Cleanup of ARM exception handlers. Remove the unused code and...

src/x64/codegen-x64.cc

 // Copyright 2009 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
@@ skipping 263 matching lines @@
   // Caught exception: Store result (exception) in the pending
   // exception field in the JSEnv and return a failure sentinel.
   ExternalReference pending_exception(Top::k_pending_exception_address);
   __ store_rax(pending_exception);
   __ movq(rax, Failure::Exception(), RelocInfo::NONE);
   __ jmp(&exit);
 
   // Invoke: Link this frame into the handler chain.
   __ bind(&invoke);
   __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER);
-  __ push(rax);  // flush TOS
 
   // Clear any pending exceptions.
   __ load_rax(ExternalReference::the_hole_value_location());
   __ store_rax(pending_exception);
 
   // Fake a receiver (NULL).
   __ push(Immediate(0));  // receiver
 
   // Invoke the function by calling through JS entry trampoline
   // builtin and pop the faked function when we return. We load the address
@@ skipping 32 matching lines @@
 
   // Restore frame pointer and return.
   __ pop(rbp);
   __ ret(0);
 }
 
 
 #undef __
 
 } }  // namespace v8::internal