87   StringRef Comment(CommentText);  in HandleComment()  local
88   if (Comment.empty())  in HandleComment()
92   unsigned Position = Comment.find_first_not_of(" \t");  in HandleComment()
93   if (Position >= Comment.size())  in HandleComment()
94     // We reached the end of the comment. Bail out.  in HandleComment()
97   Comment = Comment.drop_front(Position);  in HandleComment()
98   if (Comment.consume_front("LLVM-MCA-END")) {  in HandleComment()
100     Position = Comment.find_first_not_of(" \t");  in HandleComment()
101     if (Position < Comment.size())  in HandleComment()
102       Comment = Comment.drop_front(Position);  in HandleComment()
103     Regions.endRegion(Comment, Loc);  in HandleComment()
107   // Try to parse the LLVM-MCA-BEGIN comment.  in HandleComment()
108   if (!Comment.consume_front("LLVM-MCA-BEGIN"))  in HandleComment()
112   Position = Comment.find_first_not_of(" \t");  in HandleComment()
113   if (Position < Comment.size())  in HandleComment()
114     Comment = Comment.drop_front(Position);  in HandleComment()
116   Regions.beginRegion(Comment, Loc);  in HandleComment()
122   StringRef Comment(CommentText);  in HandleComment()  local
123   if (Comment.empty())  in HandleComment()
127   unsigned Position = Comment.find_first_not_of(" \t");  in HandleComment()
128   if (Position >= Comment.size())  in HandleComment()
129     // We reached the end of the comment. Bail out.  in HandleComment()
131   Comment = Comment.drop_front(Position);  in HandleComment()
133   // Bail out if not an MCA style comment  in HandleComment()
134   if (!Comment.consume_front("LLVM-MCA-"))  in HandleComment()
138   if (Comment.consume_front("BEGIN") || Comment.consume_front("END"))  in HandleComment()
144   auto [InstrumentKind, Data] = Comment.split(" ");  in HandleComment()
151           "No instrumentation kind was provided in LLVM-MCA comment");  in HandleComment()
154                       "Unknown instrumentation type in LLVM-MCA comment: " +  in HandleComment()