Align code by 32 bytes to reduce benchmark flakiness on Intel CPUs.

runtime/vm/os_win.cc

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #include "vm/globals.h"
 #if defined(TARGET_OS_WINDOWS)
 
 #include "vm/os.h"
 #include "vm/vtune.h"
 
@@ skipping 119 matching lines @@
   // Windows 64-bit ABI requires the stack to be 16-byte aligned.
   return 16;
 #else
   // No requirements on Win32.
   return 0;
 #endif
 }
 
 
 word OS::PreferredCodeAlignment() {
-  ASSERT(16 <= OS::kMaxPreferredCodeAlignment);
-  return 16;
+  ASSERT(32 <= OS::kMaxPreferredCodeAlignment);
+  return 32;
 }
 
 
 uword OS::GetStackSizeLimit() {
   // TODO(ager): Can you programatically determine the actual stack
   // size limit on Windows? The 2MB limit is set at link time. Maybe
   // that value should be propagated here?
   return 2 * MB;
 }
 
@@ skipping 154 matching lines @@
 }
 
 
 void OS::Exit(int code) {
   exit(code);
 }
 
 }  // namespace dart
 
 #endif  // defined(TARGET_OS_WINDOWS)