Add dynamic stack frame alignment to optimized functions with untagged doubles on the stack.

src/assembler.cc

 // Copyright (c) 2011 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 827 matching lines @@
   return ExternalReference(isolate->factory()->the_hole_value().location());
 }
 
 
 ExternalReference ExternalReference::arguments_marker_location(
     Isolate* isolate) {
   return ExternalReference(isolate->factory()->arguments_marker().location());
 }
 
 
+ExternalReference ExternalReference::frame_alignment_marker_location(
+    Isolate* isolate) {
+  return ExternalReference(
+      isolate->factory()->frame_alignment_marker().location());
+}
+
+
 ExternalReference ExternalReference::roots_address(Isolate* isolate) {
   return ExternalReference(isolate->heap()->roots_address());
 }
 
 
 ExternalReference ExternalReference::address_of_stack_limit(Isolate* isolate) {
   return ExternalReference(isolate->stack_guard()->address_of_jslimit());
 }
 
 
@@ skipping 384 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