[turbofan] Fix machine signature allocation bug.

src/compiler/linkage.cc

 // 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.
 
 #include "src/compiler/linkage.h"
 
 #include "src/ast/scopes.h"
 #include "src/code-stubs.h"
 #include "src/compilation-info.h"
 #include "src/compiler/common-operator.h"
@@ skipping 34 matching lines @@
 std::ostream& operator<<(std::ostream& os, const CallDescriptor& d) {
   // TODO(svenpanne) Output properties etc. and be less cryptic.
   return os << d.kind() << ":" << d.debug_name() << ":r" << d.ReturnCount()
             << "s" << d.StackParameterCount() << "i" << d.InputCount() << "f"
             << d.FrameStateCount() << "t" << d.SupportsTailCalls();
 }
 
 MachineSignature* CallDescriptor::GetMachineSignature(Zone* zone) const {
   size_t param_count = ParameterCount();
   size_t return_count = ReturnCount();
-  MachineType* types = reinterpret_cast<MachineType*>(
-      zone->New(sizeof(MachineType*) * (param_count + return_count)));
+  MachineType* types = zone->NewArray<MachineType>(param_count + return_count);
   int current = 0;
   for (size_t i = 0; i < return_count; ++i) {
     types[current++] = GetReturnType(i);
   }
   for (size_t i = 0; i < param_count; ++i) {
     types[current++] = GetParameterType(i);
   }
   return new (zone) MachineSignature(return_count, param_count, types);
 }
 
@@ skipping 438 matching lines @@
     DCHECK(loc == regloc(kContextRegister, MachineType::AnyTagged()));
     return LinkageLocation::ForCalleeFrameSlot(Frame::kContextSlot,
                                                MachineType::AnyTagged());
   }
 }
 
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8