A64: Implement LOsrEntry and LUnknownOSRValue

src/a64/lithium-a64.cc

 // Copyright 2013 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 1864 matching lines @@
   }
 }
 
 
 LInstruction* LChunkBuilder::DoNumericConstraint(HNumericConstraint* instr) {
   return NULL;
 }
 
 
 LInstruction* LChunkBuilder::DoOsrEntry(HOsrEntry* instr) {
-  UNIMPLEMENTED_INSTRUCTION();
+  ASSERT(argument_count_ == 0);
+  allocator_->MarkAsOsrEntry();
+  current_block_->last_environment()->set_ast_id(instr->ast_id());
+  return AssignEnvironment(new(zone()) LOsrEntry);
 }
 
 
 LInstruction* LChunkBuilder::DoOuterContext(HOuterContext* instr) {
   LOperand* context = UseRegisterAtStart(instr->value());
   return DefineAsRegister(new(zone()) LOuterContext(context));
 }
 
 
 LInstruction* LChunkBuilder::DoParameter(HParameter* instr) {
@@ skipping 558 matching lines @@
       return MarkAsCall(DefineFixedDouble(result, d0), instr);
     }
     default:
       UNREACHABLE();
       return NULL;
   }
 }
 
 
 LInstruction* LChunkBuilder::DoUnknownOSRValue(HUnknownOSRValue* instr) {
-  UNIMPLEMENTED_INSTRUCTION();
+  int spill_index = chunk_->GetNextSpillIndex();
+  if (spill_index > LUnallocated::kMaxFixedSlotIndex) {
+    Abort("Too many spill slots needed for OSR");
+    spill_index = 0;
+  }
+  return DefineAsSpilled(new(zone()) LUnknownOSRValue, spill_index);
 }
 
 
 LInstruction* LChunkBuilder::DoUseConst(HUseConst* instr) {
   return NULL;
 }
 
 
 LInstruction* LChunkBuilder::DoValueOf(HValueOf* instr) {
   LOperand* object = UseRegister(instr->value());
@@ skipping 35 matching lines @@
 LInstruction* LChunkBuilder::DoWrapReceiver(HWrapReceiver* instr) {
   LOperand* receiver = UseRegister(instr->receiver());
   LOperand* function = UseRegisterAtStart(instr->function());
   LOperand* temp = TempRegister();
   LWrapReceiver* result = new(zone()) LWrapReceiver(receiver, function, temp);
   return AssignEnvironment(DefineAsRegister(result));
 }
 
 
 } }  // namespace v8::internal