79   StringRef Comment(CommentText);  in HandleComment()  local
80   if (Comment.empty())  in HandleComment()
84   unsigned Position = Comment.find_first_not_of(" \t");  in HandleComment()
85   if (Position >= Comment.size())  in HandleComment()
89   Comment = Comment.drop_front(Position);  in HandleComment()
90   if (Comment.consume_front("LLVM-MCA-END")) {  in HandleComment()
92     Position = Comment.find_first_not_of(" \t");  in HandleComment()
93     if (Position < Comment.size())  in HandleComment()
94       Comment = Comment.drop_front(Position);  in HandleComment()
95     Regions.endRegion(Comment, Loc);  in HandleComment()
100   if (!Comment.consume_front("LLVM-MCA-BEGIN"))  in HandleComment()
104   Position = Comment.find_first_not_of(" \t");  in HandleComment()
105   if (Position < Comment.size())  in HandleComment()
106     Comment = Comment.drop_front(Position);  in HandleComment()
108   Regions.beginRegion(Comment, Loc);  in HandleComment()
114   StringRef Comment(CommentText);  in HandleComment()  local
115   if (Comment.empty())  in HandleComment()
119   unsigned Position = Comment.find_first_not_of(" \t");  in HandleComment()
120   if (Position >= Comment.size())  in HandleComment()
123   Comment = Comment.drop_front(Position);  in HandleComment()
126   if (!Comment.consume_front("LLVM-MCA-"))  in HandleComment()
130   if (Comment.consume_front("BEGIN") || Comment.consume_front("END"))  in HandleComment()
136   auto [InstrumentKind, Data] = Comment.split(" ");  in HandleComment()