[turbofan] Add binary operation hints for javascript operators.

src/compiler/js-typed-lowering.cc

 // Copyright 2014 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-factory.h"
 #include "src/compilation-dependencies.h"
 #include "src/compiler/access-builder.h"
 #include "src/compiler/js-graph.h"
 #include "src/compiler/js-typed-lowering.h"
 #include "src/compiler/linkage.h"
@@ skipping 200 matching lines @@
       value->ReplaceInput(0, node_);
       return lowering_->Replace(value);
     }
     return lowering_->Changed(node_);
   }
 
   Reduction ChangeToPureOperator(const Operator* op, Type* type) {
     return ChangeToPureOperator(op, false, type);
   }
 
-  bool IsStrong() { return is_strong(OpParameter<LanguageMode>(node_)); }
+  // TODO(turbofan): Strong mode should be killed soonish!

[Jarin, 2015/12/01 07:31:00]

???

+  bool IsStrong() const {
+    if (node_->opcode() == IrOpcode::kJSLessThan ||
+        node_->opcode() == IrOpcode::kJSLessThanOrEqual ||
+        node_->opcode() == IrOpcode::kJSGreaterThan ||
+        node_->opcode() == IrOpcode::kJSGreaterThanOrEqual) {
+      return is_strong(OpParameter<LanguageMode>(node_));
+    }
+    return is_strong(BinaryOperationParametersOf(node_->op()).language_mode());
+  }
 
   bool LeftInputIs(Type* t) { return left_type()->Is(t); }
 
   bool RightInputIs(Type* t) { return right_type()->Is(t); }
 
   bool OneInputIs(Type* t) { return LeftInputIs(t) || RightInputIs(t); }
 
   bool BothInputsAre(Type* t) { return LeftInputIs(t) && RightInputIs(t); }
 
   bool OneInputCannotBe(Type* t) {
@@ skipping 2357 matching lines @@
 }
 
 
 CompilationDependencies* JSTypedLowering::dependencies() const {
   return dependencies_;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8