MIPS: Re-land Crankshaft-generated KeyedLoad stubs.

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 188 matching lines @@
       if (value == 1) return i;
     }
   }
   UNREACHABLE();
   return -1;
 }
 
 
 void Deoptimizer::DoComputeOsrOutputFrame() {
   DeoptimizationInputData* data = DeoptimizationInputData::cast(
-      optimized_code_->deoptimization_data());
+      compiled_code_->deoptimization_data());
   unsigned ast_id = data->OsrAstId()->value();
 
   int bailout_id = LookupBailoutId(data, BailoutId(ast_id));
   unsigned translation_index = data->TranslationIndex(bailout_id)->value();
   ByteArray* translations = data->TranslationByteArray();
 
   TranslationIterator iterator(translations, translation_index);
   Translation::Opcode opcode =
       static_cast<Translation::Opcode>(iterator.Next());
   ASSERT(Translation::BEGIN == opcode);
@@ skipping 13 matching lines @@
   USE(closure_id);
   ASSERT_EQ(Translation::kSelfLiteralId, closure_id);
   unsigned height = iterator.Next();
   unsigned height_in_bytes = height * kPointerSize;
   USE(height_in_bytes);
 
   unsigned fixed_size = ComputeFixedSize(function_);
   unsigned input_frame_size = input_->GetFrameSize();
   ASSERT(fixed_size + height_in_bytes == input_frame_size);
 
-  unsigned stack_slot_size = optimized_code_->stack_slots() * kPointerSize;
+  unsigned stack_slot_size = compiled_code_->stack_slots() * kPointerSize;
   unsigned outgoing_height = data->ArgumentsStackHeight(bailout_id)->value();
   unsigned outgoing_size = outgoing_height * kPointerSize;
   unsigned output_frame_size = fixed_size + stack_slot_size + outgoing_size;
   ASSERT(outgoing_size == 0);  // OSR does not happen in the middle of a call.
 
   if (FLAG_trace_osr) {
     PrintF("[on-stack replacement: begin 0x%08" V8PRIxPTR " ",
            reinterpret_cast<intptr_t>(function_));
     function_->PrintName();
     PrintF(" => node=%u, frame=%d->%d]\n",
@@ skipping 71 matching lines @@
     delete output_[0];
     output_[0] = input_;
     output_[0]->SetPc(reinterpret_cast<uint32_t>(from_));
   } else {
     // Set up the frame pointer and the context pointer.
     output_[0]->SetRegister(fp.code(), input_->GetRegister(fp.code()));
     output_[0]->SetRegister(cp.code(), input_->GetRegister(cp.code()));
 
     unsigned pc_offset = data->OsrPcOffset()->value();
     uint32_t pc = reinterpret_cast<uint32_t>(
-        optimized_code_->entry() + pc_offset);
+        compiled_code_->entry() + pc_offset);
     output_[0]->SetPc(pc);
   }
   Code* continuation = isolate_->builtins()->builtin(Builtins::kNotifyOSR);
   output_[0]->SetContinuation(
       reinterpret_cast<uint32_t>(continuation->entry()));
 
   if (FLAG_trace_osr) {
     PrintF("[on-stack replacement translation %s: 0x%08" V8PRIxPTR " ",
            ok ? "finished" : "aborted",
            reinterpret_cast<intptr_t>(function_));
@@ skipping 92 matching lines @@
   Builtins* builtins = isolate_->builtins();
   Code* adaptor_trampoline =
       builtins->builtin(Builtins::kArgumentsAdaptorTrampoline);
   uint32_t pc = reinterpret_cast<uint32_t>(
       adaptor_trampoline->instruction_start() +
       isolate_->heap()->arguments_adaptor_deopt_pc_offset()->value());
   output_frame->SetPc(pc);
 }
 
 
+void Deoptimizer::DoCompiledStubFrame(TranslationIterator* iterator,
+                                      int frame_index) {
+  //
+  //               FROM                                  TO             <-fp
+  //    |          ....           |          |          ....           |
+  //    +-------------------------+          +-------------------------+
+  //    | JSFunction continuation |          | JSFunction continuation |
+  //    +-------------------------+          +-------------------------+<-sp
+  // |  |   saved frame (fp)      |
+  // |  +=========================+<-fp
+  // |  |   JSFunction context    |
+  // v  +-------------------------+
+  //    |   COMPILED_STUB marker  |          fp = saved frame
+  //    +-------------------------+          f8 = JSFunction context
+  //    |                         |
+  //    | ...                     |
+  //    |                         |
+  //    +-------------------------+<-sp
+  //
+  //
+  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()));
+  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);
+
+  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);
+
+  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);
   JSFunction* function = JSFunction::cast(ComputeLiteral(iterator->Next()));
   unsigned height = iterator->Next();
   unsigned height_in_bytes = height * kPointerSize;
   if (FLAG_trace_deopt) {
     PrintF("  translating construct stub => height=%d\n", height_in_bytes);
   }
@@ skipping 403 matching lines @@
 void Deoptimizer::FillInputFrame(Address tos, JavaScriptFrame* frame) {
   // Set the register values. The values are not important as there are no
   // callee saved registers in JavaScript frames, so all registers are
   // spilled. Registers fp and sp are set to the correct values though.
 
   for (int i = 0; i < Register::kNumRegisters; i++) {
     input_->SetRegister(i, i * 4);
   }
   input_->SetRegister(sp.code(), reinterpret_cast<intptr_t>(frame->sp()));
   input_->SetRegister(fp.code(), reinterpret_cast<intptr_t>(frame->fp()));
-  for (int i = 0; i < DoubleRegister::kNumAllocatableRegisters; i++) {
+  for (int i = 0; i < DoubleRegister::NumAllocatableRegisters(); i++) {
     input_->SetDoubleRegister(i, 0.0);
   }
 
   // Fill the frame content from the actual data on the frame.
   for (unsigned i = 0; i < input_->GetFrameSize(); i += kPointerSize) {
     input_->SetFrameSlot(i, Memory::uint32_at(tos + i));
   }
 }
 
 
 #define __ masm()->
 
 
 // This code tries to be close to ia32 code so that any changes can be
 // easily ported.
 void Deoptimizer::EntryGenerator::Generate() {
   GeneratePrologue();
 
   Isolate* isolate = masm()->isolate();
 
-  CpuFeatures::Scope scope(FPU);
   // Unlike on ARM we don't save all the registers, just the useful ones.
   // For the rest, there are gaps on the stack, so the offsets remain the same.
   const int kNumberOfRegisters = Register::kNumRegisters;
 
   RegList restored_regs = kJSCallerSaved | kCalleeSaved;
   RegList saved_regs = restored_regs | sp.bit() | ra.bit();
 
   const int kDoubleRegsSize =
-      kDoubleSize * FPURegister::kNumAllocatableRegisters;
+      kDoubleSize * FPURegister::kMaxNumAllocatableRegisters;
 
-  // Save all FPU registers before messing with them.
-  __ Subu(sp, sp, Operand(kDoubleRegsSize));
-  for (int i = 0; i < FPURegister::kNumAllocatableRegisters; ++i) {
-    FPURegister fpu_reg = FPURegister::FromAllocationIndex(i);
-    int offset = i * kDoubleSize;
-    __ sdc1(fpu_reg, MemOperand(sp, offset));
+  if (CpuFeatures::IsSupported(FPU)) {
+    CpuFeatures::Scope scope(FPU);
+    // Save all FPU registers before messing with them.
+    __ Subu(sp, sp, Operand(kDoubleRegsSize));
+    for (int i = 0; i < FPURegister::kMaxNumAllocatableRegisters; ++i) {
+      FPURegister fpu_reg = FPURegister::FromAllocationIndex(i);
+      int offset = i * kDoubleSize;
+      __ sdc1(fpu_reg, MemOperand(sp, offset));
+    }
+  } else {
+    __ Subu(sp, sp, Operand(kDoubleRegsSize));
   }
 
   // Push saved_regs (needed to populate FrameDescription::registers_).
   // Leave gaps for other registers.
   __ Subu(sp, sp, kNumberOfRegisters * kPointerSize);
   for (int16_t i = kNumberOfRegisters - 1; i >= 0; i--) {
     if ((saved_regs & (1 << i)) != 0) {
       __ sw(ToRegister(i), MemOperand(sp, kPointerSize * i));
     }
   }
@@ skipping 51 matching lines @@
     int offset = (i * kPointerSize) + FrameDescription::registers_offset();
     if ((saved_regs & (1 << i)) != 0) {
       __ lw(a2, MemOperand(sp, i * kPointerSize));
       __ sw(a2, MemOperand(a1, offset));
     } else if (FLAG_debug_code) {
       __ li(a2, kDebugZapValue);
       __ sw(a2, MemOperand(a1, offset));
     }
   }
 
-  // Copy FPU registers to
-  // double_registers_[DoubleRegister::kNumAllocatableRegisters]
-  int double_regs_offset = FrameDescription::double_registers_offset();
-  for (int i = 0; i < FPURegister::kNumAllocatableRegisters; ++i) {
-    int dst_offset = i * kDoubleSize + double_regs_offset;
-    int src_offset = i * kDoubleSize + kNumberOfRegisters * kPointerSize;
-    __ ldc1(f0, MemOperand(sp, src_offset));
-    __ sdc1(f0, MemOperand(a1, dst_offset));
+  if (CpuFeatures::IsSupported(FPU)) {
+    CpuFeatures::Scope scope(FPU);
+    // Copy FPU registers to
+    // double_registers_[DoubleRegister::kNumAllocatableRegisters]
+    int double_regs_offset = FrameDescription::double_registers_offset();
+    for (int i = 0; i < FPURegister::NumAllocatableRegisters(); ++i) {
+      int dst_offset = i * kDoubleSize + double_regs_offset;
+      int src_offset = i * kDoubleSize + kNumberOfRegisters * kPointerSize;
+      __ ldc1(f0, MemOperand(sp, src_offset));
+      __ sdc1(f0, MemOperand(a1, dst_offset));
+    }
   }
 
   // Remove the bailout id, eventually return address, and the saved registers
   // from the stack.
   if (type() == EAGER || type() == OSR) {
     __ Addu(sp, sp, Operand(kSavedRegistersAreaSize + (1 * kPointerSize)));
   } else {
     __ Addu(sp, sp, Operand(kSavedRegistersAreaSize + (2 * kPointerSize)));
   }
 
   // Compute a pointer to the unwinding limit in register a2; that is
   // the first stack slot not part of the input frame.
   __ lw(a2, MemOperand(a1, FrameDescription::frame_size_offset()));
   __ Addu(a2, a2, sp);
 
   // Unwind the stack down to - but not including - the unwinding
   // limit and copy the contents of the activation frame to the input
   // frame description.
   __ Addu(a3, a1, Operand(FrameDescription::frame_content_offset()));
   Label pop_loop;
+  Label pop_loop_header;
+  __ Branch(&pop_loop_header);
   __ bind(&pop_loop);
   __ pop(t0);
   __ sw(t0, MemOperand(a3, 0));
-  __ Branch(USE_DELAY_SLOT, &pop_loop, ne, a2, Operand(sp));
-  __ addiu(a3, a3, sizeof(uint32_t));  // In delay slot.
+  __ addiu(a3, a3, sizeof(uint32_t));
+  __ bind(&pop_loop_header);
+  __ Branch(&pop_loop, ne, a2, Operand(sp));
 
   // Compute the output frame in the deoptimizer.
   __ push(a0);  // Preserve deoptimizer object across call.
   // a0: deoptimizer object; a1: scratch.
   __ PrepareCallCFunction(1, a1);
   // Call Deoptimizer::ComputeOutputFrames().
   {
     AllowExternalCallThatCantCauseGC scope(masm());
     __ CallCFunction(
         ExternalReference::compute_output_frames_function(isolate), 1);
   }
   __ pop(a0);  // Restore deoptimizer object (class Deoptimizer).
 
   // Replace the current (input) frame with the output frames.
-  Label outer_push_loop, inner_push_loop;
+  Label outer_push_loop, inner_push_loop,
+      outer_loop_header, inner_loop_header;
   // Outer loop state: a0 = current "FrameDescription** output_",
   // a1 = one past the last FrameDescription**.
   __ lw(a1, MemOperand(a0, Deoptimizer::output_count_offset()));
   __ lw(a0, MemOperand(a0, Deoptimizer::output_offset()));  // a0 is output_.
   __ sll(a1, a1, kPointerSizeLog2);  // Count to offset.
   __ addu(a1, a0, a1);  // a1 = one past the last FrameDescription**.
+  __ jmp(&outer_loop_header);
   __ bind(&outer_push_loop);
   // Inner loop state: a2 = current FrameDescription*, a3 = loop index.
   __ lw(a2, MemOperand(a0, 0));  // output_[ix]
   __ lw(a3, MemOperand(a2, FrameDescription::frame_size_offset()));
+  __ jmp(&inner_loop_header);
   __ bind(&inner_push_loop);
   __ Subu(a3, a3, Operand(sizeof(uint32_t)));
   __ Addu(t2, a2, Operand(a3));
   __ lw(t3, MemOperand(t2, FrameDescription::frame_content_offset()));
   __ push(t3);
+  __ bind(&inner_loop_header);
   __ Branch(&inner_push_loop, ne, a3, Operand(zero_reg));
 
   __ Addu(a0, a0, Operand(kPointerSize));
+  __ bind(&outer_loop_header);
   __ Branch(&outer_push_loop, lt, a0, Operand(a1));
 
 
   // Push state, pc, and continuation from the last output frame.
   if (type() != OSR) {
     __ lw(t2, MemOperand(a2, FrameDescription::state_offset()));
     __ push(t2);
   }
 
   __ lw(t2, MemOperand(a2, FrameDescription::pc_offset()));
@@ skipping 62 matching lines @@
   }
 
   ASSERT_EQ(masm()->SizeOfCodeGeneratedSince(&table_start),
       count() * table_entry_size_);
 }
 
 #undef __
 
 
 } }  // namespace v8::internal