Fix bug in propagation of type information into registers....

src/x64/register-allocator-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 26 matching lines @@
 // -------------------------------------------------------------------------
 // Result implementation.
 
 void Result::ToRegister() {
   ASSERT(is_valid());
   if (is_constant()) {
     Result fresh = CodeGeneratorScope::Current()->allocator()->Allocate();
     ASSERT(fresh.is_valid());
     CodeGeneratorScope::Current()->masm()->Move(fresh.reg(), handle());
     // This result becomes a copy of the fresh one.
+    fresh.set_number_info(number_info());
     *this = fresh;
   }
   ASSERT(is_register());
 }
 
 
 void Result::ToRegister(Register target) {
   ASSERT(is_valid());
   if (!is_register() || !reg().is(target)) {
     Result fresh = CodeGeneratorScope::Current()->allocator()->Allocate(target);
     ASSERT(fresh.is_valid());
     if (is_register()) {
       CodeGeneratorScope::Current()->masm()->movq(fresh.reg(), reg());
     } else {
       ASSERT(is_constant());
       CodeGeneratorScope::Current()->masm()->Move(fresh.reg(), handle());
     }
+    fresh.set_number_info(number_info());
     *this = fresh;
   } else if (is_register() && reg().is(target)) {
     ASSERT(CodeGeneratorScope::Current()->has_valid_frame());
     CodeGeneratorScope::Current()->frame()->Spill(target);
     ASSERT(CodeGeneratorScope::Current()->allocator()->count(target) == 1);
   }
   ASSERT(is_register());
   ASSERT(reg().is(target));
 }
 
 
 // -------------------------------------------------------------------------
 // RegisterAllocator implementation.
 
 Result RegisterAllocator::AllocateByteRegisterWithoutSpilling() {
   // This function is not used in 64-bit code.
   UNREACHABLE();
   return Result();
 }
 
 
 } }  // namespace v8::internal