A64: Synchronize with r17635.

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 673 matching lines @@
 }
 
 
 void LChunkBuilder::VisitInstruction(HInstruction* current) {
   HInstruction* old_current = current_instruction_;
   current_instruction_ = current;
   if (current->has_position()) position_ = current->position();
 
   LInstruction* instr = NULL;
   if (current->CanReplaceWithDummyUses()) {
-    HValue* first_operand = current->OperandCount() == 0
-        ? graph()->GetConstant1()
-        : current->OperandAt(0);
-    instr = DefineAsRegister(new(zone()) LDummyUse(UseAny(first_operand)));
+    if (current->OperandCount() == 0) {
+      instr = DefineAsRegister(new(zone()) LDummy());
+    } else {
+      instr = DefineAsRegister(new(zone())
+          LDummyUse(UseAny(current->OperandAt(0))));
+    }
     for (int i = 1; i < current->OperandCount(); ++i) {
       LInstruction* dummy =
           new(zone()) LDummyUse(UseAny(current->OperandAt(i)));
       dummy->set_hydrogen_value(current);
       chunk_->AddInstruction(dummy, current_block_);
     }
   } else {
     instr = current->CompileToLithium(this);
   }
 
@@ skipping 1281 matching lines @@
   return MarkAsCall(DefineFixed(new(zone()) LRegExpLiteral, x0), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoReturn(HReturn* instr) {
   LOperand* parameter_count = UseRegisterOrConstant(instr->parameter_count());
   return new(zone()) LReturn(UseFixed(instr->value(), x0), parameter_count);
 }
 
 
+LInstruction* LChunkBuilder::DoSeqStringGetChar(HSeqStringGetChar* instr) {
+  Abort(kUnimplemented);
+  return NULL;
+}
+
+
 LInstruction* LChunkBuilder::DoSeqStringSetChar(HSeqStringSetChar* instr) {
   LOperand* string = UseRegister(instr->string());
   LOperand* index = UseRegister(instr->index());
   LOperand* value = UseRegister(instr->value());
   LOperand* temp = TempRegister();
   LSeqStringSetChar* result =
       new(zone()) LSeqStringSetChar(instr->encoding(),
                                     string, index, value, temp);
   return DefineAsRegister(result);
 }
@@ skipping 221 matching lines @@
 
 LInstruction* LChunkBuilder::DoStoreNamedGeneric(HStoreNamedGeneric* instr) {
   LOperand* object = UseFixed(instr->object(), x1);
   LOperand* value = UseFixed(instr->value(), x0);
   LInstruction* result = new(zone()) LStoreNamedGeneric(object, value);
   return MarkAsCall(result, instr);
 }
 
 
 LInstruction* LChunkBuilder::DoStringAdd(HStringAdd* instr) {
-  LOperand* left = UseRegisterAtStart(instr->left());
-  LOperand* right = UseRegisterAtStart(instr->right());
+  LOperand* left = FLAG_new_string_add ? UseFixed(instr->left(), x1)
+                                       : UseRegisterAtStart(instr->left());
+  LOperand* right = FLAG_new_string_add ? UseFixed(instr->right(), x0)
+                                        : UseRegisterAtStart(instr->right());
 
   LStringAdd* result = new(zone()) LStringAdd(left, right);
   return MarkAsCall(DefineFixed(result, x0), instr);
 }
 
 
 LInstruction* LChunkBuilder::DoStringCharCodeAt(HStringCharCodeAt* instr) {
   LOperand* string = UseRegisterAndClobber(instr->string());
   LOperand* index = UseRegisterAndClobber(instr->index());
   LStringCharCodeAt* result = new(zone()) LStringCharCodeAt(string, index);
@@ skipping 292 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