Rollback trunk to 3.21.16.2

src/assembler.cc

 // Copyright (c) 1994-2006 Sun Microsystems Inc.
 // 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.
 //
@@ skipping 189 matching lines @@
 }
 
 
 CpuFeatureScope::~CpuFeatureScope() {
   assembler_->set_enabled_cpu_features(old_enabled_);
 }
 #endif
 
 
 // -----------------------------------------------------------------------------
-// Implementation of PlatformFeatureScope
-
-PlatformFeatureScope::PlatformFeatureScope(CpuFeature f)
-    : old_supported_(CpuFeatures::supported_),
-      old_found_by_runtime_probing_only_(
-          CpuFeatures::found_by_runtime_probing_only_) {
-  uint64_t mask = static_cast<uint64_t>(1) << f;
-  CpuFeatures::supported_ |= mask;
-  CpuFeatures::found_by_runtime_probing_only_ &= ~mask;
-}
-
-
-PlatformFeatureScope::~PlatformFeatureScope() {
-  CpuFeatures::supported_ = old_supported_;
-  CpuFeatures::found_by_runtime_probing_only_ =
-      old_found_by_runtime_probing_only_;
-}
-
-
-// -----------------------------------------------------------------------------
 // Implementation of Label
 
 int Label::pos() const {
   if (pos_ < 0) return -pos_ - 1;
   if (pos_ > 0) return  pos_ - 1;
   UNREACHABLE();
   return 0;
 }
 
 
@@ skipping 1456 matching lines @@
     assembler_->RecordRelocInfo(RelocInfo::POSITION, state_.current_position);
     state_.written_position = state_.current_position;
     written = true;
   }
 
   // Return whether something was written.
   return written;
 }
 
 } }  // namespace v8::internal