[turbofan] Byte and word memory operands in x64 cmp/test. Fixes arithmetic_op_8 in assembler-x64.cc

src/code-stubs.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "src/code-stubs.h"
 
 #include <sstream>
 
 #include "src/bootstrapper.h"
 #include "src/code-factory.h"
@@ skipping 1835 matching lines @@
 
           assembler->Bind(&if_valueissame);
           {
             // Advance to next character.
             var_offset.Bind(
                 assembler->IntPtrAdd(offset, assembler->IntPtrConstant(1)));
           }
           assembler->Goto(&loop);
 
           assembler->Bind(&if_valueisnotsame);
-          assembler->BranchIfInt32LessThan(lhs_value, rhs_value, &if_less,
-                                           &if_greater);
+          assembler->BranchIf(assembler->Uint32LessThan(lhs_value, rhs_value),
+                              &if_less, &if_greater);
         }
 
         assembler->Bind(&if_done);
         {
           // All characters up to the min length are equal, decide based on
           // string length.
           Label if_lengthisequal(assembler), if_lengthisnotequal(assembler);
           assembler->Branch(assembler->SmiEqual(lhs_length, rhs_length),
                             &if_lengthisequal, &if_lengthisnotequal);
 
@@ skipping 888 matching lines @@
   if (type->Is(Type::UntaggedPointer())) {
     return Representation::External();
   }
 
   DCHECK(!type->Is(Type::Untagged()));
   return Representation::Tagged();
 }
 
 }  // namespace internal
 }  // namespace v8