Remove usages of alloca() according to style guide.

src/compiler/machine-node-factory.h

 // Copyright 2014 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.
 
 #ifndef V8_COMPILER_MACHINE_NODE_FACTORY_H_
 #define V8_COMPILER_MACHINE_NODE_FACTORY_H_
 
 #ifdef USE_SIMULATOR
 #define MACHINE_ASSEMBLER_SUPPORTS_CALL_C 0
 #else
@@ skipping 331 matching lines @@
   Node* TruncateInt64ToInt32(Node* a) {
     return NEW_NODE_1(MACHINE()->TruncateInt64ToInt32(), a);
   }
 
 #ifdef MACHINE_ASSEMBLER_SUPPORTS_CALL_C
   // Call to C.
   Node* CallC(Node* function_address, MachineType return_type,
               MachineType* arg_types, Node** args, int n_args) {
     CallDescriptor* descriptor =
         Linkage::GetSimplifiedCDescriptor(ZONE(), MACHINE_SIG());
-    Node** passed_args =
-        static_cast<Node**>(alloca((n_args + 1) * sizeof(args[0])));
+    Node** passed_args = ZONE()->NewArray<Node*>(n_args + 1);
     passed_args[0] = function_address;
     for (int i = 0; i < n_args; ++i) {
       passed_args[i + 1] = args[i];
     }
     return NEW_NODE_2(COMMON()->Call(descriptor), n_args + 1, passed_args);
   }
 #endif
 };
 
 #undef NEW_NODE_0
 #undef NEW_NODE_1
 #undef NEW_NODE_2
 #undef NEW_NODE_3
 #undef MACHINE
 #undef COMMON
 #undef ZONE
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_MACHINE_NODE_FACTORY_H_