[turbofan] Better and more sane support for tail calls

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/unicode.h"
@@ skipping 240 matching lines @@
   F(FunctionHidesSource, 1, 1)                \
   F(SetCode, 2, 1)                            \
   F(SetNativeFlag, 1, 1)                      \
   F(ThrowStrongModeTooFewArguments, 0, 1)     \
   F(IsConstructor, 1, 1)                      \
   F(SetForceInlineFlag, 1, 1)                 \
   F(FunctionBindArguments, 4, 1)              \
   F(BoundFunctionGetBindings, 1, 1)           \
   F(NewObjectFromBound, 1, 1)                 \
   F(Call, -1 /* >= 2 */, 1)                   \
+  F(TailCall, -1 /* >= 2 */, 1)               \
   F(Apply, 5, 1)                              \
   F(GetNewTarget, 0, 1)                       \
   F(ConvertReceiver, 1, 1)                    \
   F(IsConstructCall, 0, 1)                    \
   F(IsFunction, 1, 1)
 
 
 #define FOR_EACH_INTRINSIC_GENERATOR(F) \
   F(CreateJSGeneratorObject, 0, 1)      \
   F(SuspendJSGeneratorObject, -1, 1)    \
@@ skipping 987 matching lines @@
 
 class DeclareGlobalsEvalFlag : public BitField<bool, 0, 1> {};
 class DeclareGlobalsNativeFlag : public BitField<bool, 1, 1> {};
 STATIC_ASSERT(LANGUAGE_END == 3);
 class DeclareGlobalsLanguageMode : public BitField<LanguageMode, 2, 2> {};
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_RUNTIME_RUNTIME_H_