[stubs] Improve code generation for ToBoolean.

src/builtins/builtins.h

 // Copyright 2011 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_BUILTINS_BUILTINS_H_
 #define V8_BUILTINS_BUILTINS_H_
 
 #include "src/base/flags.h"
 #include "src/handles.h"
 
@@ skipping 145 matching lines @@
   /* Adapters for Turbofan into runtime */                                   \
   ASM(AllocateInNewSpace)                                                    \
   ASM(AllocateInOldSpace)                                                    \
                                                                              \
   /* Debugger */                                                             \
   DBG(Return_DebugBreak)                                                     \
   DBG(Slot_DebugBreak)                                                       \
   DBG(FrameDropper_LiveEdit)                                                 \
                                                                              \
   /* Type conversions */                                                     \
+  TFS(ToBoolean, BUILTIN, kNoExtraICState, TypeConversion)                   \
   TFS(OrdinaryToPrimitive_Number, BUILTIN, kNoExtraICState, TypeConversion)  \
   TFS(OrdinaryToPrimitive_String, BUILTIN, kNoExtraICState, TypeConversion)  \
   TFS(NonPrimitiveToPrimitive_Default, BUILTIN, kNoExtraICState,             \
       TypeConversion)                                                        \
   TFS(NonPrimitiveToPrimitive_Number, BUILTIN, kNoExtraICState,              \
       TypeConversion)                                                        \
   TFS(NonPrimitiveToPrimitive_String, BUILTIN, kNoExtraICState,              \
       TypeConversion)                                                        \
   ASM(StringToNumber)                                                        \
   TFS(NonNumberToNumber, BUILTIN, kNoExtraICState, TypeConversion)           \
@@ skipping 440 matching lines @@
 
   friend class Isolate;
 
   DISALLOW_COPY_AND_ASSIGN(Builtins);
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_BUILTINS_BUILTINS_H_