Ensure 16-byte stack alignment on Solaris.

src/platform-solaris.cc

-// Copyright 2006-2009 the V8 project authors. All rights reserved.
+// Copyright 2011 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
 //       with the distribution.
@@ skipping 86 matching lines @@
   srandom(static_cast<unsigned int>(seed));
 }
 
 
 uint64_t OS::CpuFeaturesImpliedByPlatform() {
   return 0;  // Solaris runs on a lot of things.
 }
 
 
 int OS::ActivationFrameAlignment() {
-  return STACK_ALIGN;
+  // GCC generates code that requires 16 byte alignment such as movdqa.
+  return Max(STACK_ALIGN, 16);
 }
 
 
 void OS::ReleaseStore(volatile AtomicWord* ptr, AtomicWord value) {
   __asm__ __volatile__("" : : : "memory");
   *ptr = value;
 }
 
 
 const char* OS::LocalTimezone(double time) {
@@ skipping 632 matching lines @@
     data_->signal_handler_installed_ = false;
   }
 
   // This sampler is no longer the active sampler.
   active_sampler_ = NULL;
 }
 
 #endif  // ENABLE_LOGGING_AND_PROFILING
 
 } }  // namespace v8::internal