[debug] use catch prediction flag for promise rejections.

src/compiler/common-operator.h

 // 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.
 
 #ifndef V8_COMPILER_COMMON_OPERATOR_H_
 #define V8_COMPILER_COMMON_OPERATOR_H_
 
 #include "src/assembler.h"
 #include "src/compiler/frame-states.h"
 #include "src/deoptimize-reason.h"
@@ skipping 59 matching lines @@
 bool operator==(DeoptimizeParameters, DeoptimizeParameters);
 bool operator!=(DeoptimizeParameters, DeoptimizeParameters);
 
 size_t hast_value(DeoptimizeParameters p);
 
 std::ostream& operator<<(std::ostream&, DeoptimizeParameters p);
 
 DeoptimizeParameters const& DeoptimizeParametersOf(Operator const* const);
 
 // Prediction whether throw-site is surrounded by any local catch-scope.
-enum class IfExceptionHint { kLocallyUncaught, kLocallyCaught };
+enum class IfExceptionHint {
+  kLocallyUncaught,
+  kLocallyCaught,
+  kLocallyCaughtForPromiseReject
+};
+
+IfExceptionHint ExceptionHintFromCatchPrediction(
+    HandlerTable::CatchPrediction prediction);
 
 size_t hash_value(IfExceptionHint hint);
 
 std::ostream& operator<<(std::ostream&, IfExceptionHint);
 
 
 class SelectParameters final {
  public:
   explicit SelectParameters(MachineRepresentation representation,
                             BranchHint hint = BranchHint::kNone)
@@ skipping 166 matching lines @@
   Zone* const zone_;
 
   DISALLOW_COPY_AND_ASSIGN(CommonOperatorBuilder);
 };
 
 }  // namespace compiler
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_COMPILER_COMMON_OPERATOR_H_