14   else_environment_ = environment()->CopyForConditional();  in If()
23   then_environment_ = environment();  in Else()
30   then_environment_->Merge(environment());  in End()
36   loop_environment_ = environment()->CopyForLoop(assigned, is_osr);  in BeginLoop()
37   continue_environment_ = environment()->CopyAsUnreachable();  in BeginLoop()
38   break_environment_ = environment()->CopyAsUnreachable();  in BeginLoop()
43   continue_environment_->Merge(environment());  in Continue()
44   environment()->MarkAsUnreachable();  in Continue()
49   break_environment_->Merge(environment());  in Break()
50   environment()->MarkAsUnreachable();  in Break()
55   continue_environment_->Merge(environment());  in EndBody()
61   loop_environment_->Merge(environment());  in EndLoop()
87   body_environment_ = environment()->CopyAsUnreachable();  in BeginSwitch()
88   label_environment_ = environment()->CopyAsUnreachable();  in BeginSwitch()
89   break_environment_ = environment()->CopyAsUnreachable();  in BeginSwitch()
95   label_environment_ = environment()->CopyForConditional();  in BeginLabel()
97   body_environments_[index] = environment();  in BeginLabel()
108   label_environment_ = environment()->CopyAsUnreachable();  in DefaultAt()
109   body_environments_[index] = environment();  in DefaultAt()
115   environment()->Merge(body_environment_);  in BeginCase()
120   break_environment_->Merge(environment());  in Break()
121   environment()->MarkAsUnreachable();  in Break()
125 void SwitchBuilder::EndCase() { body_environment_ = environment(); }  in EndCase()
130   break_environment_->Merge(environment());  in EndSwitch()
136   break_environment_ = environment()->CopyAsUnreachable();  in BeginBlock()
141   break_environment_->Merge(environment());  in Break()
142   environment()->MarkAsUnreachable();  in Break()
167   break_environment_->Merge(environment());  in EndBlock()
173   exit_environment_ = environment()->CopyAsUnreachable();  in BeginTry()
174   catch_environment_ = environment()->CopyAsUnreachable();  in BeginTry()
180   environment()->Push(exception);  in Throw()
181   catch_environment_->Merge(environment());  in Throw()
182   environment()->Pop();  in Throw()
183   environment()->MarkAsUnreachable();  in Throw()
188   exit_environment_->Merge(environment());  in EndTry()
195   exit_environment_->Merge(environment());  in EndCatch()
201   finally_environment_ = environment()->CopyAsUnreachable();  in BeginTry()
208   environment()->Push(value);  in LeaveTry()
209   environment()->Push(token);  in LeaveTry()
210   finally_environment_->Merge(environment());  in LeaveTry()
211   environment()->Drop(2);  in LeaveTry()
216   environment()->Push(value);  in EndTry()
217   environment()->Push(fallthrough_token);  in EndTry()
218   finally_environment_->Merge(environment());  in EndTry()
219   environment()->Drop(2);  in EndTry()