  int parameter_offset = kPointerSize * descriptor->register_param_count_;
+  for (int i = 0; i < descriptor->register_param_count_; ++i) {
+    Translation::Opcode opcode =
+        static_cast<Translation::Opcode>(iterator->Next());
+    ASSERT(opcode == Translation::REGISTER);
+    USE(opcode);
+    int input_reg = iterator->Next();
+    intptr_t reg_value = input_->GetRegister(input_reg);
+    output_frame->SetFrameSlot(parameter_offset, reg_value);
+    parameter_offset -= kPointerSize;
+  }
 
-  int32_t next = iterator->Next();
-  opcode = static_cast<Translation::Opcode>(next);
-  ASSERT(opcode == Translation::REGISTER);
-  input_reg = iterator->Next();
-  input_value = input_->GetRegister(input_reg);
-  output_frame->SetRegister(a0.code(), input_value);
+  ApiFunction function(descriptor->deoptimization_handler_);
+  ExternalReference xref(&function, ExternalReference::BUILTIN_CALL, isolate_);
+  intptr_t handler = reinterpret_cast<intptr_t>(xref.address());
+  output_frame->SetRegister(s0.code(), descriptor->register_param_count_);
+  output_frame->SetRegister(s1.code(),
+      (descriptor->register_param_count_ - 1) * kPointerSize);
+  output_frame->SetRegister(s2.code(), handler);
 
   ASSERT(frame_index == 0);
   output_[frame_index] = output_frame;
 }
 
 
 void Deoptimizer::DoComputeConstructStubFrame(TranslationIterator* iterator,
                                               int frame_index) {
   Builtins* builtins = isolate_->builtins();
   Code* construct_stub = builtins->builtin(Builtins::kJSConstructStubGeneric);
@@ skipping 681 matching lines @@
   }
 
   ASSERT_EQ(masm()->SizeOfCodeGeneratedSince(&table_start),
       count() * table_entry_size_);
 }
 
 #undef __
 
 
 } }  // namespace v8::internal