Implement IsConstructor() abstract operation

src/runtime/runtime.h

 // 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.
 
 #ifndef V8_RUNTIME_RUNTIME_H_
 #define V8_RUNTIME_RUNTIME_H_
 
 #include "src/allocation.h"
 #include "src/objects.h"
 #include "src/zone.h"
@@ skipping 55 matching lines @@
   F(RunningInSimulator, 0, 1)                              \
   F(IsConcurrentRecompilationSupported, 0, 1)              \
   F(OptimizeFunctionOnNextCall, -1, 1)                     \
   F(NeverOptimizeFunction, 1, 1)                           \
   F(GetOptimizationStatus, -1, 1)                          \
   F(GetOptimizationCount, 1, 1)                            \
   F(UnblockConcurrentRecompilation, 0, 1)                  \
   F(CompileForOnStackReplacement, 1, 1)                    \
   F(SetAllocationTimeout, -1 /* 2 || 3 */, 1)              \
   F(SetNativeFlag, 1, 1)                                   \
+  F(IsConstructor, 1, 1)                                   \
   F(SetInlineBuiltinFlag, 1, 1)                            \
   F(StoreArrayLiteralElement, 5, 1)                        \
   F(DebugPrepareStepInIfStepping, 1, 1)                    \
   F(DebugPushPromise, 1, 1)                                \
   F(DebugPopPromise, 0, 1)                                 \
   F(DebugPromiseEvent, 1, 1)                               \
   F(DebugAsyncTaskEvent, 1, 1)                             \
   F(PromiseRejectEvent, 3, 1)                              \
   F(PromiseRevokeReject, 1, 1)                             \
   F(PromiseHasHandlerSymbol, 0, 1)                         \
@@ skipping 803 matching lines @@
 class AllocateTargetSpace : public BitField<AllocationSpace, 1, 3> {};
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 class DeclareGlobalsStrictMode : public BitField<StrictMode, 2, 1> {};
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_