Allow HPushArgument to handle more than one argument.

src/x64/lithium-x64.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "v8.h"
 
 #if V8_TARGET_ARCH_X64
 
 #include "lithium-allocator-inl.h"
 #include "x64/lithium-x64.h"
@@ skipping 1005 matching lines @@
   LOperand* length = UseFixed(instr->length(), rbx);
   LOperand* elements = UseFixed(instr->elements(), rcx);
   LApplyArguments* result = new(zone()) LApplyArguments(function,
                                                 receiver,
                                                 length,
                                                 elements);
   return MarkAsCall(DefineFixed(result, rax), instr, CAN_DEOPTIMIZE_EAGERLY);
 }
 
 
-LInstruction* LChunkBuilder::DoPushArgument(HPushArgument* instr) {
-  LOperand* argument = UseOrConstant(instr->argument());
-  return new(zone()) LPushArgument(argument);
+LInstruction* LChunkBuilder::DoPushArguments(HPushArguments* instr) {
+  int argc = instr->OperandCount();
+  for (int i = 0; i < argc; ++i) {
+    LOperand* argument = UseOrConstant(instr->argument(i));
+    AddInstruction(new(zone()) LPushArgument(argument), instr);
+  }
+  return NULL;
 }
 
 
 LInstruction* LChunkBuilder::DoStoreCodeEntry(
     HStoreCodeEntry* store_code_entry) {
   LOperand* function = UseRegister(store_code_entry->function());
   LOperand* code_object = UseTempRegister(store_code_entry->code_object());
   return new(zone()) LStoreCodeEntry(function, code_object);
 }
 
@@ skipping 1561 matching lines @@
   LOperand* index = UseTempRegister(instr->index());
   LLoadFieldByIndex* load = new(zone()) LLoadFieldByIndex(object, index);
   LInstruction* result = DefineSameAsFirst(load);
   return AssignPointerMap(result);
 }
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_TARGET_ARCH_X64