[turbofan] Properly support Number feedback for binary operators.

src/compiler/js-type-hint-lowering.cc

 // Copyright 2017 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/compiler/js-type-hint-lowering.h"
 
 #include "src/compiler/js-graph.h"
 #include "src/compiler/operator-properties.h"
 #include "src/compiler/simplified-operator.h"
 #include "src/feedback-vector.h"
 #include "src/type-hints.h"
 
 namespace v8 {
 namespace internal {
 namespace compiler {
 
 namespace {
 
 bool BinaryOperationHintToNumberOperationHint(
     BinaryOperationHint binop_hint, NumberOperationHint* number_hint) {
   switch (binop_hint) {
     case BinaryOperationHint::kSignedSmall:
       *number_hint = NumberOperationHint::kSignedSmall;
       return true;
     case BinaryOperationHint::kSigned32:
       *number_hint = NumberOperationHint::kSigned32;
       return true;
+    case BinaryOperationHint::kNumber:
+      *number_hint = NumberOperationHint::kNumber;
+      return true;
     case BinaryOperationHint::kNumberOrOddball:
       *number_hint = NumberOperationHint::kNumberOrOddball;
       return true;
     case BinaryOperationHint::kAny:
     case BinaryOperationHint::kNone:
     case BinaryOperationHint::kString:
       break;
   }
   return false;
 }
@@ skipping 282 matching lines @@
     Node* frame_state = NodeProperties::FindFrameStateBefore(deoptimize);
     deoptimize->ReplaceInput(0, frame_state);
     return deoptimize;
   }
   return nullptr;
 }
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8