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

src/code-stubs.cc

Index: src/code-stubs.cc
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index 0c802e1a3bd7a7b2834a6dfbb244cf0fd89ca811..e697b22f14bbbb2c268aca64f116ae58f049c392 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -1853,8 +1853,8 @@ void GenerateStringRelationalComparison(compiler::CodeStubAssembler* assembler,
           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);