x64: Implement context stores and loads, unknown osr value, and osr

src/x64/lithium-codegen-x64.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 1888 matching lines @@
   __ movq(temp, instr->hydrogen()->cell(), RelocInfo::GLOBAL_PROPERTY_CELL);
   if (check_hole) {
     __ CompareRoot(Operand(temp, 0), Heap::kTheHoleValueRootIndex);
     DeoptimizeIf(equal, instr->environment());
   }
   __ movq(Operand(temp, 0), value);
 }
 
 
 void LCodeGen::DoLoadContextSlot(LLoadContextSlot* instr) {
-  Abort("Unimplemented: %s", "DoLoadContextSlot");
+  Register context = ToRegister(instr->context());
+  Register result = ToRegister(instr->result());
+  __ movq(result, ContextOperand(context, instr->slot_index()));
 }
 
 
+void LCodeGen::DoStoreContextSlot(LStoreContextSlot* instr) {
+  Register context = ToRegister(instr->context());
+  Register value = ToRegister(instr->value());
+  __ movq(ContextOperand(context, instr->slot_index()), value);
+  if (instr->needs_write_barrier()) {
+    int offset = Context::SlotOffset(instr->slot_index());
+    __ RecordWrite(context, offset, value, kScratchRegister);
+  }
+}
+
+
 void LCodeGen::DoLoadNamedField(LLoadNamedField* instr) {
   Register object = ToRegister(instr->InputAt(0));
   Register result = ToRegister(instr->result());
   if (instr->hydrogen()->is_in_object()) {
     __ movq(result, FieldOperand(object, instr->hydrogen()->offset()));
   } else {
     __ movq(result, FieldOperand(object, JSObject::kPropertiesOffset));
     __ movq(result, FieldOperand(result, instr->hydrogen()->offset()));
   }
 }
@@ skipping 1429 matching lines @@
   RegisterEnvironmentForDeoptimization(environment);
   ASSERT(osr_pc_offset_ == -1);
   osr_pc_offset_ = masm()->pc_offset();
 }
 
 #undef __
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64