Re-land Crankshaft-generated KeyedLoad stubs.

src/frames.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 599 matching lines @@
 
 bool StandardFrame::IsExpressionInsideHandler(int n) const {
   Address address = GetExpressionAddress(n);
   for (StackHandlerIterator it(this, top_handler()); !it.done(); it.Advance()) {
     if (it.handler()->includes(address)) return true;
   }
   return false;
 }
 
 
-void CompiledFrame::Iterate(ObjectVisitor* v) const {
-#ifdef DEBUG
-  // Make sure that optimized frames do not contain any stack handlers.
-  StackHandlerIterator it(this, top_handler());
-  ASSERT(it.done());
-#endif
-
+void IterateCompiledFrame(const StandardFrame* frame, ObjectVisitor* v) {
   // Make sure that we're not doing "safe" stack frame iteration. We cannot
   // possibly find pointers in optimized frames in that state.
-  ASSERT(!SafeStackFrameIterator::is_active(isolate()));
+  ASSERT(!SafeStackFrameIterator::is_active(frame->isolate()));
 
   // Compute the safepoint information.
   unsigned stack_slots = 0;
   SafepointEntry safepoint_entry;
   Code* code = StackFrame::GetSafepointData(
-      isolate(), pc(), &safepoint_entry, &stack_slots);
+      frame->isolate(), frame->pc(), &safepoint_entry, &stack_slots);
   unsigned slot_space = stack_slots * kPointerSize;
 
   // Visit the outgoing parameters.
-  Object** parameters_base = &Memory::Object_at(sp());
+  Object** parameters_base = &Memory::Object_at(frame->sp());
   Object** parameters_limit = &Memory::Object_at(
-      fp() + JavaScriptFrameConstants::kFunctionOffset - slot_space);
+      frame->fp() + JavaScriptFrameConstants::kFunctionOffset - slot_space);
 
   // Visit the parameters that may be on top of the saved registers.
   if (safepoint_entry.argument_count() > 0) {
     v->VisitPointers(parameters_base,
                      parameters_base + safepoint_entry.argument_count());
     parameters_base += safepoint_entry.argument_count();
   }
 
   // Skip saved double registers.
   if (safepoint_entry.has_doubles()) {
@@ skipping 23 matching lines @@
   // Visit pointer spill slots and locals.
   for (unsigned index = 0; index < stack_slots; index++) {
     int byte_index = index >> kBitsPerByteLog2;
     int bit_index = index & (kBitsPerByte - 1);
     if ((safepoint_bits[byte_index] & (1U << bit_index)) != 0) {
       v->VisitPointer(parameters_limit + index);
     }
   }
 
   // Visit the return address in the callee and incoming arguments.
-  IteratePc(v, pc_address(), code);
+  frame->IteratePc(v, frame->pc_address(), code);
 }
 
 
 void StubFrame::Iterate(ObjectVisitor* v) const {
-  CompiledFrame::Iterate(v);
+  IterateCompiledFrame(this, v);
+}
+
+
+Code* StubFrame::unchecked_code() const {
+  return static_cast<Code*>(isolate()->heap()->FindCodeObject(pc()));
+}
+
+
+Address StubFrame::GetCallerStackPointer() const {
+  return fp() + ExitFrameConstants::kCallerSPDisplacement;
+}
+
+
+int StubFrame::GetNumberOfIncomingArguments() const {
+  return 0;
 }
 
 
 void OptimizedFrame::Iterate(ObjectVisitor* v) const {
-  CompiledFrame::Iterate(v);
+#ifdef DEBUG
+  // Make sure that optimized frames do not contain any stack handlers.
+  StackHandlerIterator it(this, top_handler());
+  ASSERT(it.done());
+#endif
+
+  IterateCompiledFrame(this, v);
 
   // Visit the context and the function.
   Object** fixed_base = &Memory::Object_at(
       fp() + JavaScriptFrameConstants::kFunctionOffset);
   Object** fixed_limit = &Memory::Object_at(fp());
   v->VisitPointers(fixed_base, fixed_limit);
 }
 
 
 bool JavaScriptFrame::IsConstructor() const {
@@ skipping 740 matching lines @@
   ZoneList<StackFrame*> list(10, zone);
   for (StackFrameIterator it; !it.done(); it.Advance()) {
     StackFrame* frame = AllocateFrameCopy(it.frame(), zone);
     list.Add(frame, zone);
   }
   return list.ToVector();
 }
 
 
 } }  // namespace v8::internal