[turbofan] Add Symbol feedback to Equal/StrictEqual.

src/type-info.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/type-info.h"
 
 #include "src/assembler-inl.h"
 #include "src/ast/ast.h"
 #include "src/code-stubs.h"
 #include "src/ic/ic.h"
@@ skipping 173 matching lines @@
     case CompareOperationHint::kSignedSmall:
       return AstType::SignedSmall();
     case CompareOperationHint::kNumber:
       return AstType::Number();
     case CompareOperationHint::kNumberOrOddball:
       return AstType::NumberOrOddball();
     case CompareOperationHint::kInternalizedString:
       return AstType::InternalizedString();
     case CompareOperationHint::kString:
       return AstType::String();
+    case CompareOperationHint::kSymbol:
+      UNREACHABLE();
     case CompareOperationHint::kReceiver:
       return AstType::Receiver();
     case CompareOperationHint::kAny:
       return AstType::Any();
   }
   UNREACHABLE();
   return AstType::None();
 }
 
 AstType* BinaryOpFeedbackToType(int hint) {
@@ skipping 337 matching lines @@
   // Dictionary has been allocated with sufficient size for all elements.
   DisallowHeapAllocation no_need_to_resize_dictionary;
   HandleScope scope(isolate());
   USE(UnseededNumberDictionary::AtNumberPut(
       dictionary_, IdToKey(ast_id), handle(target, isolate())));
 }
 
 
 }  // namespace internal
 }  // namespace v8