llvm/flang/documentation/directives.md

Compiler directives supported by F18
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* `!dir$ fixed` and `!dir$ free` select Fortran source forms.  Their effect
  persists to the end of the current source file.
* `!dir$ ignore_tkr (tkr) var-list` omits checks on type, kind, and/or rank.
[flang] Clean out obsolete parsing code. Handle !cdir$ fixed and free in parser. Work on scanning compiler directive lines. Fix glitch in earlier change to parse-state.h. Add ClassifyLine(), simplify some token sequence data lifetimes and interfaces. Handle continued directives. Obey !DIR$ FIXED and FREE in prescanner. Some refactoring of TokenSequence API, then support initial directives (FIXED, FREE, IGNORE_TKR). Fix !DIR$ IGNORE_TKR syntax, manual was wrong. Debugging directive scanning & parsing. Profiling-directed speed-up - do not map cooked source locations to Provenance until a Message is emitted. Turn some non-nullable pointers into references. Debugging. Handle !DIR$ IVDEP too, it is in a test. Accept directives in the execution part. Original-commit: flang-compiler/f18@fb2ff367ec0609b7307771f927f22fd7bab5e180 Reviewed-on: https://github.com/flang-compiler/f18/pull/34 Tree-same-pre-rewrite: false 2018-03-23 23:14:52 +01:00			`Compiler directives supported by F18`
			`====================================`

			* `!dir$ fixed` and `!dir$ free` select Fortran source forms. Their effect
			`persists to the end of the current source file.`
			* `!dir$ ignore_tkr (tkr) var-list` omits checks on type, kind, and/or rank.