[turbofan] JSGenericLowering mostly uses builtins instead of code stubs now

src/builtins/builtins-string.cc

 // Copyright 2016 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/builtins/builtins.h"
 #include "src/builtins/builtins-utils.h"
 
 #include "src/code-factory.h"
 
 namespace v8 {
@@ skipping 376 matching lines @@
   GenerateStringEqual(assembler, kDontNegateResult);
 }
 
 // static
 void Builtins::Generate_StringNotEqual(CodeStubAssembler* assembler) {
   GenerateStringEqual(assembler, kNegateResult);
 }
 
 // static
 void Builtins::Generate_StringLessThan(CodeStubAssembler* assembler) {
-  GenerateStringRelationalComparison(assembler, kLessThan);
+  GenerateStringRelationalComparison(assembler,
+                                     RelationalComparisonMode::kLessThan);
 }
 
 // static
 void Builtins::Generate_StringLessThanOrEqual(CodeStubAssembler* assembler) {
-  GenerateStringRelationalComparison(assembler, kLessThanOrEqual);
+  GenerateStringRelationalComparison(
+      assembler, RelationalComparisonMode::kLessThanOrEqual);
 }
 
 // static
 void Builtins::Generate_StringGreaterThan(CodeStubAssembler* assembler) {
-  GenerateStringRelationalComparison(assembler, kGreaterThan);
+  GenerateStringRelationalComparison(assembler,
+                                     RelationalComparisonMode::kGreaterThan);
 }
 
 // static
 void Builtins::Generate_StringGreaterThanOrEqual(CodeStubAssembler* assembler) {
-  GenerateStringRelationalComparison(assembler, kGreaterThanOrEqual);
+  GenerateStringRelationalComparison(
+      assembler, RelationalComparisonMode::kGreaterThanOrEqual);
 }
 
 // -----------------------------------------------------------------------------
 // ES6 section 21.1 String Objects
 
 // ES6 section 21.1.2.1 String.fromCharCode ( ...codeUnits )
 void Builtins::Generate_StringFromCharCode(CodeStubAssembler* assembler) {
   typedef CodeStubAssembler::Label Label;
   typedef compiler::Node Node;
   typedef CodeStubAssembler::Variable Variable;
@@ skipping 654 matching lines @@
   }
 
   iterator->set_string(isolate->heap()->empty_string());
 
   return *isolate->factory()->NewJSIteratorResult(
       isolate->factory()->undefined_value(), true);
 }
 
 }  // namespace internal
 }  // namespace v8